RU2468517C1 - Method to realise functioning of hybrid automatic repeat request in system of wireless mobile communication - Google Patents

Abstract

FIELD: information technologies.

SUBSTANCE: for transfer of information, frames of duplex communication are used with frequency division (FDD) or duplex communication with time division (TDD), every of which has many subframes, in which a time curve of HARQ, also the time moment of data packet transfer and the time moment of HARQ feedback signal transfer, for DL HARQ are identified in accordance with information on distribution of data packets transferred in a subframe of a downlink (DL), No. 1 of the frame No. i, and HARQ functioning is realised in accordance with such identified time curve of HARQ. An index of at least one frame and an index of at least one subframe, which display the time curve of HARQ, are defined using 1 and i.

EFFECT: reduction of delay in transfer and reception of signals.

30 cl, 24 dwg, 12 tbl

Description

FIELD OF TECHNOLOGY

The present invention relates to a wireless mobile communication system. In particular, the present invention relates to a method for implementing the operation of a hybrid automatic retransmission request (HARQ) in a wireless mobile communication system.

BACKGROUND OF THE INVENTION

Wireless mobile communication systems have already been developed to provide a variety of services, including broadcast services, multimedia video transmission services, multimedia messaging services, etc. Future-generation wireless mobile communication systems are being developed to provide data services at a speed of 100 megabits per second (Mb / s) or at a higher speed for fast moving subscribers and at a speed of 1 gigabit per second (Gbit / s) or greater for slow-moving subscribers .

In a wireless mobile communication system, for reliable transmission and for reliable reception of data transmitted at high speeds between a base station (BS) and a mobile station (MS), the overhead of transmission of overhead control information is necessary and a short delay is required. To reduce the overhead of transmitting control information and delay, a hybrid automatic retransmission request (HARQ) method may be used.

In an embodiment of a HARQ wireless mobile communication system, when the transmitter transmits a data carrier signal to the receiver, the receiver transmits an acknowledgment (ACK) signal to the transmitter via the feedback channel indicating that the signal was received successfully or an acknowledgment signal ( NACK) indicating that the signal was not successfully received. After receiving an ACK or NACK signal, the transmitter first transmits new data or retransmits data to the receiver according to the HARQ scheme. HARQ schemes can be divided into two types, namely, traceable combination (CC) schemes and incremental redundancy (IR) schemes.

During HARQ operation, transmission and reception are performed in frames, which does not reduce the delay. Accordingly, there is a need to create a new frame structure that reduces the delay in transmitting and receiving signals, and HARQ timing structure for implementing the new frame structure.

SUMMARY OF THE INVENTION

TECHNICAL PROBLEM

One of the objects of the present invention is the solution of at least the above problems and / or disadvantages and providing at least the advantages described below. Accordingly, an object of the present invention is to provide a method for controlling the operation of a hybrid automatic retransmission request (HARQ) in a wireless mobile communication system.

Another object of the present invention is to provide a method for determining timing diagrams of transmitting data packets, transmitting HARQ on a feedback channel for a data packet, and retransmitting the data packet in a wireless mobile communication system.

Another object of the present invention is to provide a method for flexible determination of the timing diagram of the operation of HARQ in accordance with the time interval for transmitting a data packet and with the capabilities of the system in a wireless communication system.

THE SOLUTION OF THE PROBLEM

According to one aspect of the present invention, it provides a method for implementing HARQ operation in a wireless mobile communication system in which frames, each of which has a plurality of subframes, are used for transmitting information, in which a HARQ timing diagram is determined in accordance with information about the distribution of data packets transmitted in subframe downlink channel (DL) frame number l number i, wherein this HARQ timing chart includes a time data packet transmission on the downlink (DL) and the transmission time signa HARQ feedback for HARQ implemented in DL (DL HARQ), and implement the operation of HARQ according to a specific HARQ timing diagram. The index of at least one frame and the index of at least one subframe that display the HARQ timeline are determined using l and i .

According to another aspect of the present invention, there is provided a method for implementing HARQ operation in a wireless mobile communication system in which frames, each of which has a plurality of subframes, are used for transmitting information, in which a HARQ timing diagram is determined according to information about the distribution of data packets transmitted in the subframe DL frame number l is frame number i , the HARQ timing diagram includes the uplink (UL) data packet transmission time, the HARQ feedback signal transmission time, and the time repeatedly th transmission of a data packet for HARQ implemented in UL (UL HARQ), and implement HARQ operation according to a specific HARQ timing diagram. The index of at least one frame and the index of at least one subframe that display the HARQ timeline are determined using l and i .

Other objects, advantages, and characteristic features of the present invention will become apparent to those skilled in the art from the following detailed description, which, when considered in conjunction with the attached drawings, discloses embodiments of the present invention, given as examples.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of some embodiments of the present invention, which are given as examples, will become more apparent from the description below when considered in conjunction with the accompanying drawings, which depict the following:

1 illustrates the structure of a superframe in a frequency division duplex (FDD) mode according to an embodiment of the present invention, which is given as an example;

FIG. 2 illustrates a structure of a time division duplex (TDD) superframe according to an exemplary embodiment of the present invention;

FIG. 3 is a diagram illustrating a timing structure of a hybrid automatic retransmission request (HARQ) for transmitting data packets on a downlink (DL) in FDD mode according to an example embodiment of the present invention;

4 is a diagram illustrating a structure of a HARQ timing diagram for transmitting uplink (UL) data packets in FDD mode according to an example embodiment of the present invention;

5 is a diagram illustrating a structure of a HARQ timing diagram for transmitting DL data packets in TDD mode according to an exemplary embodiment of the present invention;

6 is a diagram illustrating a structure of a HARQ timing diagram for transmitting UL data packets in TDD mode according to an example embodiment of the present invention;

7 is a diagram illustrating a structure of a HARQ timing diagram for transmitting data packets over DL in TDD mode in the case of the coexistence of two different systems according to an exemplary embodiment of the present invention;

Fig. 8 is a diagram illustrating a structure of a HARQ timing diagram for transmitting UL data packets in TDD mode when two different systems coexist according to an exemplary embodiment of the present invention;

Fig. 9 is a diagram illustrating a structure of a HARQ timing diagram for transmitting data packets over DL in FDD mode according to another exemplary embodiment of the present invention;

10 is a diagram illustrating a structure of a HARQ timing diagram for transmitting data packets over DL in TDD mode according to another exemplary embodiment of the present invention;

11-14 are diagrams illustrating HARQ timing diagram structures based on the relationships between the downstream and upstream transmission volumes according to embodiments of the present invention, which are given as examples;

FIG. 15 illustrates a frame structure in a wireless mobile communication system supporting relay stations (RS), according to an example embodiment of the present invention;

FIG. 16 illustrates TD frame structures of RS frames according to embodiments of the present invention, which are given as examples;

17 is a diagram illustrating HARQ timing diagram structures for RS of an odd network backhaul according to embodiments of the present invention, which are given as examples;

Fig. 18 is a diagram illustrating a structure of a HARQ timing diagram for RS of an even transit network section according to an exemplary embodiment of the present invention; and

FIGS. 19 and 20 are diagrams illustrating signal flows for operations between a BS and an MS in accordance with DL HARQ and UL HARQ timing diagrams according to exemplary embodiments of the present invention.

It should be noted that in all the drawings for the image of the same or similar elements, features and structures used the same position numbers.

MODES FOR CARRYING OUT THE INVENTION

The following description with reference to the accompanying drawings is provided in order to facilitate a comprehensive understanding of the exemplary embodiments of the present invention defined by the claims and their equivalents. It includes various specific details to facilitate this understanding, but they should be regarded simply as exemplified. Accordingly, for those skilled in the art having a medium level of skill, it will be understood that various changes and modifications of the embodiments described herein may be made without departing from the scope and spirit of the present invention. In addition, descriptions of known functions and constructions are omitted for clarity and conciseness.

The terms and words used in the description below and in the claims are not limited to their bibliographic meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present invention. Accordingly, it should be apparent to those skilled in the art that the following description of embodiments of the present invention, which are given as examples, is provided for illustrative purposes only and not to limit the invention defined by the appended claims and their equivalents.

It should be understood that the singular forms include many objects, unless the context clearly indicates otherwise. Thus, for example, a reference to a “component surface” includes a reference to one or more such surfaces.

Embodiments of the present invention, which are given as examples, relate to a method for implementing a hybrid automatic retransmission request (HARQ) with a predetermined retransmission delay according to HARQ in a wireless mobile communication system that operates in frequency division duplex (FDD) mode time division duplex (TDD), frequency division half-duplex (H-FDD), or both: frequency division duplex (FDD) and duplex time division (TDD). In TDD or H-FDD mode, the frame can be configured with different ratios between DL and UL transmission. Therefore, the durations of DL and UL can be symmetric or asymmetric in the frame.

Below will be described the transmission and reception of signals transmitted between the BS and MS, based on the structure of the super-frame according to the HARQ scheme. Each superframe includes one or more frames, and each frame has one or more subframes. The term "subframe" is used interchangeably with the term "time interval". Each time slot or subframe includes one or more orthogonal frequency division multiple access (OFDMA) symbols.

In one embodiment, each of the stations: BS and MS, may include a controller for generating and analyzing packet distribution information, determining HARQ transmission time according to the frame structure described below and the HARQ timing diagram, at least one HARQ processor for generating and analyzing a data packet and feedback for HARQ at times determined by the controller, and a transceiver for transmitting and receiving packet distribution information, packet yes data and feedback for HARQ. For example, data packet distribution information may be delivered as an Extended MAP (A-MAP) information element (IE) defining resource allocation, and the data packet may be transmitted as a HARQ subpacket generated in accordance with the HARQ operation.

1 illustrates the structure of a superframe in an FDD mode according to an embodiment of the present invention, which is given as an example.

With reference to FIG. 1, a superframe 100 includes four frames 110, and each frame has eight subframes. In FDD mode, DL subframes 120 sent from BS to MS and UL subframes 130 sent from MS to BS occupy different frequency bands.

FIG. 2 illustrates the structure of a TDD superframe according to an exemplary embodiment of the present invention.

With reference to the drawing of FIG. 2, superframe 200 includes four frames 210, and each frame has eight subframes 220. In TDD mode, a predetermined number of subframes from the total number of subframes are used as DL subframes, and the remaining subframes in each frame are used as UL subframes. In the case illustrated in FIG. 2, the “DL to UL” ratio is 5: 3, which means that five DL subframes are set for the time interval allocated for DL transmission, and that three UL subframes are set for the time period reserved for UL transmission. Between the DL subframe and the next UL subframe, there is a transmission to reception (TTG) interval 230, and between the UL subframe and the next DL subframe there is a reception to transmission (RTG) interval 240.

Although FIGS. 1 and 2 illustrate that each superframe includes four frames, each of which has eight subframes, the number of N frames in the superframe and the number F of subframes in the frame may vary depending on the bandwidth and the distance between subcarriers in a wireless mobile communication system. In an orthogonal frequency division multiplexing orthogonal frequency division multiple access (OFDM / OFMDA) wireless mobile communication system having a channel bandwidth of 5, 10 and 20 MHz, each frame may have eight subframes, while the number subframes in a frame may be equal to 7 in an OFDM / OFDMA wireless mobile communication system with a channel bandwidth of 8.75 MHz. In addition, an OFDM / OFDMA wireless mobile communication system with a channel bandwidth of 7 MHz may have six subframes per frame. In addition, for a given frequency bandwidth, the number of subframes in a frame may be different in accordance with the length of the cyclic prefix (CP).

In HARQ, a certain correspondence relationship can be established between the time of the initial transmission and the time of the retransmission. This correspondence relationship is referred to as a HARQ timing structure or HARQ interlace. The terms “HARQ timing diagram structure” or “HARQ interlace” refer to a relationship between a subframe in which a MAP protocol message including resource allocation information (i.e., control information) is transmitted and a subframe in which a signal associated with the subframe in which the MAP message is transmitted, to the relationship between the subframe in which the signal is transmitted and the subframe in which the feedback signal is transmitted, and to the relationship between the feedback subframe and the subframe in which ayut initial transmission data or retransmission data in accordance with a feedback signal. A more detailed description of the structure of the HARQ timing diagram or HARQ interlace is given below.

(1) An information element (IE) that defines the distribution of data packets: it indicates a data packet transmitted over DL or a data packet transmitted over UL in a DL subframe.

(2) Data packet: the transmitter transmits a data packet in distributed resources according to IE defining the distribution of data packets.

(3) HARQ feedback for the received data packet: the receiver transmits an ACK or NACK signal according to whether an error was found in the received data packet.

(4) Initial transmission of a data packet or retransmission of a data packet in accordance with the HARQ feedback signal: the transmitter retransmits the data packet after receiving the NACK signal. The transmitter may further provide resource allocation information for retransmission. On the other hand, after receiving an acknowledgment signal (ACK), the transmitter may perform the initial transmission of a new data packet.

HARQ schemes can be subdivided into an asynchronous HARQ scheme and a synchronous HARQ scheme. For a scheme with asynchronous HARQ, the structure of the HARQ timing diagram defined as (1), (2) and (3) must be specified, while for a scheme with synchronous HARQ, the structure of the HARQ timing diagram must be defined as (1) - (four). In order to define these structures of the HARQ operation timing diagrams, a predetermined correspondence relation must be established between at least one DL subframe in the time interval allocated for DL transmission and at least one UL subframe in the time interval allocated for transmission on DL UL

A detailed description of the HARQ timing diagrams for TDD and FDD modes will now be provided.

FIG. 3 is a diagram illustrating a structure of a HARQ timing diagram for transmitting data packets over DL in FDD mode according to an example embodiment of the present invention. As illustrated in FIG. 3, the structure of a HARQ timing diagram for transmitting data packets over DL in FDD mode is developed based on the frame structure in FDD mode illustrated in FIG. 1. It is believed that the number N of frames in a superframe is equal to 4, that the number F of subframes in a frame is 8, and that the processing time in the transmission / reception (Tx / Rx) for the data packet is 3 subframes shift z transmitting a feedback signal DL HARQ is 0 , and the shift u of the DL HARQ transmission is 0. The processing time for transmission (Tx) is defined as the time required to transmit the next data after receiving the HARQ feedback signal at the transmitter, and the processing time for reception (Rx) is defined as the time required for transmission HARQ feedback signal after receiving data in emnike.

With reference to FIG. 3, the transmitter transmits information about the distribution of data packets and the data packet transmitted over DL in the position 300 indicated by the DL subframe number 1 (i.e., in the first DL subframe) of the frame number i (i.e., the i- th frame ) in the DL frequency band. The receiver then transmits the HARQ feedback signal for the DL data packet in the reference number 310 of the UL subframe number 5 of frame number i in the UL frequency band. If the HARQ feedback signal is a NACK signal, then the transmitter retransmits the data packet in the designated position number 320 subframe DL frame number 1 frame number ( i +1) in the DL frequency band. For the retransmitted data packet, the receiver transmits the HARQ feedback signal at the indicated position number 330 subframe UL frame number 5 frame number ( i +1) in the UL frequency band.

