CN115038173A - Resource mapping method, device and equipment - Google Patents

Resource mapping method, device and equipment Download PDF

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Publication number
CN115038173A
CN115038173A CN202110239706.3A CN202110239706A CN115038173A CN 115038173 A CN115038173 A CN 115038173A CN 202110239706 A CN202110239706 A CN 202110239706A CN 115038173 A CN115038173 A CN 115038173A
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Prior art keywords
transmission resource
bits
mapping
code block
different
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童辉
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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Priority to CN202110239706.3A priority Critical patent/CN115038173A/en
Publication of CN115038173A publication Critical patent/CN115038173A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

The invention provides a method, a device and equipment for mapping resources, wherein the method comprises the following steps: determining the bit number N of transmission resources; the code block is mapped to M bits of a transmission resource, M being less than N. According to the technical scheme, the robustness of the 5G system to frequency selection interference is improved by widening the bandwidth occupied by a single code block.

Description

Resource mapping method, device and equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a device for resource mapping.
Background
In 5G systems, the bandwidth of the narrowband interference is not necessarily much smaller than the bandwidth of the code block (one codec unit), often more than 20%, or even up to 100%, mainly because the narrowband interference is wider (the system bandwidth is increased by 5 times) and the code block bandwidth is smaller (decreasing with the number of streams).
In the prior art, the problem of performance degradation of a code block after frequency selection interference is mainly solved by the following methods:
increasing the size of the code block can meet the requirements on the memory and the operational capability of the terminal and can also increase the power consumption of the terminal; retransmissions are made for the code block. However, under the extremely high rate requirement of 5G, one transport block may contain dozens of code blocks;
retransmission according to code blocks can increase feedback overhead of ACK (retransmission)/NACK (no retransmission) by tens of times, and tens of bits are also needed to indicate whether the DCI is newly transmitted or retransmitted data when indicated by downlink DCI (otherwise, only the whole transmission block can be retransmitted); scheduling depending on subband feedback information is inaccurate.
Disclosure of Invention
The technical problem to be solved by the present invention is how to provide a method, an apparatus and a device for resource mapping, so as to solve the problem of performance degradation of a code block after being subjected to frequency selection interference.
A method of resource mapping, comprising:
determining the bit number N of transmission resources;
the code block is mapped to M bits of a transmission resource, M being less than N.
Optionally, the determining the bit number N of the transmission resource includes:
and determining the bit number N of the transmission resource according to the modulation mode.
Optionally, the modulation method includes one of:
quadrature phase shift keying QPSK;
16 quadrature amplitude modulation QAM;
256 quadrature amplitude modulation QAM;
1024 quadrature amplitude modulation QAM.
Optionally, in the QPSK modulation scheme, the bit number N of the transmission resource is 2;
under the 16QAM modulation mode, the bit number N of the transmission resource is 4;
under the 256QAM modulation mode, the bit number N of the transmission resource is 6;
and under the 1024QAM modulation mode, the bit number N of the transmission resource is 8.
Optionally, the mapping the code block to M bits of the transmission resource includes:
different code blocks are mapped to different bits of the transmission resource, and one code block is mapped to one bit of the transmission resource.
Optionally, mapping different code blocks to different bits of the transmission resource in the QPSK modulation scheme includes:
a first code block is mapped to a first bit and a second code block is mapped to a second bit of the transmission resource.
Optionally, mapping different code blocks to different bits of the transmission resource in a 16QAM modulation scheme includes:
mapping the third code block to a first bit of the first transmission resource;
mapping a fourth code block onto second bits of the first transmission resource;
mapping a fifth code block onto a third bit of the first transmission resource
The sixth code block is mapped to a fourth bit of the first transmission resource.
Optionally, when the bit number of the transmission resource is greater than 2, mapping different code blocks to different bits of the transmission resource, including: the same code block is mapped to different bits of different transmission resources.
The embodiment of the present invention further provides a device for resource mapping, including:
a determining module, configured to determine a bit number N of a transmission resource;
a mapping module, configured to map a code block to M bits of a transmission resource, where M is smaller than N.
An embodiment of the present invention further provides a communication device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above.
Embodiments of the present invention also provide a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the method as described above.
The scheme of the invention at least comprises the following beneficial effects:
determining the bit number N of transmission resources; the code blocks are mapped to M bits of transmission resources, wherein M is smaller than N, so that the bandwidth occupied by a single code block can be widened, and the robustness of the 5G system to frequency selective interference is improved.
