CN109391402B

CN109391402B - Transmission method of downlink control information, base station, terminal and storage medium

Info

Publication number: CN109391402B
Application number: CN201710681983.3A
Authority: CN
Inventors: 郭保娟; 苏昕
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2017-08-10
Filing date: 2017-08-10
Publication date: 2021-02-12
Anticipated expiration: 2037-08-10
Also published as: CN109391402A

Abstract

The invention provides a transmission method of downlink control information, a base station, a terminal and a computer readable storage medium, wherein the transmission method of the downlink control information comprises the following steps: determining the total port number of the MIMO multiplexing to be indicated according to the demodulation reference signal configuration information; obtaining downlink control information according to the total port number, and sending the downlink control information to the terminal; the number of the total port number is smaller than the number of the candidate values of the total port number corresponding to the demodulation reference signal configuration information. The scheme can ensure the correct transmission of the demodulation reference signal for channel estimation when a plurality of data streams are transmitted simultaneously in the MIMO of a large-scale antenna system, and solves the problem that the terminal cannot be informed of DMRS pilot pattern information applied to different time-frequency resources in the prior art when MU-MIMO is performed, so that DCI information cannot be transmitted normally; and the port number signaling can be notified by using a small number of bits under a new air interface, so that system resources are saved.

Description

Transmission method of downlink control information, base station, terminal and storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, a base station, a terminal, and a computer-readable storage medium for transmitting downlink control information.

Background

In the LTE system, a user may perform channel estimation through a dedicated DMRS (DeModulation Reference Signal), which performs the same precoding operation as a data Signal. The above release of LTE Rel-10 can support 8 Orthogonal DMRS ports — ports 7 to 14, in Code division (using Orthogonal Cover Code, OCC-Orthogonal Code) or frequency division, as shown in fig. 1 (l in fig. 1 denotes the symbol index of each slot in the LTE subframe structure, 7 symbols per slot, from 0-6); the

ports

7,8, 11, 13 multiplex the same RE (Resource Element) on a group of subcarriers, and are distinguished by OCC;

ports

9,10, 12, 14 multiplex the same REs on another set of subcarriers, also distinguished by OCC.

In order to realize transparent transmission and save the overhead of time-frequency Resources (REs) occupied by DMRSs, the MU-MIMO (Multi-User Multiple-Input Multiple-Output) transmission mode in LTE Rel-10 only uses

ports

7 and 8, that is, only 2 DMRSs orthogonal through OCC are used, and at the same time, the DMRSs can be distinguished in a quasi-orthogonal (same precoding/beamforming as a data channel and different DMRS scrambling sequences) manner and allocated to Multiple data streams. The OCC length is 2 when only

ports

7,8 are present. Downlink Control Information (DCI) includes DMRS ports allocated to users and nSCID (scrambling identity) indication describing DMRS scrambling sequences. In the discussion of Full-dimensional MIMO (FD-MIMO), which is a prior art of large-scale antennas in the 3GPP standard, an extension method of DMRS is proposed to support increasing a certain number of users, for example,

ports

7,8, 11, and 13 are used, the OCC length is 4, and the number of orthogonal DMRSs is increased.

However, in the LTE system, regardless of how the number of DMRS orthogonal ports is increased, the DMRS pilot pattern is fixed, and as long as the user knows the port resources allocated to the user, information detection and demodulation can be performed based on the fixed DMRS pilot pattern.

In addition, after a 5G New air interface (NR) item is started, in order to reduce processing delay and improve system performance, the DMRS pilot pattern is designed and defined again. In the new DMRS pilot pattern, there are multiple different pilot patterns, and the specific configuration is as follows:

configuration 1:

DMRS symbol number 1 with comb2+ CS2, maximum support to 4 ports.

(1) See fig. 2, where comb2 is frequency domain multiplexing, such as the multiplexing relationship between

ports

0 and 2 is comb 2. CS2 multiplexes sequences between ports by cyclic shifts, for example, the multiplexing relationship between

ports

0 and 1 is CS 2.

DMRS symbol number 2 with comb2+ CS2+ TD-OCC ({ 11} and {1-1}), maximum support to 8 ports.

(2) Referring to fig. 3, the TD-OCC is time domain OCC (Orthogonal Code) multiplexing, for example, time domain OCC multiplexing is adopted between ports 0/1 and 4/5.

Configuration 2

The number of DMRS symbols is 1, 2-FD-OCC (adjacent frequency domain RE) is adopted, and maximum support is carried out to 6 ports.

