KR20180098139A - Method and apparatus for processing hybrid automatic repeat request process in communication system - Google Patents

Abstract

A method and apparatus for processing HARQ processes in a communication system is disclosed. A method of operating a communication node includes configuring one or more HARQ groups, and placing an HARQ process ID in each of the one or more HARQ groups, wherein each of the one or more HARQ groups includes a HARQ memory group, And a decoder group for decoding data stored in the HARQ memory group by accessing the HARQ memory group through the memory controller group. Therefore, the performance of the communication system can be improved.

Description

TECHNICAL FIELD [0001] The present invention relates to a method and apparatus for processing HARQ processes in a communication system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to hybrid automatic repeat request (HARQ) technology in a communication system, and more particularly to a hybrid automatic repeat request (HARQ) technique for independently processing HARQ processes to satisfy high data throughput and low latency requirements. Technology.

In a communication system, data packets may be transmitted from a transmitter (e.g., a base station) to a receiver (e.g., a terminal) over a wireless channel. An error may occur in the data packet received at the receiver depending on the state of the wireless channel (e.g., the quality change of the wireless channel). A forward error correction (FEC) technique may be used to recover the receive error. If the FEC technique is used in a communication system, the transmitter may transmit a data packet containing redundancy and the receiver may recover the error using redundancy in the presence of an error in the received data packet .

An automatic repeat request (ARQ) technique may also be used to recover the receive error. When an ARQ technique is used in a communication system, the transmitter may transmit a data packet including a cyclic redundancy check (CRC), and the receiver may check for the presence of an error based on the CRC included in the received data packet. If there is no error in the received data packet, the receiver can send an acknowledgment (ACK) to the transmitter. On the other hand, if there is an error in the received data packet, the receiver may send a NACK (negative ACK) to the transmitter. The transmitter receiving the NACK can retransmit the same data packet to the receiver.

Also, HARQ (hybrid ARQ) technology, which is a combination of FEC technology and ARQ technology, can be used in a communication system. The HARQ retransmission procedure can be performed based on a chase combining (CC) scheme or an incremental redundancy (IR) scheme. When the HARQ retransmission procedure according to the CC scheme is performed, the transmitter can repeatedly transmit the same data packet. In this case, the receiver can decode the data packet by combining the same received data packets. When the HARQ retransmission procedure according to the IR scheme is performed, the transmitter can transmit data packets having different RVs (Redundancy Versions). The receiver can decode the data packet by combining the received data packets having different RVs.

Meanwhile, when a HARQ retransmission procedure is performed, a transport block (TB) corresponding to an HARQ process identifier may be stored in an HARQ memory (e.g., HARQ buffer). The size of the HARQ memory may be increased to meet the requirements of high data throughput in communication systems. However, when the size of the HARQ memory increases, the requirement of low latency may not be satisfied. Therefore, there is a need for HARQ techniques to meet the requirements of high data throughput and low latency.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for independently processing an HARQ process in a communication system.

According to another aspect of the present invention, there is provided a method of operating a first communication node, the method comprising: setting one or more HARQ groups; and assigning HARQ process IDs to each of the one or more HARQ groups Wherein each of the one or more HARQ groups includes a HARQ memory group, a memory controller group for controlling the HARQ memory group, and a decoder for decoding data stored in the HARQ memory group by accessing the HARQ memory group through the memory controller group Group, and the allocation interval of HARQ process IDs belonging to the at least one same HARQ group is longer than the processing time of one HARQ process. The minimum value of the processing time of the HARQ process may be given as the HARQ memory processing time.

Here, the parameters used for setting the one or more HARQ groups may be received through at least one of an RRC signaling procedure, a system information transmission procedure, and a control information transmission procedure.

Herein, the at least one HARQ group includes at least one of a total number of the at least one HARQ group, a total number of HARQ process IDs belonging to the at least one HARQ group, a total number of decoders belonging to the at least one HARQ group, A group allocation interval, a HARQ process ID allocated in the at least one HARQ group, and a HARQ process time.

Here, the method of arranging the HARQ process IDs can not be explained in detail because there are numerous methods depending on the situation. Therefore, for ease of explanation, the description will be made based on a situation in which the most complicated operation is performed in the HARQ position as an example. The most complicated situation in the HARQ position is the number of the maximum allowable HARQ process IDs, but NACK is generated in all the arranged HARQ process IDs and the retransmission management is required for all the arranged HARQ process IDs. In this situation, since all allowable HARQ process IDs are arranged, modeling into a situation in which the HARQ process IDs are arranged in a simple increase or decrease manner every TTI does not detract from the specifics of the analysis. Therefore, if there is no mention, I will explain it as a reference. However, this assumption is for ease of explanation, and the content of the present invention is not limited to being established under the above assumption.

Here, it is assumed that the HARQ process time is L, the total number of one or more HARQ groups is K, the HARQ group arrangement interval is S, the total number of HARQ process IDs is N, An embodiment of a method of placing an HARQ process ID in an HARQ group so as to obtain a placement interval of L TTI or more when the number of the HARQ process ID of the HARQ process ID is j, And allocating them to the same HARQ group. In the case of "N mod K = 0", "min (S) = K" is established because the minimum value of the arrangement interval S of the HARQ process IDs belonging to the same HARQ group is K TTI. K = min (S)? L "can be established by the condition" the HARQ processing time L is equal to or greater than the HARQ processing time L ". Therefore, if the number of HARQ groups K is selected so that "K > L" is satisfied, the HARQ process ID can be placed in a specific HARQ group so that the arrangement interval S have.

Here, when "N mod K ≠ 0", it is possible to operate in various ways.

First, the HARQ process ID may be allocated to the HARQ group and used in the same manner as in the conventional method. In this case, the minimum value of the arrangement interval S of HARQ groups is set to N mod K. Therefore, in this case, K may be selected such that "N mod K &gt; L" is satisfied. Assuming that "N mod K = αK (0 <α <1)", K should be selected to satisfy "K ≥ L / α". Since the complexity increases as the number of HARQ groups (K) increases, the fact that it is advantageous to keep the K value as small as possible is the fact that choosing K so that α is as close to 1 as possible is a way to minimize K .

As another method in the case of "N mod K ≠ 0", a method of selecting K so that the value of α is close to 1 at maximum can be used. That is, if the operation of comparing N mod K with K / 2 is added to the method of allocating the HARQ process ID to the HARQ group, the minimum value of the HARQ group allocation interval can always be maintained larger than K / 2. That is, when only the method of placing the HARQ process ID j in the HARQ group "j mod K" is used, an operation of comparing N mod K and K / 2 is further performed, The HARQ group can be arranged such that "1/2 < alpha < 1" is always maintained.

