WO2018082469A1

WO2018082469A1 - Method and device for indicating direct current subcarrier and electronic device

Info

Publication number: WO2018082469A1
Application number: PCT/CN2017/107385
Authority: WO
Inventors: 李剑; 郝鹏; 鲁照华
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-11-04
Filing date: 2017-10-23
Publication date: 2018-05-11
Also published as: CN108024265B; CN108024265A

Abstract

Disclosed are a method and device for indicating a direct current (DC) subcarrier and an electronic device. The method comprises: a first communication node transmits to a second communication node one or more sets of virtual carrier information, where the virtual carrier information at least comprises one of the following: the number of virtual carriers, the bandwidth of the virtual carriers, virtual carrier index information, a subcarrier spacing used by the virtual carriers, and fast Fourier transform (FFT) points employed by the virtual carriers.

Description

Method and device for indicating DC subcarrier, electronic device

Technical field

The present disclosure relates to the field of Long Term Evolution (LTE) and NR (New Radio) mobile communication networks, and particularly relates to a Direct Current (DC) subcarrier under NR or LTE and NR coexistence. Method and device, electronic device.

Background technique

The subcarriers at the carrier center frequency point are called DC subcarriers. Due to the influence of the local crystal leakage, high interference problems may occur in adjacent multiple subcarriers. In the LTE system, DC subcarriers are not applied for downlink downlink. Transmission, the uplink uses a method of shifting 1/2 subcarriers due to the continuous allocation of the entire system bandwidth.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a method and device for indicating a DC subcarrier, and an electronic device, so that the receiving end can know whether there is a DC subcarrier in the receiving bandwidth, thereby obtaining a corresponding data receiving method to ensure correct data reception, and at the same time, It effectively reduces signaling overhead and is more flexible to adapt to the different needs of 5G NR scenarios.

The method for indicating a DC DC subcarrier provided by the embodiment of the present invention includes:

The first communication node sends one or more sets of virtual carrier information to the second communication node, wherein the virtual carrier information includes at least one of the following:

The number of virtual carriers, the bandwidth of the virtual carrier, the virtual carrier index information, the subcarrier spacing used by the virtual carrier, and the number of fast Fourier transform FFT points used by the virtual carrier.

A method for indicating a DC DC subcarrier provided by another embodiment of the present invention includes:

The second communication node receives at least one of the following ones: one or more sets of virtual carrier information, subcarrier spacing indication information, group identification information of virtual carrier information, resource allocation range information, dynamic resource allocation indication information, Physical carrier indication information;

The second communication node determines the location of the DC subcarrier based on the received message, and determines whether there is a DC subcarrier in the actual data transmission, and selects a different method for data reception according to the judgment result.

The device for indicating a DC DC subcarrier provided by the embodiment of the present invention is applied to a first communication node, where the device includes:

And a sending unit, configured to send one or more sets of virtual carrier information to the second communications node, where the virtual carrier information includes at least one of the following:

An apparatus for a DC subcarrier provided by another embodiment of the present invention is applied to a second communication node, where the apparatus includes:

The receiving unit is configured to receive at least one of the following: the one or more sets of virtual carrier information, the subcarrier spacing indication information, the group identification information of the virtual carrier information, the resource allocation range information, and the dynamic resource allocation indication information The physical carrier indication information; the received message determines the location of the DC subcarrier, and determines whether there is a DC subcarrier in the actual data transmission, and selects different methods for data reception according to the judgment result.

An electronic device provided by an embodiment of the present invention includes a processor and a memory storing the processor executable instructions, when the instruction is executed by the processor, the processor performs the method step of indicating a DC subcarrier .

Embodiments of the present invention also provide a computer readable storage medium having stored thereon computer executable instructions that, when executed by a processor, implement any of the methods described above.

In the solution of the embodiment of the present invention, the first communications node sends one or more sets of virtual carrier information to the second communications node, where the virtual carrier information includes at least one of the following: the number of virtual carriers, the bandwidth of the virtual carrier, Virtual carrier index information, subcarrier spacing used by virtual carriers, virtual The fast Fourier transform FFT points used by the pseudo carrier. The second communication node receives at least one of the following ones: one or more sets of virtual carrier information, subcarrier spacing indication information, group identification information of virtual carrier information, resource allocation range information, dynamic resource allocation indication information, The physical carrier indicates information; the second communication node determines the location of the DC subcarrier based on the received message, and determines whether there is a DC subcarrier in the actual data transmission, and selects a different method for data reception according to the judgment result. The solution of the embodiment of the present invention enables the receiving end to know whether there is a DC subcarrier in the receiving bandwidth, thereby obtaining a corresponding data receiving method, ensuring correct data reception, and effectively reducing signaling overhead, and more flexibly adapting to the 5G NR. Different requirements of the scene.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

DRAWINGS

FIG. 1 is a schematic flowchart 1 of a method for indicating a DC subcarrier according to an embodiment of the present invention;

2 is a second schematic flowchart of a method for indicating a DC subcarrier according to an embodiment of the present invention;

FIG. 3 is a first schematic diagram showing the relationship between the number of virtual carriers, the physical carrier bandwidth, the subcarrier spacing, and the number of FFT points according to an embodiment of the present invention;

4 is a second schematic diagram showing the relationship between the number of virtual carriers, the physical carrier bandwidth, the subcarrier spacing, and the number of FFT points according to an embodiment of the present invention;

FIG. 5 is a schematic diagram 3 of a relationship between a virtual carrier number, a physical carrier bandwidth, a subcarrier spacing, and an FFT point according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a receiving bandwidth of a second communication node according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of actual resource allocation of a second communication node according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic diagram of actual resource allocation of a second communication node according to an embodiment of the present invention; FIG.

