CN111200488A - Method and device for pilot configuration of downlink channel based on D2D radio frame structure - Google Patents
Method and device for pilot configuration of downlink channel based on D2D radio frame structure Download PDFInfo
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- CN111200488A CN111200488A CN201811385052.XA CN201811385052A CN111200488A CN 111200488 A CN111200488 A CN 111200488A CN 201811385052 A CN201811385052 A CN 201811385052A CN 111200488 A CN111200488 A CN 111200488A
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- 238000004891 communication Methods 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- 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
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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Abstract
The embodiment of the invention provides a pilot configuration method and a pilot configuration device for a downlink channel based on a radio frame structure of D2D, wherein the radio frame structure comprises a subframe1 and a subframe2, and the method comprises the following steps: configuring all symbols from the first symbol after the time slot GP of the subframe1 to the time slot GP of the subframe2 as downlink channels; and configuring a pilot frequency of the downlink channel on the same frequency domain corresponding to the third symbol and the eighth symbol after the first symbol at intervals of one subcarrier. The device performs the above method. According to the method and the device for configuring the pilot frequency of the downlink channel based on the radio frame structure of the D2D, the pilot frequency of the downlink channel is configured on the same frequency domain corresponding to the third symbol and the eighth symbol after the time slot GP of the subframe1, and at an interval of one subcarrier, so that the pilot frequency of the downlink channel can be configured reasonably and effectively.
Description
Technical Field
The embodiment of the invention relates to the technical field of channel processing, in particular to a pilot frequency configuration method and device of a downlink channel based on a wireless frame structure of D2D.
Background
D2D Communication technology (Device to Device Communication) performs data transmission between UEs, that is, a UE in signal coverage is selected as a relay UE, and data transmission is performed between the relay UE and a UE outside the signal coverage, so that the UE outside the signal coverage accesses a network through the relay UE, a channel sent by the relay UE to the UE outside the signal coverage is called a downlink channel, and the downlink channel needs to be configured with a pilot.
Fig. 1 is a schematic diagram of pilot configuration of a downlink channel in the prior art, as shown in fig. 1, the downlink channel includes 13 symbols (i.e. 13 columns of squares in fig. 1), each symbol includes 11 subcarriers (i.e. 11 rows of squares in fig. 1), and the pilots correspond to the squares in dark color in fig. 1, so that 2 pairs of pilots in all the pilots occupy the same frequency domain position (i.e. one row has two pilots) and can be used for frequency offset estimation, and the downlink channel based on the radio frame structure of D2D occupies sub-frame 1 and sub-frame 2, specifically occupies the fifth symbol to the eighth symbol (counted from zero) of sub-frame 1, and the first eight symbols of sub-frame 2, so that the total number of occupied symbols is 12, and therefore, if the pilot configuration method in the prior art is adopted, there is only 1 pair of pilots in the same subcarrier position, and the estimation performance may be greatly reduced in.
Therefore, how to avoid the above-mentioned drawbacks is a problem to be solved urgently, which is to reasonably and effectively configure the pilots in the downlink channel based on the radio frame structure of D2D.
Disclosure of Invention
To solve the problems in the prior art, embodiments of the present invention provide a pilot configuration method and apparatus for a downlink channel based on a radio frame structure of D2D.
In a first aspect, an embodiment of the present invention provides a pilot configuration method for a downlink channel based on a radio frame structure of D2D, where the radio frame structure includes a subframe1 and a subframe2, and the method includes:
configuring all symbols from the first symbol after the time slot GP of the subframe1 to the time slot GP of the subframe2 as downlink channels;
and configuring a pilot frequency of the downlink channel on the same frequency domain corresponding to the third symbol and the eighth symbol after the first symbol at intervals of one subcarrier.
In a second aspect, an embodiment of the present invention provides an apparatus for configuring a pilot of a downlink channel based on a radio frame structure of D2D, where the radio frame structure includes a subframe1 and a subframe2, and the apparatus includes:
a first configuration unit, configured to configure all symbols between a first symbol after the slot GP of the subframe1 and the slot GP of the subframe2 as a downlink channel;
and a second configuration unit, configured to configure a pilot of the downlink channel on the same frequency domain corresponding to a third symbol and an eighth symbol after the first symbol, and every other subcarrier.