(1) See fig. 4,2-FD-OCC, i.e., frequency domain OCC multiplexing, e.g., between

ports

0 and 1. In addition, FDM (Frequency Division Multiplexing) is adopted between the ports, for example, FDM is adopted between the ports 0/1 and 2/3.

DMRS symbol number 2 with 2-FD-OCC (adjacent frequency domain RE) + TD-OCC ({ 11} and {1-1}), maximum support to 12 ports.

(1) Referring to fig. 5, TD-OCC is time domain OCC (orthogonal Cover code) multiplexing, for example, time domain OCC multiplexing is adopted between ports 0/1 and 6/7.

As can be seen from the above-mentioned various patterns of DMRSs, the configuration1 may be configured by using the pattern of fig. 2 if the maximum number of supported ports is not more than 4, or may be configured by using the pattern of fig. 3 if the maximum number of supported ports is more than 4 but not more than 8; in the case of configuration2, if the maximum number of supported ports does not exceed 6, it may be configured with the pattern of fig. 4, and if it exceeds 6, but does not exceed 12, it may be configured with the pattern of fig. 5. The port number here is the sum of the port numbers of all the users multiplexed on the resource location.

Further, in NR, it has been basically confirmed that the content of DCI information that needs to be included is as follows:

(1) resource information: carrier information and time-frequency resource allocation are included;

(2) MCS (Modulation and Coding Scheme) information;

(3) HARQ (Hybrid Automatic Repeat reQuest) related information: including new data indication, RV (Redundancy Version), HARQ process, etc.;

(4) PUCCH (Physical Uplink Control CHannel) related information: contains power and resource information;

(5) multi-antenna related information: including antenna port, scrambling code ID, layer number, etc.;

(6) CSI (Channel State Information) related Information: the method comprises a CSI measurement reporting mechanism;

(7) SRS (Sounding Reference Signal) related information;

(8) RNTI (Radio Network temporary Identity).

The multi-antenna information contains the content required by the DMRS configuration, and is not determined at present. For the determined patterns with various configurations of the DMRS, in MU-MIMO, the number of multiplexed users is different on different time-frequency resources, so that the number of DMRS ports multiplexed simultaneously on different resources is different, and different port numbers may use different DMRS pilot patterns according to the existing DMRS configuration information. In order to notify the terminal of DMRS pilot pattern information applied to different time-frequency resources, a multi-antenna configuration information is needed, which is included in DCI information and is notified to the terminal UE.

Disclosure of Invention

The invention aims to provide a transmission method of downlink control information, a base station, a terminal and a computer readable storage medium, which solve the problem that in the prior art, when MU-MIMO is carried out, DMRS pilot pattern information applied to different time frequency resources cannot be notified to the terminal, so that DCI information cannot be normally transmitted.

In order to solve the foregoing technical problem, an embodiment of the present invention provides a method for transmitting downlink control information, including:

determining the total port number of the MIMO multiplexing to be indicated according to the demodulation reference signal configuration information;

obtaining downlink control information according to the total port number, and sending the downlink control information to the terminal;

the number of the total port number is smaller than the number of the candidate values of the total port number corresponding to the demodulation reference signal configuration information.

Optionally, the step of determining the total number of mimo multiplexed ports to be indicated according to the demodulation reference signal configuration information includes:

determining a set of candidate values of the total port number according to the demodulation reference signal configuration information;

and selecting the odd port number or the even port number from the candidate value set as the total port number of the MIMO multiplexing to be indicated.

Optionally, the step of selecting an odd port number or an even port number from the set of candidate values as a total port number of the mimo multiplexing to be indicated includes:

selecting the number of odd ports or the number of even ports from the candidate value set to obtain an initial set;

and reducing the initial set to obtain the total number of the MIMO multiplexed ports to be indicated.

determining the number of symbols occupied by the demodulation reference signal according to the demodulation reference signal configuration information;

and determining the total port number of the MIMO multiplexing to be indicated according to the symbol number.

Optionally, the step of determining, according to the number of symbols, a total number of ports of the mimo multiplexing to be indicated includes:

determining an initial candidate value set of the total port number according to the symbol number;

and expanding the initial candidate value set to obtain the total port number of the MIMO multiplexing to be indicated.

Optionally, the step of obtaining downlink control information according to the total number of ports and sending the downlink control information to the terminal includes:

determining an indication bit corresponding to the total port number according to the total port number and a mapping relation between the total port number and the indication bit;

and obtaining downlink control information according to the indication bit and sending the downlink control information to the terminal.

and obtaining downlink control information according to the total port number, and sending the downlink control information to the terminal through a high-level signaling or a special physical downlink control channel corresponding to the terminal.