FIG. 9 is a signaling flowchart 1 of an embodiment of the present invention;

FIG. 10 is a schematic diagram of a resource block grid RB Grid according to an embodiment of the present invention; FIG.

FIG. 11 is a schematic diagram of actual resource allocation of a second communication node according to an embodiment of the present invention; FIG.

12 is a signaling flowchart 2 of an embodiment of the present invention;

FIG. 13 is a first schematic structural diagram of an apparatus for indicating a DC subcarrier according to an embodiment of the present invention; FIG.

FIG. 14 is a second schematic structural diagram of an apparatus for indicating a DC subcarrier according to an embodiment of the present invention; FIG.

FIG. 15 is a schematic structural diagram of an electronic device according to an embodiment of the present invention; FIG.

FIG. 16 is a fourth schematic diagram showing the relationship between the number of virtual carriers, the physical carrier bandwidth, the subcarrier spacing, and the number of FFT points according to an embodiment of the present invention.

detailed description

In the RAN1#86 meeting of the 3rd Generation Partnership Project (3GPP), in the next research work of NR, it is considered that the receiving end needs to know whether there is a DC subcarrier on the receiving bandwidth, which may be a regulation. Or notified by signaling. Wherein, if there is no DC subcarrier, all subcarriers in the receiving bandwidth are transmitted; if there is a DC subcarrier, the operation method is to be studied. Regardless of how the transmitting end operates on the DC subcarrier, there must be a mechanism for the receiving end to know whether there is a DC subcarrier in the receiving bandwidth, thereby obtaining a corresponding data receiving method and ensuring correct reception of the data, which is currently to be solved. The problem, a simple method is to directly inform the terminal of the location of the DC subcarrier by signaling, which will cause huge signaling overhead.

The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

1 is a schematic flowchart 1 of a method for indicating a DC subcarrier according to an embodiment of the present invention. The method for indicating a DC subcarrier in this example is applied to a first communication node, as shown in FIG. 1, the method for indicating a DC subcarrier is shown in FIG. Includes the following steps:

Step 101: The first communication node sends one or more sets of virtual carrier information to the second communication node, where the virtual carrier information includes at least one of the following: the number of virtual carriers, the bandwidth of the virtual carrier, the virtual carrier index information, The subcarrier spacing used by the virtual carrier and the number of FFT points used by the virtual carrier.

In the embodiment of the present invention, the method further includes:

The first communication node sends at least one of the following: subcarrier spacing indication information, group identification information of virtual carrier information to the second communication node;

The subcarrier spacing indication information, or the group identification information of the virtual carrier information, or the group identifier information of the subcarrier spacing indication information and the virtual carrier information, and one of the one or more sets of virtual carrier information. The group virtual carrier information has a binding relationship.

In the embodiment of the present invention, the method further includes:

The first communication node sends the intra-group resource allocation range information of the set of virtual carrier information in the binding relationship to the second communication node, where the intra-group resource allocation range information includes a size and a location, where the location refers to a relative positional relationship between the resource allocation range and each virtual carrier in the group; the resource allocation range is distributed on one or more of the virtual carriers.

In the embodiment of the present invention, the method further includes:

The first communication node sends dynamic resource allocation indication information to the second communication node, where the dynamic resource allocation indication information refers to a time/frequency domain resource occupied by the actual data transmission.

In the embodiment of the present invention, the method further includes:

The first communication node sends the physical carrier indication information to the second communication node, where the physical carrier indication information refers to at least one of the following: a bandwidth of the physical carrier, a quantity of the physical carrier, physical carrier identification information, and a spectrum resource occupied by the physical carrier.

In the embodiment of the present invention, the first communication node indicates, according to information sent to the second communication node, whether the current resource allocation of the second communication node includes DC subcarriers of one or more virtual carriers.

In the embodiment of the present invention, if the current resource allocation of the second communication node includes the DC subcarrier of the virtual carrier, the first communication node performs rate matching, and accordingly, the DC subcarrier of the virtual carrier does not map data.

In the embodiment of the present invention, the virtual carrier index information has a corresponding relationship with the location of the physical carrier.

In the embodiment of the present invention, the number of the virtual carriers and the bandwidth of the virtual carrier are related to at least the bandwidth of the physical carrier, the subcarrier spacing of the virtual carrier, and the number of FFT points.

