CN113726487B - Method and device for determining redundancy version - Google Patents
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- H—ELECTRICITY
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Abstract
The invention discloses a method and a device for determining redundancy versions, relates to the field of communication, and solves the problem that the existing method for determining redundancy versions is uneven in redundancy use of each version. Acquiring the length N of current actual retransmission data and the redundancy version number A of the current actual retransmission data; acquiring the length M of preset retransmission data; and if the length N of the current actual retransmission data is smaller than the length M of the preset retransmission data, determining that the redundancy version number of the next actual retransmission data is A, and the length of the next actual retransmission data is M-N.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and an apparatus for determining a redundancy version.
Background
After receiving a data packet that cannot be decoded, the receiving end usually discards the data packet and receives a retransmitted data packet. The discarded data contains useful information, and in order to make effective use of the useful information, it is necessary to store the data packet that cannot be decoded and combine it with the subsequently received retransmitted data packet, thereby obtaining a data packet that is easier to decode. In order to make the merged data packet easier to decode, the data packet needs to be retransmitted for many times, and the data in each data packet is the same. Different versions of redundancy are added to the data packets retransmitted for multiple times respectively (the data packets added with redundancy may be referred to as redundancy retransmission). Because the code words in the redundancies of different versions are complementary and equivalent, the decoding information in the combined data packet can be more comprehensive and the correct decoding can be more favorably realized by combining the data packet retransmitted at the previous time and the data packet retransmitted at the next time.
With the development of communication technologies, the requirements of new communication technologies on the communication delay and the communication reliability are greatly increased, so that a cross-boundary redundant retransmission scheme (i.e., one retransmission can span multiple time slots) is generated. Under this scheme, if a retransmission spans multiple slots, the retransmission is divided into multiple actual retransmissions. By adopting the existing method for determining the redundancy version, a plurality of actual retransmissions adopt the redundancy of different versions, so that the redundancy of each version is unevenly used, the repetition among retransmission data is increased, and the transmission performance is influenced.
Disclosure of Invention
The invention provides a method and a device for determining redundancy versions, which are used for solving the problem that the existing method for determining the redundancy versions is uneven in redundancy use of each version.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a method for determining redundancy versions, including: acquiring the length N of current actual retransmission data and the redundancy version number A of the current actual retransmission data; acquiring the length M of preset retransmission data; and if the length N of the current actual retransmission data is less than the length M of the preset retransmission data, determining the redundancy version number of the next actual retransmission data as A and the length of the next actual retransmission data as M-N.
The invention judges whether the retransmission is segmented according to the length of the actual retransmission data and the length of the preset retransmission data, determines that the redundancy version of the next retransmission data is the same as the redundancy version of the current retransmission data under the condition that the retransmission data is segmented (namely the length of the actual retransmission data is less than the length of the preset retransmission data), and determines that the length of the next retransmission data is (the length of the preset retransmission data-the length of the actual retransmission data), so that the sum of the length of the current actual retransmission data and the length of the next retransmission data is the same as the length of the preset retransmission data, thereby ensuring that the redundancy of each version is uniformly used and solving the problem that the redundancy of each version is not uniformly used by the existing determination method of the redundancy version.
In a second aspect, the present invention provides an apparatus for determining redundancy version, the apparatus comprising: the device comprises a first acquisition unit, a second acquisition unit and a first determination unit. A first obtaining unit, configured to obtain a length N of current actual retransmission data and a redundancy version number a of the current actual retransmission data; a second obtaining unit, configured to obtain a length M of the preset retransmission data; the first determining unit is configured to determine that the redundancy version number of the next actual retransmission data is a and the length of the next actual retransmission data is M-N, if the length N of the current actual retransmission data is smaller than the length M of the preset retransmission data.
In a third aspect, the present invention provides a computer-readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a redundancy version determination apparatus, cause the redundancy version determination apparatus to perform the method of determining a redundancy version according to the first aspect.
In a fourth aspect, the present invention provides a computer program product comprising instructions which, when run on a redundancy version determination apparatus, cause the redundancy version determination apparatus to perform the method of determining a redundancy version according to the first aspect.
