CN111200874B - Channel configuration method and device based on D2D wireless frame structure - Google Patents

Channel configuration method and device based on D2D wireless frame structure Download PDF

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CN111200874B
CN111200874B CN201811385085.4A CN201811385085A CN111200874B CN 111200874 B CN111200874 B CN 111200874B CN 201811385085 A CN201811385085 A CN 201811385085A CN 111200874 B CN111200874 B CN 111200874B
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subframe
symbols
channel configuration
frame structure
symbol
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CN111200874A (en
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王栋
徐宏
申博
龚秋莎
冯绍鹏
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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
    • 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
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • 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
    • 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]
    • 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)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention provides a channel configuration method and a device based on a D2D wireless frame structure, wherein the wireless frame structure comprises subframes 1 to 4, and the method comprises the following steps: taking the first symbol after the time slot GP of the subframe 1 as the initial position of downlink channel configuration; configuring all symbols of the subframe 1 and all symbols of the subframe 2 except the last symbol after the initial position as downlink channels; all symbols of subframe 3 and all symbols of subframe 4 are configured as uplink channels. The apparatus performs the above method. According to the channel configuration method and device based on the D2D radio frame structure, the partial symbols of the subframe 1 and the partial symbols of the subframe 2 are configured as downlink channels, all the symbols of the subframe 3 and all the symbols of the subframe 4 are configured as uplink channels, and channel configuration is reasonably carried out, so that UE outside signal coverage can access a network through relay UE.

Description

Channel configuration method and device based on D2D wireless frame structure
Technical Field
The embodiment of the invention relates to the technical field of D2D, in particular to a channel configuration method and device based on a D2D wireless frame structure.
Background
Currently, long term evolution (Long Term Evolution, abbreviated as "LTE") is a main technology of 4G, and provides a high-speed data transmission service for users. In some application scenarios based on LTE technology, for example, power system smart grid data acquisition, downlink transmission of acquisition instructions, uplink transmission of various types of acquired data, where part of smart meters are arranged in places with large path loss and weak coverage, such as under well covers, basements, etc., the signal to noise ratio of uplink reception is very low. In the existing LTE general network, in the edge area of a cell or some special places, such as a basement, the transmitting power of the existing cell is difficult to cover all users, the users cannot access in some places, if the sites of the cell are increased, the network construction cost is increased, and the cost performance is not high.
The D2D communication technology (Device to Device Communication) may be used to perform data transmission between UEs, i.e. the UE in the signal coverage is selected as a relay UE, and data transmission is performed between the relay UE and the UE outside the signal coverage, so that the UE outside the signal coverage accesses the network through the relay UE, but the data transmission needs to occupy D2D radio frames, and however, effective channel configuration (including uplink channel configuration and downlink channel configuration) needs to be performed.
Therefore, how to avoid the above-mentioned drawbacks and reasonably perform channel configuration, so that the UE outside the signal coverage can access the network through the relay UE becomes a problem to be solved.
Disclosure of Invention
Aiming at the problems existing in the prior art, the embodiment of the invention provides a channel configuration method and device based on a D2D wireless frame structure.
In a first aspect, an embodiment of the present invention provides a channel configuration method based on a D2D radio frame structure, where the radio frame structure includes subframes 1 to 4, and the method includes:
taking the first symbol after the time slot GP of the subframe 1 as the initial position of downlink channel configuration;
configuring all symbols of the subframe 1 and all symbols of the subframe 2 except the last symbol after the initial position as downlink channels;
all symbols of subframe 3 and all symbols of subframe 4 are configured as uplink channels.
In a second aspect, an embodiment of the present invention provides a channel configuration apparatus based on a D2D radio frame structure, where the radio frame structure includes subframes 1 to 4, and the apparatus includes:
a first configuration unit, configured to use a first symbol after a slot GP of the subframe 1 as a starting position of downlink channel configuration;
a second configuration unit, configured to configure all symbols of the subframe 1 and all symbols of the subframe 2 except for the last symbol after the start position as downlink channels;
and a third configuration unit, configured to configure all symbols of the subframe 3 and all symbols of the subframe 4 as uplink channels.
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 complete communication with each other through the bus;
the memory stores program instructions executable by the processor, the processor invoking the program instructions capable of performing the method of:
taking the first symbol after the time slot GP of the subframe 1 as the initial position of downlink channel configuration;
configuring all symbols of the subframe 1 and all symbols of the subframe 2 except the last symbol after the initial position as downlink channels;
all symbols of subframe 3 and all symbols of subframe 4 are configured as uplink channels.
