CN112532343A - Method and device for rate matching and resource mapping of downlink shared channel in synchronous frame - Google Patents

Method and device for rate matching and resource mapping of downlink shared channel in synchronous frame Download PDF

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Publication number
CN112532343A
CN112532343A CN201910887103.7A CN201910887103A CN112532343A CN 112532343 A CN112532343 A CN 112532343A CN 201910887103 A CN201910887103 A CN 201910887103A CN 112532343 A CN112532343 A CN 112532343A
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frame
rate matching
synchronous
resource mapping
current frame
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李迪
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Potevio Information Technology Co Ltd
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Potevio Information Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0067—Rate matching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0067—Rate matching
    • H04L1/0068—Rate matching by puncturing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention provides a method and a device for rate matching and resource mapping when a downlink shared channel meets a synchronous frame, wherein the method comprises the following steps: carrying out rate matching calculation on the PDSCH according to N frame data; judging whether the current frame is a synchronous frame, if so, covering PDSCH data corresponding to the current frame by using data corresponding to the synchronous frame, and mapping the data corresponding to the synchronous frame; and judging whether the current frame is the last frame in the transmission period, if so, ending the process. The rate matching in the embodiment of the invention is calculated according to the preset transmission frame number in a transmission period, when a synchronous frame is encountered, the PDSCH data of the current frame is covered by the synchronous frame, and the PDSCH data of other frames are subjected to resource mapping according to a normal sequence, so that the merging time can be advanced to a symbol level when the terminal performs repeated merging, and the processing capacity of the terminal is increased.

Description

Method and device for rate matching and resource mapping of downlink shared channel in synchronous frame
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for rate matching and resource mapping when a downlink shared channel encounters a synchronization frame.
Background
At present, the sending time of the synchronous frame in the LTE-G230 MHz system is the wireless frame sending synchronous frame with the frame number modulo 40 being 0. In one transmission period, when a synchronization frame is encountered in N frames transmitted by a physical Downlink Shared channel pdsch (physical Downlink Shared channel), regardless of which frame of the N frames the synchronization frame is encountered, the last frame data in the current transmission period is knocked down by default, and other data are re-matched into the remaining N-1 frames except the synchronization frame, and then resource mapping is performed.
In the existing method for rate matching and resource mapping when an LTE-G230 MHz system encounters a synchronous frame, when a terminal needs to merge received data in a multi-frame repeated scene, the terminal can only process the data at a bit level, and the processing capability of the terminal cannot be fully utilized. For example, assume that within a transmission period, 4 frames are transmitted in the form of: 0123, if the second frame meets the synchronization frame, the last frame in the current transmission period is knocked out by default, the data of other frames is re-matched, resource mapping is performed on the 3 newly matched frames and the synchronization frame, that is, resource mapping is performed according to the sequence of frame 0, the synchronization frame, frame 1 and frame 2, and the terminal receives 0X 12. In a multi-frame repeat transmission scenario, if the terminal performs repeat transmission and the terminal performs combination on received data at the moment, the data can only be combined at a bit level and cannot be directly combined in sequence, so that the processing capability of the terminal is not fully utilized.
Disclosure of Invention
Embodiments of the present invention provide a method for rate matching and resource mapping when a downlink shared channel encounters a synchronization frame, which overcomes or at least partially solves the above problems.
In a first aspect, an embodiment of the present invention provides a method for rate matching and resource mapping when a downlink shared channel encounters a synchronization frame, including:
carrying out rate matching calculation on the PDSCH according to N frame data;
judging whether a current frame is a synchronous frame, if so, covering PDSCH data corresponding to the current frame with data corresponding to the synchronous frame, and mapping the data corresponding to the synchronous frame; judging whether the current frame is the last frame in the transmission period, if so, ending the process;
wherein, N is a preset transmission frame number in a transmission period.
Further, after the step of determining whether the current frame is a synchronization frame, the method further includes:
and if the current frame is not the synchronous frame, mapping the PDSCH data corresponding to the current frame.