To describe the above HARQ operation with reference to table 1 below, the index n of the subframe in which the HARQ feedback signal is transmitted is 5, and it is determined by calculating the value { ceil (1 + 4) mod8}, the index j of the frame in which the HARQ feedback signal is i , it is determined by calculating the value { i + floor ( ceil (1 + 4) / 8} mod4, and the index k of the frame in which the data packet for retransmission according to HARQ is transmitted is i +1, and it is determined by calculating the value { j + floor ((5 + 4) / 8) +0} mod4. The function " ceil " is a round function argument upward to the nearest integer greater than or equal to the argument, and the floor function is the function of rounding the argument down to the nearest integer less than or equal to the argument.

Table 1 presents in tabular form the structure of a timing diagram of a DL HARQ operating in an FDD mode (FDD DL HARQ) according to an exemplary embodiment of the present invention. Table 1 can be used to determine the time of transmission of at least one of the following data: A-MAP protocol information that defines the allocation of resources, with information about the distribution of data packets, the HARQ subpacket in which the data, signal (ACK or NACK) HARQ feedback and HARQ retransmission subpacket. However, it should be understood that table 1 should not be construed as limiting the present invention.

Table 1 Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE) defining resource allocation transmitted over DL l i DL transmitted HARQ subpacket

i HARQ Feedback in UL

DL HARQ subpacket (Intelligent HARQ (SHARQ)) m

In Table 1, N denotes the number of frames in a superframe. If each superframe includes four subframes, then N is 4. F denotes the number of subframes in the frame. For example, in the case of a bandwidth of 5, 10 and 20 MHz, N = 4 and F = 8. i , j and k denote the indices of the UL or DL frame. l denotes the index of the DL subframe in which information on the distribution of data packets is transmitted, m denotes the index of the DL subframe in which the initial transmission of the data packet is carried out, and n denotes the index of the UL subframe in which the HARQ feedback signal for the received data packet is transmitted. In addition, z denotes a DL HARQ feedback signal shift, and u denotes a DL HARQ transmission shift (DL HARQ Tx). Both z and u are represented as the number of frames. Therefore, i = 0,1, ..., N -1, j = 0,1, ..., N -1, l = 0, N _A-MAP , ..., N _A-MAP ( ceil ( F / N _A-MAP ) -1), n = 0,1, ..., F -1, m = 0,1, ..., F -1, z = 0,1, ..., z _max -1 and u = 0,1, ..., u _max -1.

N _A-MAP denotes a transmission period of information about the distribution of data packets, expressed as the number of subframes. Information about the distribution of data packets is delivered in a typical MAP protocol message or A-MAP protocol message. If information about the distribution of data packets is transmitted in each DL subframe, then N _A-MAP is 1. If information about the distribution of data packets is transmitted in every second subframe DL, then N _A-MAP is 2. In this case, l = 0.2, ..., 2 ( ceil ( F / 2) -1).

For transmitting and receiving DL HARQ in FDD mode (FDD DL HARQ), as illustrated in FIG. 3, F = 8, N = 4, z = 0 and u = 0. Information about the distribution of data packets in the DL transmitted in the indicated by the position number 300 subframe DL number l of the frame number i indicates the subframe DL number m of the frame number i . When information about the distribution of data packets is transmitted in each DL subframe (that is, N _A-MAP = 1), this information about the distribution of data packets indicates that the transmission of the data packet begins in the DL subframe. That is, m = 1. On the other hand, when data packet distribution information is transmitted in every second DL subframe (i.e., N _A-MAP = 2), then data packet distribution information in DL subframe number l indicates that data packet transmission begins in DL subframe number l or number ( l +1). That is, m is equal to l or ( l +1). Information about the distribution of data packets includes relevance information indicating l or ( l +1).

A data packet indicated by data packet distribution information may occupy one or more DL subframes. The transmission time interval (TTI) of a data packet whose transmission begins in the DL subframe number m is denoted as N _TTI . That is, N _TTI denotes the number of subframes that the data packet spans. For example, the N _TTI may be specified or reported by packet distribution information. If the data packet spans one subframe, then N _TTI = 1, and if the data packet spans four subframes, then N _TTI = 4.

The HARQ feedback signal for the data packet, the transmission of which begins in the DL subframe number m of the frame number i , is transmitted in the UL subframe number n of the frame number j . According to the index m of the subframe in which the data packet is transmitted, n is determined by the following equation:

(1)

(one)

The index j of the UL frame in which the HARQ feedback signal is transmitted is determined in accordance with the index m of the subframe and the index i of the frame of the data packet. This time interval between the moment of completion of the transmission of the data packet and the moment of transmission of the HARQ feedback signal creates a frame shift. The time interval designated as Gap 1 is calculated according to the following equation:

(2)

(2)

where N _TTI denotes the transmission time interval (TTI) of the data packet during DL HARQ operation, expressed as the number of subframes, and F denotes the number of subframes in the frame.

Since the communication periods follow one after another in a system operating in FDD mode, the interval Gap 1 is determined in accordance with the TTI of the packet transmitted over DL and with the number of subframes in the frame, regardless of the indices of the subframes.

In DL HARQ, the shift z of the DL HARQ feedback signal is set such that the interval Gap 1 described by equation (2) is equal to or greater than the reception processing time (Rx). For example, if the interval Gap 1 is equal to or greater than the processing time at reception (Rx), then z = 0, whereas if the interval Gap 1 is shorter than the processing time at reception (Rx), then z = 1. The z value is set such that the HARQ feedback signal is transmitted in a subframe with the same index in the frame having a delay. In fact, z represents the shift, expressed as the number of frames, and this does not mean that the index of the subframe in which the HARQ feedback signal is transmitted is changed.

Since z is defined in this way, j is equal to:

(3)

(3)

When the retransmission of a data packet on DL is performed in an asynchronous HARQ scheme, the time point of retransmission of the data packet on DL is indicated by the retransmission pointer contained in the data packet distribution information. Meanwhile, if the retransmission of a data packet over DL is performed in a synchronous HARQ scheme, then the retransmission occurs in subframe number m of frame number k . With reference to table 1, the frame index k is determined based on the frame index j in which the HARQ feedback signal is transmitted, and the subframe index m in which the data packet is transmitted upon retransmission is the same as the subframe index of the previous transmission of the transmitted data packet. The frame shift is generated in accordance with the time interval between the time of transmission of the HARQ feedback signal and the time of retransmission of the data packet. The time interval designated as Gap 2 is defined by the following equation:

(4)

(four)

where N _CTRL.TTI denotes the TTI of the HARQ feedback when DL HARQ is operating, and F denotes the number of subframes in the frame. Since the communication periods follow one after another in an FDD system, the Gap 2 interval is determined in accordance with the TTI of the feedback signal transmitted by UL and the number of subframes in the frame, regardless of the indices of the subframes. The HARQ feedback signal typically spans one subframe.

In DL HARQ, the DL HARQ transmission shift u (DL HARQ Tx) is set such that the interval Gap2 described by equation (4) is equal to or greater than the processing time of the transmission. For example, if the interval Gap2 is equal to or greater than the processing time during transmission (Tx), then u = 0, whereas if the interval Gap2 is shorter than the processing time during transmission, then u = 1. The u value is set such that the following HARQ data is transmitted in a frame having a delay. In fact, u represents the shift, expressed as the number of frames, and this does not mean that the index of the subframe in which the HARQ data is transmitted is changed.

Since u is defined in this way, k is equal to:

(5)

(5)

As described above, if the time required to process the transmitted signal is not provided, then the retransmission time according to HARQ may have a delay of one frame (i.e., u = 1). Here, the phrase “time is sufficient” means that the time required to process the signal transmission (processing time during transmission) and the time required to process the reception of the signal (processing time when receiving) exceeds the known reference value. The system sets this reference value initially or transmits by broadcast.

If the indices j and k frames are equal to or greater than the number N of frames in the superframe, then the index of the superframe is increased by 1, and the indices j and k of the frames are the values obtained by calculations by formulas with the operation "modulo" from equation (3 ) and equations (5). With reference to FIG. 1 and FIG. 2, it can be considered that N = 4.

With reference to equation (2) and equation (4), the DL HARQ feedback z -shift and DL HARQ transmission shift u (DL HARQ Tx) can be determined in accordance with the HARQ operation TTI (data packet or feedback TTI) and with the signal processing performance that the system (transmitter and receiver) has in FDD mode. The signal processing performance information may be predetermined or may be transmitted by the system by broadcast. In addition, as another example embodiment of the invention, it can be provided that z and u transmit in the system configuration information in a broadcast method in accordance with a system operation diagram.

FIG. 4 is a diagram illustrating a structure of a HARQ timing diagram for transmitting UL data packets in FDD mode according to an exemplary embodiment of the present invention. Assuming that the number of N frames in the superframe is 4, that the number F of subframes in the frame is 8, and that the transmission / reception processing time is 3 subframes, the UL HARQ feedback signal offset w is 0 and the UL HARQ transmission offset v is UL (UL HARQ Tx) is 0.

Referring to Figure 4, after receiving information on the allocation of data packets in designated position number 400 DL subframe of the frame number 1 to the number i DL band transmitter transmits UL data packet in designated position number 410 UL subframe of the frame number 5 in the strip number i UL frequencies. The receiver transmits the HARQ feedback signal in the position indicated by the number 420 of the DL subframe frame number 1 frame number ( i +1) in the DL frequency band according to whether there is an error in the received data packet. If the HARQ feedback signal is a NACK signal, then the transmitter retransmits the data packet in the indicated position number 430 to the UL subframe, frame number 5, frame number ( i +1) in the UL frequency band. If data packet distribution information indicating the retransmission of the packet on the UL is transmitted in the DL 420 subframe, then the UL data packet is retransmitted in accordance with the data packet distribution information.

To describe the above HARQ operation with reference to Table 2 below, the index j of the frame in which the data packet is transmitted over UL is i , and it is determined by calculating the value { i + floor ( ceil (1 + 4) / 8) +0 } mod4, the index m of the subframe in which the UL data packet is transmitted is 5, and it is determined by calculating the value { ceil (1 + 4) mod8}, and the index k of the frame in which the HARQ feedback signal is transmitted is i ( j = i) +1, and it is determined by calculating the value {j + floor ((5 + 4) / 8) +0} mod4. The index of the subframe in which the HARQ feedback signal is transmitted is 1. If the HARQ feedback signal is a NACK signal, then the index of the frame in which the data packet for retransmission according to HARQ is transmitted is i +1, and it is determined by calculating the value ( k + floor ( ceil (1 + 4) / 8) +0) mod4, and the index m of the subframe in which the data packet for retransmission according to HARQ is transmitted is 5. Table 2 shows the structure of the UL HARQ timing diagram in FDD mode (FDD UL HARQ) according to an embodiment of the present invention, a cat ing given as an example. Table 2 can be used to determine the time of transmission of at least one of the following data: A-MAP protocol information that defines the allocation of resources, with information about the distribution of data packets, the HARQ subpacket in which the data, signal (ACK or NACK) HARQ feedback and the subpacket retransmitted according to HARQ. However, it should be understood that table 2 should not be construed as limiting the present invention.

table 2 Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE) defining resource allocation transmitted over DL l i UL HARQ Subpacket

HARQ Feedback in DL l

UL HARQ Subpacket m

In Table 2, N denotes the number of frames in a superframe. If each superframe includes four subframes, then N is 4. F denotes the number of subframes in the frame, i , j , k and p denote the indices of the UL or DL frame. l denotes the index of the DL subframe in which information about the distribution of data packets is transmitted, m denotes the index of the UL subframe in which the transmission of the data packet begins, w denotes the UL HARQ feedback signal shift, and v denotes the UL HARQ transmission shift (UL HARQ Tx) . Both parameters w and v are presented as the number of frames. Therefore, i = 0,1, ..., N -1, j = 0,1, ..., N -1, k = 0,1, ..., N -1, p = 0,1, ..., N -1, l = 0, N _A-MAP , ..., N _A-MAP ( ceil ( F / N _A-MAP ) -1), m = 0,1, ..., F -1, n = 0,1, ..., F -1, w = 0,1, ..., w _max -1 and v = 0,1, ..., v _max -1.

N _A-MAP denotes a transmission period of information about the distribution of data packets, expressed as the number of subframes. If information about the distribution of data packets is transmitted in each DL subframe, then N _A-MAP is 1. If information about the distribution of data packets is transmitted in every second subframe DL, then N _A-MAP is 2. In this case, l = 0.2, ..., 2 ( ceil ( F / 2) -1).

When transmitting and receiving UL HARQ in FDD mode (FDD UL HARQ), UL packet data distribution information transmitted in DL subframe number l of frame number i indicates that data packet transmission begins in UL subframe number m of frame number j . When data packet allocation information is transmitted in each DL subframe (i.e., N _A-MAP = 1), this data packet distribution information indicates that transmission of the data packet begins in UL subframe number n . That is, m = n . On the other hand, when data packet allocation information is transmitted in every second DL subframe (i.e., N _A-MAP = 2), this data packet distribution information in DL subframe number l indicates that the transmission of the data packet begins in the UL subframe number n or number ( n +1). That is, m is n or ( n +1). The information about the distribution of data packets includes information on relevance indicating n or ( n +1). Here n is given by the following expression: n = ceil ( l + F / 2) modF.

A data packet indicated by data packet allocation information may occupy one or more UL subframes. The TTI of the data packet is designated as N _TTI . N _{TTIs are} reported by packet allocation information.

The HARQ feedback signal for a data packet whose transmission begins in UL subframe number m of frame number j is transmitted in subframe DL number l of frame number k . That is, the data packet distribution information and the HARQ feedback signal are transmitted in subframes with the same index. In accordance with the indices m and j of the subframe and frame, the frame index k is determined as described in table 2.

UL HARQ transmission shift v (UL HARQ Tx) and UL HARQ feedback signal shift w described in Table 2 can be calculated by Equation (2) and Equation (4). The UL HARQ transmission shift v (UL HARQ Tx) is taken into account for packet transmission or retransmission when data packet allocation information is received or a HARQ feedback signal is received.

When a UL data packet is retransmitted in an asynchronous HARQ scheme, the UL data packet retransmission time is indicated by the location of the data packet allocation information and the retransmission indicator contained in the data packet distribution information. Meanwhile, if the retransmission of the data packet over UL is performed in a synchronous HARQ scheme, then the retransmission occurs in subframe number m of frame number p . With reference to table 2, the frame index p is determined in accordance with the indices l and k of the subframe and frame.