Optionally, when the number of the transmission points is multiple, the step of determining the total number of the mimo multiplexing ports to be indicated according to the demodulation reference signal configuration information includes:

determining the total port number corresponding to each transmission point according to the demodulation reference signal configuration information corresponding to each transmission point;

and determining the total port number of the MIMO multiplexing to be indicated according to the total port number corresponding to each transmission point.

obtaining downlink control information according to the total port number;

determining a reserved signaling bit length according to the number of divided scheduling resources;

sending the downlink control information to a terminal according to the reserved signaling bit length;

and the scheduling resource is a time-frequency resource allocated to the terminal by the base station.

Optionally, before determining the reserved signaling bit length according to the number of parts of the scheduling resource, the transmission method further includes:

and determining the divided parts of the scheduling resources according to a preset rule and a scheduling resource part configuration value.

and determining the divided parts of the scheduling resources according to the configuration value of the parts of the scheduling resources and the length of the signaling bit occupied by the downlink control information.

Optionally, after determining the reserved signaling bit length according to the number of parts of the scheduling resource that is divided, the transmission method further includes:

and sending the divided parts of the scheduling resources to a terminal by adopting a preset bit signaling.

The embodiment of the invention also provides a method for transmitting the downlink control information, which comprises the following steps:

receiving downlink control information sent by a base station;

obtaining the total port number of the MIMO multiplexing according to the downlink control information, and receiving data for demodulation;

and the obtained number of the total ports is smaller than the number of the candidate values of the total ports corresponding to the demodulation reference signal configuration information in the downlink control information.

Optionally, the step of obtaining a total number of mimo multiplexed ports according to the downlink control information, and receiving data for demodulation includes:

acquiring an indication bit in the downlink control information;

determining the total port number of the multiple input multiple output multiplexing corresponding to the indication bit according to the indication bit and the mapping relation between the total port number and the indication bit;

and according to the determined total port number, receiving data and demodulating.

Optionally, the step of receiving data and demodulating according to the determined total port number includes:

performing blind detection according to the determined total port number to obtain a first actual multiplexing port number;

and receiving data for demodulation according to the number of the first actual multiplexing ports.

obtaining the total port number of the MIMO multiplexing according to the downlink control information;

performing blind detection according to the total port number to obtain a second actual multiplexing port number;

and receiving data for demodulation according to the number of the second actual multiplexing ports.

determining the signaling bit length occupied by the downlink control information according to the divided number of scheduling resources;

obtaining the total port number of the multiple input multiple output multiplexing according to the occupied signaling bit length and the downlink control information, and receiving data for demodulation;

Optionally, before determining the length of the signaling bit occupied by the downlink control information according to the divided number of scheduling resources, the transmission method further includes:

and receiving the divided parts of the scheduling resources sent by the base station by adopting the preset bit signaling.

The embodiment of the present invention further provides a device for transmitting downlink control information, including:

the first determining module is used for determining the total port number of the MIMO multiplexing to be indicated according to the demodulation reference signal configuration information;

the first processing module is used for obtaining downlink control information according to the total port number and sending the downlink control information to the terminal;

Optionally, the first determining module includes:

the first determining submodule is used for determining a set of candidate values of the total port number according to the demodulation reference signal configuration information;

and the first processing submodule is used for selecting the odd port number or the even port number from the candidate value set as the total port number of the MIMO multiplexing to be indicated.

Optionally, the first processing sub-module includes:

the first processing unit is used for selecting the number of odd ports or the number of even ports from the candidate value set to obtain an initial set;

Optionally, the first determining module includes:

the second determining submodule is used for determining the number of symbols occupied by the demodulation reference signal according to the demodulation reference signal configuration information;

Optionally, the second determining sub-module includes:

a first determining unit, configured to determine an initial candidate value set of a total port number according to the symbol number;

and the second processing unit is used for performing expansion processing on the initial candidate value set to obtain the total port number of the MIMO multiplexing to be indicated.

Optionally, the first processing module includes:

a third determining submodule, configured to determine, according to the total port number and a mapping relationship between the total port number and an indication bit, an indication bit corresponding to the total port number;

and the second processing submodule is used for obtaining the downlink control information according to the indication bit and sending the downlink control information to the terminal.

Optionally, the first processing module includes:

and the third processing submodule is used for obtaining downlink control information according to the total port number and sending the downlink control information to the terminal through a high-level signaling or a special physical downlink control channel corresponding to the terminal.