Further, the step of performing rate matching calculation on the PDSCH according to N frame data specifically includes:
and determining the bit number required by the transmission of the N frames of data through a puncturing or repeating process.
Further, the step of determining whether the current frame is a synchronization frame specifically includes:
and judging whether the modulus of the frame number of the current frame to the frame number 40 is zero, and if the modulus is zero, acquiring that the current frame is a synchronous frame.
In a second aspect, an embodiment of the present invention provides a device for rate matching and resource mapping when a downlink shared channel encounters a synchronization frame, including:
the rate matching module is used for carrying out rate matching calculation on the PDSCH according to the N frame data;
the resource mapping module is used for judging whether a current frame is a synchronous frame or not, covering PDSCH data corresponding to the current frame by using the data corresponding to the synchronous frame if the current frame is the synchronous frame, and mapping the data corresponding to the synchronous frame; judging whether the current frame is the last frame in the transmission period, if so, ending the process;
wherein, N is a preset transmission frame number in a transmission period.
Further, the resource mapping module is further configured to:
and if the current frame is not the synchronous frame, mapping the PDSCH data corresponding to the current frame.
Further, the rate matching module is specifically configured to:
and determining the bit number required by the N frames of data through a puncturing or repeating process.
Further, the resource mapping module is specifically configured to:
and judging whether the modulus of the frame number of the current frame to the frame number 40 is zero, and if the modulus is zero, acquiring that the current frame is a synchronous frame.
According to the method and the device for rate matching and resource mapping when the downlink shared channel encounters the synchronous frame, the PDSCH rate matching is calculated according to N frames, when the synchronous frame encounters, PDSCH data of the current frame are covered by the synchronous frame data, and resource mapping is performed on PDSCH data of other frames according to a normal sequence, so that when the terminal performs repeated combination, the combination time can be advanced to a symbol level for processing, the pressure of bit level processing is reduced, the processing time is more reasonable, and the processing capacity of the terminal is increased.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic flowchart of a method for rate matching and resource mapping when a downlink shared channel encounters a synchronization frame according to an embodiment of the present invention;
fig. 2 is a schematic view of a complete flow of a method for rate matching and resource mapping when a downlink shared channel encounters a synchronization frame according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a device for rate matching and resource mapping when a downlink shared channel encounters a synchronization frame according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
As shown in fig. 1, a schematic flow chart of a method for rate matching and resource mapping when a downlink shared channel encounters a synchronization frame according to an embodiment of the present invention includes:
step 100, performing rate matching calculation on a physical downlink shared channel PDSCH according to N frame data;
specifically, the physical Downlink Shared channel pdsch (physical Downlink Shared channel) is one of LTE-G physical Downlink channels, and is a Downlink channel for the LTE-G system to carry main user data. Its main function is to complete baseband signal processing, which is completed by two parts of downlink transmitting end and receiving end.
The processing flow of the downlink transmitting terminal comprises the following steps: 1) adding CRC; 2) channel coding; 3) rate matching; 4) scrambling and modulating; 5) layer mapping and precoding; 6) mapping resources; 7) and modulating OFDM and adding a cyclic prefix to generate a time domain OFDM signal of each antenna port.
And the single sub-band terminal performs downlink synchronization based on the synchronization frame. In the existing LTE-G system, when N frames transmitted by the PDSCH of the physical downlink shared channel encounter a synchronization frame, no matter which frame of the N frames encounters the synchronization frame, the last frame data in the current transmission period is default to be discarded, other data are re-matched to the remaining N-1 frames except the synchronization frame, and then resource mapping is performed on the re-matched N-1 frame data and the synchronization frame, which may cause that the terminal may only process at the bit level in a multi-frame repeated merging scenario, and the processing capability of the terminal may not be fully utilized. In order to solve the problem, different from the prior art, in the embodiment of the present invention, no matter which frame of N frames is encountered in the synchronization frame, the last frame of data is not dropped and the other data is re-matched, but the rate matching is performed on the PDSCH according to the N frames of data normally, that is, the PDSCH transmitting end performs the rate matching calculation on the PDSCH according to the N frames of data.