If N mod K &gt; K / 2, HARQ process ID #j among N HARQ process IDs may be placed in HARQ group # (j mod K). In this case, the minimum value of the arrangement interval S of HARQ groups is given as "N mod K" and may be K / 2 or more. Quot; floor (N / K) * K "HARQ process IDs #j that can be grouped by K out of N HARQ process IDs are assigned to HARQ group # (j mod K) And the remaining "N mod K" HARQ process IDs #j may be placed in the HARQ group # ((K / 2) + (j mod K)). In this case, the minimum value of the arrangement interval of the HARQ groups is (K / 2 + (j mod K)), which may be always larger than K / 2. Therefore, "min (S) = K / 2" can be established because the minimum value of the arrangement interval S of the HARQ groups for all Ks is K / 2 or more in the state of "N mod K ≠ 0". Accordingly, "min (S) = K / 2? L" can be established, and in this case, the number K of HARQ groups can be selected to satisfy "K ≥ 2L".

In general, if the N mod K < K / x (x is a natural number of 2 or more), N mod K HARQ process IDs # j are allocated to HARQ group # ) (where beta is an arbitrary real number equal to or larger than 1 / x and equal to or smaller than 1), the arrangement interval of the HARQ process can always be K / x or more.

Here, it will be emphasized again that the methods of grouping the HARQ process IDs described above are merely examples for ease of explanation. As described above, the method of arranging the HARQ process IDs is so numerous that it can not be explained at all, and accordingly, the HARQ process ID is simply increased or decreased according to the TTI, which is assumed for ease of explanation. Quot; j mod K "result for grouping the HARQ process IDs for each HARQ group in a situation where the HARQ process IDs are grouped by using a result of" j mod K ". The HARQ process ID having the arrangement interval exists in the same HARQ group and the HARQ process ID allocation interval S included in the same HARQ group is longer than the HARQ process time L to operate HARQ It is a key point. Therefore, if there is a placement interval between HARQ process IDs, placement of HARQ process IDs belonging to the same HARQ group through another form (for example, another formula, table, or separate signaling, etc.) The interval S can be grouped so as to be equal to or greater than L TTI.

Together, the HARQ process IDs can be mapped to HARQ groups by the HARQ group mapping function, so that the HARQ process IDs can be grouped. Here, an input of the HARQ group mapping function may be a HARQ process ID and an HARQ process processing time, and an output of the HARQ group mapping function may be a HARQ group. In this case, the arrangement interval of the HARQ groups may be longer than the HARQ process processing time. The above-described embodiment can be an example of a case where the HARQ group mapping function is "j mod K ".

In addition, if there is no mention in all the situations mentioned in the present invention, a method of arranging empty TTIs appropriately during the TTI process and making the arrangement interval of the HARQ groups greater than LTI is always available.

Here, the method of operating the first communication node may include receiving a transport block from a second communication node, performing a demodulation operation on the transport block, performing a demapping operation on the demodulated transport block, Storing the demapped transport block in the HARQ memory group, and performing a decoding operation on a demapping transport block stored in the HARQ memory group.

The demapped transport block may be stored in a HARQ memory group belonging to a HARQ group in which the HARQ process ID of the demapped transport block is located.

Herein, the performing the decoding operation comprises: checking an HARQ memory group in which the demapped transport block is stored based on a HARQ process ID of the demapping transport block; Acquiring a transport block, and performing a decoding operation on the obtained demapped transport block.

According to another aspect of the present invention, there is provided a method for operating a first communication node, the method comprising: setting parameters to be used for setting one or more HARQ groups; Wherein each of the one or more HARQ groups includes a HARQ memory group, a memory controller group for controlling the HARQ memory group, and data stored in the HARQ memory group by accessing the HARQ memory group through the memory controller group Wherein the parameters include a total number of one or more HARQ groups, a total number of HARQ process IDs belonging to the at least one HARQ group, a total number of decoders belonging to the at least one HARQ group, The allocation interval of the same HARQ group, And a processing time of the HARQ process.

Here, the parameters may be transmitted through at least one of an RRC signaling procedure, a system information transmission procedure, and a control information transmission procedure.

Here, the allocation interval of HARQ process IDs belonging to the at least one same HARQ group may be longer than the processing time of one HARQ process.

 Here, it is assumed that the HARQ process time is L, the total number of one or more HARQ groups is K, the HARQ group arrangement interval is S, the total number of HARQ process IDs is N, An embodiment of a method of placing an HARQ process ID in an HARQ group so as to obtain a placement interval of L TTI or more when the number of the HARQ process ID of the HARQ process ID is j, And allocating them to the same HARQ group.

According to another aspect of the present invention, there is provided a communication node including a processor and a memory in which at least one instruction executed by the processor is stored, wherein the at least one instruction sets at least one HARQ group And allocating an HARQ process ID to each of the one or more HARQ groups, wherein each of the one or more HARQ groups includes a HARQ memory group, a memory controller group controlling the HARQ memory group, And a decoder group for decoding the data stored in the HARQ memory group by accessing the HARQ memory group. The arrangement interval of the HARQ process IDs belonging to the at least one same HARQ group is longer than the processing time of one HARQ process.

Herein, the at least one HARQ group includes at least one of a total number of the at least one HARQ group, a total number of HARQ process IDs belonging to the at least one HARQ group, a total number of decoders belonging to the at least one HARQ group, The group allocation interval, and the HARQ process ID and the processing time of the HARQ process disposed in the at least one HARQ group.

 Here, it is assumed that the HARQ process time is L, the total number of one or more HARQ groups is K, the HARQ group arrangement interval is S, the total number of HARQ process IDs is N, An embodiment of a method of placing an HARQ process ID in an HARQ group so as to obtain a placement interval of L TTI or more when the number of the HARQ process ID of the HARQ process ID is j, And allocating them to the same HARQ group.

 In the case of "N mod K = 0", "min (S) = K" is established because the minimum value of the arrangement interval S of the HARQ process IDs belonging to the same HARQ group is K TTI. K = min (S)? L "is established because the HARQ processing time L is equal to or greater than the HARQ group allocation interval S (i.e.," S? L " Therefore, if the number of HARQ groups K is selected so that "K &gt; L" is satisfied, the HARQ process ID can be placed in a specific HARQ group so that the arrangement interval S have.

Here, when "N mod K ≠ 0", it is possible to operate in various ways.

First, the HARQ process ID may be allocated to the HARQ group and used in the same manner as in the conventional method. In this case, the minimum value of the arrangement interval S of HARQ groups is set to N mod K. Therefore, in this case, K should be selected to satisfy "N mod K ≥ L". Assuming that "N mod K = αK (0 <α <1)", K should be selected to satisfy "K ≥ L / α". Since the complexity increases as the number of HARQ groups (K) increases, the fact that it is advantageous to keep the K value as small as possible is the fact that choosing K so that α is as close to 1 as possible is a way to minimize K .