In a fourth aspect, embodiments of the present invention provide a non-transitory computer readable storage medium comprising:
the non-transitory computer readable storage medium stores computer instructions that cause the computer to perform the method of:
taking the first symbol after the time slot GP of the subframe 1 as the initial position of downlink channel configuration;
configuring all symbols of the subframe 1 and all symbols of the subframe 2 except the last symbol after the initial position as downlink channels;
all symbols of subframe 3 and all symbols of subframe 4 are configured as uplink channels.
According to the channel configuration method and device based on the D2D radio frame structure, the partial symbols of the subframe 1 and the partial symbols of the subframe 2 are configured as downlink channels, all the symbols of the subframe 3 and all the symbols of the subframe 4 are configured as uplink channels, and channel configuration is reasonably carried out, so that UE outside signal coverage can access a network through relay UE.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a channel configuration method based on a D2D radio frame structure according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a radio frame structure diagram according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a channel configuration according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a channel configuration according to another embodiment of the present invention;
FIG. 5 is a schematic diagram of a channel configuration according to another embodiment of the present invention;
fig. 6 is a schematic diagram of a channel configuration device based on a D2D radio frame structure according to an embodiment of the present invention;
fig. 7 is a schematic diagram of an entity structure of an electronic device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 is a flow chart of a channel configuration method based on a D2D radio frame structure according to an embodiment of the present invention, as shown in fig. 1, in the channel configuration method based on a D2D radio frame structure provided by the embodiment of the present invention, the radio frame structure includes subframes 1 to 4, and the method includes the following steps:
s101: and taking the first symbol after the time slot GP of the subframe 1 as the initial position of downlink channel configuration.
Specifically, the device uses the first symbol after the slot GP of the subframe 1 as the starting position of downlink channel configuration. Fig. 2 is a schematic diagram of a radio frame structure diagram according to an embodiment of the present invention, as shown in fig. 2, each radio frame includes five subframes, namely subframes 0 to 4, and the subframes 0 are left. It should be noted that: subframe 1 is a special subframe, and includes three time slots, i.e. DwPTS, GP and UpPTS, where in the TDD mode in the prior art, dwPTS is used to transmit a downlink signal, upPTS is used to transmit an uplink signal, and timeslot GP is used as a separation between DwPTS and UpPTS, i.e. the embodiment of the invention discards DwPTS and uses UpPTS to transmit a downlink signal, and fig. 3 is a schematic diagram of channel configuration in the embodiment of the invention, and as shown in fig. 3, the first symbol after timeslot GP of subframe 1 needs to be preconfigured as the starting position of downlink configuration before transmitting a downlink signal.
S102: and configuring all symbols of the subframe 1 and all symbols of the subframe 2 except the last symbol after the starting position as downlink channels.
Specifically, the device configures all symbols of the subframe 1 and all symbols of the subframe 2 except the last symbol after the start position as downlink channels. Referring to fig. 3, the "D2D downlink channel" in fig. 3 is configured.
S103: all symbols of subframe 3 and all symbols of subframe 4 are configured as uplink channels.
Specifically, the apparatus configures all symbols of the subframe 3 and all symbols of the subframe 4 as uplink channels. Referring to fig. 3, after the uplink channel is configured, the uplink channel signal may be transmitted, and it should be noted that: the signal transmitted to the relay UE by the UE outside the signal coverage is used as the signal of the D2D uplink channel; the signal of the relay UE is transmitted to the UE outside the signal coverage as a signal of the downlink channel of D2D. Namely, after the configuration of the downlink channel and the uplink channel is completed, the configuration of the channels is completed, so that signal transmission between the UE outside the signal coverage and the relay UE can be performed.
According to the channel configuration method based on the D2D radio frame structure, the partial symbols of the subframe 1 and the partial symbols of the subframe 2 are configured as downlink channels, all the symbols of the subframe 3 and all the symbols of the subframe 4 are configured as uplink channels, and channel configuration is reasonably carried out, so that UE outside signal coverage can access a network through relay UE.
On the basis of the foregoing embodiment, the configuration of the uplink channel further includes:
configuring all symbols of the subframe 3 and part of symbols of the subframe 4 as uplink channels; the partial symbols are all symbols of the subframe 4 except the last symbol.
Specifically, the device configures all symbols of the subframe 3 and part of symbols of the subframe 4 as uplink channels; the partial symbols are all symbols of the subframe 4 except the last symbol. Fig. 4 is a schematic diagram of a channel configuration according to another embodiment of the present invention, and as shown in fig. 4, the last symbol may be an SC-FDMA symbol, which is used for the D2D uplink guard interval.