Drawings
FIG. 1 is a flow chart illustrating a resource mapping method according to an embodiment of the present invention;
fig. 2 is a constellation diagram when a transmission resource carries 2 bits according to an embodiment of the present invention;
fig. 3 is a constellation diagram when a transmission resource carries 4 bits according to an embodiment of the present invention;
fig. 4 is a constellation diagram for mapping the same code block to different bits of different transmission resources according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for resource mapping according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides a method for resource mapping, including:
step 11: determining the bit number N of transmission resources; wherein, the transmission resource is an re (resource element);
step 12: and mapping the code block to M bits of the transmission resource, wherein M is less than N.
According to the embodiment of the invention, the code blocks are mapped to M bits of transmission resources by determining the bit number N of the transmission resources, wherein M is less than N, so that the bandwidth occupied by a single code block is widened, and the robustness of a 5G system to frequency selective interference is improved.
In an optional embodiment of the present invention, in step 11, the determining the bit number N of the transmission resource includes: and determining the bit number N of the transmission resource according to the modulation mode.
Here, the modulation scheme includes one of:
quadrature phase shift keying, QPSK, is equivalent to 4 quadrature amplitude modulation, QAM;
16 quadrature amplitude modulation QAM;
256 quadrature amplitude modulation QAM;
1024 quadrature amplitude modulation QAM.
Wherein, under the QPSK modulation mode, the bit number N of the transmission resource is 2;
under the 16QAM modulation mode, the bit number N of the transmission resource is 4;
under the 256QAM modulation mode, the bit number N of the transmission resource is 6;
and under the 1024QAM modulation mode, the bit number N of the transmission resource is 8.
In an optional embodiment of the present invention, in step 12, the mapping the code block to M bits of the transmission resource includes:
different code blocks are mapped to different bits of the transmission resource, and one code block is mapped to one bit of the transmission resource.
In an optional embodiment of the present invention, in step 12, mapping different code blocks to different bits of the transmission resource in a QPSK modulation scheme includes:
a first code block is mapped to a first bit and a second code block is mapped to a second bit of the transmission resource.
Taking QPSK modulation as an example, two bits, b0 and b1, are carried on one RE, as shown in fig. 2, when the imaginary part of the received signal (including the real part and the imaginary part) is in the left half region, b0 is equal to 0, otherwise, b0 is equal to 1; similarly, when the imaginary part of the received signal is in the upper half area, b1 is equal to 1, otherwise, b1 is equal to 0.
In this embodiment of the present invention, code block X is mapped onto bit b0, and only one bit is used on this RE, so the code block bandwidth would be twice as wide as mapping the code block onto all bits of the RE.
To improve spectral efficiency, another code block, e.g., code block Y, is mapped onto another bit of the RE, thereby achieving full utilization of the entire RE.
As shown in fig. 3, in step 12, in an alternative embodiment of the present invention, mapping different code blocks to different bits of the transmission resource in a 16QAM modulation scheme includes:
mapping the third code block to a first bit of the first transmission resource;
mapping a fourth code block onto second bits of the first transmission resource;
mapping a fifth code block onto a third bit of the first transmission resource
The sixth code block is mapped to a fourth bit of the first transmission resource.
A 16QAM modulation example, four bits, b0 (first bit), b1 (second bit), b2 (third bit), b3 (fourth bit), are carried on one RE; the code block X, Y, Z, W may be mapped onto b0, b1, b2, b3, respectively, which is four times as wide as the existing scheme.
It is also possible to map code block X onto b0, b1, and code block Y onto b2, b 3. Code block Z, W maps onto other REs. Compared with the existing scheme, the code block bandwidth is doubled. Similarly, code block X may also be mapped onto b0, b2, while code block Y is mapped onto b1, b3, and so on.
In addition, a plurality of bits can be mapped to one wireless or wired resource through the method, and the method can be popularized to all modulation methods such as 64QAM, 256QAM and 1024 QAM.
In an optional embodiment of the present invention, in step 12, when the bit number of the transmission resource is greater than 2, mapping different code blocks to different bits of the transmission resource includes: the same code block is mapped to different bits of different transmission resources.
Specifically, the bit error rates of different bits in a given modulation method are different. For example, the 4 bits of 16QAM are actually different in error rate: the bit error rate of b0 and b1 is higher than that of b2 and b3 because the probability of error detection of the middle four constellation points is higher, and the middle four constellation points are only used for detecting b0 and b1, but not for detecting b2 and b 3.
This embodiment of the present invention, as shown in fig. 4, may map code block X to b0, b1 (code block Y to b2, b3) on some REs and to b2, b3 (code block Y to b0, b1) on another RE in order to equalize the performance of multiple code blocks.
The same may be true for other modulation schemes 64QAM, 256QAM, etc.