In a fifth aspect, the present invention provides an apparatus for determining redundancy versions, including: a processor and a memory, the memory being used to store a program, the processor calling the program stored in the memory to perform the method of determining the redundancy version as described in the first aspect.
Reference may be made to the detailed description of the first aspect and various implementations thereof for specific descriptions of the second to fifth aspects and various implementations thereof in the present disclosure; moreover, the beneficial effects of the second aspect to the fifth aspect and the various implementation manners thereof may refer to the beneficial effect analysis of the first aspect and the various implementation manners thereof, and are not described herein again.
These and other aspects of the invention will be more readily apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an apparatus for determining redundancy versions according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a time domain resource unit according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a method for determining a redundancy version according to an embodiment of the present invention;
fig. 5 is a schematic diagram of another time domain resource unit according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a location of predetermined retransmission data according to an embodiment of the present invention;
fig. 7 is a schematic diagram of another time domain resource unit according to an embodiment of the present invention;
fig. 8 is a schematic diagram of another apparatus for determining redundancy versions according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The method for determining the redundancy version provided by the embodiment of the invention is suitable for a communication system. As shown in fig. 1, the communication system may include a network device 100 and a terminal 200. The network device 100 may retransmit the data to the terminal 200 through the downlink channel. The downlink channel includes, but is not limited to, a Physical Downlink Control Channel (PDCCH), a Physical Downlink Shared Channel (PDSCH), a Physical Random Access Channel (PRACH), and a Physical Broadcast Channel (PBCH). The terminal 200 may retransmit the data to the network device 100 through the uplink channel. The uplink channel includes, but is not limited to, a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), and a Physical Random Access Channel (PRACH).
The communication system described in the embodiment of the present invention may be a second generation mobile communication technology (2th generation, 2G), a third generation mobile communication technology (3th generation, 3G), a fourth generation mobile communication technology (4th generation, 4G), a 5G communication system, a system in which multiple communication systems are integrated, or a future evolution network. Such as Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), Long Term Evolution (LTE) systems, new air interface (NR) systems, wireless fidelity (WiFi) systems, world wide internet protocol (world interoperability for microwave access (WiMAX) systems, and other third generation partnership project (3 GPP) related systems.
The network device 100 described in the embodiment of the present invention may be any device with a wireless transceiving function, including but not limited to: a base station (BTS) in a Global System for Mobile (GSM) or CDMA, a base station (NodeB) in WCDMA, an evolved Node B (NodeB or eNB or e-NodeB) in LTE, a base station (gnnodeb or gNB) or a transmission point (TRP) in NR, a base station of a subsequent evolution of 3GPP, an access Node in a WiFi system, a wireless relay Node, a wireless backhaul Node, and the like.
The base station may be: macro base stations, micro base stations, pico base stations, small stations, relay stations, etc. Multiple base stations may support the same technology network as mentioned above, or different technologies networks as mentioned above. A base station may include one or more Transmission Receiving Points (TRPs) that are co-sited or non-co-sited.
The network device 100 may also be a wireless controller, a Centralized Unit (CU), and/or a Distributed Unit (DU) in a Cloud Radio Access Network (CRAN) scenario. The network device may also be a server, a wearable device, or a vehicle mounted device, etc. The following description will take the network device 100 as a base station as an example. The multiple network devices may be base stations of the same type or base stations of different types. The base station may communicate with the terminal device, and may also communicate with the terminal device through the relay station. The terminal device may communicate with a plurality of base stations of different technologies, for example, the terminal device may communicate with a base station supporting an LTE network, may communicate with a base station supporting a 5G network, and may support dual connectivity with the base station of the LTE network and the base station of the 5G network.
The terminal 200 described in the embodiment of the present invention is a device with a wireless transceiving function, and can be deployed on land, including indoors or outdoors, handheld, wearable, or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in home (smart home), and so on. The embodiment of the invention does not limit the application scenarios.
Terminal 200 may also be referred to at times as a terminal device, User Equipment (UE), access terminal device, UE unit, UE station, mobile station, remote terminal device, mobile device, UE terminal device, wireless communication device, UE agent, or UE apparatus, etc. The terminals may also be fixed or mobile.