In the embodiment of the present invention, the resource allocation range information is determined based on the capability reported by the second communication node, and the capability includes a supported FFT point, or a supported bandwidth, or a supported FFT point and a supported bandwidth.

In the embodiment of the present invention, the subcarrier spacings used by the virtual carriers in the multiple sets of virtual carrier information have a 2 ⁿ multiple relationship with each other, where n is an integer.

In the embodiment of the present invention, the subcarrier spacing indication information refers to a subcarrier spacing used when the second communication node receives data.

In the embodiment of the present invention, the one or more sets of virtual carrier information, subcarrier spacing indication information, group identification information of virtual carrier information, resource allocation range information, dynamic resource allocation indication information, and physical carrier indication information are carried in the following The at least one message is sent: a broadcast message, a system message, and a downlink control message.

2 is a schematic flowchart 2 of a method for indicating a DC subcarrier according to an embodiment of the present invention. The method for indicating a DC subcarrier in this example is applied to a second communication node. As shown in FIG. 2, the method for indicating a DC subcarrier is shown in FIG. 2 . Includes the following steps:

Step 201: The second communication node receives at least one of the following ones: one or more sets of virtual carrier information, subcarrier spacing indication information, group identification information of virtual carrier information, resource allocation range information, and dynamic resource allocation. Indication information, physical carrier indication information.

Step 202: The second communication node receives at least one of the following: the one or more sets of virtual carrier information, the subcarrier spacing indication information, the group identification information of the virtual carrier information, the resource allocation range information, and the dynamic resource allocation. Indication information, physical carrier indication information.

In the embodiment of the present invention, the virtual carrier information includes at least one of the following:

The number of virtual carriers, the bandwidth of the virtual carrier, the virtual carrier index information, the subcarrier spacing used by the virtual carrier, and the number of FFT points used by the virtual carrier.

In the embodiment of the present invention, the subcarrier spacing indication information, or the group identification information of the virtual carrier information, or the group identifier information of the subcarrier spacing indication information and the virtual carrier information, and one of the one or more sets of virtual carrier information. The group virtual carrier information has a binding relationship.

In the embodiment of the present invention, the resource allocation range information includes a size and a location, where the location refers to a relative location relationship between the resource allocation range and each virtual carrier in the group; the resource allocation range may be distributed in one or more On the virtual carrier.

In the embodiment of the present invention, the dynamic resource allocation indication information refers to a time/frequency domain resource occupied by actual data transmission.

In the embodiment of the present invention, the physical carrier indication information refers to at least one of the following: a bandwidth of a physical carrier, a number of physical carriers, physical carrier identification information, and a spectrum resource occupied by a physical carrier.

In the embodiment of the present invention, the judgment result refers to whether there is a DC subcarrier or no DC subcarrier in the actual data transmission.

In the embodiment of the present invention, the different method refers to that when the actual data transmission does not have a DC subcarrier, the second communication node receives all subcarriers in the bandwidth; when the actual data transmission has a DC subcarrier, Receive DC subcarriers, or adjust reception, for example, offset half subcarrier reception.

In the embodiment of the present invention, the second communication node is configured according to the subcarrier spacing indication information, or the group identification information of the virtual carrier information, or the group identifier information of the subcarrier spacing indication information and the virtual carrier information. Or searching for virtual carrier information in multiple sets of virtual carrier information.

A method for indicating a DC subcarrier according to an embodiment of the present invention is described in detail below in conjunction with an application scenario.

Example 1: This example provides a method for indicating a DC subcarrier. As shown in FIG. 9, the flow includes the following steps:

Step 901: The first communications node sends physical carrier indication information, virtual carrier indication information, received bandwidth indication information, subcarrier spacing indication information, and resource allocation indication information to the second communication node.

In the embodiment of the present invention, the virtual carrier indication information includes at least one of the following: the number of virtual carriers, the virtual carrier identification information, the bandwidth of the virtual carrier, the subcarrier spacing used by the virtual carrier, and the fast Fourier transform used by the virtual carrier. The number of FFT points.

For example, the virtual carrier indication information includes at least the number of virtual carriers. As shown in FIG. 3, the number of virtual carriers is 1. As shown in FIG. 4, the number of virtual carriers is 2. As shown in FIG. 5, the number of virtual carriers is 4. FIG. The number of virtual carriers shown is two.

In the embodiment of the present invention, the virtual carrier refers to a subset of the physical carriers.

For example, the virtual carrier may be equivalent to the physical carrier, as shown in FIG. 3, or a part of the physical carrier, as shown in FIG. 4, FIG. 5, and FIG.

In the embodiment of the present invention, the number of virtual carriers and the bandwidth of the virtual carrier are related to at least the bandwidth of the physical carrier, the subcarrier spacing, and the number of FFT points.