As another method, a method of selecting K so that α is as close as possible to 1 can be used. That is, if the operation of comparing N mod K with K / 2 is added to the method of allocating the HARQ process ID to the HARQ group, the minimum value of the HARQ group allocation interval can always be maintained larger than K / 2. That is, when only the method of allocating the HARQ process ID #j to the HARQ group "j mod K" is used, an operation of comparing N mod K and K / 2 is performed, The HARQ group can be arranged such that "1/2 < alpha < 1" is always maintained. If N mod K &gt; K / 2, HARQ process ID #j among N HARQ process IDs may be placed in HARQ group # (j mod K). In this case, the minimum value of the arrangement interval S of HARQ groups is given as "N mod K" Quot; floor (N / K) * K "HARQ process IDs #j that can be grouped by K out of N HARQ process IDs are assigned to HARQ group # (j mod K) And the remaining "N mod K" HARQ process IDs #j may be placed in the HARQ group # ((K / 2) + (j mod K)). In this case, the minimum value of the arrangement interval of HARQ groups is (K / 2 + (j mod K)), which is always larger than K / 2. Therefore, "min (S) = K / 2" is established because the minimum value of the HARQ group allocation interval S is K / 2 or more for all the Ks in the state of "N mod K ≠ 0". Accordingly, "min (S) = K / 2 ≥ L" must be established, so that in this case, the number K of HARQ groups can be selected to satisfy "K ≥ 2L".

In general, if the N mod K < K / x (x is a natural number of 2 or more), N mod K HARQ process IDs # j are allocated to HARQ group # ) (where beta is an arbitrary real number equal to or larger than 1 / x and equal to or smaller than 1), the arrangement interval of the HARQ process can always be K / x or more.

According to the present invention, an HARQ memory for storing a transmission block corresponding to a hybrid automatic repeat request (HARQ) process identifier can be divided into one or more HARQ memory groups considering the processing time of the corresponding HARQ process. Also, a memory controller group and a decoder group (or an encoder group) corresponding to each of one or more HARQ memory groups may be set. With this configuration, since the processing operation of the HARQ process is performed independently, no conflict may occur between the processing operations of the HARQ processes. Therefore, the requirements of high data throughput and low delay in the communication system can be satisfied, and the size of HARQ memory can also be relatively reduced. As a result, the performance of the communication system can be improved.

1 is a conceptual diagram showing a first embodiment of a communication system.
2 is a block diagram showing a first embodiment of a communication node constituting a communication system.
3 is a block diagram illustrating a first embodiment of a transceiver included in the communication node of FIG.
4 is a block diagram showing a first embodiment of the configuration of "decoder-memory" in the processing procedure of the HARQ process.
5 is a block diagram showing a second embodiment of the configuration of "decoder-memory" in the processing procedure of the HARQ process.
6 is a timing chart showing a first embodiment of the arrangement of HARQ groups.
7 is a timing chart showing a second embodiment of the arrangement of HARQ groups.
8 is a timing diagram showing a third embodiment of the arrangement of HARQ groups.
9 is a timing diagram showing a fourth embodiment of the arrangement of HARQ groups.
10 is a timing chart showing a fifth embodiment of the arrangement of HARQ groups.
11 is a timing chart showing a sixth embodiment of the arrangement of HARQ groups.
12 is a flowchart showing a first embodiment of a processing method of the HARQ process.
13 is a conceptual diagram showing a first embodiment of the configuration of a HARQ group when "N mod K ≠ 0" and "N mod K ≥ K / 2".
14 is a conceptual diagram showing a first embodiment of the configuration of a HARQ group when "N mod K ≠ 0" and "N mod K <K / 2".
15 is a block diagram showing a third embodiment of the configuration of "decoder-memory" in the HARQ process procedure.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The term &quot; and / or &quot; includes any combination of one or more related listed items or any of the one or more related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular &lt; / RTI &gt; expression includes one or more expressions unless the context clearly indicates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the understanding of the present invention, the same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

A communication system to which embodiments of the present invention are applied will be described. The communication system to which the embodiments according to the present invention are applied is not limited to the following description, and the embodiments according to the present invention can be applied to various communication systems. Here, the communication system can be used in the same sense as a communication network.

1 is a conceptual diagram showing a first embodiment of a communication system.

Referring to FIG. 1, a communication system 100 may include one or more communication nodes 110, 121, 122, 123, 124, 125. The communication system 100 also includes a core network (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway, a mobility management entity . The one or more communication nodes may be 4G communication (e.g., LTE (Long Term Evolution), LTE-A (Advanced)), 5G communication (e.g., NR (new radio) Communication) can be supported.

For example, one or more of the communication nodes may be a communication protocol based on a code division multiple access (CDMA), a communication protocol based on a wideband CDMA (WCDMA), a communication protocol based on a time division multiple access (TDMA), a communication based on frequency division multiple access Protocol, a communication protocol based on OFDM (Orthogonal Frequency Division Multiplexing), a communication protocol based on OFDMA (orthogonal frequency division multiple access), a communication protocol based on single carrier (FD) A communication protocol based on generalized frequency division multiplexing (GFDM), a filter bank multi-carrier (FBMC), a communication protocol based on universal filtered multi-carrier (UFMC), a communication based on SDMA (Space Division Multiple Access) Protocol and so on.

On the other hand, each of the one or more communication nodes may have the following structure.

2 is a block diagram showing a first embodiment of a communication node constituting a communication system.

Referring to FIG. 2, the communication node 200 may include at least one processor 210, a memory 220, and a transceiver 230 connected to the network to perform communication. The communication node 200 may further include an input interface device 240, an output interface device 250, a storage device 260, and the like. Each component included in the communication node 200 may be connected by a bus 270 and communicate with each other.

However, each component included in the communication node 200 may not be connected to the common bus 270 but may be connected to the processor 210 via an individual interface or a separate bus. For example, the processor 210 may be coupled to at least one of the memory 220, the transceiver 230, the input interface 240, the output interface 250 and the storage 260 via a dedicated interface .

The processor 210 may execute a program command stored in at least one of the memory 220 and the storage device 260. The processor 210 may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods in accordance with embodiments of the present invention are performed. Each of the memory 220 and the storage device 260 may be constituted of at least one of a volatile storage medium and a nonvolatile storage medium. For example, the memory 220 may comprise at least one of read-only memory (ROM) and random access memory (RAM).

Referring again to FIG. 1, in the communication system 100, the base station 110 may form a macro cell or a small cell and may be connected to a core network through an idle backhaul or a non-idle backhaul . The base station 110 can transmit a signal received from the core network to the corresponding terminals 121, 122, 123, 124 and 125 and transmit signals received from the terminals 121, 122, 123, Lt; / RTI &gt; One or more terminals 121, 122, 123, 124, and 125 may reside within the cell coverage of the base station 110. One or more terminals 121, 122, 123, 124 and 125 may be connected to the base station 110 by performing a connection establishment procedure with the base station 110. One or more terminals 121, 122, 123, 124, 125 may communicate with the base station 110 after being connected to the base station 110.