The method comprises the steps that N is a preset transmission frame number in a transmission period, the number of physical resource blocks is determined by the size of N, and the bit number required by the transmission of the N frame data is determined through the rate matching through a punching or repeating process.
The transmission period of each channel designed by the LTE-G system is 2nEach frame is a transmission unit, and therefore, in the embodiment of the present invention, the value of the preset transmission frame number N is a power of 2, that is, N is 2nN is a natural number of 1 or moreAnd (4) counting.
Step 101, judging whether a current frame is a synchronous frame, if the current frame is the synchronous frame, covering PDSCH data corresponding to the current frame by using data corresponding to the synchronous frame, and mapping the data corresponding to the synchronous frame; and judging whether the current frame is the last frame in the transmission period, if so, ending the process.
Specifically, when resource mapping is performed, it is first determined whether a current frame is a synchronization frame, and if the current frame is the synchronization frame, data corresponding to the synchronization frame is used to cover PDSCH data corresponding to the current frame, and the data corresponding to the synchronization frame is mapped. For example, for N frames transmitted in one transmission period, if the current frame is the second frame, if the second frame is the synchronization frame, the PDSCH data corresponding to the second frame is covered with the data corresponding to the synchronization frame, and the resource mapping is performed on the data corresponding to the synchronization frame.
And then, judging whether the current frame is the last frame in the transmission period, if so, ending the process. Otherwise, step 101 is repeated. Following the above example, if it is obvious that the second frame data is not the last frame data, the resource mapping step 101 is continuously performed on the third frame until the resource mapping is performed on the last frame in the transmission period, and then the whole process is ended.
After the step of judging whether the current frame is a synchronous frame, the method further comprises the following steps:
and if the current frame is not the synchronous frame, mapping the PDSCH data corresponding to the current frame.
It can be understood that if the current frame is not the synchronization frame, normal resource mapping is performed on the PDSCH data of the current frame.
When the terminal merges the received data in a multi-frame repetition scenario, for example, frame 0123 is transmitted repeatedly, wherein four frames are encountered during one transmission, then the terminal may merge frame 0, frame 2, and frame 3 of one transmission (0X23, X indicates that the frame is a synchronization frame) with frame 0, frame 2, and frame 3 of another transmission (0123) in sequence, so as to advance the merging time to the symbol level for processing.
It should be noted that, the embodiment of the present invention improves the rate matching and resource mapping process of the PDSCH transmitting end of the physical downlink shared channel, and other processing processes of the transmitting end may refer to the prior art.
In the method for rate matching and resource mapping when a downlink shared channel encounters a synchronization frame provided by the embodiment of the invention, the PDSCH rate matching is calculated according to N frames, when the synchronization frame encounters a synchronization frame, PDSCH data of a current frame is covered by the synchronization frame, and PDSCH data of other frames are subjected to resource mapping according to a normal sequence, so that a terminal can advance a merging time to a symbol level for processing when repeated merging is performed, the pressure of bit level processing is reduced, the processing time is more reasonable, and the processing capability of the terminal is increased.
In an embodiment, the step of performing rate matching calculation on the PDSCH according to N frame data specifically includes:
and determining the bit number required by the transmission of the N frames of data through a puncturing or repeating process.
Specifically, the specific process of calculating the PDSCH rate matching according to the N frames is to determine the bit number required by the transmission of the N frames of data through a punching or repeating process.
Based on the content of the foregoing embodiment, the step of determining whether the current frame is a synchronization frame specifically includes:
and judging whether the modulus of the frame number of the current frame to the frame number 40 is zero, and if the modulus is zero, acquiring that the current frame is a synchronous frame.
Specifically, if the frame number of the current frame modulo 40 is zero, the current frame is a synchronization frame.
As shown in fig. 2, a complete flow diagram of a method for rate matching and resource mapping when a downlink shared channel encounters a synchronization frame according to an embodiment of the present invention includes:
step 201, performing rate matching calculation on a physical downlink shared channel PDSCH according to N frame data;
step 202, judging whether the current frame is a synchronous frame, if so, executing step 203; otherwise, go to step 204;
step 203, covering the PDSCH data corresponding to the current frame with the data corresponding to the synchronization frame, and mapping the data corresponding to the synchronization frame;
step 204, performing resource mapping on the PDSCH data corresponding to the current frame;
step 205, determining whether the current frame is the last frame in the transmission period, if so, ending the process, otherwise, skipping to step 202.