For example, as shown in FIG. 3, the physical carrier bandwidth is 80 MHz, the subcarrier is 60 KHz, the FFT point is 2048, the number of virtual carriers is 1, and the bandwidth of each virtual carrier is 80 MHz, and the DC subcarrier is located at the center of each virtual carrier bandwidth; As shown in FIG. 4, the physical carrier bandwidth is 80 MHz, the subcarrier is 30 KHz, the FFT point is 2048, the virtual carrier number is 2, or the physical carrier bandwidth is 80 MHz, the subcarrier is 15 KHz, the FFT point is 4096, and the number of virtual carriers is 2, each virtual carrier bandwidth is 40MHz, the DC subcarrier is located at the center of each virtual carrier bandwidth; as shown in Figure 5, the physical carrier bandwidth is 80MHz, the subcarrier is 15KHz, the FFT point is 2048, and the number of virtual carriers is 4. The bandwidth of each virtual carrier is 20MHz; as shown in Figure 16, the physical carrier bandwidth is 30MHz, the subcarrier is 15KHz, the number of virtual carriers is 2, the FFT point of virtual carrier 1 is 2048, the bandwidth is 20MHz, and the FFT points of virtual carrier 1 are 1024, bandwidth 10MHz, DC subcarriers are located at the center of each virtual carrier bandwidth.

In the embodiment of the present invention, the physical carrier refers to a certain segment or multiple pieces of spectrum resources.

In the embodiment of the present invention, the physical carrier indication information includes at least one of the following: a bandwidth of a physical carrier, a quantity of a physical carrier, physical carrier identification information, and a spectrum resource occupied by a physical carrier.

For example, the physical carrier indication information includes at least a bandwidth of a physical carrier and a spectrum resource occupied by a physical carrier. As shown in FIG. 3, the bandwidth of the physical carrier is 80 MHz, and the frequency band occupied by the material carrier is 30000 MHz to 30080 MHz.

In the embodiment of the present invention, the receiving bandwidth indication information includes at least one of the following: a size of a receiving bandwidth, and location information of a receiving bandwidth.

For example, the receiving bandwidth indication information refers to the size of the receiving bandwidth and the location information of the receiving bandwidth. As shown in FIG. 6, the receiving bandwidth of the second communications node 1 occupies part of the resources of the physical carrier, and corresponds to some resources in the virtual carrier 1. A DC subcarrier exists in the receiving bandwidth of the second communication node 1, and a receiving bandwidth of the second communications node 2 occupies a part of resources of the physical carrier, and corresponds to a part of resources in the virtual carrier 2, where the second communications node 2 There is no DC subcarrier in the receive bandwidth.

In the embodiment of the present invention, the location information of the receiving bandwidth includes at least one of the following: a bandwidth of the receiving bandwidth in the physical carrier, and a positional relationship of the virtual carrier in the bandwidth.

For example, the location information of the receiving bandwidth may be a starting location information and a continuous frequency domain resource information. As shown in FIG. 6, the starting location is a third physical resource block PRB of the physical carrier, and the frequency domain resource information is 10MHz or 25 PRB.

In the embodiment of the present invention, the receiving bandwidth refers to a bandwidth allocated when the second communication node receives data.

In the embodiment of the present invention, the receiving bandwidth depends on the capability of the second communication node.

For example, the subcarrier spacing includes multiple types, for example, 3.75 kHz, 7.5 kHz, 15 kHz, 30 kHz, 60 kHz, 120 kHz, 480 kHz, 960 kHz, and a total of 8 possible subcarrier spacings, which are notified by 3 bits signaling, for example, indicating 011 corresponding subcarrier spacing. It is 30KHz.

In the embodiment of the present invention, the resource allocation indication information refers to a time/frequency domain resource occupied by actual data transmission.

For example, as shown in FIG. 7, there is a DC subcarrier in the time/frequency domain resource occupied by the second communication node 1 during actual data transmission; no DC subcarrier exists in any allocation of the second communication node 2 resource allocation indication information; As shown in FIG. 8, there is no DC subcarrier in the time/frequency domain resource occupied by the second communication node 1 during actual data transmission; no DC subcarrier exists in any allocation of the second communication node 2 resource allocation indication information.

In the embodiment of the present invention, the physical carrier indication information, the virtual carrier indication information, the received bandwidth indication information, the subcarrier spacing indication information, and the resource allocation indication information are carried in a broadcast message, or a system message, or a downlink control message.

For example, the physical carrier indication information, the received bandwidth indication information, and the subcarrier spacing indication information are carried in a system message for transmission; and the resource allocation indication message is carried in a downlink control message for transmission.

In the embodiment of the present invention, the first communication node is a base station, which is referred to as Macro, Micro, Pico, Femto, Remote Radio head (RRH), Relay, Tx/Rx Point (TRP), and GNB (next generation Node B). One or more; the second communication node is one or more of user equipment UE, Relay.

For example, the first type of communication node is Macro and the second type of communication node is UE.

Step 902: The second communication node receives the physical carrier indication information, the virtual carrier indication information, the received bandwidth indication information, the subcarrier spacing indication information, and the resource allocation indication information, determines the location of the DC subcarrier based on the indication information, and determines the actual data transmission. Whether there are DC subcarriers in the middle, and different methods are selected for data reception according to different situations.