In a third aspect, an embodiment of the present invention provides an electronic device, including: a processor, a memory, and a bus, wherein,
the processor and the memory are communicated with each other through the bus;
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform a method comprising:
configuring all symbols from the first symbol after the time slot GP of the subframe1 to the time slot GP of the subframe2 as downlink channels;
and configuring a pilot frequency of the downlink channel on the same frequency domain corresponding to the third symbol and the eighth symbol after the first symbol at intervals of one subcarrier.
In a fourth aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium, including:
the non-transitory computer readable storage medium stores computer instructions that cause the computer to perform a method comprising:
configuring all symbols from the first symbol after the time slot GP of the subframe1 to the time slot GP of the subframe2 as downlink channels;
and configuring a pilot frequency of the downlink channel on the same frequency domain corresponding to the third symbol and the eighth symbol after the first symbol at intervals of one subcarrier.
According to the method and the device for configuring the pilot frequency of the downlink channel based on the radio frame structure of the D2D, the pilot frequency of the downlink channel is configured on the same frequency domain corresponding to the third symbol and the eighth symbol after the time slot GP of the subframe1, and at an interval of one subcarrier, so that the pilot frequency of the downlink channel can be configured reasonably and effectively.
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 diagram of pilot configuration of a downlink channel in the prior art;
fig. 2 is a schematic flowchart of a pilot configuration method for a downlink channel based on a radio frame structure of D2D according to an embodiment of the present invention;
fig. 3 is a schematic diagram of pilot configuration of a downlink channel based on a radio frame structure of D2D according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a pilot configuration apparatus of a downlink channel based on a radio frame structure of D2D according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device 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.
Fig. 2 is a schematic flow chart of a pilot configuration method for a downlink channel based on a radio frame structure of D2D according to an embodiment of the present invention, and as shown in fig. 2, the present invention provides a pilot configuration method for a downlink channel based on a radio frame structure of D2D, where the radio frame structure includes a subframe1 and a subframe2, and the method includes the following steps:
s201: and configuring all symbols from the first symbol after the time slot GP of the subframe1 to the time slot GP of the subframe2 as downlink channels.
Specifically, the device configures all symbols from the first symbol after the slot GP of the subframe1 to the slot GP of the subframe2 as downlink channels. Fig. 3 is a schematic view of pilot configuration of a downlink channel based on a radio frame structure of D2D according to an embodiment of the present invention, as shown in fig. 3, a SubFrame1 and a SubFrame2 in fig. 3 correspond to a SubFrame1 and a SubFrame2, respectively, and regions corresponding to "D2D downlink" and "downlink pilot" in fig. 3 are downlink channels.
S202: and configuring a pilot frequency of the downlink channel on the same frequency domain corresponding to the third symbol and the eighth symbol after the first symbol at intervals of one subcarrier.
Specifically, the device configures a pilot of the downlink channel on the same frequency domain corresponding to the third symbol and the eighth symbol after the first symbol and at an interval of one subcarrier. Referring to fig. 3, the same row of subcarriers of the third symbol and the eighth symbol corresponds to the same frequency domain, and more specifically, each symbol may include eleven subcarriers (i.e., eleven horizontally arranged squares for each column of symbols), and accordingly, the pilot configuration specifically includes: configuring a first subcarrier, a third subcarrier, a fifth subcarrier, a seventh subcarrier, a ninth subcarrier and an eleventh subcarrier on the third symbol and the eighth symbol, respectively, as the pilot. I.e., the pilots are configured as six pairs as shown in fig. 3, the time offset estimation can be better performed.
Further, the subframe1 further includes a time slot DwPTS and a time slot UpPTS, and the time slot GP of the subframe1 is used to separate the time slot DwPTS and the time slot UpPTS. In the TDD mode in the prior art, DwPTS is used to transmit a downlink channel signal, and UpPTS is used to transmit an uplink channel signal.
Further, the radio frame structure further includes subframe 3; accordingly, the slot GP of the subframe2 is used to separate the subframe2 and the subframe 3. Referring to fig. 3, a slot GP of a SubFrame2 separates a SubFrame2 and a SubFrame3 in fig. 3.
In the method for configuring the pilot of the downlink channel based on the radio frame structure of D2D, the pilot of the downlink channel is configured on the same frequency domain corresponding to the third symbol and the eighth symbol after the first symbol after the time slot GP of the subframe1, and at an interval of one subcarrier, so that the pilot of the downlink channel can be configured reasonably and effectively.