The execution main body of the method for determining the redundancy version provided by the embodiment of the invention is a device for determining the redundancy version. The device for determining the redundancy version may be the network device 100, or may be a CPU in the network device 100, or may be a control module in the network device 100 for determining the redundancy version, or may be the terminal 200, or may be a CPU in the terminal 200, or may be a control module in the terminal 200 for determining the redundancy version. The embodiment of the present invention does not limit this.
Fig. 2 shows a hardware configuration of the redundancy version determination apparatus 300. As shown in fig. 2, the redundancy version determining apparatus 300 may include at least one processor 301, a communication line 302, a memory 303, and a communication interface 304. Specifically, the method comprises the following steps:
a processor 301 for executing computer-executable instructions stored in memory 303 to implement the steps or acts of the redundancy version determination apparatus 300.
The processor 301 may be a chip. For example, the Field Programmable Gate Array (FPGA) may be an Application Specific Integrated Circuit (ASIC), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), a Micro Controller Unit (MCU), a Programmable Logic Device (PLD) or other integrated chips.
A communication line 302 for transmitting information between the processor 301 and the memory 303.
A memory 303 for storing computer executable instructions and controlled by the processor 301.
The memory 303 may be separate and coupled to the processor via the communication line 302. The memory 303 may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM). It should be noted that the memory of the systems and apparatus described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
A communication interface 304 for communicating with other devices or a communication network. The communication network may be an ethernet, a Radio Access Network (RAN), or a Wireless Local Area Network (WLAN).
To facilitate the technical solutions of the embodiments of the present invention, some terms or concepts related to the present invention will be described below with reference to fig. 3. Fig. 3 is a schematic diagram of time domain resource units.
The redundancy version number, which may also be referred to as RV (for example, RVA indicates redundancy with a version number of a), is used to indicate that one or more code blocks are obtained after encoding transmitted information bits, data bits are cut from different positions of the code block or code block sequence and are rearranged as starting data bits, the arranged data are modulated and then mapped onto corresponding time-frequency resources, or the redundancy version number is used to indicate that one code block is obtained after encoding transmitted information bits, the code block is divided into a plurality of different sub-code blocks, different sub-code blocks are mapped onto different time-frequency positions, and different sub-code blocks may correspond to different RVs.
For example, 4 different RVs are used for data 4 times transmission, four different start positions of the intercepted data are arranged in the same information bit by the 4 different RVs, the intercepted data are mapped to corresponding frequency domain positions after being modulated, which also means that the same information bit is mapped to different frequency domain positions, when the information bit passes through a channel with stronger frequency selectivity, the same information bit can be demodulated from different frequency domain positions, and has better frequency selectivity gain, thereby obtaining higher demodulation and decoding performance. It is understood that other numbers of RVs, such as 6 RVs, or 8 RVs, etc., may be used depending on system requirements. In the present invention, 4 RVs are exemplified.
The time domain resource unit represents a period of time, and may be, for example, a symbol, a micro slot, a subframe, a radio frame, or a sampling point. The embodiment of the present invention is described by taking an example that a time domain resource unit has 2 slots, where one slot corresponds to one number (for example, two slots in fig. 3 correspond to the number 2N and the number 2N +1, respectively), and one slot includes multiple windows (for example, one slot in fig. 3 includes 14 windows), and each window corresponds to one symbol index (for example, 0 to 13 in fig. 3).
The following is combined with the communication system shown in fig. 1, the redundancy version determination apparatus 300 shown in fig. 2, and the time domain resource unit shown in fig. 3.
A method for determining a redundancy version provided in an embodiment of the present invention is described.
As shown in fig. 4, a method for determining a redundancy version provided in an embodiment of the present invention includes:
s401, the device for determining redundancy version 300 obtains the length N of the current actual retransmission data and the redundancy version number a of the current actual retransmission data.
As can be seen from the above description, the length of the actual retransmission data and the length of the preset retransmission data may be different. In order to ensure the correctness of the redundancy version, the device 300 for determining the redundancy version acquires the length N of the current actual retransmission data and the redundancy version number a of the current actual retransmission data, so as to subsequently determine the redundancy version number and the length of the next actual retransmission data according to the acquired length and the redundancy version number.
