CN111200867A - D2D-based downlink channel sending method and terminal - Google Patents
D2D-based downlink channel sending method and terminal Download PDFInfo
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- CN111200867A CN111200867A CN201811385092.4A CN201811385092A CN111200867A CN 111200867 A CN111200867 A CN 111200867A CN 201811385092 A CN201811385092 A CN 201811385092A CN 111200867 A CN111200867 A CN 111200867A
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- downlink channel
- psbch
- pssch
- synchronization signal
- periodically
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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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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- 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
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
Abstract
The embodiment of the invention provides a method and a terminal for sending a downlink channel based on D2D, wherein the method comprises the following steps: and periodically and sequentially transmitting the synchronization signal, the PSBCH and the PSSCH, wherein the synchronization signal, the PSBCH and the PSSCH periodically time division multiplex downlink channel resources. The terminal executes the method. The downlink channel transmission method and the terminal based on D2D provided by the embodiment of the invention can simply and reliably transmit the downlink channel based on D2D by periodically and sequentially transmitting the synchronization signal, the PSBCH and the PSSCH and periodically and time-division multiplexing the downlink channel resources.
Description
Technical Field
The embodiment of the invention relates to the technical field of channel processing, in particular to a downlink channel sending method and a terminal based on D2D.
Background
D2D Communication technology (Device to Device Communication) performs data transmission between UEs, that is, selects UEs in signal coverage as relay UEs, and performs data transmission between the relay UEs and UEs outside signal coverage, so that the UEs outside signal coverage access the network through the relay UEs, and the downlink channel refers to a channel transmitted by the relay UEs to the UEs outside signal coverage, and for downlink channel transmission, the relation relates to initial synchronization, broadcast reception, service data reception, and the like of the UEs outside signal coverage when the relay UEs access, but there is no effective method for transmitting downlink channel based on D2D in the prior art.
Therefore, how to simply and reliably transmit the downlink channel based on D2D while avoiding the above-mentioned drawbacks is a problem to be solved.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a downlink channel sending method and a terminal based on D2D.
In a first aspect, an embodiment of the present invention provides a method for transmitting a downlink channel based on D2D, where the downlink channel includes a synchronization signal, a PSBCH, and a PSSCH, and the method includes:
and periodically and sequentially transmitting the synchronization signal, the PSBCH and the PSSCH, wherein the synchronization signal, the PSBCH and the PSSCH periodically time division multiplex downlink channel resources.
In a second aspect, an embodiment of the present invention provides a terminal for transmitting a downlink channel based on D2D, where the downlink channel includes a synchronization signal, a PSBCH, and a PSSCH, and the terminal includes:
and a sending unit, configured to send the synchronization signal, the PSBCH, and the PSSCH in sequence periodically, where the synchronization signal, the PSBCH, and the PSSCH periodically time-division multiplex downlink channel resources.
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:
and periodically and sequentially transmitting the synchronization signal, the PSBCH and the PSSCH, wherein the synchronization signal, the PSBCH and the PSSCH periodically time division multiplex downlink channel resources.
In a fourth aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium, including:
and periodically and sequentially transmitting the synchronization signal, the PSBCH and the PSSCH, wherein the synchronization signal, the PSBCH and the PSSCH periodically time division multiplex downlink channel resources.
The downlink channel transmission method and the terminal based on D2D provided by the embodiment of the invention can simply and reliably transmit the downlink channel based on D2D by periodically and sequentially transmitting the synchronization signal, the PSBCH and the PSSCH and periodically and time-division multiplexing the downlink channel resources.