As shown in fig. 3, a schematic structural diagram of a device for rate matching and resource mapping when encountering a synchronization frame for a downlink shared channel according to an embodiment of the present invention is applied to a PDSCH downlink transmitting end, and includes: a rate matching module 301 and a resource mapping module 302, wherein,
a rate matching module 301, configured to perform rate matching calculation on the PDSCH according to N frame data;
specifically, in the existing LTE-G system, when N frames are encountered during transmission of a pdsch (physical Downlink Shared channel) of a physical Downlink Shared channel (pdcch), whichever of the N frames is encountered, the last frame of data is dropped by default, other data is re-matched to the remaining N-1 frames except for the synchronization frame, and then resource mapping is performed on the re-matched N-1 frame of data and the synchronization frame. In order to solve the problem, different from the prior art, in the embodiment of the present invention, no matter which frame of the N frames is encountered as the synchronization frame, the rate matching module 301 does not drop the last frame of data, but normally performs rate matching according to the N frames of data, so that the transmitting end of the PDSCH performs rate matching calculation on the PDSCH according to the N frames of data.
Wherein N is a preset transmission frame number in a transmission period, and the size of N determines the number of physical resource blocks, that is, the rate matching module 301 determines the number of bits required for transmitting the N frame data through a punching or repeating process.
Transmission period of each channel designed by LTE-G systemPeriod 2nEach frame is a transmission unit, and therefore, the preset transmission frame number N is a power of 2, i.e., N is 2nAnd n is a natural number of 1 or more.
A resource mapping module 302, configured to determine whether a current frame is a synchronization frame, and if the current frame is the synchronization frame, cover PDSCH data corresponding to the current frame with data corresponding to the synchronization frame and map the data corresponding to the synchronization frame; and judging whether the current frame is the last frame in the transmission period, if so, ending the process.
Specifically, when performing resource mapping, the resource mapping module 302 first determines whether a current frame is a synchronization frame, and if the current frame is the synchronization frame, covers PDSCH data corresponding to the current frame with data corresponding to the synchronization frame and maps the data corresponding to the synchronization frame. For example, for N frames transmitted in one transmission period, if the current frame is the second frame, and if the second frame is the synchronization frame, the resource mapping module 302 covers the PDSCH data corresponding to the second frame with the data corresponding to the synchronization frame, and maps the data corresponding to the synchronization frame.
Then, the resource mapping module 302 determines whether the current frame is the last frame in the transmission period, and if so, ends the process; otherwise, continuing to execute the resource mapping step. Following the above example, if it is obvious that the second frame data is not the last frame data, resource mapping is performed on the third frame, until resource mapping is performed on the last frame in the transmission period, and then the whole process is ended.
Further, the resource mapping module 302 is further configured to:
and if the current frame is not the synchronous frame, performing resource mapping on the data corresponding to the current frame.
It can be understood that, if the current frame is not the synchronization frame, the resource mapping module 302 performs normal resource mapping on the PDSCH data of the current frame.
In the device for rate matching and resource mapping when a downlink shared channel encounters a synchronization frame, the PDSCH rate matching is calculated according to N frames, when the synchronization frame is encountered, the PDSCH data of the current frame is covered by the synchronization frame, and the PDSCH data of other frames are resource mapped according to the normal sequence, so that the terminal can advance the merging time to the symbol level for processing when repeatedly merging, the pressure of bit level processing is reduced, the processing time is more reasonable, and the processing capability of the terminal is increased.
Further, the rate matching module 301 is specifically configured to:
and determining the bit number required by the transmission of the N frames of data through a puncturing or repeating process.
Specifically, the specific process of calculating the PDSCH rate matching according to the N frames is to determine the bit number required by the transmission of the N frames of data through a punching or repeating process.