Illustratively, the time domain resource unit shown in fig. 3 includes 2 slots (slot 2n and slot 2n +1), each slot containing 14 windows (window 0-window 13). In the time domain resource unit, it is assumed that the number of times of the predetermined retransmission data is 4, and the length of each predetermined retransmission data is 5 symbols. If the starting position of the first predetermined retransmission data is the window 4 in the time slot 2n, it can be known from fig. 3 that: each preset retransmission data in the 4 preset retransmission data is in a time slot, and the preset retransmission data is not segmented. In this case, the length of each actual retransmission data is the same as the length of the preset retransmission data. If the starting position of the current actual retransmission data is the window 9 in the time slot 2n, it can be known from fig. 3 that the redundancy version number of the current actual retransmission data is 3, and the length of the current retransmission data is 5 symbols. In this case, the length of the actual retransmission data acquired by the redundancy version determination device 300 is 5, and the redundancy version number of the actual retransmission data is 3.
Further illustratively, the time domain resource unit shown in fig. 5 includes 2 slots (slot 2n and slot 2n +1), each slot containing 14 windows (window 0-window 13). In the time domain resource unit, it is assumed that the number of times of the predetermined retransmission data is 4, and the length of each predetermined retransmission data is 5 symbols. If the starting position of the first predetermined retransmission data is window 1 of slot 2n, it can be known from fig. 5 that: the first preset retransmission data, the second preset retransmission data and the fourth preset retransmission data are all in one time slot, and no segmentation occurs; the third pre-determined retransmission data is in slot 2n and slot 2n +1, and fragmentation occurs. If the starting position of the current actual retransmission data is the window 11 in the time slot 2n, referring to fig. 5, it can be known that, since the third predetermined retransmission data is segmented and is divided into two actual retransmission data, the length of the current actual retransmission data is 3 symbols, and the redundancy version number of the current actual retransmission data is 3. The determination apparatus 300 of redundancy version obtains that the length of the actual retransmission data is 3 symbols and the redundancy version number of the actual retransmission data is 3.
Optionally, the length N of the actual retransmission data and the redundancy version number a of the actual retransmission data may be obtained by configuring a Time Domain Resource Allocation (TDRA) table.
S402, the device 300 for determining redundancy version obtains the length M of the predetermined retransmission data.
For example, the length of each predetermined retransmission data in the time domain resource unit shown in fig. 3 is 5 symbols, and the redundancy version determining apparatus 300 obtains the length of the predetermined retransmission data as 5 symbols.
For another example, the length of each predetermined retransmission data in the time domain resource unit shown in fig. 5 is 5 symbols, and the apparatus 300 for determining redundancy version obtains the length of the predetermined retransmission data as 5 symbols.
Optionally, the length of the preset retransmission data and the number of times of the preset retransmission data may be obtained through a TDRA table.
S403, the device 300 for determining redundancy version determines whether the length N of the current actual retransmission data is smaller than the length M of the preset retransmission data.
The redundancy version determination device 300 performs S404 if the length N of the actual retransmission data is smaller than the length M of the preset retransmission data.
For example, the length of the retransmission data preset in the time domain resource unit shown in fig. 5 is 5 symbols, and the length of the actual retransmission data obtained by the redundancy version determining device 300 is 3 symbols. The length (3 symbols) of the actual retransmission data is smaller than the length (5 symbols) of the preset retransmission data, and the redundancy version determination apparatus 300 performs S404.
S404, the redundancy version determining device 300 determines that the redundancy version number of the next actual retransmission data is a, and the length of the next actual retransmission data is M-N.
In the time domain resource unit shown in fig. 5, the length of each preset retransmission data is 5 symbols, and the redundancy version number of the actual retransmission data obtained by the redundancy version determining device 300 is 3. The length of the actual retransmission data is 3 symbols. The redundancy version determining apparatus 300 determines that the next retransmission data has a redundancy version number of 3 and a length of 2(5-3) symbols.