The UL HARQ transmission shift v (UL HARQ Tx), expressed as the number of frames, denotes the time interval between the transmission time of DL packet distribution information or DL HARQ feedback signal and the transmission time of the UL data packet. The UL HARQ transmission shift v (UL HARQ Tx) is determined by taking into account the Gap interval 1 ′, which is calculated by substituting the TTI of the data packet distribution or HARQ feedback signal into the TTI of the data packet transmitted over DL, namely, N _TTI , in the equation (2). Typically, data packet allocation information or a HARQ feedback signal spans one subframe.

In UL HARQ, the UL HARQ transmission shift v (UL HARQ Tx) is set such that the gap Gap 1 ′ is equal to or greater than the transmission processing time. For example, if the interval Gap 1 'is equal to or greater than the processing time during transmission, then v = 0, whereas if the interval Gap 1' is shorter than the processing time during transmission, then v = 1.

The shift of the UL HARQ feedback signal w , expressed as the number of frames, denotes the time interval between the moment of completion of the transmission of the UL data packet and the time of transmission of the DL HARQ feedback signal for the UL transmitted data packet. The offset w of the UL HARQ feedback signal is determined taking into account the Gap 2 ′ interval, which is calculated by substituting the TTI of the UL data packet into the TTI of the HARQ feedback signal for DL HARQ to function in equation (4).

In UL HARQ, the parameter w is set such that the Gap 2 ′ interval is equal to or greater than the processing time at reception. For example, if the interval Gap 2 'is equal to or greater than the processing time at reception, then w = 0, whereas if the interval Gap 2' is less than the processing time at reception, then w = 1.

As described above, the UL HARQ transmission shift v (UL HARQ Tx) and the UL HARQ feedback signal shift w are determined in accordance with the HARQ operation TTI (data packet or feedback signal TTI) and the signal processing performance that the system (transmitter and receiver) operating in FDD mode. The signal processing performance information may be predetermined or may be transmitted by the system by broadcast. In addition, as another example embodiment, it can be provided that setpoints are transmitted as w and v by broadcasting information in the system configuration information in accordance with the system operation diagram. If the frame indices j , k and p are equal to or greater than N in Table 2, then the superframe index s is incremented by one, and the frame indices j , k and p are values obtained by calculations by formulas with the modulo operation described in table 2.

In TDD mode, each frame includes DL subframes and UL subframes. According to an embodiment of the present invention, which is given as an example, a communication channel with a large number of subframes is divided based on a communication channel with a smaller number of subframes, in order to thereby match the DL subframes with the UL subframes according to a specific rule. Each of the areas resulting from the separation of the communication channel includes one or more subframes and is mapped to one subframe of the communication channel with a smaller number of subframes. That is, M subframes are divided into N regions ( M > N ), each subframe being in a predetermined correspondence relation according to an embodiment of the present invention, which is given as an example. A more detailed description of the compliance relationship is given below.

5 is a diagram illustrating a structure of a timing diagram of a DL HARQ operation for a TDD mode of 5: 3 according to an exemplary embodiment of the present invention. The structure of the timing diagram of the operation of the DL HARQ is configured based on the frame structure in the TDD mode illustrated in FIG.

With reference to FIG. 5, the transmitter transmits information about the distribution of data packets and a data packet transmitted over DL in the indicated position number 500 subframe DL number 1 of the frame number i . The receiver then transmits the HARQ feedback signal for the DL data packet in the reference number 510 indicated by UL subframe number 0, frame number i . The transmitter retransmits the data packet in the indicated position number 520 subframe DL frame number 1 frame number ( i +1) if the HARQ feedback signal is a NACK signal. Information about the distribution of data packets indicating the transmission of a data packet over DL can also be transmitted in the DL subframe number 1, which is indicated by the position number 520. For the retransmitted data packet, the receiver transmits a HARQ feedback signal in the position indicated by the number 530 to the UL subframe frame number 0 of the frame number ( i +1).

Although it has been described above that DL subframes and UL subframes are individually indexed at times allocated for transmission on DL and UL, respectively, DL and UL subframes can be indexed sequentially in a frame. In this case, the index x of the UL subframe is replaced by the index D + x of the subframe in the frame. D denotes the length of time allocated for DL transmission.

The following is a description of the above HARQ operation with reference to Table 3. Table 3 illustrates the structure of a DL HARQ function timing diagram for a DL: UL = D : U mode according to an exemplary embodiment of the present invention. D denotes the length of the time allotted for transmission on DL (i.e., the number of DL subframes), and U denotes the length of the time allotted for transmission on UL (i.e., the number of UL subframes). Table 3 can be used to determine the time of transmission of at least one of the following data: an A-MAP protocol information element (A-MAP IE) defining a resource allocation, with data packet allocation information, a HARQ subpacket in which HARQ feedback data, signal (ACK or NACK) packet, and HARQ retransmission subpacket. However, it should be understood that table 3 should not be construed as limiting the present invention.

Table 3 Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE) defining resource allocation transmitted over DL l i UL HARQ Subpacket

i HARQ Feedback in DL

UL HARQ Subpacket l

In Table 3, D denotes the number of DL subframes in the DL frame, U denotes the number of UL subframes in the UL frame, and N denotes the number of frames in the superframe. If each superframe includes four subframes, then N is 4. F denotes the number of subframes in the frame and, therefore, F = D + U. i , j and k denote frame indices. l denotes the index of the subframe DL in which information about the distribution of data packets is transmitted, m denotes the index of the subframe in which transmission of the data packet transmitted over DL begins, and n denotes the index of the subframe in which the HARQ feedback signal for the data packet transmitted over DL. In addition, z denotes a DL HARQ feedback signal shift, and u denotes a DL HARQ transmission shift (DL HARQ Tx). Therefore, j = 0,1, ..., N -1, k = 0,1, ..., N -1, l = 0, N _A-MAP , ..., N _A-MAP ( ceil ( D / N _A-MAP ) -1), m = 0,1, ..., D -1, n = 0,1, ..., U -1, z = 0,1, ..., z _max -1 and u = 0,1, ..., u _max -1.

N _A-MAP denotes a transmission period of information about the distribution of data packets. If information about the distribution of data packets is transmitted in each DL subframe, then N _A-MAP is 1, and l takes values in the range from 0 to D -1. If information about the distribution of data packets is transmitted in every second DL subframe, then N _A-MAP is 2. In this case, l = 0.2, ..., 2 ( ceil ( F / 2) -1).

The parameter K is determined in accordance with the relationship between D and U. For example, K is given by equation (6) or equation (7). Depending on the bandwidth of the system considered in the system, the processing period and the period N _{A-MAP of} transmitting information about the distribution of data packets, K may become equal to K _c or K _f . K _c is the value calculated using the ceil () function of rounding the argument up to the nearest integer, and K _f is the value calculated using the floor () function of rounding the argument down to the nearest integer. The decision to choose K depends on the system configuration. Although typically K is K _f , K _c may be used provided that F is an odd number and that D < U / N _A-MAP .

(6)

(6)

(7)

(7)

If D is equal to or greater than U , then K _c and K _f are zero or positive values, and otherwise, they are equal to negative values.

When F is an even number, the functions ceil () and floor () act in the same way, and therefore K _c and K _f are identical. According to another embodiment of the invention, K can be set as follows. If D < U , then K = - ceil {( U - D ) / 2}, and if D ≥ U , then K = floor {( D - U ) / 2}.

When transmitting and receiving DL HARQ in TDD mode (TDD DL HARQ), DL packet data distribution information transmitted in DL subframe frame number l of frame i indicates that data packet transmission begins in DL subframe of frame number m of frame i . When information about the distribution of data packets is transmitted in each DL subframe (that is, N _A-MAP = 1), this information about the distribution of data packets indicates that the transmission of the data packet begins in the DL subframe. That is, m = 1. On the other hand, when information about the distribution of data packets is transmitted in every second DL subframe (i.e., N _A-MAP = 2), this information about the distribution of data packets in DL subframe number l indicates that the transmission of the data packet begins in the DL subframe number l or number ( l +1). That is, m is equal to l or ( l +1). Information about the distribution of data packets includes relevance information indicating l or ( l +1).

A data packet indicated by data packet distribution information may occupy one or more DL subframes.

The HARQ feedback signal for the data packet, the transmission of which begins in the DL subframe number m of the frame number i , is transmitted in the UL subframe number n of the frame number j . According to the DL: UL ratio ( D : U ), n can be mapped to one or more DL subframe indexes. If D ≤ U , then each UL subframe is mapped to one DL subframe. On the other hand, if D > U , then each UL subframe is mapped to one or more DL subframes. As indicated in table 3, the index n of the subframe is determined in accordance with K and m , and the index j of the frame is determined in accordance with i and z. That is, table 3 defines some correspondence relationship between the DL subframe indexes and the UL subframe indexes in one frame in accordance with the DL: UL ratio. Table 1 shows that the case D = U is included in the case D ≤ U. In another embodiment, the case D = U can be included in the case D ≤ U , as well as in the case D ≥ U , since in the case D = U K is zero. This document explains that the HARQ timing diagram for D = U is included in the case D ≤ U.

As described above with reference to the structure of the DL HARQ timing diagram in the FDD mode of Table 1, z denotes a shift of the DL HARQ feedback signal. In order to save sufficient processing time at reception, z is used to establish the index of the frame in which the HARQ feedback signal is transmitted. Since the DL subframe is interlaced with the UL subframe in the frame along the time axis, the interval Gap 3, which is calculated according to equation (8), is used to determine the shift z of the DL HARQ feedback signal.

(8)

(8)

where M _DATA denotes the number of subframes in which the data packet is transmitted, a denotes the index of the subframe at which transmission of the data packet begins, N _TTI denotes the TTI of the data packet, and b denotes the index of the subframe in which the HARQ feedback signal for this data packet is transmitted. Accordingly, with reference to table 3, M _DATA = D , a = m , and b = n .

In DL HARQ in TDD mode (TDD DL HARQ), the shift z of the DL HARQ feedback signal is set so that the interval Gap 3 described by equation (8) is equal to or greater than the processing time at reception. For example, if the Gap 3 interval is equal to or greater than the processing time at reception, then z = 0, whereas if the Gap3 interval is shorter than the processing time at reception, then z = 1.

When the retransmission of a data packet over DL is performed in an asynchronous HARQ scheme, the retransmission of a data packet transmitted over DL is indicated by the retransmission pointer contained in the data packet allocation information. Meanwhile, if the retransmission of a data packet over DL is performed in a synchronous HARQ scheme, then the retransmission occurs in subframe number m of frame number k . With reference to table 3, the frame index k is determined by the frame index in which the HARQ feedback signal is transmitted, and the HARQ transmission shift u on DL (DL HARQ Tx). If information about the distribution of data packets indicating the retransmission of the data packet on DL is transmitted, then retransmission is performed based on the information about the distribution of data packets.

As described above with reference to the structure of the DL HARQ timing diagram in the FDD mode from Table 1, u denotes the DL HARQ transmission shift (DL HARQ Tx) determined in accordance with the Gap 4 interval, which is calculated according to equation (9). Gap 4 denotes the time interval between the time of transmission of the HARQ feedback signal and the beginning of retransmission of data in TDD mode.

(9)

(9)

where M _CRTL denotes the number of subframes in which HARQ feedback signals are transmitted, b denotes the index of the subframe in which the HARQ feedback signal is transmitted, and a denotes the index of the subframe in which retransmission of the data packet after the HARQ feedback signal begins. Therefore, in Table 3, M _CRTL = U , b = n, and a = m .

In DL HARQ in TDD mode, the DL HARQ transmission shift u (DL HARQ Tx) is set such that the Gap 4 interval calculated according to equation (9) is equal to or greater than the transmission processing time. For example, if the Gap4 interval is equal to or greater than the processing time during transmission, then u = 0. Otherwise, if the Gap4 interval is shorter than the processing time during transmission, then u = 1. In the case where u = 1, this means that there is not enough time to process the transmitted signal, and therefore, the retransmission time according to HARQ has a delay of one frame.

In table 3, the indices j and k frames are equal to or greater than the total number of N frames in the superframe, the index s of the superframe is increased by 1, and the indices j and k of the frames are values obtained by calculations using modulo operations, which illustrated in table 3.

As another exemplary embodiment of the present invention, it may further be provided that the DL HARQ feedback signal shift z and DL HARQ transmission shift u (DL HARQ Tx) are determined in accordance with the correspondence relationship of the UL and DL subframes, with TTI functioning HARQ (TTI data packet or feedback signal) and / or with the signal processing performance that the system has.

6 is a diagram illustrating a structure of a HARQ timing diagram for transmitting UL data packets in TDD mode according to an exemplary embodiment of the present invention.

Referring to Figure 6, after receiving information about the distribution of data packets in designated position number 600 DL subframe number 1 frame number i transmitter transmits UL data packet in designated position number 610 UL subframe number 0 frame number i. The receiver transmits the HARQ feedback signal for the UL transmitted data packet in the position 620 indicated by the DL subframe frame number 1 frame number ( i +1) according to whether there is an error in the received data packet. If the HARQ feedback signal is a NACK signal, then the transmitter retransmits the data packet in the indicated position number 630, sub-frame UL frame number 0 frame number ( i +1). If data packet distribution information indicating the retransmission of the data packet on the UL is transmitted in the DL subframe 620, then the data packet is retransmitted on the UL in accordance with the data packet distribution information.

Although it has been described above that DL subframes and UL subframes are individually indexed at times allocated for transmission on DL and UL, respectively, DL and UL subframes can be indexed sequentially in a frame. In this case, the index x of the UL subframe is replaced by the index D + x of the subframe in the frame. D denotes the length of time allocated for DL transmission.

Table 4 illustrates the structure of the timing diagram of the operation of UL HARQ in TDD mode according to an example embodiment of the present invention. Table 4 can be used to determine the time of transmission of at least one of the following data: A-MAP protocol information that defines the allocation of resources, with information about the distribution of data packets, the HARQ subpacket in which the data, signal (ACK or NACK) HARQ feedback and the subpacket retransmitted according to HARQ. However, it should be understood that table 4 should not be construed as limiting the present invention.

Table 4 Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE) defining resource allocation transmitted over DL l i UL HARQ Subpacket

HARQ Feedback in DL l

UL HARQ Subpacket m

In table 4, D denotes the number of DL subframes in the DL frame, U denotes the number of UL subframes in the UL frame, K is a parameter defined by equation (6) or equation (7) in accordance with the ratio between D and U , and N denotes the number of frames in the superframe. If each superframe includes four subframes, then N is 4. i , j , k and p denote frame indices. l denotes the index of the DL subframe in which the data packet distribution information is transmitted, m denotes the index of the subframe in which the transmission of the data packet begins, w denotes the UL HARQ feedback shift, and v denotes the UL HARQ transmit shift (UL HARQ Tx). Therefore, i = 0,1, ..., N -1, j = 0,1, ..., N -1, k = 0,1, ..., N -1, p = 0,1, ..., N -1, l = 0, N _A-MAP , ..., N _A-MAP ( ceil ( D / N _A-MAP ) -1), m = 0,1, ..., U -1, w = 0,1, ..., w _max -1 and v = 0,1, ..., v _max -1.