On the basis of the above embodiment, each symbol includes eleven subcarriers; correspondingly, the configuring a pilot of the downlink channel on the same frequency domain corresponding to the third symbol and the eighth symbol after the first symbol and at an interval of one subcarrier includes:
configuring a first subcarrier, a third subcarrier, a fifth subcarrier, a seventh subcarrier, a ninth subcarrier and an eleventh subcarrier on the third symbol and the eighth symbol, respectively, as the pilot.
Specifically, the apparatus configures the first subcarrier, the third subcarrier, the fifth subcarrier, the seventh subcarrier, the ninth subcarrier and the eleventh subcarrier on the third symbol and the eighth symbol, respectively, as the pilot. Reference may be made to the above embodiments, which are not described in detail.
In the pilot configuration method for the downlink channel based on the radio frame structure of D2D provided in the embodiments of the present invention, the first subcarrier, the third subcarrier, the fifth subcarrier, the seventh subcarrier, the ninth subcarrier, and the eleventh subcarrier on the third symbol and the eighth symbol are respectively configured as pilots, so that the pilots of the downlink channel can be further configured reasonably and effectively.
On the basis of the above embodiment, the subframe1 further includes a time slot DwPTS and a time slot UpPTS, and the time slot GP of the subframe1 is used to separate the time slot DwPTS and the time slot UpPTS.
Specifically, the subframe1 in the apparatus further includes a time slot DwPTS and a time slot UpPTS, and the time slot GP of the subframe1 is used to separate the time slot DwPTS and the time slot UpPTS. Reference may be made to the above embodiments, which are not described in detail.
The pilot configuration method for the downlink channel based on the radio frame structure of D2D provided in the embodiments of the present invention can further configure the downlink channel reasonably and effectively by using the time slot GP of the subframe1 for separating the time slot DwPTS and the time slot UpPTS, and further configure the pilot of the downlink channel.
On the basis of the above embodiment, the radio frame structure further includes a subframe 3; accordingly, the slot GP of the subframe2 is used to separate the subframe2 and the subframe 3.
Specifically, the slot GP of the subframe2 in the apparatus is used to separate the subframe2 and the subframe 3. Reference may be made to the above embodiments, which are not described in detail.
The pilot configuration method for the downlink channel based on the radio frame structure of D2D provided in the embodiments of the present invention can further configure the downlink channel reasonably and effectively by using the time slot GP separating the subframe2 from the subframe2 of the subframe3, and further configure the pilot of the downlink channel.
Fig. 4 is a schematic structural diagram of a pilot configuration device of a downlink channel based on a radio frame structure of D2D according to an embodiment of the present invention, and as shown in fig. 4, an embodiment of the present invention provides a pilot configuration device of a downlink channel based on a radio frame structure of D2D, where the radio frame structure includes a subframe1 and a subframe2, the device includes a first configuration unit 401 and a second configuration unit 402, where:
the first configuration unit 401 is configured to configure all symbols between a first symbol after the slot GP of the subframe1 and the slot GP of the subframe2 as a downlink channel; the second configuring unit 402 is configured to configure a pilot of the downlink channel on the same frequency domain corresponding to a third symbol and an eighth symbol after the first symbol, and every other subcarrier.
Specifically, the first configuration unit 401 is configured to configure all symbols from a first symbol after the slot GP of the subframe1 to the slot GP of the subframe2 as a downlink channel; the second configuring unit 402 is configured to configure a pilot of the downlink channel on the same frequency domain corresponding to a third symbol and an eighth symbol after the first symbol, and every other subcarrier.
The device for configuring the pilot of the downlink channel based on the radio frame structure of D2D provided in the embodiments of the present invention configures the pilot of the downlink channel on the same frequency domain corresponding to the third symbol and the eighth symbol after the first symbol after the time slot GP of the subframe1, and at an interval of one subcarrier, so that the pilot of the downlink channel can be configured reasonably and effectively.
On the basis of the above embodiment, each symbol includes eleven subcarriers; correspondingly, the second configuration unit 402 is specifically configured to: configuring a first subcarrier, a third subcarrier, a fifth subcarrier, a seventh subcarrier, a ninth subcarrier and an eleventh subcarrier on the third symbol and the eighth symbol, respectively, as the pilot.