Optionally, the method for determining a redundancy version provided in the embodiment of the present invention further includes:
and determining that the first data in the next actual retransmission data is positioned the same as the last data of the current actual retransmission data.
For ease of understanding, fig. 6 is introduced below for explanation. As shown in fig. 6, fig. 6 is a schematic diagram of a position of the predetermined retransmission data, and the number of times of the predetermined retransmission data is 4. The first predetermined retransmission data positions are s-rv0 through s-rv 1. The first data position of the first predetermined retransmission data is s-rv0, and the last data position of the first predetermined retransmission data is s-rv 1. The second predetermined retransmission data positions are s-rv1 through s-rv 2. The first data position of the second predetermined retransmission data is s-rv1, and the last data position of the second predetermined retransmission data is s-rv 2. The third predetermined retransmission data positions are s-rv2 through s-rv 3. The first data position of the third pre-set retransmission data is s-rv2, and the last data position of the third pre-set retransmission data is s-rv 3. The fourth pre-determined retransmission data positions are s-rv3 through s-rv 0. The first data position of the fourth pre-set retransmission data is s-rv3, and the last data position of the fourth pre-set retransmission data is s-rv 0. The first data of the data is data of 1bit (bit) in the data, and the last data of the data is data of the last 1bit in the data. When the preset retransmission data is segmented, one or more segmented data positions are generated between the first data position of the preset retransmission data and the last data position of the preset retransmission data, and the number of the segmented data positions is related to the segmentation frequency of the preset retransmission data. Assuming that a segment occurs for each of the 4 times of the predetermined retransmission data, 4 segmented data positions are generated, which are s0, s1, s2 and s 3. Taking s0 as an example for illustration, s0 is a first segment data position generated by the first retransmission data generation segment, the first retransmission data generation segment is divided into two actual retransmission data, and the two retransmission data positions are s-rv0 to s0 and s0 to s-rv1, respectively. Referring to fig. 6, it can be seen that the last data position (s0) in the first actual retransmission data and the first data position in the second actual retransmission data are the same and are both s 0.
The method for determining the redundancy version provided by the embodiment of the invention further comprises the following steps:
and determining the next retransmission data according to the number of the time slot in which the current actual retransmission data is positioned.
If the number of the time slot in which the previous actual retransmission data is located is an odd number, the next retransmission data is the first half of the preset retransmission data. Referring to fig. 6, the first half of the retransmission-scheduled data is data corresponding to the first data position to the segmented data position of the retransmission-scheduled data.
If the number of the time slot where the previous actual retransmission data is located is an even number, the next retransmission data is the second half of the preset retransmission data. Referring to fig. 6, the second half of the retransmission data is data corresponding to the position from the segment data to the last data position of the retransmission data.
In one implementation manner of the present invention, S405 is performed when the length N of the current actual retransmission data is greater than or equal to the length M of the preset retransmission data.
For example, in the time domain resource unit shown in fig. 3, the length of the preset retransmission data is 5 symbols, and the length of the actual retransmission data obtained by the redundancy version determining device 300 is 5 symbols. The length (5 symbols) of the actual retransmission data is equal to the length (5 symbols) of the preset retransmission data, and the determination device 300 of the redundancy version performs S404.
S405, the device 300 for determining a redundancy version determines a redundancy version number of next retransmission data according to the redundancy version number a and the preset cyclic sequence of the redundancy version number.
Optionally, the apparatus 300 for determining a redundancy version may determine the redundancy version number of the next retransmission data according to the cycle sequence of the version number a and the redundancy version number, or may determine the redundancy version number of the next retransmission data according to the version number a and a functional relationship or in another manner. The present invention is described by taking an example that the determination device 300 of the redundancy version determines the redundancy version number of the next retransmission data according to the version number a and the preset cycle sequence of the redundancy version number.
Optionally, the preset cyclic sequence is { version number 0, version number 2, version number 3, version number 1}, and the redundancy version number a is any one of { version number 0, version number 2, version number 3, version number 1 }.