N _A-MAP denotes a transmission period of information about the distribution of data packets. If information about the distribution of data packets is transmitted in each DL subframe, then N _A-MAP is 1, and l takes values in the range from 0 to D -1. If information about the distribution of data packets is transmitted in every second DL subframe, then N _A-MAP is 2. In this case, l = 0.2, ..., 2 ( ceil ( D / 2) -1).

When transmitting and receiving UL HARQ in TDD mode (TDD UL HARQ), UL packet data distribution information transmitted in DL subframe number l of frame number i indicates a data packet transmission starting in UL subframe number m of frame number j . In accordance with the DL: UL ratio ( D : U ) and with the distribution information transmission period N _A-MAP , m may be mapped to one or more DL subframes. If ceil ( D / N _A-MAP ) ≥ U , that is, if the number of DL subframes in which DL control information is transmitted (data packet allocation information or HARQ feedback signals) is equal to or greater than the number of UL subframes, then each UL subframe is mapped to one or more DL subframes. On the other hand, if ceil ( D / N _A-MAP ) < U , that is, if the number of DL subframes in which DL control information is transmitted (data packet allocation information or HARQ feedback signals) is smaller, than the number of UL subframes, then each DL subframe is mapped to one or more UL subframes.

If the number of DL subframes in which data packet distribution information is transmitted is equal to or greater than the number of UL subframes ( ceil ( D / N _A-MAP ) ≥ U ), then the transmission of the data packet in one UL subframe may be indicated by one or a large number of DL subframes. That is, if l is less than K , then information about the distribution of data packets in the subframe DL number l indicates that the transmission of the data packet begins in the subframe UL number 0. If l is equal to or greater than K and less than U + K , then information about the distribution of data packets in the DL subframe number l indicates that the transmission of the data packet begins in the UL subframe number ( l - K ). If l is equal to or greater than U + K , then information about the distribution of data packets in the DL subframe number l indicates that the transmission of the data packet begins in the UL subframe number ( U -1).

On the other hand, if the number of DL subframes in which data packet distribution information is transmitted is less than the number of UL subframes ( ceil ( D / N _A-MAP ) < U ), then the data packet distribution information in the DL subframe may indicate transmitting a data packet in one or more UL subframes. For example, information about the distribution of data packets in the DL subframe number 0 indicates that the data packet is transmitted in the UL subframes from number 0 to number ( l - K + N _A-MAP -1). Relevance information associated with indicating this is transmitted in the data packet distribution information.

If information about the distribution of data packets is transmitted in only one DL subframe ( ceil ( D / N _A-MAP ) = 1), then the DL subframe indicates that the data packet is transmitted in all UL subframes. A data packet TTI may be indicated by data packet distribution information, and a frame index j is determined in accordance with i and v .

As described above with reference to the structure of the UL HARQ timing diagram in FDD mode from Table 2, v denotes the UL HARQ transmission shift (UL HARQ Tx) and w denotes the UL HARQ feedback signal shift. UL HARQ transmission shift v (UL HARQ Tx) is used to transmit or retransmit a data packet after receiving information about the distribution of data packets or the HARQ feedback signal. As described above, the UL HARQ transmission shift v (UL HARQ Tx) is used to establish the index of the frame in which the data packet is transmitted, so as to provide sufficient processing time for the transmission.

In UL HARQ in TDD mode, the UL HARQ transmission shift v (UL HARQ Tx) is determined according to a Gap interval 4 ′ calculated by substituting the number D of DL subframes in which control information such as packet allocation information or feedback signals is transmitted HARQ, instead of M _CTCL , by substituting index l of the subframe in which HARQ distribution information or feedback is transmitted, instead of b , and by substituting index m of the subframe in which the data packet is initially transmitted or retransmitted, besides then a to equation (9).

If the gap Gap4 'is less than the processing time during transmission necessary to transmit the data packet after receiving the HARQ feedback signal, then v = 1, otherwise v = 0.

In UL HARQ in TDD mode, to adjust the timing of the transmission of the HARQ feedback signal after receiving the data packet, the shift w of the UL HARQ feedback signal is determined in accordance with the gap Gap 3 ′ calculated by substituting the number U of subframes in which the data packet is transmitted instead of M _DATA in equation (8).

If the Gap 3 ′ interval is shorter than the reception processing time necessary to transmit the HARQ feedback signal after receiving the data packet transmitted by UL, then w = 1, otherwise w = 0.

The HARQ feedback signal for the data packet transmitted in the UL subframe frame number m number j is transmitted in the DL subframe frame number l frame number k . That is, the data packet distribution information and the HARQ feedback signal are transmitted in subframes with the same index. Here j defines k .

When the retransmission of the UL data packet is performed in an asynchronous HARQ scheme, the timing of the retransmission of the UL data packet is indicated by the retransmission pointer contained in the data packet allocation information. Meanwhile, if the retransmission of the data packet over UL is performed in a synchronous HARQ scheme, then the retransmission occurs in subframe number m of frame number p . With reference to Table 4, the frame index p is determined by the UL HARQ transmission offset v (UL HARQ Tx) and the frame index k , in which the HARQ feedback signal is transmitted. If the indices j , k and p of the frames are equal to or greater than the total number N of frames in the superframe, then the index s of the superframe is increased by one, and the indices j , k and p of the frames are values obtained by calculations using modulo operations "which are illustrated in table 4.

Although it has been described above that the HARQ timing diagram is determined using the equations of Tables 1-4, the HARQ timing diagram can be determined by storing a table containing the resulting values according to the equations of Tables 1-4, which correspond to all possible input values ( that is, the number of DL / UL frames, subframe index, processing time, etc.) in the transmitter and in the receiver, and by reading the desired result values from the table.

CALCULATION OF HARQ FEEDBACK SIGNAL SHIFTS AND HARQ TRANSMISSION

The following is a description of embodiments of calculating the shifts w and z of the HARQ feedback signal and the HARQ transmission shifts v and u (HARQ Tx), which are given as examples.

HARQ feedback shifts w and z and HARQ transmission shifts v and u can be determined in accordance with the correspondence relationship between DL subframes and UL subframes, with HARQ operation TTI (data packet or feedback TTI) and / or signal processing performance that the system has (transmitter and / or receiver). In another exemplary embodiment of the present invention, the HARQ feedback shifts may be predetermined and may be transmitted by the system by broadcast instead of computing them using the above information. The shifts associated with the functioning of the HARQ are defined as follows.

At least one of the shifts: the HARQ feedback signal z shift and the HARQ transmission shift u , for the operation of the DL HARQ in the FDD mode, are calculated according to the following equations:

,

(10)

,

(10)

обозначает время обработки при приеме (Rx) пакета данных по DL, определяемое производительностью обработки сигналов, которую имеет приемник, а

обозначает время обработки при передаче (Tx) пакета данных по DL, определяемое производительностью обработки сигналов, которую имеет передатчик.

и

могут вместе именоваться временем обработки пакета данных. Обработка пакета данных при приеме (Rx) включает в себя, например, обработку при приеме с множеством входов и множеством выходов (MIMO), демодуляцию и декодирование. Обработка пакета данных при передаче (Tx) включает в себя, например, кодирование, модуляцию, и MIMO-обработку при передаче. В DL HARQ приемником обычно является MS, а передатчиком обычно является BS. Здесь предполагают, что TTI сигнала обратной связи HARQ равен одному подкадру, а временной интервал передачи (TTI) пакета данных представлен как N _TTI.Where

denotes the processing time at reception (Rx) of the DL data packet, determined by the signal processing performance that the receiver has, and

denotes the processing time during transmission (Tx) of a DL data packet, determined by the signal processing performance that the transmitter has.

and

can be collectively referred to as the processing time of the data packet. Reception data packet processing (Rx) includes, for example, multi-input and multi-output (MIMO) reception processing, demodulation, and decoding. Transmission data packet (Tx) processing includes, for example, coding, modulation, and MIMO transmission processing. In DL HARQ, the receiver is usually an MS, and the transmitter is usually a BS. Here, it is assumed that the TTI of the HARQ feedback signal is equal to one subframe, and the transmission time interval (TTI) of the data packet is represented as N _TTI .

At least one of the offsets: the HARQ feedback signal shift w and the HARQ transmission shift v , for the operation of the UL HARQ in the FDD mode, are calculated according to the following equations:

(11)

(eleven)

обозначает время обработки при приеме (Rx) пакета данных по UL, определяемое производительностью обработки сигналов, которую имеет приемник, а

обозначает время обработки при передаче (Tx) пакета данных по UL, определяемое производительностью обработки сигналов, которую имеет передатчик.

и

могут вместе именоваться временем обработки пакета данных. В UL HARQ приемником обычно является BS, а передатчиком обычно является MS. Where

denotes the processing time upon receipt (Rx) of the UL data packet, determined by the signal processing performance that the receiver has, and

denotes the processing time during transmission (Tx) of the UL data packet, determined by the signal processing performance that the transmitter has.

and

can be collectively referred to as the processing time of the data packet. In UL HARQ, the receiver is usually a BS, and the transmitter is usually an MS.

At least one of the offsets: the HARQ feedback signal shift z and the HARQ transmission shift u , for the operation of DL HARQ in TDD mode, are calculated according to the following equations:

(12)

(12)

и

обозначают время обработки пакета данных, передаваемого по DL, соответственно, при приеме (Rx) и при передаче (Tx).

и

могут вместе именоваться временем обработки пакета данных.Where

and

denote the processing time of a data packet transmitted over DL, respectively, at reception (Rx) and transmission (Tx).

and

can be collectively referred to as the processing time of the data packet.

At least one of the shifts: the HARQ feedback signal shift w and the HARQ transmission shift v , for the operation of the UL HARQ in TDD mode, are calculated according to the following equations:

(13)

(13)

и

обозначают время обработки пакета данных, передаваемого по UL, соответственно, при приеме (Rx) и при передаче (Tx).

и

могут вместе именоваться временем обработки пакета данных.Where

and

indicate the processing time of a data packet transmitted over UL, respectively, at reception (Rx) and transmission (Tx).

and

can be collectively referred to as the processing time of the data packet.

из уравнения (11) и

из уравнения (13) могут быть заменены на

и

в зависимости от того, производят ли первоначальную передачу пакета данных или повторную передачу.

представляет собой время обработки при первоначальной передаче пакета данных, а

представляет собой время обработки при повторной передаче пакета данных. Как изложено выше, несмотря на то, что пакет данных при первоначальной передаче закодирован в соответствии с информацией о распределении пакетов данных, пакет данных, повторная передача которого инициирована сигналом NACK, может быть закодирован на основании закодированного пакета данных при первоначальной передаче. Следовательно, сдвиг передачи HARQ может быть отрегулирован с учетом различного времени при передаче для первоначальной передачи и для повторной передачи.In a synchronous HARQ scheme, the transmission processing time during UL HARQ operation is different for initial transmission and retransmission. I.e,

from equation (11) and

from equation (13) can be replaced by

and

depending on whether the initial transmission of the data packet or retransmission.

represents the processing time during the initial transmission of the data packet, and

represents the processing time for retransmission of a data packet. As described above, despite the fact that the data packet during the initial transmission is encoded in accordance with the information about the distribution of data packets, the data packet whose retransmission is initiated by the NACK signal can be encoded based on the encoded data packet during the initial transmission. Therefore, the HARQ transmission shift can be adjusted to take into account different transmission times for the initial transmission and for retransmission.

или

. Инициирование повторной передачи может быть учтено двумя способами. В первом способе передают только сигнал NACK, а во втором способе передают не только сигнал NACK, но и информацию о распределении для повторной передачи.

используют для первого случая, а

используют для второго случая.According to the retransmission initiation scheme, the processing time of the data packet upon retransmission may be equal to

or

. Retransmission initiation can be considered in two ways. In the first method, only the NACK signal is transmitted, and in the second method, not only the NACK signal is transmitted, but also distribution information for retransmission.

used for the first case, and

used for the second case.

обработки при передаче, а v_RxTx представляет собой сдвиг передачи HARQ по UL (UL HARQ Tx) для пакета данных при повторной передаче с учетом времени

обработки при повторной передаче.Similarly, UL HARQ transmission shifts (UL HARQ Tx) described in Table 2, Table 4, Equation (11) and Equation (13) can be individually adjusted as v _new and v _RxTx according to time Transmission processing for the initial transmission or for retransmission. v _new is the UL HARQ Tx HARQ transmission offset for the data packet in the initial timed transmission

processing during transmission, and v _RxTx is the UL HARQ Tx transmission HARQ for the data packet in the retransmission based on time

retransmission processing.

REGIME PROVIDING SUPPORT FOR OUTDOOR SYSTEMS

A wireless mobile communication system using the advanced IEEE 802.16m radio interface (AAI) developed by the Institute of Electronics and Electronics Engineers (IEEE) can coexist with an outdated IEEE 802.16e wireless communication system by using a predetermined frame offset in the structure superframe. In particular, each frame of the 16m standard includes a frame offset along with DL subframes and with UL subframes to compensate for non-compliance with the 16e frame. In this case, the structures of the HARQ timing diagrams in TDD mode are configured based on the HARQ timing diagrams described in Table 3 and Table 4 in accordance with the DL: UL ratio for the period of time during which the network node and the MS operate in the mode IEEE 802.16m.

The correspondence relationship between DL and UL subframes is determined in accordance with the DL: UL ratio for a period of time during which the network node and the MS operate in IEEE 802.16m mode. In other words, the indices and the number of subframes in transmission periods for HARQ operation are determined in accordance with the DL: UL ratio. However, due to the coexistence of the IEEE 802.16e mode and the IEEE 802.16m mode in one frame, the frames are not indexed in accordance with the DL: UL ratio for a period of time in 16m mode, but in accordance with the full DL: UL ratio for a system operating in TDD mode .

Let the number of DL subframes and the number of UL subframes for a system operating in TDD mode be denoted respectively by D ' and U' . The indices l ' , m' and n 'of the subframes are numbered in accordance with the DL: UL ratio for a system operating in a mode, i.e., D' : U ' . In addition, let the number of DL subframes and the number of UL subframes in the period of operation in the 16m mode are denoted, respectively, as D and U. In this case, the indices l ' , m and n of the subframes are numbered in accordance with the DL: UL ratio in the period of operation in the 16m mode equal to D : U.