Specifically, the second configuration unit 402 is specifically configured to: configuring a first subcarrier, a third subcarrier, a fifth subcarrier, a seventh subcarrier, a ninth subcarrier and an eleventh subcarrier on the third symbol and the eighth symbol, respectively, as the pilot.
The pilot configuration device for the downlink channel based on the radio frame structure of D2D provided in the embodiments of the present invention further can reasonably and effectively configure the pilot of the downlink channel by respectively configuring the first subcarrier, the third subcarrier, the fifth subcarrier, the seventh subcarrier, the ninth subcarrier, and the eleventh subcarrier on the third symbol and the eighth symbol as the pilot.
On the basis of the above embodiment, the subframe1 further includes a time slot DwPTS and a time slot UpPTS, and the time slot GP of the subframe1 is used to separate the time slot DwPTS and the time slot UpPTS.
Specifically, the subframe1 in the apparatus further includes a time slot DwPTS and a time slot UpPTS, and the time slot GP of the subframe1 is used to separate the time slot DwPTS and the time slot UpPTS.
The pilot configuration device for the downlink channel based on the radio frame structure of D2D provided in the embodiments of the present invention can further configure the downlink channel reasonably and effectively by using the time slot GP of the subframe1 for separating the time slot DwPTS and the time slot UpPTS, and further configure the pilot of the downlink channel.
On the basis of the above embodiment, the radio frame structure further includes a subframe 3; accordingly, the slot GP of the subframe2 is used to separate the subframe2 and the subframe 3.
Specifically, the slot GP of the subframe2 in the apparatus is used to separate the subframe2 and the subframe 3.
The pilot configuration device for the downlink channel based on the radio frame structure of D2D provided in the embodiments of the present invention can further configure the downlink channel reasonably and effectively by using the time slot GP separating the subframe2 from the subframe2 of the subframe3, and further configure the pilot of the downlink channel.
The pilot configuration apparatus for a downlink channel based on the radio frame structure of D2D provided in the embodiments of the present invention may be specifically configured to execute the processing flows of the foregoing method embodiments, and its functions are not described herein again, and refer to the detailed description of the foregoing method embodiments.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 5, the electronic device includes: a processor (processor)501, a memory (memory)502, and a bus 503;
the processor 501 and the memory 502 complete communication with each other through a bus 503;
the processor 501 is configured to call program instructions in the memory 502 to perform the methods provided by the above-mentioned method embodiments, for example, including: configuring all symbols from the first symbol after the time slot GP of the subframe1 to the time slot GP of the subframe2 as downlink channels; and configuring a pilot frequency of the downlink channel on the same frequency domain corresponding to the third symbol and the eighth symbol after the first symbol at intervals of one subcarrier.
The present embodiment discloses a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the method provided by the above-mentioned method embodiments, for example, comprising: configuring all symbols from the first symbol after the time slot GP of the subframe1 to the time slot GP of the subframe2 as downlink channels; and configuring a pilot frequency of the downlink channel on the same frequency domain corresponding to the third symbol and the eighth symbol after the first symbol at intervals of one subcarrier.
The present embodiments provide a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform the methods provided by the above method embodiments, for example, including: configuring all symbols from the first symbol after the time slot GP of the subframe1 to the time slot GP of the subframe2 as downlink channels; and configuring a pilot frequency of the downlink channel on the same frequency domain corresponding to the third symbol and the eighth symbol after the first symbol at intervals of one subcarrier.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of the electronic device and the like are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may also be distributed on multiple 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 embodiments are only used for illustrating the technical solutions of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811385052.XA CN111200488A (en) | 2018-11-20 | 2018-11-20 | Method and device for pilot configuration of downlink channel based on D2D radio frame structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811385052.XA CN111200488A (en) | 2018-11-20 | 2018-11-20 | Method and device for pilot configuration of downlink channel based on D2D radio frame structure |
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| CN201811385052.XA Withdrawn CN111200488A (en) | 2018-11-20 | 2018-11-20 | Method and device for pilot configuration of downlink channel based on D2D radio frame structure |
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| WO2018023511A1 (en) * | 2016-08-03 | 2018-02-08 | Lenovo Innovations Limited (Hong Kong) | Device-to-device transmission |
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| CN101330486A (en) * | 2007-06-21 | 2008-12-24 | 大唐移动通信设备有限公司 | Method and apparatus for transmitting down special pilot |
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