Based on the content of the foregoing embodiment, the resource mapping module is specifically configured to:
and judging whether the modulus of the frame number of the current frame to the frame number 40 is zero, and if the modulus is zero, acquiring that the current frame is a synchronous frame.
Specifically, if the frame number of the current frame modulo 40 is zero, the current frame is a synchronization frame.
The above-described embodiments of the apparatus are merely illustrative, and 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 modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (8)

1. A method for rate matching and resource mapping when a downlink shared channel encounters a synchronization frame is characterized by comprising the following steps:
carrying out rate matching calculation on the PDSCH according to N frame data;
judging whether a current frame is a synchronous frame, if so, covering PDSCH data corresponding to the current frame with data corresponding to the synchronous frame, and mapping the data corresponding to the synchronous frame; judging whether the current frame is the last frame in the transmission period, if so, ending the process;
wherein, N is a preset transmission frame number in a transmission period.
2. The method for rate matching and resource mapping when encountering a synchronization frame for a downlink shared channel according to claim 1, wherein after the step of determining whether the current frame is a synchronization frame, the method further comprises:
and if the current frame is not the synchronous frame, mapping the PDSCH data corresponding to the current frame.
3. The method for rate matching and resource mapping when encountering a synchronization frame for the downlink shared channel according to claim 1, wherein the step of performing rate matching calculation on the PDSCH according to N frame data specifically comprises:
and determining the bit number required by the transmission of the N frames of data through a puncturing or repeating process.
4. The method for rate matching and resource mapping when encountering a synchronization frame for a downlink shared channel according to claim 1, wherein the step of determining whether the current frame is a synchronization frame specifically comprises:
and judging whether the modulus of the frame number of the current frame to the frame number 40 is zero, and if the modulus is zero, acquiring that the current frame is a synchronous frame.
5. A device for rate matching and resource mapping when a downlink shared channel encounters a synchronization frame is characterized by comprising:
the rate matching module is used for carrying out rate matching calculation on the PDSCH according to the N frame data;
the resource mapping module is used for judging whether a current frame is a synchronous frame or not, covering PDSCH data corresponding to the current frame by using the data corresponding to the synchronous frame if the current frame is the synchronous frame, and mapping the data corresponding to the synchronous frame; judging whether the current frame is the last frame in the transmission period, if so, ending the process;
wherein, N is a preset transmission frame number in a transmission period.
6. The apparatus as claimed in claim 5, wherein the resource mapping module is further configured to:
and if the current frame is not the synchronous frame, mapping the PDSCH data corresponding to the current frame.
7. The apparatus for rate matching and resource mapping in synchronous frames for a downlink shared channel according to claim 5, wherein the rate matching module is specifically configured to:
and determining the bit number required by the transmission of the N frames of data through a puncturing or repeating process.
8. The apparatus for rate matching and resource mapping in a synchronous frame for a downlink shared channel according to claim 5, wherein the resource mapping module is specifically configured to:
and judging whether the modulus of the frame number of the current frame to the frame number 40 is zero, and if the modulus is zero, acquiring that the current frame is a synchronous frame.
CN201910887103.7A 2019-09-19 2019-09-19 Method and device for rate matching and resource mapping of downlink shared channel in synchronous frame Pending CN112532343A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103428143A (en) * 2012-05-22 2013-12-04 普天信息技术研究院有限公司 Method for sending synchronization signals
US20150327202A1 (en) * 2014-05-08 2015-11-12 Sony Corporation Method and device in wireless communication system
CN110662282A (en) * 2018-06-28 2020-01-07 普天信息技术有限公司 Method and device for controlling whether terminal uses synchronous frame in electric power wireless private network

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103428143A (en) * 2012-05-22 2013-12-04 普天信息技术研究院有限公司 Method for sending synchronization signals
US20150327202A1 (en) * 2014-05-08 2015-11-12 Sony Corporation Method and device in wireless communication system
CN110662282A (en) * 2018-06-28 2020-01-07 普天信息技术有限公司 Method and device for controlling whether terminal uses synchronous frame in electric power wireless private network

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