In addition, the BS 110 may transmit multiple input multiple output (MIMO) (e.g., single user (SU) -MIMO, multi user (MU) -MIMO, massive MIMO, (Carrier aggregation) transmission, unlicensed band transmission, and device to device communication (D2D) (or ProSe (proximity services)). Each of the one or more terminals 121, 122, 123, 124, and 125 may perform an operation corresponding to the base station 110, an operation supported by the base station 110, and the like.

The base station 110 includes a Node B, an eNB, a gNB, a base transceiver station (BTS), a radio remote head (RRH), a transmission reception point (TRP), a radio unit (RU) , A radio transceiver, an access point, an access node, and the like. Each of the one or more terminals 121, 122, 123, 124 and 125 may be a user equipment (UE), an access terminal, a mobile terminal, a station, a subscriber station, A mobile station, a portable subscriber station, a node, a device, an on-broad unit (OBU), and the like.

Next, independent processing methods of a hybrid automatic repeat request (HARQ) process in a communication system will be described. Even if a method (e.g., transmission or reception of a data packet) performed at the first communication node among the communication nodes is described, the corresponding second communication node can be a method corresponding to the method performed at the first communication node For example, receiving or transmitting a data packet). That is, when the operation of the terminal is described, the corresponding base station can perform an operation corresponding to the operation of the terminal. Conversely, when the operation of the base station is described, the corresponding terminal can perform an operation corresponding to the operation of the base station.

FIG. 3 is a block diagram showing a first embodiment of a transceiver included in the communication node of FIG. 2, and FIG. 4 shows a first embodiment of the configuration of "decoder-memory" Block diagram.

3 and 4, the transmission / reception device 230 of the communication node 200 may include a transmission device 231, a reception device 233, an antenna 235, and the like. The transmitting apparatus 231 includes an encoder 231-1, a mapper 231-3, a modulator 231-5, an inverse fast Fourier transform (IFFT) 231-7, a DAC (digital-to-analog converter) 231-9, and the like. The results processed by the components 231-1, 231-3, 231-5, 231-7, and 231-9 included in the transmission apparatus 231 may be stored in the memory 220. [ The receiver 233 includes a decoder 233-1, a demapper 233-3, a demodulator 233-5, an FFT 233-7, an analog-to- digital converter 233-9, and the like. The results processed by the components 233-1, 233-3, 233-5, 233-7, and 233-9 included in the receiving apparatus 233 may be stored in the memory 220. [

When the HARQ retransmission procedure is performed, the received data packet may be stored in the HARQ memory 223 for each HARQ process identifier. For example, when a HARQ process ID is set for each transport block TB, the HARQ process ID number of the transport block # 0 may be set to "0", and the HARQ process ID of the transport block # Number can be set to "1", and the number of the HARQ process ID of the transport block # (N-1) can be set to "N-1". Here, N may be an integer equal to or greater than zero.

The HARQ memory 223 may belong to the memory 220 of the communication node 200 and the result processed by the demapper 233-3 may be stored in the HARQ memory 223. [ The area indicated by the HARQ process ID # 0 in the HARQ memory 223 is an area in which a transport block # 0 corresponding to the HARQ process ID # 0 (for example, a log likelihood ratio (LLR) value for the transport block # 0) And the area indicated by the HARQ process ID # 1 in the HARQ memory 223 is an area in which the transport block # 1 corresponding to the HARQ process ID # 1 (for example, the LLR value for the transport block # 1) is stored (N-1) corresponding to the HARQ process ID # (N-1) (for example, the transmission of the HARQ process ID # The LLR value for block # (N-1)) may be stored.

The decoder 233-1 may be composed of one or more decoders 233-1-0 to 233-1- (M-1). Here, M may be an integer of 0 or more. Each of the one or more decoders 233-1-0 through 233-1- (M-1) may be connected to the HARQ memory 223 via a memory controller 225 and may receive HARQ It is possible to obtain a transport block corresponding to the process ID (e.g., an LLR value for the transport block), and perform decoding on the obtained transport block. The memory controller 225 may be referred to as a " memory arbiter "or a" memory interface ". When one or more memory access requests are received from one or more decoders 233-1-0 through 233-1- (M-1), the memory controller 225 sequentially processes one or more memory access requests, The decoders 233-1-0 to 233-1- (M-1) can be connected to the HARQ memory 223 at different times.

On the other hand, when the HARQ retransmission procedure is performed, the operation of the transmitting apparatus 231 may correspond to the operation of the receiving apparatus 233 described above. In this case, one or more decoders 233-1-0 through 233-1- (M-1) may be one or more encoders, and the HARQ memory 223 may store the results processed by one or more encoders have.

In the HARQ retransmission procedure, the transmission blocks corresponding to the entire HARQ process IDs can be managed by one HARQ memory 223. High capacity HARQ memory " and "simultaneous access HARQ memory" are required to satisfy the requirements of high data throughput and low latency in the HARQ memory 223 .

The HARQ retransmission procedure may be controlled by a receiver (e.g., receiver 233), and a retransmission operation may be performed for each HARQ process ID (e.g., a transport block). As the data throughput increases, the size of the transport block may increase, and thus a large capacity HARQ memory 223 may be required. Also, when a time division duplex (TDD) type frame is used due to a shortage of frequency resources, the number of HARQ process IDs managed in the HARQ retransmission procedure may increase because a bidirectional link can not exist. For this reason, a large capacity HARQ memory 223 may be required.

However, since the delay time (for example, the delay time of the HARQ process process) increases with an increase in the size of the HARQ memory 223, it may be difficult to increase the speed of the circuit. Also, since there is a limit to increase the clock of the circuit, the requirements of high data throughput and low delay may not be satisfied. As the size of the HARQ memory 223 increases in terms of cost, the cost of the HARQ memory 223 increases, so that the implementation cost of the circuit may increase.

Also, a short delay may be required in 5G communication compared to conventional communication (e.g., 4G communication). If the size of the transport block increases to meet the requirements of high data throughput, the delay time may increase. In this case, it may be considered to reduce the transmission time interval (TTI) duration to satisfy the low delay requirement. That is, the speeding up of the circuit may be necessary to process the transport block with the increased size within the reduced TTI duration. There is a limitation in improvement in performance due to the speeding up of the circuit. Therefore, a scheme of using one or more decoders (233-1-0 to 233-1- (M-1)) configured in parallel can be considered.