For a period of time in 16m mode other than the period of time in legacy mode 16e, the HARQ timing diagrams are in accordance with Table 3 and Table 4. However, the frame indices i , j and k , determined in accordance with the offset z or w of the feedback signal HARQ communications and with a shift of u or v , HARQ transmissions are numbered using indices l ' , m' , n 'of subframes according to D' : U ' .

FIG. 7 illustrates a structure of a HARQ timing diagram for transmitting DL data packets in TDD mode of 5: 3 when two different systems coexist according to an exemplary embodiment of the present invention.

With reference to FIG. 7, two DL subframes and a frequency division multiplexing (FDM) area in UL are allocated for a mode providing support for legacy systems (i.e., a mode providing support for legacy systems), and in other communication periods, except for those which are designed for a mode that supports legacy systems, subframes are reindexed. In particular, in the entire system operating in TDD mode, there are DL subframes from number 0 to number 4. Therefore, DL subframes number 2, number 3 and number 4 are renumbered, respectively, as subframes number 0, number 1 and number 2 in the interval operating time in 16m mode. And when using FDM, the time span allocated for UL transmission coexists with the time span for DL transmission, and the time span in 16m mode covers the entire time span for UL transmission. Therefore, a frame in 16m mode ultimately includes three DL subframes and three UL subframes.

With reference to FIG. 7, since D = 3 and U = 3, then K = 0, D ' is 5, and U' is 3. When transmitting a HARQ data packet over DL in TDD (TDD DL HARQ) mode, distribution information data packets and a data packet are transmitted in the subframe DL number 0 of the frame number i . The HARQ feedback signal for the data packet is transmitted in UL subframe number 0 of frame number i . The retransmission of the HARQ data packet occurs in the DL subframe number 0 of the frame number ( i +1), and the HARQ feedback signal for the retransmitted data packet is transmitted in the UL subframe frame number 0 of the frame number ( i +1). In the case illustrated in FIG. 7, it is believed that each processing time: processing time in transmission and processing time in reception is two subframes.

FIG. 8 illustrates the structure of a HARQ timing diagram for transmitting UL data packets in TDD mode of 5: 3 in the case of the coexistence of two different systems according to an exemplary embodiment of the present invention.

With reference to Fig. 8, since D = 3 and U = 3, according to the frame structure of Fig. 7, K = 0. When transmitting a HARQ data packet over UL in TDD mode (TDD UL HARQ), information about the distribution of data packets is transmitted in the DL sub frame 0 frame number i , and the data packet transmitted on the UL is transmitted in the UL sub frame 0 frame number i in accordance with information about the distribution of data packets. The HARQ feedback signal for the UL transmitted data packet is transmitted in the DL subframe number 0 of the frame number ( i +1), and the UL packet data packet is retransmitted in the UL subframe number 0 of the frame number ( i +1). In DL subframe number 0, data packet allocation information may be transmitted indicating UL data packet transmission. In the case illustrated in FIG. 8, it is believed that each processing time: processing time in transmission and processing time in reception is two subframes.

The resources used in the IEEE 802.16e wireless communication system are allocated for the time interval corresponding to the frame shift in FIG. 7 and FIG. 8.

The HARQ timing diagram structures proposed in the form of tables from Table 1 to Table 4 are set in accordance with the index of the subframe in which information about the distribution of data packets is transmitted, or with the index of the subframe in which transmission of the data packet begins, regardless of the TTI of the packet data. Therefore, since in a synchronous HARQ scheme, the HARQ feedback signal is transmitted periodically in a predetermined subframe, the receiver saves energy, which could otherwise be used to track the reception of the HARQ feedback signal, and provides efficient support for the coexistence of systems in the same place (CLC).

LONG TIME TRANSMISSION INTERVAL (TTI)

In another embodiment of the present invention, which is given as an example, when a data packet occupies two or more subframes, that is, when using a long TTI, then the HARQ feedback waveform can be determined in accordance with the index of the subframe at which the transmission ends data packet, instead of the subframe index at which the transmission of the data packet begins, to provide support for the earlier ACK timing relative to the HARQ timing structures described in t tables 1 to table 4. This timing solution can be used to provide an earlier ACK timing chart, typically in an asynchronous HARQ scheme.

The HARQ feedback signal timing diagram set in Table 1 is adjusted as follows. The subframe and frame indices in which the HARQ feedback signal is transmitted are determined based on the index m ′ (= m + N _TTI −1) of the last TTI subframe instead of the index m of the first TTI subframe.

FIG. 9 illustrates a structure of a HARQ timing diagram for transmitting data packets over DL in FDD mode according to another exemplary embodiment of the present invention. Here, it is assumed that N _TTI = 4, F = 8, each of the transmission processing time and reception processing time is three subframes or less, the shift z of the DL HARQ feedback signal is 0 and the shift U of the HARQ transmission on DL (DL HARQ Tx) is 0.

With reference to FIG. 9, data packet distribution information transmitted in DL subframe number 1 of frame number i indicates transmission of a data packet on DL to the TTI 900 of DL subframes from number 1 to number 4 in frame number i . The HARQ feedback signal for a DL data packet is transmitted in frame number 910 indicated by UL subframe number 0 frame number ( i +1), which is mapped to the fourth DL subframe of frame number i , in which DL data packet transmission is completed. That is, n = 0 (= ceil (1 + 4-1 + 4) mod8) and j = i +1 (= ( i + floor ( ceil (1 + 4-1 + 4) / 8) mod4)). In the synchronous HARQ scheme, the transmission of the data packet 920 begins at the same location of the subframe as the transmission of the previous data packet, that is, in the DL subframe, frame number 1, frame number is ( i + 2).

As described above, the HARQ feedback signal timing charts can be determined according to the index m ′ of the last of one or more subframes in which the data packet is transmitted, instead of the index m of the first of the subframes in Table 1 and Table 2.

Similarly, in the structure of the timing diagram of the operation of DL HARQ in TDD mode, the timing diagram of the HARQ feedback signal can be determined by applying in table 3 the index m ′ (= m + N _TTI -1) of the last subframe in which the data packet is transmitted instead of the index m of the first subframe of the data packet to obtain an early ACK timeline.

10 illustrates a structure of a HARQ timing diagram for transmitting data packets over DL in TDD mode according to another exemplary embodiment of the present invention. Here, the assumption is made that N _TTI = 4, D = 4, U = 4, each of the processing time for transmission and the processing time for reception is three subframes or less, K = 0 and z = 0.

With reference to FIG. 10, data packet distribution information transmitted in DL subframe number 0 of frame number i indicates the transmission of a data packet on DL to the TTI of 1000 DL subframes from number 0 to number 3 in frame number i . The HARQ feedback signal for the data packet transmitted over DL is transmitted in the position number 1010 indicated by the UL subframe number 3 frame number i , which is assigned to the DL subframe number 3 frame number i according to table 3. That is, n = 0 (= 3- 0) and j = i (= ( i +0) mod4). In the synchronous HARQ scheme, the retransmission of the data packet 1020 after the HARQ feedback signal begins at the same location of the subframe as the transmission of the previous data packet, that is, in the DL subframe, frame number 0, frame number ( i + 2).

However, in the structure of the timing diagram of the HARQ operation in TDD mode for a long TTI, the timing diagram of the HARQ feedback signal is determined differently in accordance with the DL: UL ratio and the processing / transmission time. As an example, the following is a description of the HARQ feedback signal timing diagram for a long TTI (5 subframes) when the DL HARQ is in TDD mode of 5: 3 when the transmit / receive processing time is 3 subframes and the TTI covers the entire gap time allocated for DL transmission.

If the timing diagram of the HARQ feedback signal is set in accordance with the start of the transmission of the data packet, then the HARQ feedback signal for the data packet, the transmission of which begins in the DL subframe number 0, is transmitted in the UL subframe number 0 of the next frame. On the other hand, if the timing diagram of the HARQ feedback signal is set in accordance with the end of the transmission of the data packet, then the HARQ feedback signal for the data packet whose transmission ends in the DL subframe 4 is transmitted in the UL subframe 3 of the next frame. Thus, when a long TTI is used in DL HARQ in TDD 5: 3 mode, an earlier HARQ feedback signal timing diagram for the long TTI is provided because it is determined based on the start of transmission of the data packet, rather than based on the end of the transmission of the data packet.

As another example, a description will be made of a HARQ feedback signal timing diagram for a long TTI of 4 subframes in DL HARQ in 4: 4 TDD mode.

If the timing diagram of the HARQ feedback signal is set in accordance with the start of the transmission of the data packet, then the HARQ feedback signal for the data packet, the transmission of which begins in the DL subframe number 0, is transmitted in the UL subframe number 0 of the next frame. On the other hand, if the timing diagram of the HARQ feedback signal is set in accordance with the end of the transmission of the data packet, then the HARQ feedback signal for the data packet whose transmission ends in the fourth DL subframe is transmitted in the UL subframe number 3 of the next frame. Unlike DL HARQ in TDD 5: 3 mode, DL HARQ in TDD 4: 4 mode provides an earlier time diagram of the HARQ feedback signal for a long TTI due to the fact that it is determined based on the moment of completion of the transmission of the data packet, and not based on the start of the transmission of the data packet.

Accordingly, in the embodiment of the present invention, which is given as an example, the proper structure of the HARQ timing diagram is selected in accordance with the DL: UL ratio and with the transmission / reception processing time. In particular, when the HARQ feedback signal timing chart is determined according to Tables 1-4, it can be determined based on the index m ' (= m + N _TTI -1) of the last of one or more subframes in which the data packet is transmitted, instead index m of the first of the subframes. Information about the selected structure of the HARQ timing diagram may be communicated, for example, as system information, via a common downlink control channel.

CHANGE HARQ FEEDBACK SIGNAL SHIFTS AND HARQ TRANSMISSION SHIFTS

The following is a description of other embodiments of the TD HALQ DL HARQ and UL HARQ timing diagram structures, which are given as examples. In particular, a description will be made of a change in HARQ feedback signal shifts and HARQ transmission offsets in accordance with the position of a subframe in which a data packet is transmitted on DL or UL.

11 and 12 illustrate HARQ timing diagram structures when N _A-MAP = 1 and D + U = 8.

Figure 11 illustrates the structure of the timing diagram of the operation of HARQ in the case when D : U = 5: 3 and TTI is equal to one subframe. With reference to FIG. 11, when the transmission / reception processing time is 2 subframes, the HARQ / HARQ transmission feedback signal offset is 0. That is, since the transmission of each DL subframe can be completely processed for two subframes (since the Gap 3 and Gap 4 exceed 2), the corresponding UL transmission occurs in the next time interval allocated for UL transmission, without a time delay. Similarly, the transmission of each UL subframe can be completely processed for two subframes (since the intervals Gap 3 and Gap 4 are greater than 2), and therefore, the corresponding DL transmission occurs in the next time interval allocated for DL transmission without time delay .

However, if the transmit / receive processing time is 3 subframes, then the UL HARQ (HARQ UL Tx) transmission diagram associated with DL subframe 4 has a delay of one frame. This is because although the transmission processing of DL subframe number 4 takes up 3 subframes, it is difficult to transmit uplink (UL) transmission within 2 subframes (= 5-4-1 + 2), which are the interval to the corresponding UL subframe number 2. As a result, UL transmission in UL subframe 2 corresponding to DL subframe 4 has a delay of one frame and, therefore, it occurs in UL subframe 2 of the next frame number ( i +1).

On Fig illustrates the structure of the timing diagram of the operation of the HARQ in the case when D : U = 3: 5 and TTI is equal to one subframe. With reference to FIG. 12, when the transmission / reception processing time is 2 subframes, the shift of the HARQ / HARQ transmission feedback signal is 0. However, if the processing / transmission time of the transmission / reception is 3 subframes, then the interval Gap = 3-0- 1-0 = 2. Therefore, the UL HARQ transmission timing diagram (UL HARQ UL Tx) in the UL subframe 0 associated with the DL subframe 0 has a delay of one frame. Since the interval Gap = 5-4-1 + 2 = 2, the DL transmission timing in the DL subframe 2 associated with the UL subframe 4 has a delay of one frame. This is because each Gap is shorter than the processing time for transmission or reception.

13 illustrates HARQ timing diagram structures when D + U = 7.

13 (a) illustrates the structure of the HARQ timing diagram in the case where D : U = 4: 3, N _A-MAP = 1, and TTI is one subframe. With reference to FIG. 13 (a), when the transmission / reception processing time is 2 subframes, then the shift of the HARQ / HARQ transmission feedback signal is 0. If the processing / transmission time is 3 subframes, then the HARQ transmission timing of UL (HARQ UL Tx) for subframe number 2 corresponding to subframe DL number 3 has a delay of one frame, because the interval Gap = 4-3-1 + 2 = 2.

13 (b) illustrates the structure of the HARQ timing diagram in the case where D : U = 3: 4, N _A-MAP = 1, and the TTI is one subframe. Since D + U is equal to an odd number and D < U , K _c (= -1) is used, based on the function ceil (). With reference to FIG. 13 (b), when the transmit / receive processing time is 2 subframes, then the shift of the HARQ / HARQ transmission feedback signal is 0. If the transmit / receive processing time is 3 subframes, then the HARQ transmission timing of UL (HARQ UL Tx) for the UL subframe number 0 corresponding to the DL subframe number 3 has a delay of one frame.

On Fig illustrates the structure of the timing diagrams of the functioning of the HARQ when N _A-MAP = 1 and D + U = 6.

14 (a) illustrates the structure of a HARQ timing diagram in the case where D : U = 4: 2 and the TTI is one subframe. With reference to FIG. 14 (a), when the transmission / reception processing time is 2 subframes, the UL HARQ transmission timing associated with the DL subframe 3 has a delay of one frame. If the transmit / receive processing time is 3 subframes, the DL HARQ Tx timing diagram associated with UL subframe number 0 has a delay of one frame and the UL HARQ transmission timing diagrams associated with DL subframes number 1 and number 2 have a delay of one frame. In addition, the UL HARQ transmission timing associated with DL subframe number 3 has a delay of one frame.

Fig. 14 (b) illustrates the structure of the HARQ timing diagram when D : U = 3: 3 and the TTI is one subframe. With reference to FIG. 14 (b), when the transmission / reception processing time is 2 subframes, then the HARQ / HARQ transmission feedback signal shift is 0. However, if the transmission / reception processing time is 3 subframes, then the reverse signal shift HARQ communication / HARQ transmission is 1, which means a delay of one frame.

RELAY STRUCTURE

A description will now be made of the structures of the HARQ timing diagrams in a wireless mobile communication system supporting a relay structure.

When relay structure support is provided, the BS and MS communicate directly with each other or through at least one relay station (RS). The RSs between the BS and the MS are subdivided into RSs of odd-numbered transit network sections and RSs of even-numbered transit network sections. Each RS includes a controller for determining the HARQ transmission time in accordance with the frame structure and the HARQ timing diagram described below, and at least one transmitter / receiver for transmitting and receiving data packet distribution information, data packet and a HARQ feedback signal at times that are controlled by the controller. A data transfer is a data transfer between a BS and RS or a data transfer between RS and MS.