Furthermore, the method may also use different resource granularity to transpose the code block to bit mapping, such as using different mappings on different rbs (resource blocks) instead of REs.
In the above technical solution of the embodiment of the present invention, it is generally assumed that two code blocks are equal in length. This is basically achieved in the present 5G system because the code word generation of 5G is to fill the code blocks with information bits one by one.
For example, if 380000 information bits need to be encoded at one time, then the 5G system will be generated first
Figure BDA0002961707900000051
If there are several code blocks, each having a length of 8424 information bits and there are 920 information bits left, the remaining bits are grouped into a smaller code block for individual transmission. Therefore, most code blocks are of equal length (equal to the maximum length of the code block). However, the last code block is often very easy to cause retransmission due to small bandwidth, and therefore, the base station preferably does not form a very small code block during scheduling.
According to the embodiment of the invention, code blocks are mapped to part of bits of transmission resources, a plurality of code blocks are mapped to all bits of a single transmission resource, and different code block-to-bit mapping methods are adopted on different transmission resources, so that the bandwidth occupied by a single code block can be widened, and the robustness of a 5G system on frequency selection interference is improved.
An embodiment of the present invention further provides an apparatus 50 for resource mapping, including:
a determining module 51, configured to determine a bit number N of a transmission resource;
a mapping module 52, configured to map the code block to M bits of the transmission resource, where M is smaller than N.
Optionally, the determining the bit number N of the transmission resource includes:
and determining the bit number N of the transmission resource according to the modulation mode.
Optionally, the modulation method includes one of: quadrature phase shift keying QPSK; 16 quadrature amplitude modulation QAM; 256 quadrature amplitude modulation QAM; 1024 quadrature amplitude modulation QAM.
Optionally, in the QPSK modulation scheme, the bit number N of the transmission resource is 2;
under the 16QAM modulation mode, the bit number N of the transmission resource is 4;
under the 256QAM modulation mode, the bit number N of the transmission resource is 6;
and under the 1024QAM modulation mode, the bit number N of the transmission resource is 8.
Optionally, the mapping the code block to M bits of the transmission resource includes:
different code blocks are mapped to different bits of the transmission resource, one code block being mapped to one bit of the transmission resource.
Optionally, mapping different code blocks to different bits of the transmission resource in the QPSK modulation scheme includes:
a first code block is mapped to first bits and a second code block is mapped to second bits of the transmission resources.
Optionally, mapping different code blocks to different bits of the transmission resource in a 16QAM modulation scheme includes:
mapping the third code block to a first bit of the first transmission resource;
mapping a fourth code block onto second bits of the first transmission resource;
mapping a fifth code block onto a third bit of the first transmission resource
The sixth code block is mapped to a fourth bit of the first transmission resource.
Optionally, when the bit number of the transmission resource is greater than 2, mapping different code blocks to different bits of the transmission resource, including: the same code block is mapped to different bits of different transmission resources.
It should be noted that the apparatus is an apparatus corresponding to the above method, and all the implementations in the above method embodiment are applicable to the embodiment of the apparatus, and the same technical effects can be achieved.
According to the technical scheme, the bit number N of the transmission resource is determined; the code blocks are mapped to M bits of transmission resources, wherein M is smaller than N, so that the bandwidth occupied by a single code block can be widened, and the robustness of the 5G system to frequency selective interference is improved.
An embodiment of the present invention further provides a communication device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above. All the implementation manners in the above method embodiment are applicable to this embodiment, and the same technical effect can be achieved.
Embodiments of the present invention also provide a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the method as described above. All the implementation manners in the method embodiment are applicable to the embodiment, and the same technical effect can be achieved.
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 in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, 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.
The 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 functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
Furthermore, it should be noted that in the apparatus and method of the present invention, it is obvious that each component or each step may be decomposed and/or recombined. These decompositions and/or recombinations are to be considered as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.
The object of the invention is thus also achieved by a program or a set of programs running on any computing device. The computing device may be a well-known general purpose device. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that such storage media can be any known storage media or any storage media developed in the future. It is also noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be considered as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (11)