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 flow chart of a method for transmitting a downlink channel based on D2D according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating the sending of a synchronization signal according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating PSBCH transmission according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating PSSCH transmission according to an embodiment of the invention;
fig. 5 is a schematic diagram of pilot configuration of a downlink channel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a sending terminal of a downlink channel based on D2D according to an embodiment of the present invention;
fig. 7 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. 1 is a schematic flow chart of a downlink channel transmission method based on D2D in an embodiment of the present invention, and as shown in fig. 1, a downlink channel transmission method based on D2D provided in an embodiment of the present invention includes a synchronization signal, a PSBCH, and a PSSCH, and the method includes the following steps:
s101: and periodically and sequentially transmitting the synchronization signal, the PSBCH and the PSSCH, wherein the synchronization signal, the PSBCH and the PSSCH periodically time division multiplex downlink channel resources.
Specifically, the terminal periodically and sequentially transmits the synchronization signal, the PSBCH, and the PSSCH, wherein the synchronization signal, the PSBCH, and the PSSCH periodically time-division multiplex downlink channel resources. The terminal may be a relay UE, the PSBCH is a physical broadcast channel, and the PSSCH is a physical shared channel, fig. 2 is a schematic diagram of sending a synchronization signal according to an embodiment of the present invention, as shown in fig. 2, a downlink channel resource occupied by the synchronization signal is a subframe in a radio frame structure of D2D, where the specific subframe may include: referring to fig. 2, all symbols from the first symbol after the slot GP of the SubFrame1 to the slot GP of the SubFrame2 in the radio frame structure, referring to the SubFrame1 and the SubFrame2 in fig. 2 correspond to the SubFrame1 and the SubFrame2, respectively, and each column of squares in fig. 2 corresponds to one symbol, so that the downlink channel resource occupied by sending the synchronization signal is 12 symbols as shown by "1" in fig. 2. Fig. 3 is a schematic diagram of sending PSBCH according to an embodiment of the present invention, and as shown in fig. 3, the downlink channel resource occupied by sending PSBCH is 12 symbols as shown in "3" in fig. 3, and for a specific description, reference may be made to a description of sending a synchronization signal, which is not described again. Fig. 4 is a schematic diagram of sending a psch according to an embodiment of the present invention, and as shown in fig. 4, the downlink channel resource occupied by sending the psch is 12 symbols shown as "4" in fig. 4.
The specific downlink channel sending steps may be as follows: firstly, sending a synchronization signal, wherein a downlink channel resource occupied by the synchronization signal is 12 symbols as shown by '1' in fig. 2; then, a PSBCH is sent, and the downlink channel resource occupied by the PSBCH is 12 symbols as shown in "3" in fig. 3; the PSSCH is transmitted, and the downlink channel resource occupied by the PSSCH is 12 symbols as shown by '4' in FIG. 4. It should be noted that: since the 12 symbols respectively corresponding to fig. 2 to 4 are the same downlink channel resource, the synchronization signal, the PSBCH, and the PSSCH periodically time-division multiplex the downlink channel resource. Further, the downlink channel may be periodically and cyclically transmitted in a manner of transmitting the synchronization signal first, transmitting the PSBCH again, and transmitting the PSSCH again. Namely, the process of firstly transmitting the synchronous signal, then transmitting the PSBCH and then transmitting the PSSCH is transmitted once in the first period, the process of firstly transmitting the synchronous signal, then transmitting the PSBCH and then transmitting the PSSCH is transmitted once in the second period, and the like.
The synchronization signal, the PSBCH and the PSSCH can be sent to the UE outside the signal coverage in sequence periodically, so that interaction between the relay UE and the UE outside the signal coverage is realized.
And configuring 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 at an interval of one subcarrier. Fig. 5 is a schematic diagram of pilot configuration of a downlink channel according to an embodiment of the present invention, as shown in fig. 5, the same row of subcarriers of the third symbol and the eighth symbol corresponds to the same frequency domain, each symbol may include eleven subcarriers (that is, each column of symbols has eleven horizontally arranged squares), and 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 of the downlink channel, that is, the pilots are configured as six pairs as shown in fig. 5, so that time offset estimation can be better performed.