Below, a description will be made of the structure of a HARQ timing diagram for operating RS and MS in 16m mode in an example embodiment of the present invention.

FIG. 15 illustrates a frame structure for a wireless mobile communication system supporting a relay structure according to an example embodiment of the present invention.

With reference to FIG. 15, a BS frame 1410 may include at least one of the following zones: a DL 1412 access area in which the BS is transmitted directly to the MS, a DL transmission zone 1414 in which the transmission is made from BS to MS or to RS, network-encoded reception zone 1416, UL access zone 1418 in which reception is received from the MS, and UL reception zone 1420 in which reception is received from the MS or from RS. Between the transmission zones 1412 and 1414 and the reception zones 1416, 1418 and 1420, there is an interval 1422 for the transition from transmission to reception.

The RS frame 1430 of the odd network transit section includes a DL access area 1432 in which transmission is transmitted to the MS, DL transmission zone 1434, in which the even transit network section is transmitted to the MS or RS, the DL reception zone 1444, which receive reception from RS of an even transit network section or from BS, a network-encoded transmission zone 1438, UL reception zone 1440, in which an even transit network section is received from MS or from RS, and UL transmission zone 1442, in which transmission in RS of an even transit section of the network or in BS. Between the transmission zone 1434 and the reception zone 1436, between the reception zone 1436 and the transmission zone 1438, and between the reception zone 1440 and the transmission zone 1442, there are intervals 1444, 1446, and 1448 for the transition between transmission and reception.

An RS frame 1450 of an even transit network section includes a DL access area 1452 in which a transmission is made to the MS, a DL reception area 1454 in which an odd network transit section of a RS is received from an RS, DL transmission zone 1456 in the MS or in the RS of the odd network transit section, the network-encoded reception zone 1458, the UL transmission zone 1460, in which the odd network transmission section is transmitted to the RS, and the UL reception zone 1462, in which the MS or RS is received odd transit network section. Between the transmission zone 1452 and the reception zone 1454, between the reception zone 1454 and the transmission zone 1456, between the transmission zone 1456 and the reception zone 1458, and between the transmission zone 1460 and the reception zone 1462 there are intervals 1464, 1466, 1468 and 1470 for the transition between transmission and reception.

As described above, in the structure of the HARQ timing diagram for zones in which at least one RS communicates with the MS, the correspondence relation between the UL and DL subframes according to the subframe indices is determined in accordance with the DL: UL ratio of the zones in which at least one RS exchanges information with the MS in the frame of the corresponding RS, and the frame indices are determined in accordance with the subframe indices, as in the HARQ operation described above for the mode supporting legacy systems.

FIG. 16 illustrates TDD mode relay station frame structures (RS) according to exemplary embodiments of the present invention. 16, TDD frames have a DL: UL ratio of 4: 4 ( D ' : U' = 4: 4), and network-encoded transmission / reception zones are not shown.

With reference to FIG. 16 (a), in frame number i used for the RS odd-numbered network leg, the RS odd-numbered network leg transmits DL number 0, number 1, and number 2 to the MS or lower-level RS, and receives another DL subframe from BS. The odd-numbered network leg RS receives the UL subframes number 0 and number 1 transmitted from the MS, and transmits the other two UL subframes to the higher layer RS or to the BS.

With reference to FIG. 16 (b), in frame number i used for the RS even transit network section, the RS of the even transit network section transmits to the MS a subframe DL number 0 at the beginning and a subframe DL number 1 at the end of the time allotted for transmission on DL, and receives two middle DL subframes from RS of an odd higher-level network backhaul. The RS of the even transit network section from the MS receives the UL subframes number 0 and number 1 at the end of the time interval allocated for UL transmission, and transmits the other two UL subframes at the beginning of the time interval allocated for transmission over the RS of the odd transit network section of the higher level network UL

17 illustrates HARQ timing diagram structures for an RS of an odd network backhaul according to embodiments of the present invention, which are given as examples. On Fig D: U = 3: 2.

On Fig (a) illustrates the structure of the timing diagram of the functioning of the HARQ taking into account K _f . With reference to FIG. 17 (a), the UL HARQ transmission timing corresponding to DL subframe number 2 has a delay of one frame.

On Fig (b) illustrates the structure of the timing diagram of the functioning of the HARQ taking into account K _c . With reference to FIG. 17 (b), each of the UL HARQ timing diagrams corresponding to the DL subframes No. 1 and No. 2 has a delay of one frame.

FIG. 18 illustrates a structure of a HARQ timing diagram for RS of an even transit network portion according to an exemplary embodiment of the present invention. On Fig D: U = 2: 2. From Fig. 18 it can be seen that the HARQ DL transmission schedule (HARQ DL Tx) corresponding to UL subframe number 0 has a delay of one frame.

As described above, it may be necessary to select a value of K in accordance with the DL: UL ratio and the transmission / reception processing time to provide an earlier HARQ timing diagram. The system operator can select the appropriate HARQ timing diagram structure and the appropriate K value in accordance with the system configuration information, for example, in accordance with the DL: UL ratio and the transmission / reception processing time, and the system configuration information is transmitted via a common downlink control channel .

HARQ TEMPORARY STRUCTURES FOR LONG TTI

The following is a description of the HARQ timing diagram structures based on the distribution information for the long TTI with reference to Table 3 and Table 4.

In DL HARQ, if data packet distribution information indicating transmission of a data packet with a long TTI is transmitted in a specific DL subframe, then transmission with a long TTI is performed in DL subframe number 0 of the next frame. The HARQ feedback signal for long TTI transmission is transmitted in a UL subframe mapped to a DL subframe (that is, in which data packet allocation information is transmitted) of the next frame. In UL HARQ, if the long TTI transmission indicated by the packet data allocation information transmitted in a particular DL subframe is not in the same frame, then the UL TAR transmission data packet with long TTI is transmitted in the UL subframe number 0 of the next frame, and the HARQ feedback signal for the data packet transmitted over UL is transmitted in DL subframes having the same index in the DL subframe (that is, in which data packet distribution information is transmitted) of the next frame. And the frame indices are determined using the aforementioned HARQ transmission offset and the aforementioned HARQ feedback signal shift. For example, when the information about the distribution of data packets transmitted in the subframe number l ( l is not equal to zero) indicates the transmission on DL of a data packet with a long TTI, which covers the entire period of time allocated for transmission on DL ( N _TTI = D ), then packet transmission begins in DL subframe number 0. However, if information about the distribution of data packets on DL subframe number l , where l is not 0, indicates transmission with a long TTI, then the data packet transmitted over DL is not transmitted in the same frame , and believe that information about the distribution of data packets is an indication Sends a long TTI in the next frame.

With reference to Table 3 for DL HARQ, data packet allocation information transmitted in DL subframe number l of frame number i indicates transmission of a data packet in DL subframe number m in accordance with N _A-MAP . However, in the case of transmission with a long TTI, the start of transmission of the data packet is determined in accordance with the index m of the DL subframe and with the TTI of the data packet, N _TTI . Therefore, the transmission with the long TTI begins in the DL subframe number h of the frame number a , and the HARQ feedback signal for transmission with the long TTI is transmitted in the UL subframe number f of the frame number b . If the UL HARQ feedback signal is a NACK signal, then the data packet is retransmitted in the DL subframe number h or in the next subframe of the frame number c . The frame indices a , b and c and the subframe indices h and f are determined in accordance with the indices i , l and m obtained from the data packet allocation information, with the UL subframe index n , the corresponding indices i , l and m , and with N _TTI in the following way.

If D is m ≥ N _TTI , then the transmission with the long TTI indicated by the packet allocation information starts in the subframe frame number m of frame number i , and therefore a = i and h = m . On the other hand, if Dm < N _TTI , then the remaining period of the DL frame is less than N _TTI , and accordingly, the data packet cannot be transmitted in frame number i . Therefore, transmission with a long TTI begins in subframe number 0 of frame number ( i +1), and a = i +1 and h = 0.

In order to avoid the concentration of UL HARQ feedback signals in a particular UL subframe, the index f of the UL subframe in which the UL HARQ feedback signal for the data packet is transmitted is determined in accordance with the index l of the DL subframe in which the data packet allocation information is transmitted. The relationship between l and f follows from the relationship between m and n given in Table 3. Accordingly, the UL HARQ feedback signal is transmitted in the next frame, and therefore b = a +1 (= i +2).

For example, if in the structure in TDD mode 5: 3 N _TTI = 5, N _A-MAP = 1, K = 1 and the processing time for transmission / reception is 3, then the transmission with a long TTI indicated by the information about the distribution of data packets transmitted in subframe DL number 2 ( l = 2) of frame number i , begins in subframe DL number 0 ( h = 0) of frame number ( i +1) ( a = ( i +1)), since D is m (5- 2) < N _TTI (= 5), and the UL HARQ feedback signal for the data packet is transmitted in the UL subframe number 1 ( n = 2-1) of the frame number ( i +2) ( b = ( i +2)).

In another example, if, when transmitting over DL DL in TDD mode, the long TTI covers the entire time allotted for DL DL transmission, then the transmission of a data packet always starts in DL subframe number 0. In this system, when the information about the distribution of data packets in DL subframe number l indicates DL transmission with a long TTI, then if l = 0, the indices m and n of the subframes and frame index j for HARQ operation are calculated in Table 3. Otherwise, if l ≠ 0, then information about the distribution of data packets indicates that data packet transmission begins at dkadre number frame number 0 (i +1), which is followed by the frame number i. The HARQ feedback signal for the data packet is transmitted in subframe number n of frame number j . Here, n and j are calculated according to equation (14), and not according to table 3. That is, the location ( n , j ) at which the HARQ feedback signal is transmitted is determined based on the index l of the subframe in which information about the distribution of data packets is transmitted, and index ( j +1) of the frame in which the data packet is transmitted.

(14)

(fourteen)

where m = 0 and N _TTI = D. Therefore, z is calculated according to equation (15) by substituting 0 and D instead of, respectively, m and N _TTI in equation (12). Here, n is determined based on the index l of the DL subframe in which information about the distribution of data packets is transmitted.

(15)

(fifteen)

With reference to Table 4 for UL HARQ, the data packet allocation information transmitted in the DL subframe number l of frame number i indicates that transmission of the data packet begins in UL subframe number m of frame number j in accordance with N _A-MAP and with the index l DL subframe. In the case of transmission with a long TTI, the start of transmission of the data packet is determined in accordance with the index m of the UL subframe and with the TTI of the data packet, N _TTI . Therefore, the transmission with the long TTI begins in the DL subframe number h of the frame number a , and the HARQ feedback signal for transmission with the long TTI is transmitted in the DL subframe number f of the frame number b . If the DL HARQ feedback signal is a NACK signal, then the retransmission of the data packet occurs in the UL subframe number h of frame number c . The indices a , b and c of the frames and the indices h and f of the subframes are determined in accordance with the indices i and l of the frame and the subframe in which information about the distribution of data packets is transmitted, with the indices j and m of the frame and the UL subframe corresponding to the indices i and l , and with N _TTI as follows.

If U - m ≥ N _TTI , then j becomes equal to i , the transmission with a long TTI indicated by the packet distribution information begins in the subframe number m of the frame number j , and, accordingly, a = i and h = m . On the other hand, if U - m N _TTI , then j becomes i +1, the remaining period of the UL frame is less than N _TTI , and accordingly, the data packet cannot be transmitted in frame number i . Therefore, the transmission with a long TTI begins in the UL subframe number 0 of the frame number ( i +1) and, accordingly, a = i +1 and h = 0. Since the DL HARQ feedback signal is transmitted in the DL subframe number l , then f = 1. With reference to equation (13), if U - h - N _TTI + 1≥ = Rx_Time 4, then the DL HARQ feedback signal is transmitted in the frame number b ( b = ( a +1)). If U - h - N _TTI +1 < Rx_Time 4, then the feedback signal DL HARQ is transmitted in the frame number b ( b = ( a +2)). If the DL HARQ feedback signal is a NACK signal, then retransmission begins in the UL subframe, frame number h, number c . Similar to calculating the frame index a , if a = i , then c = b . If a = i +1, then c = b +1.

For example, if in the structure in TDD 5: 3 mode, N _TTI = 3, N _A-MAP = 1, and the transmission / reception processing time is 3, then the transmission of the data packet by UL indicated by the information about the distribution of data packets in the DL subframe number 2 frames number i , starts in the subframe UL number 0 ( h = 0) of the frame number ( i +1) ( a = ( i +1)), since U - m (3-1) < N _TTI (= 3), and the DL HARQ feedback signal for the data packet is transmitted in the UL subframe, frame number 2 ( f = 2) of frame number ( i +2) ( b = ( i +2)). If the DL HARQ feedback signal is a NACK signal, then retransmission occurs in the UL subframe number 0 of frame number ( i +3), i.e. ( b + 1 = i +3), similarly to the calculation of a = i +1 based on that the HARQ transmission shift is 1.

In another example, if when transmitting on UL in TDD mode, the long TTI covers the entire time allotted for UL transmission, then the transmission of a data packet always starts in UL subframe number 0. In this system, when information about the distribution of data packets in DL subframe number l indicates UL transmission with a long TTI, then the transmission of the data packet corresponding to the subframe with index l starts in subframe number 0 of frame number j ( m = 0). The HARQ feedback signal for the data packet is transmitted in subframe DL frame number l of frame number k . If the HARQ feedback signal is a NACK signal, then the HARQ retransmission begins in the UL subframe number 0 of the frame number p . The frame indices j , k and p are calculated according to the equations given in Table 4 using the HARQ transmission shift v and the HARQ feedback signal shift w , which are determined taking into account that m = 0.

In FDD mode, DL subframes and UL subframes follow one after another in their respective different frequency bands. Thus, a transmission with a long TTI can be started in any subframe. However, if the start time of a transmission with a long TTI is limited to a particular subframe due to implementation complexity or any other factor, then control information (e.g., resource allocation information and HARQ feedback information) may be concentrated in a particular subframe, as in TDD mode. Accordingly, in FDD mode, reconfiguration of the HARQ timing diagram is necessary, similar to how it is done in TDD mode.

If the start time of transmission with a long TTI is limited to a specific DL subframe, namely, DL subframe number x for DL HARQ operation in a system operating in FDD mode, then the following HARQ timing diagram may be considered. A long TTI transmission includes at least one DL subframe (x ₁ , x ₂ , ..., x _max ). Here N _A-MAP is 1. That is, when the information about the distribution of data packets transmitted in the DL subframe number l ( l ≠ x ) indicates a transmission with a long TTI, then the transmission with a long TTI begins in a DL subframe, which allows transmission with a long TTI after subframe number l .