In the embodiment of the present invention, the different conditions refer to whether there are DC subcarriers or no DC subcarriers in the actual data transmission.

In the embodiment of the present invention, the different method refers to that when the actual data transmission does not have a DC subcarrier, the second communication node receives all subcarriers in the bandwidth; when the actual data transmission has a DC subcarrier, Receive or adjust the reception.

In the embodiment of the present invention, the second communication node searches for a time/frequency domain resource mapping situation in a resource block grid (RB Grid) according to the subcarrier spacing indication information.

For example, as shown in FIG. 10, the subcarrier spacing is 30 kHz, compared to the subcarrier spacing. The two subframes in the 15KHz time domain are one scheduling unit, and the two RBs in the frequency domain are one scheduling unit compared to the subcarrier spacing of 60KHz.

In the embodiment of the present invention, there is a corresponding relationship between the time/frequency domain resource occupied by the actual data transmission of the resource and the time/frequency domain resource mapping situation.

For example, the resource allocation indication information sent by the first communication node indicates that the resource allocation is performed on the scheduling unit in the time/frequency domain, for example, two consecutive RBs are allocated in the frequency domain.

Example 2: This example provides a method for indicating a DC subcarrier, as shown in FIG. 12, the flow of which includes the following steps:

Step 1201: The first communications node sends physical carrier indication information, virtual carrier indication information, received bandwidth indication information, subcarrier spacing indication information, and resource allocation indication information to the second communication node.

In the embodiment of the present invention, the virtual carrier indication information includes at least one of the following: the number of virtual carriers, the virtual carrier identification information, and the bandwidth of the virtual carrier.

For example, the virtual carrier indication information includes at least the number of virtual carriers. As shown in FIG. 3, the number of virtual carriers is 1. As shown in FIG. 4, the number of virtual carriers is 2. As shown in FIG. 5, the number of virtual carriers is 4. The number of virtual carriers shown in 16 is 2.

For example, as shown in FIG. 3, the physical carrier bandwidth is 80 MHz, the subcarrier is 60 KHz, the FFT point is 2048, the number of virtual carriers is 1, and the bandwidth of each virtual carrier is 80 MHz, and the DC subcarrier is located at the center of each virtual carrier bandwidth; As shown in FIG. 4, the physical carrier bandwidth is 80 MHz, the subcarrier is 30 KHz, the FFT point is 2048, the virtual carrier number is 2, or the physical carrier bandwidth is 80 MHz, the subcarrier is 15 KHz, the FFT point is 4096, and the number of virtual carriers is 2. Each virtual carrier has a bandwidth of 40 MHz, and the DC subcarrier is located at the center of each virtual carrier bandwidth; as shown in FIG. 5, The physical carrier bandwidth is 80MHz, the subcarrier is 15KHz, the FFT point is 2048, the virtual carrier number is 4, and the bandwidth of each virtual carrier is 20MHz. As shown in Figure 16, the physical carrier bandwidth is 30MHz, the subcarrier is 15KHz, and the virtual carrier is The number is 2, the number of FFT points of virtual carrier 1 is 2048, the bandwidth is 20 MHz, the number of FFT points of virtual carrier 1 is 1024, the bandwidth is 10 MHz, and the DC subcarrier is located at the center of each virtual carrier bandwidth.

For example, the physical carrier indication information includes at least a bandwidth of a physical carrier and a spectrum resource occupied by a physical carrier. As shown in FIG. 3, the bandwidth of the physical carrier is 80 MHz, and the frequency band occupied by the material carrier is 70000 MHz to 70080 MHz.

For example, the receiving bandwidth indication information refers to the size of the receiving bandwidth and the location information of the receiving bandwidth. As shown in FIG. 11, the receiving bandwidth of the second communications node occupies part of the resources of the physical carrier, corresponding to the virtual carrier 2 and the virtual carrier 3. For some resources, there are two DC subcarriers in the receiving bandwidth of the second communication node.

For example, the location information of the receiving bandwidth may be a starting location information and a continuous frequency domain resource information. As shown in FIG. 11, the starting location is a certain RB Grid starting position of the physical carrier, and the frequency domain resource information is 20MHz or 25 RB Grid.

For example, the subcarrier spacing includes a plurality of, for example, 3.75KHz, 7.5KHz, 15KHz, 30KHz, 60KHz, 120KHz, 480KHz, 960KHz, a total of 8 possible subcarrier intervals, through 3bits signaling notification, for example, the indication 010 corresponding subcarrier spacing is 15KHz.

For example, as shown in FIG. 11, there are two DC subcarriers in the time/frequency domain resource occupied by the second communication node during actual data transmission.

In the embodiment of the present invention, the physical carrier indication information, the virtual carrier indication information, the received bandwidth indication information, the subcarrier spacing indication information, and the resource allocation indication information are carried in at least one of a broadcast message, a system message, and a downlink control message. Send in the message.