The embodiment of the present invention is described with a preset cyclic sequence { version number 0, version number 2, version number 3, version number 1} (hereinafter, simply referred to as {0,2,3, 1}) of the redundancy version number, but the present invention does not limit the preset cyclic sequence of the redundancy version number in the specific embodiment. For example, any of the following presentation sequences may be employed:
{0,2,3,1}, {0,2,1,3}, {0,1,2,3}, {0,1,3,2}, {0,3,1,2}, {0,3,2,1}, {1,0,3,2}, {1,0,2,3}, {1,2,0,3}, {1,2,3,0}, {1,3,2,0}, {1,3,0,2}, {2,0,3,1}, {2,0, 3}, {2,1,3,0}, {2,3,0,1}, {3, 1}, {3,0, 1}, and {3,0, 1}, 3,0}, 3,0,1}, 3,0, 3,1}, and {3,0, 1}, 3}, 1}, and {2, 3}, 1}, and the like.
Illustratively, the preset cyclic sequence of the redundancy version numbers is {0,2,3,1}, and when the redundancy version number a of the current actual retransmission data is 0, the redundancy version number of the next retransmission data is 2. When the redundancy version number a of the current actual retransmission data is 2, the redundancy version number of the next retransmission data is 3. When the redundancy version number a of the current actual retransmission data is 3, the redundancy version number of the next retransmission data is 1. When the redundancy version number a of the current actual retransmission data is 1, the redundancy version number of the next retransmission data is 0.
Fig. 7 is a schematic time domain resource unit diagram of a conventional method for determining redundancy versions, and referring to fig. 7, it can be seen that data with a length of 20 symbols is retransmitted according to the conventional method for determining redundancy versions, and the redundancy number of each version used in the retransmitted data is not uniform (RV 0 with 10 symbols, RV2 with 5 symbols, RV3 with 3 symbols, and RV1 with 2 symbols). Referring to fig. 5, it can be known that data having a length of 20 symbols is retransmitted according to the method for determining a redundancy version of the present invention. The number of redundancy for each version used in the retransmitted data is uniform (5-symbol RV0, 5-symbol RV2, 5-symbol RV3, 5-symbol RV 1). Therefore, the method for determining the redundancy version of the present invention is compared with the existing method for determining the redundancy version. When the retransmission data is carried out, the use of each version is more uniform, and the repetition among the retransmission data can be reduced, so that the transmission performance is improved.
The scheme provided by the embodiment of the invention is mainly introduced from the perspective of a method. To implement the above functions, it includes hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software, with the exemplary elements and algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The embodiment of the present invention may perform the division of the function modules for the redundancy version determination apparatus 300 according to the above method example, for example, each function module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
It should be noted that the method for determining a redundancy version provided by the embodiment of the present invention may be applicable to various service scenarios. For example, ultra-high reliable low latency communication (urlcc), massive machine type communication (mtc), enhanced mobile broadband (eMBB).
The apparatus 300 for determining a redundancy version according to an embodiment of the present invention is configured to execute the method for determining a redundancy version, and as shown in fig. 8, the apparatus 300 for determining a redundancy version includes: a first acquisition unit 801, a second acquisition unit 802, a first determination unit 803.
The first obtaining unit 801 is configured to obtain the length N of the current actual retransmission data and the redundancy version number a of the current actual retransmission data.
The second obtaining unit 802 is configured to obtain a length M of the predetermined retransmission data.
The first determining unit 803 is configured to determine that the redundancy version number of the next actual retransmission data is a and the length of the next actual retransmission data is M-N, if the length N of the current actual retransmission data is smaller than the length M of the preset retransmission data.
For example, in conjunction with fig. 4, the first acquisition unit 801 may be configured to perform S401. The second obtaining unit 802 may be configured to perform S402. The first determination unit 803 may be used to execute S404.
Optionally, the apparatus 300 for determining redundancy version further includes a second determining unit 804.
The second determining unit 804 is configured to determine a redundancy version number of next retransmission data according to the redundancy version number a and a preset cycle sequence of the redundancy version number if the length N of the current actual retransmission data is equal to the length M of the preset retransmission data.
For example, in connection with fig. 4, the second determining unit 804 may be configured to perform S405.