According to the downlink channel transmission method based on D2D provided by the embodiment of the invention, the synchronization signal, the PSBCH and the PSSCH are periodically and sequentially transmitted, and the downlink channel resource is periodically time-division multiplexed, so that the downlink channel based on D2D can be simply and reliably transmitted.
On the basis of the above embodiment, the downlink channel resource is a subframe in a radio frame structure of D2D.
Specifically, the downlink channel resource in the terminal is a subframe in a radio frame structure of D2D. Reference may be made to the above embodiments, which are not described in detail.
The D2D-based downlink channel transmission method provided by the embodiment of the invention can further simply and reliably transmit the D2D-based downlink channel by occupying the subframe in the D2D radio frame structure and using the subframe as a downlink channel resource.
On the basis of the above embodiment, the subframe includes all symbols from the first symbol after the slot GP of the subframe1 to the slot GP of the subframe2 in the radio frame structure.
Specifically, the subframe in the terminal includes all symbols from a first symbol after the slot GP of the subframe1 to the slot GP of the subframe2 in the radio frame structure. Reference may be made to the above embodiments, which are not described in detail.
The D2D-based downlink channel transmission method provided in the embodiment of the present invention can further simply and reliably transmit the D2D-based downlink channel by occupying all symbols from the first symbol after the slot GP of the subframe1 to the slot GP of the subframe2, and using the occupied symbols as downlink channel resources.
On the basis of the above embodiment, the method further includes:
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 terminal 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 every other subcarrier. Reference may be made to the above embodiments, which are not described in detail.
The D2D-based downlink channel transmission method provided by the embodiment of the invention can reasonably and effectively configure the pilot frequency of the downlink channel and better perform time offset estimation.
On the basis of the foregoing embodiment, the periodically and sequentially transmitting the synchronization signal, the PSBCH, and the PSSCH includes:
and periodically and sequentially sending the synchronization signal, the PSBCH and the PSSCH to UE outside signal coverage.
Specifically, the terminal periodically and sequentially sends the synchronization signal, the PSBCH, and the PSSCH to the UE outside the signal coverage. Reference may be made to the above embodiments, which are not described in detail.
The downlink channel sending method based on D2D provided by the embodiment of the invention can realize interaction between relay UE and UE outside signal coverage.
Fig. 6 is a schematic structural diagram of a transmitting terminal based on a downlink channel of D2D according to an embodiment of the present invention, and as shown in fig. 6, an embodiment of the present invention provides a transmitting terminal based on a downlink channel of D2D, where the downlink channel includes a synchronization signal, a PSBCH, and a PSSCH, the terminal includes a transmitting unit 601, where:
a sending unit 601 is configured to send the synchronization signal, the PSBCH, and the PSSCH periodically in sequence, where the synchronization signal, the PSBCH, and the PSSCH periodically time-division multiplex downlink channel resources.
Specifically, the transmitting unit 601 is configured to periodically and sequentially transmit the synchronization signal, the PSBCH, and the PSSCH, where the synchronization signal, the PSBCH, and the PSSCH periodically time-division multiplex downlink channel resources.
The transmitting terminal of the downlink channel based on the D2D provided in the embodiment of the present invention can simply and reliably transmit the downlink channel based on the D2D by periodically sequentially transmitting the synchronization signal, the PSBCH, and the PSSCH, and periodically time-division multiplexing the downlink channel resources.
On the basis of the above embodiment, the downlink channel resource is a subframe in a radio frame structure of D2D.
Specifically, the downlink channel resource in the terminal is a subframe in a radio frame structure of D2D.
The D2D-based downlink channel transmitting terminal provided in the embodiment of the present invention can further simply and reliably transmit the D2D-based downlink channel by occupying the subframe in the D2D radio frame structure and using the subframe as a downlink channel resource.
On the basis of the above embodiment, the subframe includes all symbols from the first symbol after the slot GP of the subframe1 to the slot GP of the subframe2 in the radio frame structure.