In the case described above, if the information about the distribution of data packets transmitted in the DL subframe number l indicates DL transmission with a long TTI, and l = x , then the subframes indices m and n and the frame index j for HARQ operation are calculated according to Table 1. Otherwise, if l ≠ x, then the transmission of the data packet begins in frame number m . The HARQ feedback signal for the data packet is transmitted in subframe number n of frame number j . Here, the indices m , n and j are determined according to equation (16), and not Table 1. That is, the location ( n , j ) of the HARQ feedback signal is determined based on index l of the DL subframe, in which information about the distribution of data packets, index x subframe and index of the frame in which the data packet is transmitted.

,

,

(16)

обозначает подкадр номер x _n кадра номер i, и l=0,1,…,F-1.Where

denotes a subframe number x _{n of the} frame number i , and l = 0,1, ..., F -1.

For example, if the TTI transmission start time is limited to DL subframes 0 and 4, F = 8, N _TTI = 4, and the transmission / reception processing time is 3 subframes, then the long TTI transmission indicated by the data packet allocation information in the subframe DL number 1, number 2 or number 3 (i.e., x ₂ = 4) of frame number i starts in a subframe DL number 4 of frame number i ( m = 4), and the HARQ feedback signal for transmission with a long TTI is transmitted in a subframe UL number n frame number ( i +1). Here n takes values in the range from 5 to 7. Here the value ( ceil (8/2) -4 + 3) is equal to or greater than 3, and therefore z = 0. In addition, the transmission with a long TTI indicated by the information about the distribution of data packets in DL subframes from number 5 to frame number 7 of frame number i starts in frame subframe DL number 0 of frame number ( i +1) ( m = 0), and the signal HARQ feedback for transmission with a long TTI is transmitted in the UL subframe, frame number n, number frame number ( i + 2). Here n takes values in the range from 1 to 3. Here, the value ( ceil (8/2) -4-5) is less than 3, and therefore z = 1.

In UL HARQ in FDD mode (FDD UL HARQ), if the start time of transmission with a long TTI is limited to a specific UL subframe, namely, UL subframe number y for operating UL HARQ in a system operating in FDD mode, the following HARQ timing diagram may be considered . A long TTI transmission includes at least one UL subframe ( y ₁ , y ₂ , ..., y _max ).

In the case described above, if the information about the distribution of data packets transmitted in the DL subframe number l indicates UL transmission of a long TTI and n = y , then the subframe index m and the frame index j for HARQ operation are calculated according to Table 2. Otherwise, if n ≠ y , then the transmission of this data packet begins in the UL subframe number m . That is, information about the distribution of data packets indicates the transmission of the data packet in the subframe UL frame number m frame number j . The HARQ feedback signal for the data packet is transmitted in subframe DL frame number l of frame number k . If the HARQ feedback signal is a NACK signal or if the resource allocation for the retransmission is indicated, then the retransmission according to the HARQ begins in the subframe number m of the frame number p . Here, the indices m , j , k and p are determined according to equation (17) and not Table 2. That is, the location ( m , j ) of the HARQ feedback signal is determined based on the index l of the DL subframe, in which information about the distribution of data packets is transmitted, index y of the subframe and index i of the frame in which the data packet is transmitted.

The frame indices j , k and p are calculated according to the equations given in Table 2, using the HARQ transmission shifts v and w and the HARQ feedback signal, which are determined taking into account that m = 0.

,

, (17)

обозначает подкадры с номерами y _n кадра номер i, а l=0,1,…,F-1.Where

denotes subframes with numbers y _{n of} frame number i , and l = 0,1, ..., F -1.

For example, if the start time of TTI transmission is limited by UL subframes number 0 and number 4 (i.e., y ₁ = 0, y ₁ = 4), F = 8, N _TTI = 4 and the processing / transmission time is 3 subframes, then transmission with a long TTI indicated by information about the distribution of data packets in the DL subframe number 1, number 2 or number 3 (that is, since 1≤ l ≤3, 5≤n≤7) of frame number i , begins in the UL subframe frame number 0 number ( i +1), and the HARQ feedback signal for transmission with a long TTI is transmitted in the DL subframe number 1, number 2, or frame number 3 frame number ( i +2). Here, the value of ( ceil (8/2) -1 + 0- n ) is less than 3, and therefore v = 1. Since the value of ( floor (8/2) -4+ n -0) is equal to or greater than 3, then w = 0. In addition, the transmission with a long TTI indicated by the information about the distribution of data packets in the DL subframe number 5, number 6 or number 7 (that is, since 5 l l 7 7, 1 n n 3 3) of frame i , starts at UL subframe number 4 of frame number ( i +1) ( m = 4), and the HARQ feedback signal for transmission with a long TTI is transmitted in subframe number l ( l is one of the numbers 5, 6 and 7) of frame number ( i +2 ) If the HARQ feedback signal is a NACK signal, and the resource allocation for the retransmission is indicated, then the retransmission according to the HARQ begins in the UL subframe number 4 of the frame number ( i +3). Since the value of ( ceil (8/2) -1 + 4- n ) is equal to or greater than 3, then v = 0. Since the value of ( floor (8/2) -4+ n -4) is less than 3, then w = 1.

In another embodiment of the present invention, which is given as an example, if information about the distribution of data packets is transmitted in each DL subframe, then N _A-MAP = 1. Therefore, Tables 1 through 4 are respectively modified into Tables 5 through 8. The tables below can be used to determine the timing of transmission of at least one of the following data: A-MAP protocol information that defines resource allocation with allocation information data packets, a HARQ subpacket in which a data packet, a HARQ feedback signal (ACK or NACK), and a subpacket retransmitted according to HARQ are transmitted. However, it should be understood that these tables should not be construed as limiting the present invention.

Table 5 Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE) defining resource allocation transmitted over DL l i DL transmitted HARQ subpacket m = l i HARQ Feedback in UL

DL HARQ subpacket (Intelligent HARQ (SHARQ)) m

Table 6 Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE) defining resource allocation transmitted over DL l i UL HARQ Subpacket

HARQ Feedback in DL l

UL HARQ Subpacket m

Table 7 Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE) defining resource allocation transmitted over DL l i UL HARQ Subpacket

i HARQ Feedback in DL

UL HARQ Subpacket l

Table 8 Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE) defining resource allocation transmitted over DL l i UL HARQ Subpacket

HARQ Feedback in DL l

UL HARQ Subpacket m

For example, when each superframe includes four frames, as illustrated in FIG. 1, in tables 5 through 8, N is 4. If D is U in the line “HARQ feedback signal in UL” from table 7 or in the line “subpacket HARQ transmitted by UL "from table 8, then n has equality regardless of the above equations. That is, n = m - k .

According to a modified embodiment of the invention, the transmitter and the receiver have at least one table containing the resulting values that correspond to all possible input values according to the equations from tables 4-8 or from tables 9-12, and they can read the resulting values that correspond to the current input values for determining the HARQ timing chart. In one example, the input values are a subframe index and a frame index in which the A-MAP protocol information element (A-MAP IE) determining resource allocation is transmitted via DL.

According to a modified embodiment of the present invention, the following Tables 9 to 12 can be used to determine HARQ timing diagrams using the timing of the transmission of A-MAP protocol information determining resource allocation with information about the distribution of data packets.

Table 9 DL HARQ Timing Diagram in FDD Mode Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE) defining resource allocation transmitted over DL l i DL transmitted HARQ subpacket m = l i HARQ Feedback in UL

Table 10 UL HARQ Timing Diagram in FDD Mode Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE) defining resource allocation transmitted over DL l i UL HARQ Subpacket

HARQ Feedback in DL l

UL HARQ Subpacket m

Table 11 TD HARQ DL HARQ Timing Diagram Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE) defining resource allocation transmitted over DL l i UL HARQ Subpacket m = l i HARQ Feedback in DL

Table 12 UL HARQ TDD Timing Diagram Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE) defining resource allocation transmitted over DL l i UL HARQ Subpacket

HARQ Feedback in DL l

UL HARQ Subpacket m

As yet another exemplary embodiment of the present invention, it can be provided that the UL HARQ timing diagrams described above are applied to channels for which some relationship has been established between resource allocation and UL transmission. For example, in the case of the fast uplink feedback channel, the BS transmits resource allocation information for the fast uplink feedback channel in subframe number l of frame number i . A timing diagram for transmitting information on a fast uplink feedback channel, i.e., frame indices and subframes, is determined based on i and l . In particular, the frame index j and subframe index m for information transmitted on the fast uplink feedback channel are determined from one of the tables, which are table 2, table 4, table 6 and table 8.

Although here, in relation to a system operating in TDD mode, it has been described that DL subframes and UL subframes are individually indexed in DL and UL, DL and UL subframes can be indexed sequentially in a frame, including in a DL frame and in the UL frame. In this case, the index x of the UL subframe is replaced in the frame by the index d + x of the subframe.

FIGS. 19 and 20 are diagrams illustrating signal flows for operations between a BS and an MS in accordance with DL HARQ and UL HARQ timing diagrams according to exemplary embodiments of the present invention.

With reference to FIG. 19, in operation 1802, the BS transmits system configuration information to the MS. The system configuration information is transmitted by the BS by the broadcast method, or it is obtained by negotiation between the BS and the MS to enable the MS to access the system. Information about the system configuration is necessary to implement HARQ timing diagram structures taking into account the bandwidth (total number of subframes), the number of subframes of each channel (DL and UL), the processing / transmission time at the BS and the processing / transmission time at the MS.

After the MS obtains system information from the system configuration information and accesses the BS, the BS and the MS are able to exchange data with each other at operation 1804. In a modified embodiment of the invention, operation 1804 may be omitted when the system configuration information is already known to MS.

In operation 1806, the BS transmits distribution information to the MS, including or indicating the frame index, subframe index, the presence of a long TTI, and MAP relevance protocol information, in the DL subframe number l of frame number i . The MS extracts the necessary information by decoding the distribution information. The MS determines the frame and subframe indices of each HARQ operation based on the frame indices and subframes of the previous HARQ operation according to at least one of the above-described embodiments of the present invention, which are given as examples.

In operation 1808, the BS transmits the DL HARQ packet in subframe number h of frame number a in accordance with the allocation information, and the MS decodes the DL HARQ packet based on the allocation information. At operation 1810, the MS transmits the HARQ feedback signal to the BS for the DL HARQ packet in accordance with the decoding result in the subframe frame number f, number b .

At operation 1812, the following distribution information may be transmitted in a subframe frame number h frame number c in accordance with a predetermined distribution information transmission period. If the HARQ feedback signal is a NACK signal, then at step 1814 a DL HARQ packet can be retransmitted.

With reference to FIG. 20, in operation 1902, the BS transmits system configuration information to the MS. After the MS obtains system information from the system configuration information and accesses the BS, the BS and the MS are able to exchange data with each other in operation 1904.

In operation 1906, the BS transmits distribution information to the MS, including or indicating the frame index, subframe index, the presence of a long TTI, and MAP relevance protocol information, in the DL subframe number l of frame number i . The MS extracts the necessary information by decoding the distribution information. The MS determines the frame and subframe indices of each HARQ operation based on the frame indices and subframes of the previous HARQ operation according to at least one of the above-described embodiments of the present invention, which are given as examples.

At operation 1908, the MS transmits the UL HARQ packet in subframe number h of frame number a in accordance with the allocation information, and the BS decodes the UL HARQ packet based on the allocation information. In operation 1910, the BS transmits the HARQ feedback signal to the MS for the HARQ UL packet in accordance with the decoding result or the following allocation information in the subframe frame number f frame number b . If the HARQ feedback signal is a NACK signal, then in step 1912, the UL HARQ packet may be retransmitted in subframe number h of frame number c in accordance with a predetermined transmission period.

To implement at least one of the above embodiments of the present invention, which are given as examples, each of the stations: BS and MS, includes a controller configured with a processor, a memory device for storing program codes and related parameters necessary for the operation of the controller, and a transmitter and receiver for exchanging service messages or data flow with the other side under the control of the controller. The controller controls the HARQ timing diagrams to perform transmitter and receiver operations according to at least one of the embodiments of the present invention described above, which are given as examples.

From the above description, it is obvious that the embodiments of the present invention, which are given as examples, provide flexible HARQ transmissions according to various frame configuration methods for different system bandwidths and different ratios between “DL and UL”, allowing a circuit to support legacy systems because HARQ transmission timing diagrams are flexibly integrated into a wireless mobile communication system.

The aforementioned synchronized dependence reduces the number of subframes that the receiver must monitor, thereby saving energy. In addition, the MS can communicate with another system more freely using predetermined timing diagrams of operation.

Despite the fact that the present invention has been demonstrated and described with reference to some variants of its implementation, which are given as examples, for specialists in this field of technology it is clear that various changes can be made in it regarding the form and details, without going beyond the essence and scope of the invention, which are determined by the attached claims and its equivalents.