Optionally, when the number of transmission points is multiple, the first determining module includes:

the fourth determining submodule is used for determining the total port number corresponding to each transmission point according to the demodulation reference signal configuration information corresponding to each transmission point;

Optionally, the first processing module includes:

the fourth processing submodule is used for obtaining downlink control information according to the total port number;

Optionally, the transmission device further includes:

and the second determining module is used for determining the divided parts of the scheduling resources according to the preset rule and the configuration value of the parts of the scheduling resources before determining the length of the reserved signaling bit according to the divided parts of the scheduling resources.

Optionally, the transmission device further includes:

and a third determining module, configured to determine the number of divided scheduling resources according to the configuration value of the number of scheduling resources and the length of signaling bits required to be occupied by the downlink control information before determining the length of reserved signaling bits according to the number of divided scheduling resources.

Optionally, the transmission device further includes:

and the first sending module is used for sending the divided parts of the scheduling resources to the terminal by adopting a preset bit signaling after determining the bit length of the reserved signaling according to the divided parts of the scheduling resources.

a first receiving module, configured to receive downlink control information sent by a base station;

the second processing module is used for obtaining the total port number of the multiple input multiple output multiplexing according to the downlink control information, receiving data and demodulating the data;

Optionally, the second processing module includes:

a first obtaining submodule, configured to obtain an indicator bit in the downlink control information;

a fifth determining submodule, configured to determine, according to the indication bit and a mapping relationship between a total port number and the indication bit, a total port number of the mimo multiplexing corresponding to the indication bit;

and the fifth processing submodule is used for receiving the data and demodulating according to the determined total port number.

Optionally, the fifth processing sub-module includes:

the third processing unit is used for performing blind detection according to the determined total port number to obtain a first actual multiplexing port number;

Optionally, the second processing module includes:

a sixth processing submodule, configured to obtain a total number of multiple-input multiple-output multiplexed ports according to the downlink control information;

Optionally, the second processing module includes:

a seventh processing submodule, configured to determine, according to the number of divided scheduling resources, a signaling bit length occupied by the downlink control information;

Optionally, the transmission device further includes:

and a fourth determining module, configured to determine the number of divided scheduling resources according to a preset rule and a scheduling resource number configuration value before determining the signaling bit length occupied by the downlink control information according to the number of divided scheduling resources.

Optionally, the transmission device further includes:

and a second receiving module, configured to receive the divided number of parts of the scheduling resource sent by the base station by using a preset bit signaling before determining the signaling bit length occupied by the downlink control information according to the divided number of parts of the scheduling resource.

The embodiment of the invention also provides a base station, which comprises a memory, a processor, a transceiver and a computer program which is stored on the memory and can run on the processor; the processor implements the following steps when executing the program:

The embodiment of the invention also provides a terminal, which comprises a memory, a processor, a transceiver and a computer program which is stored on the memory and can run on the processor; the processor implements the following steps when executing the program:

receiving downlink control information sent by a base station;

An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the following steps:

receiving downlink control information sent by a base station;

The technical scheme of the invention has the following beneficial effects:

in the above scheme, the transmission method of the downlink control information determines the total number of the mimo multiplexing ports to be indicated according to the demodulation reference signal configuration information; obtaining downlink control information according to the total port number, and sending the downlink control information to the terminal; and the number of the total port number is smaller than the number of the candidate values of the total port number corresponding to the demodulation reference signal configuration information; the method can ensure the correct transmission of DeModulation Reference signals (DMRS) for channel estimation when a plurality of data streams are transmitted simultaneously in the MIMO of a large-scale antenna system, and solves the problem that the terminal cannot be informed of DMRS pilot pattern information applied to different time-frequency resources during MU-MIMO in the prior art, so that DCI information cannot be transmitted normally; and the port number signaling can be notified by using a small number of bits under a new air interface, so that system resources are saved.

Drawings

Fig. 1 is a schematic diagram of DRMS resources of a normal cyclic prefix downlink subframe in the prior art;

fig. 2 shows a first configuration mode of a demodulation reference signal in the prior art;

fig. 3 shows a second configuration mode of a demodulation reference signal in the prior art;

fig. 4 shows a third configuration mode of a demodulation reference signal in the prior art;

fig. 5 shows a fourth configuration mode of a demodulation reference signal in the prior art;

fig. 6 is a first flowchart illustrating a method for transmitting downlink control information according to an embodiment of the present invention;

fig. 7 is a flowchart illustrating a second method for transmitting downlink control information according to an embodiment of the present invention;

fig. 8 is a first schematic structural diagram of a transmission apparatus for downlink control information according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a transmission apparatus of downlink control information according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

The present invention provides a method for transmitting downlink control information, which can be applied to a base station side, as shown in fig. 6, and includes:

step 61: determining the total port number of the MIMO multiplexing to be indicated according to the demodulation reference signal configuration information;

step 62: obtaining downlink control information according to the total port number, and sending the downlink control information to the terminal;

the number of the total number of ports is smaller than the number of candidate values (possible values) of the total number of ports corresponding to the demodulation reference signal configuration information.