For example, the physical carrier indication information bearer is sent in a broadcast message, and the received bandwidth indication information and the subcarrier spacing indication information are carried in the system message for transmission; the resource allocation indication message is carried in the downlink control message for transmission.

In the embodiment of the present invention, the first communication node is a base station, and refers to one or more of Macro, Micro, Pico, Femto, RRH, Relay, TRP, and GNB; and the second communication node is in the UE and the Relay. One or more.

Step 1202: The second communication node receives the physical carrier indication information, the virtual carrier indication information, the received bandwidth indication information, the subcarrier spacing indication information, and the resource allocation indication information, determines the location of the DC subcarrier based on the foregoing information, and determines the actual data transmission. Whether there is a DC subcarrier, and different methods are selected for data reception according to different situations.

In the embodiment of the present invention, the different method refers to that when the actual data transmission does not have a DC subcarrier, the second communication node receives all subcarriers in the bandwidth; when the actual data transmission has a DC subcarrier, the method does not perform Receive, or make adjustments to receive.

In the embodiment of the present invention, the second communication node searches for the time/frequency domain resource mapping situation in the RB Grid according to the subcarrier spacing indication information.

For example, as shown in FIG. 10, the subcarrier spacing is 15 kHz, compared to the subcarrier spacing. One subframe in the 15KHz time domain is one scheduling unit, and four RBs in the frequency domain are one scheduling unit compared to the subcarrier spacing of 60KHz.

For example, the resource allocation indication information sent by the first communication node indicates that the resource allocation is performed on the scheduling unit in the time/frequency domain, for example, four consecutive RBs are allocated in the frequency domain.

FIG. 13 is a first schematic structural diagram of an apparatus for indicating a DC subcarrier according to an embodiment of the present invention, which is applied to a first communication node, as shown in FIG.

The sending unit 1301 is configured to send one or more sets of virtual carrier information to the second communications node, where the virtual carrier information includes at least one of the following:

In the embodiment of the present invention, the sending unit 1301 is further configured to send, to the second communications node, at least one of the following: subcarrier spacing indication information, group identification information of virtual carrier information;

In the embodiment of the present invention, the sending unit 1301 is further configured to send the intra-group resource allocation range information of the set of virtual carrier information in the binding relationship to the second communication node, where the intra-group resource allocation range information A size and a location are included, wherein the location refers to a relative location relationship between the resource allocation range and each virtual carrier within the group; the resource allocation range is distributed over one or more of the virtual carriers.

In the embodiment of the present invention, the sending unit 1301 is further configured to send dynamic resource allocation indication information to the second communication node, where the dynamic resource allocation indication information refers to a time/frequency domain resource occupied by the actual data transmission.

In the embodiment of the present invention, the sending unit 1301 is further configured to send the physical carrier indication information to the second communications node, where the physical carrier indication information refers to at least one of the following: a bandwidth of the physical carrier, a quantity of the physical carrier, and a physical carrier identifier. Information, spectrum resources occupied by physical carriers.

It should be understood by those skilled in the art that the implementation function of each unit in the apparatus for indicating a DC subcarrier shown in FIG. 13 can be understood by referring to the related description of the foregoing method for indicating a DC subcarrier. The function of each unit in the apparatus for indicating a DC subcarrier shown in FIG. 13 can be realized by a program running on a processor, or can be realized by a logic circuit.

FIG. 14 is a schematic structural diagram of a device for indicating a DC subcarrier according to an embodiment of the present invention. The method is applied to a second communication node. As shown in FIG. 14, the device includes:

The receiving unit 1401 is configured to receive at least one of the following: the first communication node sends: Or multiple sets of virtual carrier information, subcarrier spacing indication information, group identification information of virtual carrier information, resource allocation range information, dynamic resource allocation indication information, physical carrier indication information; the received message determines the location of the DC subcarrier, and simultaneously determines Whether there is a DC subcarrier in the actual data transmission, and different methods are selected according to the judgment result for data reception.

In the embodiment of the present invention, the subcarrier spacing used by the virtual carrier in the multiple sets of virtual carrier information has a 2 ⁿ multiple relationship with each other, where n is an integer.

In the embodiment of the present invention, the different method refers to that when the actual data transmission does not have a DC subcarrier, the second communication node receives all subcarriers in the bandwidth; when the actual data transmission has a DC subcarrier, Receive DC subcarriers or adjust reception.

It should be understood by those skilled in the art that the implementation function of each unit in the apparatus for indicating a DC subcarrier shown in FIG. 14 can be understood by referring to the related description of the foregoing method for indicating a DC subcarrier. The function of each unit in the apparatus for indicating a DC subcarrier shown in FIG. 14 can be realized by a program running on a processor, or can be realized by a logic circuit.

15 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. As shown in FIG. 15, the electronic device includes a processor 1501 and a memory 1502 storing instructions executable by the processor 1501, when the instruction is processed. When the device 1501 is executed,

In the first embodiment, the processor 1501 performs the following steps: transmitting one or more sets of virtual carrier information to the second communication node, where the virtual carrier information includes at least one of the following: the number of virtual carriers, and the virtual Carrier bandwidth, virtual carrier index information, subcarrier spacing used by the virtual carrier, and fast Fourier transform FFT points used by the virtual carrier.