Each of the one or more decoders 233-1-0 to 233-1- (M-1) is connected to the memory controller 225 to perform a processing operation (hereinafter referred to as "HARQ processing operation") of the HARQ process. It may be necessary to process memory access requests that occur simultaneously in the memory controller 225. For the processing of memory access requests, the complexity of the memory controller 225 and the cost of the HARQ memory 223 may increase, A conflict may occur in the HARQ memory 223 between HARQ memory access requests in accordance with one or more memory access requests. To address this problem, the memory controller 225 may include one or more memory accesses The HARQ processing operations may generate one HARQ memory access request corresponding to one memory access request through an arbitration operation in the presence of requests. So as to perform, it can increase the delay time.

That is, a large capacity HARQ memory 223 may be needed to meet the requirements of high data throughput, and one or more decoders 233-1-0 to 233-1- (M-1) may be needed and an arbitration scheme of memory access requests occurring simultaneously by one or more decoders 233-1-0 to 233-1- (M-1) may be required.

5 is a block diagram showing a second embodiment of the configuration of "decoder-memory" in the processing procedure of the HARQ process.

Referring to FIG. 5, one or more HARQ groups (e.g., HARQ groups # 0 to # (K-1)) may be configured, and each of the one or more HARQ groups may be configured with HARQ memory groups, Group. The HARQ memory group may store a transport block corresponding to the HARQ process ID, the memory controller group may control the HARQ memory group, and the decoder group may access the HARQ memory group through the memory controller group, The block can be decoded. For example, HARQ group # 0 may include HARQ memory group # 0, memory controller group # 0 and decoder group # 0, HARQ group # (K-1) may include HARQ memory group # Memory controller group # (K-1) and decoder group # (K-1).

The HARQ group, the HARQ memory group, the memory controller group and the decoder group (or the encoder group) can be set based on the following parameters (hereinafter referred to as "HARQ parameters & Will be described in detail.

- K: the total number of HARQ groups configured in the transmitting apparatus or the receiving apparatus

- N _k : the total number of HARQ process IDs belonging to the HARQ group #k (for example, HARQ groups # 0 to # (K-1)

- N: total number of HARQ process IDs

- _Mk : total number of decoders (or encoders) belonging to HARQ group #k (for example, HARQ groups # 0 to # (K-1)

- M: total number of decoders

- S: HARQ group allocation interval (TTI unit)

- HARQ process ID in the HARQ group

- L: time of performing the HARQ process operation (for example, a delay time according to the HARQ process operation) (TTI unit)

On the other hand, in order to minimize simultaneous memory access requests, one or more decoders may be set to one decoder group, and a HARQ memory group and a memory controller group for each of the decoder groups may be set. The configuration of the "encoder-memory" may be the same as or similar to the configuration of the "decoder-memory" For example, a decoder group may correspond to an encoder group (or an entity group performing an L2 function) of the transmitting apparatus, and the encoder group may correspond to one or more encoders (e.g., entities performing L2 functions ).

In FIG. 4, since each of the decoders 233-1-0 to 233-1- (M-1) does not know the HARQ process ID to be processed by itself, one or more memory access requests can occur at the same time. On the other hand, in FIG. 5, HARQ memory groups (for example, HARQ process IDs belonging to the same HARQ memory group) assigned to each of the decoder groups are set, so that physically separated HARQ memories can be configured. For example, a HARQ memory corresponding to a range of HARQ process ID to be processed by each of the decoder groups may be configured, and each of the decoder groups may independently perform a processing operation of the HARQ process. Thus, conflicts between memory access requests can be minimized.

In addition, when the interval of the HARQ process IDs belonging to each of the HARQ memory groups is set to be longer than the execution time of the HARQ process operation (for example, the delay time of the HARQ process operation), HARQ process operations in each HARQ group are performed independently The complexity of the memory controller group can be reduced.

Total number of HARQ groups (K)

The number K of HARQ groups can be set within a range satisfying the following condition 1 when N mod K = 0, and the number K of HARQ groups when N mod K = 0 Can be set within a range satisfying Condition 2 below.

- Condition 1: L? K? M

Condition 2: L * K / (N mod K) ≤ K ≤ M or xL ≤ K ≤ M (x is a natural number of 2 or more)

Also, the total number of HARQ memory groups, memory controller groups, and decoder groups, respectively, may be equal to the total number of HARQ groups.

■ HARQ  process IDs  Total number (N)

The total number (N) of HARQ process IDs can be set within the maximum value defined in the specification. For example, when the maximum value of the number of HARQ process IDs in the specification is set to 16, the total number N of HARQ process IDs can be set to 16 or less. In addition, the total number of HARQ process IDs may be interpreted as the total number of HARQ process IDs arranged to perform HARQ operations.

Total number of decoders (M)

The total number M of decoders included in the receiving apparatus 233 (or the total number M of encoders included in the transmitting apparatus 231) . &Lt; / RTI &gt; When the execution time of the HARQ processing operation for processing a data packet according to the maximum amount of transmission is "L TTI &quot;, M decoders in the receiving apparatus 233 can be configured. It is preferable that the decoder group is repeated every "K TTI " if possible, so that the number of decoders M belonging to the decoder group #i _i ) may be "min (M _i ) = M / K &quot;. In general, the value of min ( _Mi ) must be maintained at 1 or more so that the HARQ group can be preferably operated, so that "K &amp;le;M" Since the sum of the number of decoders of each HARQ group is equal to the total number of decoders, "? M _i = M" can be satisfied.

■ HARQ  The placement (or assignment)

For independent processing of the HARQ process, the HARQ group can be arranged as follows.

6 is a timing chart showing a first embodiment of the arrangement of HARQ groups.

Referring to FIG. 6, the arrangement interval of the same HARQ group may be "0 TTI ", and the HARQ processing operation in HARQ group # 0 may be performed within one TTI. For example, a processing operation for a HARQ process belonging to HARQ group # 0 in TTI # 0 and # 1 can be performed. Here, the number of the HARQ process ID may be sequentially increased or decreased by one.

7 is a timing chart showing a second embodiment of the arrangement of HARQ groups.

Referring to FIG. 7, the arrangement interval of the same HARQ group may be "1 TTI ", and HARQ processing operations in HARQ groups # 0 and # 1 may be performed in two TTIs. For example, a processing operation for a HARQ process belonging to HARQ group # 0 can be performed in TTI # 0 to # 1, a processing operation for a HARQ process belonging to HARQ group # 1 in TTI # 1 to # 2 is performed .

8 is a timing diagram showing a third embodiment of the arrangement of HARQ groups.

Referring to FIG. 8, the arrangement interval of the same HARQ group may be "2 TTI ", and the HARQ processing operation in each of HARQ groups # 0 to # 2 may be performed in three TTIs. For example, a processing operation for an HARQ process belonging to HARQ group # 0 can be performed in TTI # 0 to # 2, and a processing operation for an HARQ process belonging to HARQ group # 1 in TTI # 1 to # 3 is performed And a processing operation for HARQ processes belonging to HARQ group # 2 in TTI # 2 to # 4 can be performed.