The transmission method of the downlink control information provided by the embodiment of the invention determines the total port number of the MIMO multiplexing to be indicated according to the demodulation reference signal configuration information; obtaining downlink control information according to the total port number, and sending the downlink control information to the terminal; and the number of the total port number is smaller than the number of the candidate values of the total port number corresponding to the demodulation reference signal configuration information; the method can ensure the correct transmission of DeModulation Reference signals (DMRS) for channel estimation when a plurality of data streams are transmitted simultaneously in the MIMO of a large-scale antenna system, and solves the problem that the terminal cannot be informed of DMRS pilot pattern information applied to different time-frequency resources during MU-MIMO in the prior art, so that DCI information cannot be transmitted normally; and the port number signaling can be notified by using a small number of bits under a new air interface, so that system resources are saved.

Two specific examples are provided in the embodiment of the present invention for determining the total number of ports of mimo multiplexing to be indicated according to demodulation reference signal configuration information:

the first step, the determining the total number of ports of the mimo multiplexing to be indicated according to the demodulation reference signal configuration information includes: determining a set of candidate values of the total port number according to the demodulation reference signal configuration information; and selecting the odd port number or the even port number from the candidate value set as the total port number of the MIMO multiplexing to be indicated.

In order to save resources, the step of selecting an odd port number or an even port number from the set of candidate values as a total port number of the mimo multiplexing to be indicated includes: selecting the number of odd ports or the number of even ports from the candidate value set to obtain an initial set; and reducing the initial set to obtain the total number of the MIMO multiplexed ports to be indicated.

The reduction process may be to remove some elements in the initial set according to a predetermined rule, for example, the initial set is {2,4,6,8,10,12}, and the reduction process is {2,4,6,8 }.

Secondly, the step of determining the total number of the ports of the mimo multiplexing to be indicated according to the demodulation reference signal configuration information includes: determining the number of symbols occupied by the demodulation reference signal according to the demodulation reference signal configuration information; and determining the total port number of the MIMO multiplexing to be indicated according to the symbol number.

In order to ensure a certain accuracy, the step of determining the total number of ports of the mimo multiplexing to be indicated according to the number of symbols includes: determining an initial candidate value (possible value) set of the total port number according to the symbol number; and expanding the initial candidate value set to obtain the total port number of the MIMO multiplexing to be indicated.

The expansion process may be to add some elements to the initial candidate value set according to a predetermined rule, for example, the initial candidate value set is {2,4}, and the expansion process is then {2,4,6,8 }.

Specifically, the step of obtaining downlink control information according to the total port number and sending the downlink control information to the terminal includes: determining an indication bit corresponding to the total port number according to the total port number and a mapping relation between the total port number and the indication bit; and obtaining downlink control information according to the indication bit and sending the downlink control information to the terminal.

In this embodiment, the step of obtaining downlink control information according to the total number of ports and sending the downlink control information to the terminal includes: and obtaining downlink control information according to the total port number, and sending the downlink control information to the terminal through a high-level signaling or a special physical downlink control channel corresponding to the terminal.

Further, when the number of the transmission points is multiple, the step of determining the total number of the mimo multiplexing ports to be indicated according to the demodulation reference signal configuration information includes: determining the total port number corresponding to each transmission point according to the demodulation reference signal configuration information corresponding to each transmission point; and determining the total port number of the MIMO multiplexing to be indicated according to the total port number corresponding to each transmission point.

All the manners involved in the present embodiment can be applied to determine the total port number of the mimo multiplexing corresponding to each of the plurality of transmission points, and will not be described in detail herein.

In view of the fact that the number of the ports multiplexed on different scheduling resources may be different, in this embodiment, the step of obtaining the downlink control information according to the total number of the ports and sending the downlink control information to the terminal includes: obtaining downlink control information according to the total port number; determining a reserved signaling bit length according to the number of divided scheduling resources; sending the downlink control information to a terminal according to the reserved signaling bit length; and the scheduling resource is a time-frequency resource allocated to the terminal by the base station.