According to the channel configuration method based on the D2D radio frame structure, all symbols of the subframe 3 and part of symbols of the subframe 4 are configured as uplink channels, so that channel configuration is further reasonably carried out, and UE outside signal coverage can be enabled to access a network through relay UE.
On the basis of the foregoing embodiment, the configuration of the uplink channel further includes:
the pilots arranged in columns are configured.
Specifically, the apparatus configures pilots arranged in columns. Fig. 5 is a schematic diagram of channel configuration according to another embodiment of the present invention, as shown in fig. 5, the pilot frequencies arranged in a configuration column may be two columns, and further, the fifth symbol of the subframe 3 may be configured as the first column pilot frequency; the fifth symbol of the subframe 4 may be configured as a second column pilot.
According to the channel configuration method based on the D2D wireless frame structure, which is provided by the embodiment of the invention, the channel configuration is further reasonably carried out by configuring the pilot frequency arranged in the column, so that the UE outside the signal coverage can access the network through the relay UE.
On the basis of the above embodiment, the pilots are in two columns.
Specifically, the pilot frequency in the device is two columns. Reference may be made to the above embodiments, and no further description is given.
According to the channel configuration method based on the D2D wireless frame structure, the pilot frequency is configured into two columns, so that the channel configuration is further reasonably carried out, and UE outside signal coverage can be enabled to access the network through the relay UE.
On the basis of the above embodiment, the method further includes:
configuring a fifth symbol of the subframe 3 as a first column pilot; the fifth symbol of the subframe 4 is configured as a second column pilot.
Specifically, the device configures the fifth symbol of the subframe 3 as a first column pilot; the fifth symbol of the subframe 4 is configured as a second column pilot. Reference may be made to the above embodiments, and no further description is given.
According to the channel configuration method based on the D2D radio frame structure, the fifth symbol of the subframe 3 and the fifth symbol of the subframe 4 are respectively configured to be the first column pilot frequency and the second column pilot frequency, so that channel configuration is further reasonably carried out, and UE outside signal coverage can be enabled to access the network through relay UE.
Fig. 6 is a schematic structural diagram of a channel configuration device based on a D2D radio frame structure according to an embodiment of the present invention, and as shown in fig. 6, the embodiment of the present invention provides a channel configuration device based on a D2D radio frame structure, which includes a first configuration unit 601, a second configuration unit 602, and a third configuration unit 603, wherein:
the first configuration unit 601 is configured to use a first symbol after the slot GP of the subframe 1 as a starting position of downlink channel configuration; the second configuration unit 602 is configured to configure all symbols of the subframe 1 and all symbols of the subframe 2 except the last symbol after the start position as downlink channels; the third configuration unit 603 is configured to configure all symbols of the subframe 3 and all symbols of the subframe 4 as uplink channels.
Specifically, the first configuration unit 601 is configured to use a first symbol after the slot GP of the subframe 1 as a starting position of downlink channel configuration; the second configuration unit 602 is configured to configure all symbols of the subframe 1 and all symbols of the subframe 2 except the last symbol after the start position as downlink channels; the third configuration unit 603 is configured to configure all symbols of the subframe 3 and all symbols of the subframe 4 as uplink channels.
According to the channel configuration device based on the D2D radio frame structure, the partial symbols of the subframe 1 and the partial symbols of the subframe 2 are configured as downlink channels, all the symbols of the subframe 3 and all the symbols of the subframe 4 are configured as uplink channels, and channel configuration is reasonably carried out, so that UE outside signal coverage can access a network through relay UE.
On the basis of the above embodiment, the third configuration unit 603 is specifically configured to: configuring all symbols of the subframe 3 and part of symbols of the subframe 4 as uplink channels; the partial symbols are all symbols of the subframe 4 except the last symbol.
Specifically, the third configuration unit 603 is specifically configured to: configuring all symbols of the subframe 3 and part of symbols of the subframe 4 as uplink channels; the partial symbols are all symbols of the subframe 4 except the last symbol.
According to the channel configuration device based on the D2D radio frame structure, provided by the embodiment of the invention, the channel configuration is further reasonably carried out by configuring all symbols of the subframe 3 and part of symbols of the subframe 4 as uplink channels, so that the UE outside signal coverage can access the network through the relay UE.
On the basis of the above embodiment, the third configuration unit 603 is specifically configured to: the pilots arranged in columns are configured.