Also, when MIMO-based spatial multiplexing is performed in a communication system, HARQ groups may be set differently for each transport block (TB). For example, the HARQ group can be arranged as follows.

9 is a timing diagram showing a fourth embodiment of the arrangement of HARQ groups.

Referring to FIG. 9, the allocation interval of the same HARQ group may be "0 TTI ", and different HARQ groups may be set for each transport block (TB). For example, a processing operation for the HARQ process belonging to the HARQ group # 0 can be performed in the transmission block TB # 0, a processing operation for the HARQ process belonging to the HARQ group # 1 in the transmission block TB # Can be performed.

10 is a timing chart showing a fifth embodiment of the arrangement of HARQ groups.

Referring to FIG. 10, the allocation interval of the same HARQ group may be "1 TTI ", and different HARQ groups may be set for each transport block (TB). For example, a processing operation for a HARQ process belonging to HARQ group # 0 can be performed in TTI # 0 of a transmission block (TB) # 0, and a HARQ process can be performed in HARQ group # 2 The processing operation for the HARQ process belonging to the HARQ process can be performed. The processing operation for the HARQ process belonging to the HARQ group # 1 can be performed in the TTI # 0 of the transport block TB # 1 and the HARQ process belonging to the HARQ group # 3 in the TTI # 1 of the transport block TB # Can be performed.

11 is a timing chart showing a sixth embodiment of the arrangement of HARQ groups.

Referring to FIG. 11, the allocation interval of the same HARQ group may be "2 TTI ", and different HARQ groups may be set for each transport block (TB). For example, a processing operation for a HARQ process belonging to HARQ group # 0 can be performed in TTI # 0 of a transmission block (TB) # 0, and a HARQ process can be performed in HARQ group # 2 The processing operation for the HARQ process belonging to HARQ group # 4 in the TTI # 2 of the transmission block TB # 0 can be performed. The processing operation for the HARQ process belonging to the HARQ group # 1 can be performed in the TTI # 0 of the transport block TB # 1 and the HARQ process belonging to the HARQ group # 3 in the TTI # 1 of the transport block TB # And the processing operation for the HARQ process belonging to the HARQ group # 5 in the TTI # 2 of the transmission block TB # 1 can be performed.

In addition, when spatial multiplexing is performed, HARQ groups may be separately designated for transport blocks (TB) implicitly and independently, even if HARQ groups are set for each transport block (TB). That is, even if the HARQ group is set to the same HARQ group for each transport block TB in FIG. 9 to FIG. 11, the HARQ group can be implicitly regarded as a separate HARQ group.

When a HARQ group is set for each transport block (TB) in FIGS. 9 to 11, a "decoder-memory" may be configured as shown in FIG. That is, a HARQ memory group, a memory controller group, and a decoder group for each of the transport blocks (TBs) in the HARQ group can be set.

■ HARQ  The placement (or assignment)

If the number of HARQ groups is K and the number of any HARQ process ID is j, the HARQ process IDs with the same "j mod K" result may be set to the same HARQ group (e.g. HARQ memory group) . If the number of HARQ process IDs is N and "N mod K = 0 ", the execution interval of a HARQ processing operation (e.g., processing operation of the same HARQ process ID) causing a collision is maximized .

On the other hand, when "N mod K ≠ 0", it is assumed that HARQ process ID #j is allocated to HARQ group # (j mod K), "floor (N / K ) * K "HARQ process IDs #j are allocated to HARQ group # (j mod K) and HARQ process IDs #j belonging to the last HARQ group" N mod K "remaining (for example, TTI (One of the HARQ process IDs #j that satisfy "floor (j / K) = floor (N / K)") and the first HARQ group (E.g., HARQ process ID # j 'satisfying the floor (j' / K) = 0) belonging to the HARQ process ID # j 'belonging to the first HARQ process group (for example, one of the first K HARQ memory groups) May be "N mod K &quot;. "N mod K K / 2 ", HARQ process ID #j may be placed in HARQ group # (j mod K). In this case, the arrangement interval of the same HARQ group can always be K / 2 or more. That is, when "N mod K ≠ 0" and "N mod K ≥ K / 2", the configuration of the HARQ group may be as shown in FIG. Here, the HARQ group may be the same for each column.

"Floor (N / K) * K" number of HARQ process IDs #j (for example, # 0 to # (floor ( (K / 2) + (N / K) * K-1) may be allocated to the HARQ group # (j mod K) and the remaining N mod K HARQ process IDs #j may be allocated to the HARQ group # j mod K). In this case, the minimum value of the spacing interval between the last HARQ process ID #j of the "N mod K" and the remaining HARQ process #j 'that belongs to the first HARQ group that can be further grouped by K is (K / 2 + j mod K), which is always greater than K / 2. Therefore, "min (S) = K / 2" is established because the minimum value of the HARQ group allocation interval S is K / 2 or more for all the Ks in the state of "N mod K ≠ 0". Accordingly, "min (S) = K / 2 ≥ L" must be established, and in this case, the number K of HARQ groups can be selected to satisfy "K ≥ 2L". That is, when "N mod K ≠ 0" and "N mod K <K / 2", the configuration of the HARQ group may be as shown in FIG. Here, the same HARQ group may be used for each column. In this case, since the minimum arrangement interval of the HARQ process ID is K / 2, not K, the selection range of K can be reduced. Therefore, it may be advantageous that the total number N of HARQ process IDs is set to a multiple of K. [

In general, if the N mod K < K / x (x is a natural number of 2 or more), N mod K HARQ process IDs # j are allocated to HARQ group # ) (where beta is an arbitrary real number equal to or larger than 1 / x and equal to or smaller than 1), the arrangement interval of the HARQ process can always be K / x or more.

The arrangement interval of HARQ process IDs can be set based on other methods other than the method described above. The arrangement interval of the HARQ process IDs can be set according to the operation status of the HARQ retransmission procedure (e.g., the execution time of the HARQ process operation of the decoder or the encoder). The arrangement interval of the HARQ process IDs may be larger than the execution time of the HARQ process operation. Here, it will be emphasized again that the methods of grouping the HARQ process IDs are merely examples for ease of explanation. As described above, the method of disposing the HARQ process IDs can not be completely explained because of a myriad of situations, and accordingly, the HARQ process ID is simply increased or decreased according to the TTI, Is an example of how to group HARQ process IDs using a result of "j mod K" to obtain a placement interval of L TTI or more for each HARQ group in a situation where the HARQ process ID is operated.