Claims (30)

1. A method for implementing the operation of a hybrid automatic retransmission request (HARQ) in a wireless mobile communication system in which frames are used for transmitting information, each of which has a plurality of subframes, comprising the following operations:
determining the HARQ timing diagram in accordance with the data packet distribution information transmitted in the downlink (DL) subframe frame number l of the number i, this HARQ timing diagram including the transmission time of the DL data packet and the transmission time of the HARQ feedback signal for HARQ, implemented in DL (DL HARQ), and
implement the operation of HARQ according to a specific HARQ timing diagram;
wherein the index of the at least one frame and the index of the at least one subframe that display the HARQ timing diagram are determined using l and i. 2. The method according to claim 1, in which, when using the frequency division duplex (FDD) mode, the HARQ timing diagram is determined by the equations from the table below or by the table containing the resulting values according to the equations from the table below
Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE) defining resource allocation transmitted over DL l i DL transmitted HARQ subpacket m = l i HARQ Feedback in UL n = ceil (m + F / 2) modF

where l denotes the index of the subframe in which the A-MAP protocol information element (A-MAP IE) defining a resource allocation that includes information about the distribution of data packets is transmitted, i denotes the index of the frame in which the A-MAP IE defining resource allocation, m denotes the index of the subframe at which the transmission of the HARQ subpacket corresponding to the data packet begins, n denotes the index of the subframe in which the HARQ feedback signal is transmitted, j denotes the index of the frame in which the HARQ feedback signal is transmitted, F denotes the number of subframes in a frame, N denotes the number of frames in a superframe and is 4, if each superframe has four frames, az denotes a shift of the DL HARQ feedback signal. 3. The method according to claim 2, in which the shift z of the feedback signal DL HARQ is determined in accordance with the processing time of the data packet for a packet of HARQ subpackets according to the following equation:

where ceil () is the function of rounding the argument up to the nearest integer, N _TTI denotes the number of subframes that the HARQ subpacket covers, and Rx_time denotes the processing time of the data packet. 4. The method according to claim 2, in which the retransmission of the data packet corresponding to the HARQ feedback signal begins in a subframe with the same index m after a predetermined number of frames from the moment the data packet was transmitted. 5. The method according to claim 2, in which the operation for implementing the functioning of the HARQ contains the following operations:
a base station (BS) transmits to a mobile station (MS) a HARQ subpacket that begins in a DL subframe m frame number i; and
The BS receives the HARQ feedback signal from the MS for the HARQ subpacket in the subframe UL frame number n frame number j from the MS. 6. The method according to claim 2, in which the operation for implementing the functioning of the HARQ contains the following operations:
The MS receives from the BS the HARQ subpacket, which begins in the DL subframe m number of frame number i; and
The MS transmits a HARQ feedback signal to the BS for the HARQ subpacket in subframe UL frame number n frame number j. 7. The method according to claim 1, in which, when using the FDD mode and the long transmission time interval (TTI), in which the data packet occupies two or more subframes, the HARQ timing diagram is determined by the following equations or by a table containing the resulting values according to the equations below:

n = ceil (l + F / 2) modF

,
where l denotes the index of the subframe in which the A-MAP protocol information element (A-MAP IE) defining a resource allocation that includes information about the distribution of data packets is transmitted, i denotes the index of the frame in which the A-MAP IE defining resource allocation, m denotes the index of the subframe at which the transmission of the HARQ subpacket corresponding to the data packet begins, n denotes the index of the subframe in which the HARQ feedback signal is transmitted, j denotes the index of the frame in which the HARQ feedback signal is transmitted, F denotes the number of subframes in a frame, N denotes the number of frames in a superframe and is 4 if each superframe has four frames, z denotes a shift of the feedback signal DL HARQ, a

denotes a subframe number x _n frame number i. 8. The method according to claim 2, in which, when using the TDD mode, the HARQ timing diagram is determined by the equations below or by a table containing the resulting values according to the equations of the table below
Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE), determining the distribution of resources transmitted over DL l i DL transmitted HARQ subpacket m = l i HARQ Feedback in UL For D> U,

j = (i + z) modN For D≤U, n = mK
where each frame has D DL subframes and UL UL subframes, l denotes a subframe index in which an A-MAP protocol information element (A-MAP IE) defining a resource allocation that includes data packet distribution information taking values in the interval from 0 to D-1, i denotes the index of the frame in which A-MAP IE defining the distribution of resources is transmitted, m denotes the index of the subframe at which transmission of the HARQ subpacket corresponding to the data packet begins, n denotes the index of the subframe in which the signal is transmitted HARQ sibling, j denotes the index of the frame in which the HARQ feedback signal is transmitted, N denotes the number of frames in the superframe and is 4 if each superframe has four frames, z denotes the transmit shift DL HARQ, and if D is less than U , then K is calculated by the formula -ceil {(UD) / 2}, and if D is equal to or greater than U, then K is calculated by the formula floor {(DU) / 2}. 9. The method of claim 8, in which the shift z of the DL HARQ feedback signal is determined in accordance with the processing time of a data packet for a packet of HARQ subpackets according to the following equation:

,
where N _TTI indicates the number of subframes that the HARQ subpacket covers, and Rx_time indicates the processing time of the data packet. 10. The method of claim 8, wherein the retransmission of the data packet corresponding to the HARQ feedback signal begins in a subframe having an index m of a subframe after a predetermined number of frames from the moment the data packet is transmitted. 11. The method according to claim 8, in which, if the indices l, m and n subframes are used as indices of the DL subframes, then each of the indices l, m and n of the subframes takes values in the range from 0 to D-1, where D is the number of DL subframes specified in the time interval in each frame, except for the time interval in which support for the legacy system is provided, if the indices l, m and n of the subframes are used as indices of the UL subframes, then each of the indices l, m and n of the subframes takes values in the range from 0 to U-1, where U is the number of UL subframes specified in the interval time in each frame, except time interval, wherein provide support legacy systems, and frame indexes are calculated according to the order of indices of subframes corresponding to the entire duration, including the time interval in each frame, which provides support for a legacy system. 12. The method of claim 8, in which, if the indices of the subframes l, m and n are used as indices of the DL subframes, then the indices of the DL subframes are reordered indices of the DL subframes used to transmit information from the relay station (RS) to the MS, if the indices l, m and n of the subframes are used as the indexes of the UL subframes, then the indices of the UL subframes are reordered indices of the UL subframes used to transmit information from the MS to the RS, and the frame indices are calculated according to the order of the subframe indices corresponding to present throughout the duration used for communicating with the RS, in each frame. 13. The method of claim 8, in which the operation for implementing the functioning of the HARQ contains the following operations:
The BS transmits to the MS the HARQ subpacket, which begins in the DL subframe number m of frame number i; and
The BS receives the HARQ feedback signal from the MS for the HARQ subpacket in the subframe UL frame number n frame number j from the MS. 14. The method of claim 8, in which the operation for implementing the functioning of the HARQ contains the following operations:
The MS receives from the BS the HARQ subpacket, which begins in the DL subframe m number of frame number i; and
The MS transmits a HARQ feedback signal to the BS for the HARQ subpacket in subframe UL frame number n frame number j. 15. The method according to claim 1, wherein if the A-MAP protocol information element (A-MAP IE) defining a resource allocation that includes data packet allocation information indicating transmission with a long TTI and l is not 0 in TDD mode, the transmission of the HARQ subpacket corresponding to the data packet begins in the DL subframe number 0 of the frame number (i + 1), and the HARQ feedback signal for the HARQ subpacket is transmitted in the UL subframe number n 'of the frame number j', and
wherein “long TTI transmission” means that the HARQ subpacket spans two or more subframes, and the subframe index n ′ and the frame index j ′ are determined by the equations below or by a table containing the resulting values according to the equations below:

n '= lK, for D≤U
j '= ((i + 1) + z) modN. 16. A method for implementing the operation of a hybrid automatic retransmission request (HARQ) in a wireless mobile communication system in which frames are used for transmitting information, each of which has a plurality of subframes, comprising the following operations:
determining a HARQ timing diagram according to data packet allocation information transmitted in the DL subframe number 1 of frame number i, wherein the HARQ timing diagram includes uplink (UL) data packet transmission time, HARQ feedback signal transmission time, and packet retransmission time data for HARQ implemented in UL (UL HARQ), and
implement the operation of HARQ according to a specific HARQ timing diagram,
wherein the index of the at least one frame and the index of the at least one subframe that display the HARQ timing diagram are determined using l and i. 17. The method according to clause 16, in which, when using the frequency division duplex (FDD) mode, the HARQ timing diagram is determined by the equations from the table below or by the table containing the resulting values according to the equations from the table below
Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE) defining resource allocation transmitted over DL l i UL HARQ Subpacket m = n, where n = ceil (l + F / 2) modF

HARQ Feedback in DL l

where l denotes the index of the subframe in which the A-MAP protocol information element (A-MAP IE) defining a resource allocation that includes information about the distribution of data packets is transmitted, i denotes the index of the frame in which the A-MAP IE defining resource allocation, m denotes the subframe index at which transmission of the HARQ subpacket corresponding to the data packet begins, j denotes the index of the frame in which the HARQ feedback signal is transmitted, F denotes the number of subframes in the frame, N denotes the number of frames in superframe and equal to 4, if each superframe has four frames, k denotes the index of the frame in which the HARQ feedback signal is transmitted, v denotes the UL HARQ transmission shift, aw denotes the UL HARQ feedback signal shift. 18. The method according to 17, in which the shift v of the UL HARQ transmission and the shift w of the UL HARQ feedback signal is determined in accordance with the processing time of a data packet for a packet of HARQ subpackets according to the equations below or a table containing the resulting values according to the following equations:

where ceil () is the rounding function of the argument to the nearest integer, floor () is the rounding function of the argument to the nearest integer, N _TTI indicates the number of subframes that the HARQ subpacket covers, and Rx_time indicates the packet processing time data. 19. The method according to 17, in which the retransmission of the data packet corresponding to the HARQ feedback signal begins at a time determined by an equation from the table below or a table containing the resulting values according to the equation from the table below,
Content Subframe index Frame index UL HARQ Subpacket m

where p denotes the index of the frame at which retransmission of the data packet begins, if the HARQ feedback signal is a non-acknowledgment (NACK) signal, v denotes a UL HARQ transmission shift, aw denotes a UL HARQ feedback signal shift. 20. The method according to 17, in which the operation for implementing the functioning of the HARQ contains the following operations:
a base station (BS) receives from a mobile station (MS) a HARQ subpacket that begins in UL subframe number m of frame number j;
The BS transmits the HARQ feedback signal to the MS for the HARQ subpacket in the downlink (DL) subframe frame number l of frame number k; and
The BS receives from the MS a packet retransmitted according to the HARQ, which begins in the UL subframe m frame number p. 21. The method according to 17, in which the operation for implementing the functioning of the HARQ contains the following operations:
MS transmits to the BS the HARQ subpacket, which begins in UL subframe number m of frame number j;
The MS receives the HARQ feedback signal from the BS for the HARQ subpacket in the subframe DL frame number l of frame number k; and
The MS retransmits the HARQ packet to the BS starting at subframe UL frame number m frame number p. 22. The method according to clause 16, in which, when using the FDD mode and the long TTI, in which the data packet occupies two or more subframes, the HARQ timing diagram is determined by the equations below or by a table containing the resulting values according to the equations below :

n = ceil (l + F / 2) modF

,
where l denotes the index of the subframe in which the A-MAP protocol information element (A-MAP IE) defining a resource allocation that includes information about the distribution of data packets is transmitted, i denotes the index of the frame in which the A-MAP IE defining resource allocation, m denotes the index of the subframe at which the transmission of the HARQ subpacket corresponding to the data packet begins, n denotes the index of the subframe in which the HARQ feedback signal is transmitted, j denotes the index of the frame in which the HARQ feedback signal is transmitted, F denotes the number of subframes in a frame, N denotes the number of frames in a superframe and is equal to 4, if each superframe has four frames, p denotes the index of the frame at which retransmission of the data packet begins, if the HARQ feedback signal is NACK, v denotes the offset of the feedback signal UL HARQ, and

denotes a subframe number y _n frame number i. 23. The method according to clause 16, in which, when using the TDD mode, the HARQ timing diagram is determined by the equations from the table below or by a table containing the resulting values according to the equations from the table below
Content Subframe index Frame index A-MAP Protocol Information Element (A-MAP IE) determining the distribution l i resources transmitted over DL UL HARQ Subpacket For D≥U,

For 1 <D <U,

j = (i + v) modN For D = 1, m = 0, 1, ..., or U-1 for l = 0 HARQ Feedback in DL l k = (j + 1 + w) modN
where each frame has D DL subframes and U UL subframes, l denotes a subframe index in which an A-MAP protocol information element (A-MAP IE) defining a resource allocation that includes data packet distribution information taking values in the interval from 0 to D-1, i denotes the index of the frame in which A-MAP IE defining the distribution of resources is transmitted, m denotes the index of the subframe at which transmission of the HARQ subpacket corresponding to the data packet begins, n denotes the index of the subframe in which the signal is transmitted HARQ sibling, j denotes the index of the frame in which the HARQ feedback signal is transmitted, N denotes the number of frames in the superframe and is 4 if each superframe has four frames, k denotes the index of the frame in which the HARQ feedback signal is transmitted, v denotes the shift UL HARQ transmissions, w denotes the shift of the UL HARQ feedback signal, and if D is less than U, then K is calculated by the formula - {ceil (UD) / 2}, and if D is equal to or greater than U, then K is calculated by the formula floor {(DU) / 2}. 24. The method according to item 23, in which the shift v of the UL HARQ transmission and the shift w of the UL HARQ feedback signal is determined in accordance with the processing time of the data packet for a packet of HARQ subpackets according to the equations below:

,
where N _TTI denotes the number of subframes that the HARQ subpacket covers, and each of Tx_time and Rx_time indicates the processing time of the data packet. 25. The method according to item 23, in which the retransmission of the data packet corresponding to the feedback signal HARQ, starts at the point in time specified in the table below,
Content Subframe index Frame index UL HARQ Subpacket m p = (k + ν) mod4
where p denotes the index of the frame at which retransmission of the data packet begins, if the HARQ feedback signal is an acknowledgment (NACK) signal. 26. The method according to item 23, in which, if the indices l, m and n subframes are used as indices of the DL subframes, then each of the indices l, m and n of the subframes 1, m and n takes values in the range from 0 to D- 1, where D is the number of DL subframes specified in the time interval in each frame, with the exception of the time period in which support for the outdated system is provided, if the indices l, m and n of the subframes are used as indices of the UL subframes, then each of the indices l, m and n subframes takes values in the range from 0 to U-1, where U is the number of UL subframes specified in prom the time slice in each frame, except for the time interval in which support for the outdated system is provided, and the frame indices are calculated according to the sequence order of the subframes corresponding to the entire duration, including the time interval in each frame in which support for the outdated system is provided. 27. The method according to item 23, in which, if the indices l, m and n subframes are used as indices of the DL subframes, then the indices of the DL subframes are reordered indices of the DL subframes used to transmit information from the relay station (RS) to the MS, if the indices l, m and n of the subframes are used as the indexes of the UL subframes, then the indices of the UL subframes are reordered indices of the UL subframes used to transmit information from the MS to the RS, and the frame indices are calculated according to the order of the subframe indices corresponding to the entire duration used to communicate with RS in each frame. 28. The method according to item 23, in which the operation for implementing the functioning of the HARQ contains the following operations:
The BS receives from the MS the HARQ subpacket, which begins in the UL subframe number m of frame number j;
The BS transmits the HARQ feedback signal to the MS for the HARQ subpacket in the subframe DL frame number l of frame number k; and
The BS receives from the MS the retransmission of the HARQ subpacket, starting from subframe UL frame number m frame number p. 29. The method according to item 23, in which the operation for implementing the functioning of the HARQ contains the following operations:
MS transmits to the BS the HARQ subpacket, which begins in UL subframe number m of frame number j;
The MS receives the HARQ feedback signal from the BS for the HARQ subpacket in the subframe DL frame number l of frame number k; and
The MS retransmits the HARQ subpacket to the BS starting at subframe UL frame number m frame number p. 30. The method according to clause 16, in which, if the A-MAP protocol information element (A-MAP IE) that defines the distribution of resources, which includes information about the distribution of data packets indicating the transmission with a long TTI in TDD mode, then the transmission the HARQ subpacket corresponding to the data packet starts in the UL subframe number 0 of frame number j, and the HARQ feedback signal for the HARQ subpacket is transmitted in frame UL subframe number l of frame number p, and in which “long TTI transmission” means that the HARQ subpacket covers two or more subframes.

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