Specifically, the subframe in the terminal includes all symbols from a first symbol after the slot GP of the subframe1 to the slot GP of the subframe2 in the radio frame structure.
The D2D-based downlink channel sending terminal provided in the embodiment of the present invention can further simply and reliably send the D2D-based downlink channel by occupying all symbols from the first symbol after the slot GP of the subframe1 to the slot GP of the subframe2, and using the occupied symbols as downlink channel resources.
The sending terminal based on the D2D downlink channel provided in the embodiment of the present invention may be specifically configured to execute the processing flows of the above method embodiments, and its functions are not described herein again, and refer to the detailed description of the above method embodiments.
Fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 7, the electronic device includes: a processor (processor)701, a memory (memory)702, and a bus 703;
the processor 701 and the memory 702 complete mutual communication through a bus 703;
the processor 701 is configured to call the program instructions in the memory 702 to execute the methods provided by the above-mentioned method embodiments, for example, including: and periodically and sequentially transmitting the synchronization signal, the PSBCH and the PSSCH, wherein the synchronization signal, the PSBCH and the PSSCH periodically time division multiplex downlink channel resources.
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: and periodically and sequentially transmitting the synchronization signal, the PSBCH and the PSSCH, wherein the synchronization signal, the PSBCH and the PSSCH periodically time division multiplex downlink channel resources.
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: and periodically and sequentially transmitting the synchronization signal, the PSBCH and the PSSCH, wherein the synchronization signal, the PSBCH and the PSSCH periodically time division multiplex downlink channel resources.
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.
Claims (10)
1. A method for transmitting a downlink channel based on D2D, wherein the downlink channel comprises a synchronization signal, a PSBCH and a PSSCH, the method comprising:
and periodically and sequentially transmitting the synchronization signal, the PSBCH and the PSSCH, wherein the synchronization signal, the PSBCH and the PSSCH periodically time division multiplex downlink channel resources.
2. The method of claim 1, wherein the downlink channel resource is a subframe in a radio frame structure of D2D.
3. The method of claim 2, wherein the subframe comprises all symbols from a first symbol after a slot GP of subframe1 to the slot GP of subframe2 in the radio frame structure.
4. The method of claim 3, further comprising:
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.
5. The method of any of claims 1 to 4, wherein the periodically sequentially transmitting the synchronization signal, the PSBCH and the PSSCH comprises:
and periodically and sequentially sending the synchronization signal, the PSBCH and the PSSCH to UE outside signal coverage.
6. A transmitting terminal of a downlink channel based on D2D, the downlink channel including a synchronization signal, a PSBCH, and a PSSCH, the terminal comprising:
and a sending unit, configured to send the synchronization signal, the PSBCH, and the PSSCH in sequence periodically, where the synchronization signal, the PSBCH, and the PSSCH periodically time-division multiplex downlink channel resources.
7. The terminal of claim 6, wherein the downlink channel resource is a subframe in a radio frame structure of D2D.
8. The terminal of claim 7, wherein the subframe comprises all symbols from a first symbol after a slot GP of subframe1 to a slot GP of subframe2 in the radio frame structure.
9. An electronic device, comprising: 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 the method of any of claims 1 to 5.
10. A non-transitory computer-readable storage medium storing computer instructions that cause a computer to perform the method of any one of claims 1 to 5.
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| CN201811385092.4A CN111200867A (en) | 2018-11-20 | 2018-11-20 | D2D-based downlink channel sending method and terminal |
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| CN201811385092.4A CN111200867A (en) | 2018-11-20 | 2018-11-20 | D2D-based downlink channel sending method and terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112911521A (en) * | 2021-02-02 | 2021-06-04 | 北京达源环保科技有限公司 | D2D communication-based intelligent monitoring method and system for sewage treatment plant |
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| CN106575993A (en) * | 2014-08-06 | 2017-04-19 | 夏普株式会社 | Synchronization signals for device-to-device communications |
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