The above situation assumes that the HARQ process ID #j is located at TTI #t (t = j). If there is an empty TTI or does not operate in a sequential increase form according to the situation, Process ID #j may be placed at TTI #t (j # t). In this case, it is necessary to consider the TTI #t together with the HARQ process ID #j in order to obtain the arrangement interval for each HARQ process ID. In this case, the HARQ process ID #j may be used instead of the HARQ process ID #j to determine the allocation interval based on the TTI number #t in the HARQ RTT, configure the HARQ group, and then store the HARQ process #j allocated to the corresponding TTI. That is, the HARQ process ID #j may be interpreted as the HARQ process ID #j 'of the t-th TTI in the HARQ RTT according to the situation.

That is, the essential point of the present invention is that the HARQ process IDs having the arrangement interval exist in the same HARQ group and the HARQ process ID arrangement interval S belonging to the same HARQ group is longer than the HARQ process time L It is important to operate HARQ. Therefore, if there is a placement interval between HARQ process IDs, placement of HARQ process IDs belonging to the same HARQ group through another form (for example, another formula, table, or separate signaling, etc.) The interval S can be grouped so as to be equal to or greater than L TTI.

Together, the HARQ process IDs can be mapped to HARQ groups by the HARQ group mapping function, so that the HARQ process IDs can be grouped. Here, an input of the HARQ group mapping function may be a HARQ process ID and an HARQ process processing time, and an output of the HARQ group mapping function may be a HARQ group. In this case, the arrangement interval of the HARQ groups may be longer than the HARQ process processing time. The above-described embodiment can be an example of a case where the HARQ group mapping function is "j mod K ". If spatial multiplexing is performed, the number of the transport block TB may be added as an input of the HARQ group mapping function. Also, when the HARQ group changes with time, the TTI number may be added as an input of the HARQ group mapping function.

For example, in the case of "N = 8" and "K = 4", the HARQ process ID in the HARQ group can be set as shown in Table 1 below. When the execution time of the HARQ process operation is "1 TTI ", the arrangement interval of HARQ process IDs belonging to the same HARQ group can be set to be equal to or larger than" 1 TTI ".

&Lt; RTI ID = 0.0 &gt; (L) &lt;

The performance time L of the HARQ processing operation can be set based on the performance of the decoder (or encoder), the size of the transport block corresponding to the HARQ process ID, the LLR bit width, and the like.

Meanwhile, a method of setting the HARQ parameters (for example, K, N, M, S, HARQ process ID, L in the HARQ group) described above may be as follows.

- Setting Method # 1: The HARQ parameters may be predefined in the specification, and the communication node (e.g., transmitter and receiver) may set the HARQ group based on the HARQ parameters defined in the specification, HARQ processes can be handled based on HARQ groups.

- Setting Method # 2: "Batch interval of HARQ group" and "HARQ process ID in HARQ group" can be signaled to a communication node (eg, transmitter or receiver). The communication node may estimate (or compute) the remaining HARQ parameters (e.g., K, N, M, S) based on the signaled HARQ parameters and may estimate the signaled HARQ parameters and the estimated HARQ &lt; / RTI &gt; parameters), and can process the HARQ process based on the set HARQ group. Alternatively, the communication node can set the HARQ group based on the signaled HARQ parameters and the remaining HARQ parameters defined in the specification, and can process the HARQ process based on the set HARQ group.

- Setting Method # 3: N can be defined in the specification, in which case the communication node can estimate (or calculate) the remaining HARQ parameters (e.g., M, K, S, etc.) has exist. Therefore, the communication node can set the HARQ group based on the HARQ parameters defined in the standard and the estimated (or computed) HARQ parameters, and can process the HARQ process based on the set HARQ group.

- Setting Method # 4: The transmitter transmits at least one of the HARQ parameters to at least one of a radio resource control (RRC) signaling procedure, a system information transmission procedure, and a transmission procedure of control information (e.g., downlink control information (DCI) To the receiver. The receiver can configure the HARQ group based on the at least one HARQ parameter received from the transmitter, and can process the HARQ process based on the set HARQ group. Here, the HARQ parameters can be set by the transmitter.

- Setting method # 5: The receiver can provide the information (for example, the number of decoders of the receiver, the HARQ process processing time, etc.) which the transmitter does not know from the information necessary for setting the HARQ group at the transmitter, The HARQ parameters can be set by knowing the configuration of the receiver. The transmitter may selectively inform the receiver of necessary information (e.g., HARQ process ID-HARQ group mapping relationship or TTI number-HARQ group mapping relationship) among the set HARQ parameters.

12 is a flowchart showing a first embodiment of a processing method of the HARQ process.

Referring to FIG. 12, each of the transmitter and the receiver may be configured to be the same as or similar to the communication node 200 shown in FIG. In addition, the transmitting and receiving devices of each of the transmitter and the receiver may be the same or similar to the transmitting and receiving device 230 shown in FIG. In the downlink communication, the transmitter may be a base station, and the receiver may be a terminal. In uplink communication, the transmitter may be a terminal and the receiver may be a base station. In D2D communication, the transmitter may be the first terminal, and the receiver may be the second terminal.

In step S1200, each of the transmitter and the receiver can set up one or more HARQ groups based on the HARQ parameters. The HARQ parameters may include K, N, M, a HARQ group allocation interval, a HARQ process ID in a HARQ group, a HARQ process operation execution time, and the like. The HARQ parameters may be set based on the setting methods # 1 to # 4 described above, and the HARQ group may be set to be the same as or similar to the HARQ group shown in FIG. Also, in step S1200, HARQ process IDs may be allocated (or assigned) to each of one or more HARQ groups.

The transmitter may transmit a transmission block (e.g., a data packet) per HARQ process ID to the receiver (S1210). The receiver can receive the transmission block from the transmitter and can perform the demodulation operation on the transmission block (S1220). Also, the receiver can perform a demapping operation on the demodulated transport block (S1230), and store the demapped transport block in the HARQ memory group (S1240). Here, the demapped transport block may be an LLR value. The receiver (e.g., demapper 233-3 of the receiver) can determine the HARQ memory group in which the demapped transport block is to be stored based on the HARQ process ID of the demapped transport block. For example, if the number of the HARQ process ID of the de-mapped transport block belongs to 0 to N ₀ -1, the receiver (e.g., demapper 233-3 of the receiver) 5 HARQ memory group # 0.

The receiver (e.g., decoder 233-1 of the receiver) may perform a decoding operation on the demapped transport block stored in the HARQ memory group (S1250). For example, a receiver (e.g., decoder 233-1 of a receiver) can identify a HARQ memory group in which a demapped transport block corresponding to a HARQ process ID to be processed is stored, It is possible to acquire a transport block demapped from the corresponding HARQ memory group by performing a connection request and perform a decoding operation on the obtained demapped transport block. If the number of the HARQ process ID to be processed belongs to 0 to N ₀ -1, the receiver (e.g., decoder 233-1 of the receiver) may make a memory access request to the memory controller group # 0 of FIG. 5 , It can acquire the demapping transport block corresponding to the HARQ process ID by accessing to the HARQ memory group # 0 according to the memory access request, and perform decoding operation on the obtained demapping transport block.