It can also be understood that the length of the signaling bit required for transmitting each port number by the total scheduling resource is determined to ensure the normal transmission of each port number.

Regarding determining the reserved signaling bit length, two specific examples are provided in this embodiment:

first, the step of determining the reserved signaling bit length according to the number of divided scheduling resources comprises: determining the divided parts of the scheduling resources according to a preset rule and a scheduling resource part configuration value; the reserved signaling bit length is determined according to the number of divided scheduling resources.

I.e. how to determine the reserved signalling bit length is agreed in advance with the terminal. The preset rule may be any rule for selecting the target value in the configuration value of the number of scheduling resource shares as the number of the divided scheduling resources, and how to select the target value with a larger value.

It can also be understood that, before determining the reserved signaling bit length according to the number of parts of the scheduling resource, the transmission method further includes: and determining the divided parts of the scheduling resources according to a preset rule and a scheduling resource part configuration value.

Secondly, the step of determining the reserved signaling bit length according to the divided number of the scheduling resources comprises: determining the divided parts of the scheduling resources according to the configuration value of the parts of the scheduling resources and the length of the signaling bit occupied by the downlink control information; the reserved signaling bit length is determined according to the number of divided scheduling resources.

It can also be understood that, before determining the reserved signaling bit length according to the number of parts of the scheduling resource, the transmission method further includes: and determining the divided parts of the scheduling resources according to the configuration value of the parts of the scheduling resources and the length of the signaling bit occupied by the downlink control information.

Further, after determining the reserved signaling bit length according to the number of parts of the scheduling resource, the transmission method further includes: and sending the divided parts of the scheduling resources to a terminal by adopting a preset bit signaling.

The base station directly informs the terminal of the reserved signaling bit length after selecting the reserved signaling bit length. The terminal can know the number of divided scheduling resources, and also can know the bit length (which may be predetermined by the base station and the terminal) required by the preset bit signaling. The signaling bit length actually reserved by the base station, which is occupied by the downlink control information, also includes the signaling bit length occupied by the preset bit signaling.

As can be seen from the above, the method for transmitting downlink control information according to the embodiment of the present invention well solves the problem in the prior art that when performing MU-MIMO, a terminal cannot be notified of DMRS pilot pattern information applied to different time-frequency resources, so that DCI information cannot be normally transmitted.

An embodiment of the present invention further provides a method for transmitting downlink control information, which can be applied to a terminal side, as shown in fig. 7, and includes:

step 71: receiving downlink control information sent by a base station;

step 72: obtaining the total port number of the MIMO multiplexing according to the downlink control information, and receiving data for demodulation;

The embodiment of the invention provides a transmission method of the downlink control information, which receives the downlink control information sent by a base station; obtaining the total port number of the MIMO multiplexing according to the downlink control information, and receiving data for demodulation; the method and the device can ensure correct transmission of DeModulation Reference signals (DMRS) for channel estimation when multiple data streams are transmitted simultaneously in MIMO of a large-scale antenna system, and solve the problem that in the prior art, in MU-MIMO, a terminal cannot be informed of DMRS pilot pattern information applied to different time-frequency resources, so that DCI information cannot be transmitted normally.

Specifically, the step of obtaining the total number of the mimo multiplexed ports according to the downlink control information, and receiving and demodulating data includes: acquiring an indication bit in the downlink control information; determining the total port number of the multiple input multiple output multiplexing corresponding to the indication bit according to the indication bit and the mapping relation between the total port number and the indication bit; and receiving data for demodulation according to the determined total output port number.

In order to further improve the processing accuracy, the step of demodulating the received data according to the determined total port number includes: performing blind detection according to the determined total port number to obtain a first actual multiplexing port number; and receiving data for demodulation according to the number of the first actual multiplexing ports.

Also, in order to improve the processing accuracy, the step of obtaining the total number of the ports of the mimo multiplexing according to the downlink control information, and receiving data for demodulation includes: obtaining the total port number of the MIMO multiplexing according to the downlink control information; performing blind detection according to the total port number to obtain a second actual multiplexing port number; and receiving data for demodulation according to the number of the second actual multiplexing ports.

Specifically, the step of obtaining the total number of the mimo multiplexed ports according to the downlink control information, and receiving and demodulating data includes: determining the signaling bit length occupied by the downlink control information according to the divided number of scheduling resources; obtaining the total port number of the multiple input multiple output multiplexing according to the occupied signaling bit length and the downlink control information, and receiving data for demodulation; and the scheduling resource is a time-frequency resource allocated to the terminal by the base station.