In the second embodiment, the processor 1501 performs the following steps: receiving at least one of the following ones: one or more sets of virtual carrier information, subcarrier spacing indication information, and group identification information of virtual carrier information. The resource allocation range information, the dynamic resource allocation indication information, and the physical carrier indication information; the received message determines the location of the DC subcarrier, and determines whether there is a DC subcarrier in the actual data transmission, and selects different methods according to the judgment result to perform data. receive.

Those skilled in the art will appreciate that the electronic device illustrated in Figure 15 is capable of performing the method steps of indicating a DC subcarrier in any embodiment of the present invention.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and functional blocks/units of the methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical The components work together. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer readable medium, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules or other data. Sex, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer. Moreover, it is well known to those skilled in the art that communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media. .

The above description is only for the exemplary embodiments of the present disclosure, and is not intended to limit the scope of the disclosure.

Industrial applicability

In the solution of the embodiment of the present invention, the first communications node sends one or more sets of virtual carrier information to the second communications node, where the virtual carrier information includes at least one of the following: a virtual carrier The number, the bandwidth of the virtual carrier, the virtual carrier index information, the subcarrier spacing used by the virtual carrier, and the fast Fourier transform FFT points used by the virtual carrier. The second communication node receives at least one of the following ones: one or more sets of virtual carrier information, subcarrier spacing indication information, group identification information of virtual carrier information, resource allocation range information, dynamic resource allocation indication information, The physical carrier indicates information; the second communication node determines the location of the DC subcarrier based on the received message, and determines whether there is a DC subcarrier in the actual data transmission, and selects a different method for data reception according to the judgment result. The solution of the embodiment of the present invention enables the receiving end to know whether there is a DC subcarrier in the receiving bandwidth, thereby obtaining a corresponding data receiving method, ensuring correct data reception, and effectively reducing signaling overhead, and more flexibly adapting to the 5G NR. Different requirements of the scene. Therefore, the present invention has industrial applicability.

Claims

A method for indicating a DC DC subcarrier includes:

The first communication node sends one or more sets of virtual carrier information to the second communication node, where the virtual carrier information includes at least one of the following: the number of virtual carriers, the bandwidth of the virtual carrier, the virtual carrier index information, and the virtual carrier usage. The subcarrier spacing, the fast Fourier transform FFT points used by the virtual carrier (101).
The method of claim 1 wherein the method further comprises:

The first communication node sends at least one of the following: subcarrier spacing indication information, group identification information of virtual carrier information to the second communication node;

The subcarrier spacing indication information, or the group identification information of the virtual carrier information, or the subcarrier spacing indication information and the group identification information of the virtual carrier information, and the one or more sets of virtual carriers. A set of virtual carrier information in the information has a binding relationship.
The method of claim 2, wherein the method further comprises:

The first communication node sends the intra-group resource allocation range information of the set of virtual carrier information in the binding relationship to the second communication node, where the intra-group resource allocation range information includes a size and a location, where the location refers to a relative positional relationship between the resource allocation range and a virtual carrier in the group; the resource allocation range is distributed on one or more of the virtual carriers.
The method of claim 1 wherein the method further comprises:

The first communication node sends dynamic resource allocation indication information to the second communication node, where the dynamic resource allocation indication information refers to a time/frequency domain resource occupied by the actual data transmission.
The method of claim 1 wherein the method further comprises:

The first communication node sends the physical carrier indication information to the second communication node, where the physical carrier indication information refers to at least one of the following: a bandwidth of the physical carrier, a quantity of the physical carrier, physical carrier identification information, and a spectrum resource occupied by the physical carrier.
The method according to any one of claims 1 to 5, wherein the first communication node indicates whether the current resource allocation of the second communication node includes one or more virtual carriers based on information transmitted to the second communication node. DC subcarrier.
The method of claim 6, wherein if the current resource allocation of the second communication node includes a DC subcarrier of a virtual carrier, the first communication node performs rate matching, and accordingly, a DC subcarrier of the virtual carrier Do not map data.
The method of claim 5, wherein the virtual carrier index information has a corresponding relationship with a location of the physical carrier.
The method according to claim 5 or 7, wherein the number of virtual carriers and the bandwidth of the virtual carrier are related to at least the bandwidth of the physical carrier, the subcarrier spacing of the virtual carrier, and the number of FFT points.
The method of claim 2, wherein the resource allocation range information is determined based on capabilities reported by the second communication node, the capabilities including supported FFT points, or supported bandwidth, or supported FFT points and Supported bandwidth.
The method according to claim 1, wherein the subcarrier spacings used by the virtual carriers in the plurality of sets of virtual carrier information have a 2 n multiple relationship with each other, wherein n is an integer.
The method of claim 2, wherein the subcarrier spacing indication information refers to a subcarrier spacing used when the second communication node receives data.
The method according to claim 5, wherein the one or more sets of virtual carrier information, subcarrier spacing indication information, group identification information of virtual carrier information, resource allocation range information, dynamic resource allocation indication information, physical carrier indication The information is sent in at least one of the following messages: a broadcast message, a system message, and a downlink control message.
A method for indicating a DC DC subcarrier includes:

The second communication node receives at least one of the following ones: one or more sets of virtual carrier information, subcarrier spacing indication information, group identification information of virtual carrier information, resource allocation range information, dynamic resource allocation indication information, Physical carrier indication information (201);

The second communication node determines the location of the DC subcarrier based on the received message, and determines whether there is a DC subcarrier in the actual data transmission, and selects a different manner to perform data reception according to the judgment result (202).
The method of claim 14, wherein the virtual carrier information comprises at least one of the following:

The number of virtual carriers, the bandwidth of the virtual carrier, the virtual carrier index information, the subcarrier spacing used by the virtual carrier, and the number of FFT points used by the virtual carrier.
The method according to claim 14, wherein the subcarrier spacing indication information, or group identification information of virtual carrier information, or group identification information of subcarrier spacing indication information and virtual carrier information, and the one or more sets of virtual A set of virtual carrier information in the carrier information has a binding relationship.
The method according to claim 14, wherein the resource allocation range information comprises a size and a location, wherein the location refers to a relative positional relationship between the resource allocation range and a virtual carrier within the group; the resource allocation range is distributed in one or On a plurality of said virtual carriers.
The method according to claim 14, wherein the dynamic resource allocation indication information refers to a time/frequency domain resource occupied when actual data is transmitted.
The method according to claim 14, wherein the physical carrier indication information refers to at least one of: a bandwidth of a physical carrier, a number of physical carriers, physical carrier identification information, and a spectrum resource occupied by a physical carrier.
The method according to claim 15 or 18, wherein the virtual carrier index information has a corresponding relationship with a location of the physical carrier.
The method of claim 14, 18 or 19, wherein the number of virtual carriers and the bandwidth of the virtual carrier are related to at least a bandwidth of the physical carrier, a subcarrier spacing of the virtual carrier, and a number of FFT points.
The method of claim 17, wherein the resource allocation range information is determined based on capabilities reported by the second communication node, the capabilities including supported FFT points, or supported bandwidth, or supported FFT points and Supported bandwidth.
The method according to claim 14 or 15, wherein the subcarrier spacings used by the virtual carriers in the plurality of sets of virtual carrier information have a 2 n multiple relationship with each other, wherein n is an integer.
The method of claim 17, wherein the subcarrier spacing indication information refers to a subcarrier spacing used when the second communication node receives data.
The method according to claim 18, wherein the one or more sets of virtual carrier information, subcarrier spacing indication information, group identification information of virtual carrier information, resource allocation range information, The dynamic resource allocation indication information and the physical carrier indication information are sent in at least one of the following messages: a broadcast message, a system message, and a downlink control message.
The method of claim 14, wherein the result of the judgment refers to a DC subcarrier or no DC subcarrier in the actual data transmission.
The method according to claim 14 or 27, wherein said different manner means that when there is no DC subcarrier in said actual data transmission, said second communication node receives all subcarriers on the bandwidth; said actual data transmission When there is a DC subcarrier, the DC subcarrier is not received, or adjustment reception is performed.
The method according to claim 14 or 16, wherein the second communication node according to the subcarrier spacing indication information, or group identification information of the virtual carrier information, or the subcarrier spacing indication information and the The group identification information of the virtual carrier information, and the virtual carrier information is searched for in one or more sets of virtual carrier information.
A device for indicating a DC DC subcarrier is applied to a first communication node, the device comprising:

The sending unit (1301) is configured to send one or more sets of virtual carrier information to the second communications node, where the virtual carrier information includes at least one of the following:

The number of virtual carriers, the bandwidth of the virtual carrier, the virtual carrier index information, the subcarrier spacing used by the virtual carrier, and the number of fast Fourier transform FFT points used by the virtual carrier.
An apparatus for indicating a DC subcarrier is applied to a second communication node, the apparatus comprising:

The receiving unit (1401) is configured to receive at least one of the following: the one or more sets of virtual carrier information, the subcarrier spacing indication information, the group identification information of the virtual carrier information, the resource allocation range information, and the dynamic resource. The indication information and the physical carrier indication information are allocated; the received message determines the location of the DC subcarrier, and determines whether there is a DC subcarrier in the actual data transmission, and selects a different manner to perform data reception according to the judgment result.
An electronic device comprising a processor (1501) and a memory (1502) storing instructions executable by the processor (1501), wherein when the instructions are executed by the processor (1501), the processor ( 1501) Performing the method steps of indicating a DC subcarrier according to any of claims 1-13.
An electronic device comprising a processor (1501) and a memory (1502) storing instructions executable by the processor (1501), wherein when the instructions are executed by the processor (1501), the processor ( 1501) A method step of indicating a DC subcarrier according to any one of claims 14-28.