The methods according to the present invention can be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the computer readable medium may be those specially designed and constructed for the present invention or may be available to those skilled in the computer software.

Examples of computer readable media include hardware devices that are specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those generated by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate with at least one software module to perform the operations of the present invention, and vice versa.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. It will be possible.

Claims (20)

A method of operating a first communication node in a communication system,
Establishing one or more hybrid automatic repeat request (HARQ) groups; And
And placing an HARQ process identifier in each of the one or more HARQ groups,
Each of the one or more HARQ groups performs decoding based on data stored in the HARQ memory group by accessing the HARQ memory group, a memory controller group controlling the HARQ memory group, and the HARQ memory group through the memory controller group A decoder group,
Wherein the allocation interval of HARQ process IDs belonging to each of the one or more HARQ groups is equal to or greater than a processing time of one HARQ process. The method according to claim 1,
Wherein the parameters used to configure the one or more HARQ groups are received via at least one of a radio resource control (RRC) signaling procedure, a system information transmission procedure, and a control information transmission procedure. The method according to claim 1,
Wherein the one or more HARQ groups are set based on the total number of HARQ process IDs, the total number of decoders belonging to the one or more HARQ groups, and the processing time of the HARQ process. The method according to claim 1,
The HARQ process ID is j, the processing time of the HARQ process is L, the number of the transmission block is b, the transmission time interval (TTI) number is t, and the mapping function is input j, L, the transmission blocks of the HARQ process ID #j having the same result according to the mapping function are arranged in the same HARQ group. The method according to claim 1,
If the total number of one or more HARQ groups is K and the number of any HARQ process ID is j, the HARQ process ID #j having the same "j mod K" result is placed in the same HARQ group, Lt; / RTI &gt; The method according to claim 1,
Wherein N is an integer equal to or greater than 1 and equal to or greater than 1 and x is a natural number equal to or greater than 2 and? Is equal to or greater than 1 / x and equal to or less than 1, wherein N is a total number of HARQ processes "N mod K" HARQ process IDs #j, excluding "floor (N / K) * K" HARQ process IDs set to HARQ group among N HARQ process IDs, lt; / RTI &gt; (j &lt; / RTI &gt; mod K). The method according to claim 1,
The method of claim 1,
Receiving a transport block from a second communication node;
Performing a demodulation operation on the transport block;
Performing a demapping operation on the demodulated transport block;
Determining an HARQ memory group in which the demapped transport block is stored based on a HARQ process ID of the demapped transport block;
Acquiring and combining the demapped transport block from the identified HARQ memory group;
Storing the combined transport block in the HARQ memory group; And
And performing a decoding operation on the combined transport block. The method according to claim 1,
Wherein configuring the one or more HARQ groups comprises:
Transmitting allocation interval information for each HARQ group to a second communication node;
Receiving parameters from the second communication node based on the allocation interval information for each HARQ group; And
And setting the one or more HARQ groups using the parameters. A method of operating a first communication node in a communication system,
Setting parameters used to set one or more hybrid automatic repeat request (HARQ) groups; And
And transmitting the parameters to a second communication node,
Each of the one or more HARQ groups includes a HARQ memory group, a memory controller group for controlling the HARQ memory group, and a decoder for decoding data stored in the HARQ memory group by accessing the HARQ memory group through the memory controller group, Group,
Wherein the parameters include at least one of a total number of one or more HARQ groups, a total number of HARQ process IDs belonging to the at least one HARQ group, a total number of decoders belonging to the at least one HARQ group, The HARQ process ID being located in the HARQ groups and the processing time of the HARQ process. The method of claim 9,
Wherein the parameters are set based on batch interval information per HARQ group received from the second communication node. The method of claim 9,
Wherein the parameters are transmitted via at least one of a radio resource control (RRC) signaling procedure, a system information transmission procedure, and a control information transmission procedure. The method of claim 9,
Wherein the allocation interval of HARQ process IDs belonging to each of the one or more HARQ groups is equal to or greater than a processing time of one HARQ process. The method of claim 9,
The HARQ process ID is j, the processing time of the HARQ process is L, the number of the transmission block is b, the transmission time interval (TTI) number is t, and the mapping function is input j, L, the transmission blocks of the HARQ process ID #j having the same result according to the mapping function are arranged in the same HARQ group. The method of claim 9,
If the total number of one or more HARQ groups is K, the total number of HARQ process IDs is N, and the number of any HARQ process ID among the N HARQ process IDs is j, the same "j mod K" The HARQ process IDs are placed in the same HARQ group. The method of claim 9,
Wherein N is an integer equal to or greater than 1 and equal to or greater than 1 and x is a natural number equal to or greater than 2 and? Is equal to or greater than 1 / x and equal to or less than 1, wherein N is a total number of HARQ processes "N mod K" HARQ process IDs #j, excluding "floor (N / K) * K" HARQ process IDs set to HARQ group among N HARQ process IDs, lt; / RTI &gt; (j &lt; / RTI &gt; mod K). A communication node in a communication system,
A processor; And
Wherein the at least one instruction executed by the processor comprises a stored memory,
Wherein the at least one instruction comprises:
Establish one or more hybrid automatic repeat request (HARQ) groups; And
And to place an HARQ process identifier in each of the one or more HARQ groups,
Each of the one or more HARQ groups includes a HARQ memory group, a memory controller group for controlling the HARQ memory group, and a decoder for decoding data stored in the HARQ memory group by accessing the HARQ memory group through the memory controller group, Group,
Wherein the allocation interval of HARQ process IDs belonging to each of the one or more HARQ groups is equal to or greater than a processing time of one HARQ process. 18. The method of claim 16,
Wherein the one or more HARQ groups are set based on a total number of decoders belonging to the one or more HARQ groups, a processing time of the HARQ process. 18. The method of claim 16,
The HARQ process ID is j, the processing time of the HARQ process is L, the number of the transmission block is b, the transmission time interval (TTI) number is t, and the mapping function is input j, L, t, the transmission blocks of the HARQ process ID #j having the same result according to the mapping function are placed in the same HARQ group. 18. The method of claim 16,
Wherein N is an integer equal to or greater than 1 and equal to or greater than 1 and x is a natural number equal to or greater than 2 and? Is equal to or greater than 1 / x and equal to or less than 1, wherein N is a total number of HARQ processes "N mod K" HARQ process IDs #j, excluding "floor (N / K) * K" HARQ process IDs set to HARQ group among N HARQ process IDs, beta &lt; / RTI &gt; + (j mod K). 18. The method of claim 16,
Wherein the at least one command, when setting the one or more HARQ groups,
To the second communication node, allocation interval information per HARQ group;
Receiving parameters from the second communication node based on the HARQ-group allocation interval information; And
And to set the one or more HARQ groups using the parameters.

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