Optionally, the second determining unit 804 is specifically configured to:
optionally, the preset cyclic sequence is { version number 0, version number 2, version number 3, version number 1}, and the redundancy version number a is any one of { version number 0, version number 2, version number 3, version number 1 }.
Optionally, the first determining unit 803 is further configured to determine that the first data in the next actual retransmission data is located at the same position as the last data of the current actual retransmission data.
Specifically, as shown in fig. 2 and 8. The first acquisition unit 801, the second acquisition unit 802, the first determination unit 803, and the second determination unit 804 in fig. 8 call a program in the memory 303 via the communication line 302 by the processor 301 in fig. 2 to execute the above-described determination method of redundancy version.
An embodiment of the present invention provides a computer-readable storage medium storing one or more programs, where the one or more programs include instructions, which when executed by a redundancy version determination apparatus, cause the redundancy version determination apparatus to perform the steps performed by the redundancy version determination apparatus in the method flow shown in the above method embodiment.
An embodiment of the present invention provides a computer program product including instructions, which, when executed by a redundancy version determination apparatus, causes the redundancy version determination apparatus to perform the steps performed by the redundancy version determination apparatus in the method flow shown in the foregoing method embodiment.
It should be noted that, the above units may be processors separately set up, or may be implemented by integrating in a certain processor of the controller, or may be stored in a memory of the controller in the form of program codes, and the certain processor of the controller calls and executes the functions of the above units. The processor herein may be a CPU, or an ASIC, or one or more integrated circuits configured to implement embodiments of the present invention.
It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided by the present invention, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method for determining redundancy versions, comprising:
acquiring the length N of current actual retransmission data and the redundancy version number A of the current actual retransmission data;
acquiring the length M of preset retransmission data;
and if the length N of the current actual retransmission data is smaller than the length M of the preset retransmission data, determining that the redundancy version number of the next actual retransmission data is A, and the length of the next actual retransmission data is M-N.
2. The determination method according to claim 1, characterized in that the determination method further comprises:
and if the length N of the current actual retransmission data is equal to the length M of the preset retransmission data, determining the redundancy version number of the next retransmission data according to the redundancy version number A and the preset cycle sequence of the redundancy version number.
3. The method according to claim 2, wherein the predetermined cyclic sequence is { version number 0, version number 2, version number 3, version number 1}, and the redundancy version number a is any one of { version number 0, version number 2, version number 3, version number 1 }.
4. The method of claim 1, wherein the determining further comprises:
and determining that the position of the first data in the next actual retransmission data is the same as the position of the last data of the current actual retransmission data.
5. An apparatus for determining redundancy version, comprising:
the first obtaining unit is used for obtaining the length N of the current actual retransmission data and the redundancy version number A of the current actual retransmission data;
a second obtaining unit, configured to obtain a length M of the preset retransmission data;
a first determining unit, configured to determine that a redundancy version number of next actual retransmission data is a and a length of the next actual retransmission data is M-N if the length N of the current actual retransmission data is smaller than the length M of the preset retransmission data.
6. The determination apparatus according to claim 5, characterized in that the determination apparatus further comprises a second determination unit:
the second determining unit is configured to determine a redundancy version number of next retransmission data according to the redundancy version number a and a preset cycle sequence of the redundancy version number if the length N of the current actual retransmission data is equal to the length M of the preset retransmission data.
7. The apparatus according to claim 6, wherein the predetermined cyclic sequence is { version number 0, version number 2, version number 3, version number 1}, and the redundancy version number a is any one of { version number 0, version number 2, version number 3, version number 1 }.
8. The apparatus according to claim 5, wherein the first determining unit is further configured to determine that a first data in the next actual retransmission data is located at the same position as a last data of the current actual retransmission data.
9. An apparatus for determining, comprising: a processor and a memory, the memory for storing a program, the processor calling the program stored by the memory to perform the determination method of any one of claims 1 to 4.
10. A computer readable storage medium storing one or more programs, the one or more programs comprising instructions; the instructions, when executed by a determination device, cause the determination device to perform the determination method of any one of claims 1-4.
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