1. A method of resource mapping, comprising:
determining the bit number N of transmission resources;
and mapping the code block to M bits of the transmission resource, wherein M is less than N.
2. The method according to claim 1, wherein the determining the number N of bits of the transmission resource comprises:
and determining the bit number N of the transmission resource according to the modulation mode.
3. The method of claim 1, wherein the modulation scheme comprises one of:
quadrature phase shift keying QPSK;
16 quadrature amplitude modulation QAM;
256 quadrature amplitude modulation QAM;
1024 quadrature amplitude modulation QAM.
4. The method of resource mapping according to claim 3,
under the QPSK modulation mode, the bit number N of the transmission resource is 2;
under the 16QAM modulation mode, the bit number N of the transmission resource is 4;
under the 256QAM modulation mode, the bit number N of the transmission resource is 6;
and under the 1024QAM modulation mode, the bit number N of the transmission resource is 8.
5. The method of resource mapping according to claim 1, wherein the mapping code blocks onto M bits of transmission resources comprises:
different code blocks are mapped to different bits of the transmission resource, and one code block is mapped to one bit of the transmission resource.
6. The method of claim 5, wherein mapping different code blocks to different bits of the transmission resource in a QPSK modulation scheme comprises:
a first code block is mapped to first bits and a second code block is mapped to second bits of the transmission resources.
7. The method of claim 5, wherein mapping different code blocks to different bits of the transmission resources in a 16QAM modulation scheme comprises:
mapping the third code block to a first bit of the first transmission resource;
mapping a fourth code block onto second bits of the first transmission resource;
mapping a fifth code block onto a third bit of the first transmission resource
The sixth code block is mapped to a fourth bit of the first transmission resource.
8. The method of claim 5, wherein when the number of bits of the transmission resource is greater than 2, mapping different code blocks onto different bits of the transmission resource comprises:
the same code block is mapped to different bits of different transmission resources.
9. An apparatus for resource mapping, comprising:
a determining module, configured to determine a bit number N of a transmission resource;
a mapping module, configured to map a code block to M bits of a transmission resource, where M is smaller than N.
10. A communication device, comprising: processor, memory storing a computer program which, when executed by the processor, performs the method of any of claims 1 to 8.
11. A computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 8.
CN202110239706.3A 2021-03-04 2021-03-04 Resource mapping method, device and equipment Pending CN115038173A (en)

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