Specifically, the third configuration unit 603 is specifically configured to: the pilots arranged in columns are configured.
The channel configuration device based on the D2D wireless frame structure provided by the embodiment of the invention further reasonably carries out channel configuration by configuring the pilot frequency arranged in the column, thereby enabling the UE outside signal coverage to access the network through the relay UE.
The channel configuration device based on the D2D radio frame structure provided in the embodiment of the present invention may be specifically used to execute the processing flow of each method embodiment, and the functions thereof are not described herein in detail, and reference may be made to the detailed description of the method embodiments.
Fig. 7 is a schematic diagram of an entity structure of an electronic device according to an embodiment of the present invention, as shown in fig. 7, where the electronic device includes: a processor (processor) 701, a memory (memory) 702, and a bus 703;
wherein, the processor 701 and the memory 702 complete communication with each other through the bus 703;
the processor 701 is configured to invoke the program instructions in the memory 702 to perform the methods provided in the above method embodiments, for example, including: taking the first symbol after the time slot GP of the subframe 1 as the initial position of downlink channel configuration; configuring all symbols of the subframe 1 and all symbols of the subframe 2 except the last symbol after the initial position as downlink channels; all symbols of subframe 3 and all symbols of subframe 4 are configured as uplink channels.
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, are capable of performing the methods provided by the above-described method embodiments, for example comprising: taking the first symbol after the time slot GP of the subframe 1 as the initial position of downlink channel configuration; configuring all symbols of the subframe 1 and all symbols of the subframe 2 except the last symbol after the initial position as downlink channels; all symbols of subframe 3 and all symbols of subframe 4 are configured as uplink channels.
The present embodiment provides a non-transitory computer-readable storage medium storing computer instructions that cause a computer to perform the methods provided by the above-described method embodiments, for example, including: taking the first symbol after the time slot GP of the subframe 1 as the initial position of downlink channel configuration; configuring all symbols of the subframe 1 and all symbols of the subframe 2 except the last symbol after the initial position as downlink channels; all symbols of subframe 3 and all symbols of subframe 4 are configured as uplink channels.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware associated with program instructions, where the foregoing program may be stored in a computer readable storage medium, and when executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of electronic devices and the like are merely illustrative, wherein the elements described as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution 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, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A channel configuration method based on a D2D radio frame structure, the radio frame structure including subframes 0 to 4, and the subframes 0 being left free, the method comprising:
taking the first symbol after the time slot GP of the subframe 1 as the initial position of downlink channel configuration;
configuring all symbols of the subframe 1 and all symbols of the subframe 2 except the last symbol after the initial position as downlink channels;
all symbols of subframe 3 and all symbols of subframe 4 are configured as uplink channels.
2. The method of claim 1, wherein the configuration of the uplink channel further comprises:
configuring all symbols of the subframe 3 and part of symbols of the subframe 4 as uplink channels; the partial symbols are all symbols of the subframe 4 except the last symbol.
3. The method according to claim 1 or 2, wherein the configuration of the uplink channel further comprises:
the pilots arranged in columns are configured.
4. The method of claim 3, wherein the pilots are in two columns.
5. The method according to claim 4, wherein the method further comprises:
configuring a fifth symbol of the subframe 3 as a first column pilot;
the fifth symbol of the subframe 4 is configured as a second column pilot.
6. A channel configuration apparatus based on a D2D radio frame structure, the radio frame structure including subframes 0 to 4, the subframes 0 being left free, the apparatus comprising:
a first configuration unit, configured to use a first symbol after a slot GP of the subframe 1 as a starting position of downlink channel configuration;
a second configuration unit, configured to configure all symbols of the subframe 1 and all symbols of the subframe 2 except for the last symbol after the start position as downlink channels;
and a third configuration unit, configured to configure all symbols of the subframe 3 and all symbols of the subframe 4 as uplink channels.
7. The apparatus of claim 6, wherein the third configuration unit is specifically configured to:
configuring all symbols of the subframe 3 and part of symbols of the subframe 4 as uplink channels; the partial symbols are all symbols of the subframe 4 except the last symbol.
8. The apparatus according to claim 6 or 7, wherein the third configuration unit is specifically configured to:
the pilots arranged in columns are configured.
9. An electronic device, comprising: a processor, a memory, and a bus, wherein,
the processor and the memory complete communication 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 1-5.
10. A non-transitory computer readable storage medium storing computer instructions for execution by a processor to cause the computer to perform the method of any one of claims 1 to 5.
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