Regarding determining the length of the signaling bit occupied by the downlink control information, two specific examples are provided in this embodiment:

first, the step of determining the length of the signaling bit occupied by the downlink control information according to the divided number of scheduling resources includes: determining the divided parts of the scheduling resources according to a preset rule and a scheduling resource part configuration value; and determining the length of the signaling bit occupied by the downlink control information according to the divided number of the scheduling resources.

I.e. how the reserved signalling bit length is determined in advance agreed with the base station. The preset rule may be any rule for selecting the target value in the configuration value of the number of scheduling resource shares as the number of the divided scheduling resources, and how to select the target value with a larger value.

It can also be understood that, before determining the signaling bit length occupied by the downlink control information according to the number of parts divided by the scheduling resource, the transmission method further includes: and determining the divided parts of the scheduling resources according to a preset rule and a scheduling resource part configuration value.

Secondly, the step of determining the length of the signaling bit occupied by the downlink control information according to the divided number of the scheduling resources comprises: receiving the divided parts of the scheduling resources sent by the base station by adopting a preset bit signaling; and determining the length of the signaling bit occupied by the downlink control information according to the divided number of the scheduling resources.

In this way, the base station directly informs the signaling bit length occupied by the downlink control information. The terminal may obtain the bit length (which may be predetermined by the base station and the terminal) required by the preset bit signaling, in addition to the number of divided scheduling resources. The signaling bit length actually determined by the terminal includes the signaling bit length required to be occupied by the preset bit signaling, in addition to the signaling bit length required to be occupied by the downlink control information.

It can also be understood that, before determining the signaling bit length occupied by the downlink control information according to the number of parts divided by the scheduling resource, the transmission method further includes: and receiving the divided parts of the scheduling resources sent by the base station by adopting the preset bit signaling.

The method for transmitting the downlink control information provided by the embodiment of the present invention is further described below with reference to the base station and the terminal.

Considering that a large bandwidth configuration needs to be supported under a 5G new air interface (NR), the number of PRBs (Physical Resource Block Physical Resource blocks) is large, and in order to reduce processing complexity, a new Resource allocation unit RBG (Resource Block Group) is defined in the NR, where each RBG includes x PRBs, and a specific x value is configured through a high layer.

In MU-MIMO, the base station allocates respective occupied resources according to the traffic demands of different users, so that the number of users multiplexed on different RBG resources may be different, and the total number of ports may be different. However, the number of selectable ports is generally less than the number of RBG resources, so that there are a plurality of RBG indexes corresponding to each port number. The port number mentioned below refers to the total number of ports of all users on the resource.

In NR, different DMRS patterns may be used for different port numbers, and in order to enable the terminal to correctly identify resource locations occupied by DMRS pilots for correct data reception and demodulation, this embodiment provides a scheme for how to notify the terminal of the total port number, which takes signaling overhead and accuracy into consideration.

Currently, as can be seen from the DMRS configurations in fig. 1 to 4, the possible port numbers to be notified to the terminal are {1,2,3,4,5,6,7,8} in fig. 1 and 2, and {1 to 12 ports {1,2,3,4,5,6,7,8,9,10,11,12} in fig. 3 and 4. If all possible port numbers are notified, signaling overhead of 4 bits is required, which is relatively large, and several processing examples are given below, which can reduce the signaling overhead (notifying information of the total port number of all users multiplexed on the scheduling resource at the same time).

Example one:

in consideration of fig. 1 to 4, in the DMRS configuration, at least 2DMRS ports are multiplexed per resource unit, that is, if the total number of MU-MIMO multiplexed ports is an odd port, the DMRS pilot resources occupied by the MU-MIMO multiplexed ports are the same as that of an even port added with 1, and therefore only the even port may be notified, and the DMRS pilot resources may be notified to the terminal through DCI information.

For fig. 1 and fig. 2, i.e., DMRS configuration1, there are a total of 4 possible port numbers {2,4,6,8}, which may be indicated by 2 bits;

for fig. 3 and fig. 4, i.e., DMRS configuration2, there are a total of 6

possible port numbers

2,4,6,8,10,12, which may be indicated by 3 bits.

In addition, if the total number of MU-MIMO multiplexed ports is an even port, the DMRS pilot resources occupied by the odd port subtracted by 1 are also the same, and therefore, only the odd port may be notified and the terminal may be notified by DCI information.

For fig. 1 and fig. 2, i.e., DMRS configuration1, there are a total of 4 possible port numbers {1,3,5,7}, which may be indicated by 2 bits;

for fig. 3 and fig. 4, i.e., DMRS configuration2, there are a total of 6

possible port numbers

1,3,5,8,9,11, which may be indicated by 3 bits.

The port number in this embodiment may be transmitted by an index.

Example two:

in consideration of the consideration in fig. 1 to fig. 4, there is a difference in the number of DMRS symbols in the same DMRS configuration, so that the terminal may be notified of the number of symbols occupied by the DMRS through DCI information, and the difference in the total port number is obtained according to the difference in the number of symbols. The information is notified to the terminal through DCI information. Can be represented by 1 bit.

The base station and the terminal can agree in advance: if the indication bit is 0, the number of DMRS symbols representing DMRS configuration1 or DMRS configuration2 is 1, and the total number of multiplexed ports is not more than 4(DMRS configuration 1) or not more than 6(DMRS configuration 2).

If the indication bit is 1, the number of DMRS symbols representing DMRS configuration1 or DMRS configuration2 is 2, and the total number of multiplexed ports is not less than 4 and not more than 8(DMRS configuration 1) or not less than 6 and not more than 12(DMRS configuration 2).

The indicated port sets in the two DMRS configurations may also be considered to be {4,8} and {6,12}, respectively. Represented by 1 bit.

Of course, the pre-agreement between the base station and the terminal may be (the corresponding relationship between the indication bit and the symbol number) opposite to the above description; that is, for example, the indication bit is 0, the number of DMRS symbols representing DMRS configuration1 or DMRS configuration2 is 2, and the like.

Because the number of the indicated ports and the actual number of the ports have certain deviation according to the method, the terminal can perform further blind detection on the basis of the information to judge the number of the actually multiplexed ports and then perform subsequent data receiving and demodulation (the blind detection cannot be directly performed, and the blind detection has errors to influence the terminal receiving).

Example three:

in the second example, the method for notifying the terminal of the multiplexed total port number information by indicating the number of symbols occupied by the DMRS is a relatively rough method, and the accuracy needs to be improved by depending on the blind detection capability of the terminal. In the example, the total number of the notified ports is encrypted (data density is increased) on the basis of the example two, and the complexity of blind detection of the terminal is reduced. May be indicated by 2 bits.

Such as: for fig. 1 and fig. 2, i.e., DMRS configuration1, there are a total of 4 possible port numbers {2,4,6,8}, which may be indicated by 2 bits;

for fig. 3 and fig. 4, i.e., DMRS configuration2, there are a total of 4

possible port numbers

4,6,8,12 or 4,6,10,12, which may be indicated by 2 bits.

Because the number of ports indicated according to this example and the actual number of ports still have a certain deviation, the terminal can further perform blind detection on the basis of the above information, determine the number of ports actually multiplexed, and then perform subsequent data reception and demodulation. An example of the signaling indication relationship for a set of port numbers is given below, see tables 1 and 2.

Table 1 mapping relation of DMRS configuration1

Indication of	Number of ports
		0	2
1	4
		2	6
3	8

Table 2 mapping relation of DMRS configuration2

Indication of	Number of ports
		0	4
1	6
		2	8
3	12

This example may also be a data reduction operation performed based on example one to further reduce signaling overhead, and details may be referred to the above description and are not described herein again.

In the above three examples (the base station notifies the terminal of the total port number information multiplexed by all users on the scheduling resource), no matter how many bits the port number notified to the terminal has, signaling overhead is brought, and under the condition that the signaling bits of the existing DCI are limited, the signaling overhead needs to be reduced as little as possible, so the scheme proposes that the MAC-CE (Medium Access Control-Control element) notifies the number of symbols occupied by the semi-static DMRS (that is, transmits the symbols through high-level signaling). There is no notification signaling overhead for the total port number in the DCI.

And if the base station updates the number of the DMRS configuration symbols in the scheduling process, updating the related information through the MAC-CE. Because the number of the ports indicated according to the operation has a certain deviation from the actual number of the ports, the terminal can further perform blind detection on the basis of the information, judge the number of the actually multiplexed ports, and then perform subsequent data receiving and demodulation.

Of course, in the above three examples, the base station may notify the terminal of the information of the total number of ports multiplexed by all users on the scheduling resource, or may perform the notification through a dedicated physical downlink control channel, which is not limited herein.

In the above scheme, as long as the number of ports indicated by the indication signaling is used, the number of ports may be indicated in a manner that the value of the signaling bit information is incremented or decremented, or may be indicated in any agreed manner;

such as: the number of ports to be notified is one of 2,4,6, and 8, and 2 bits are used for representation, so that 2 may be represented by bit 00, 4 may be represented by bit 01, 6 may be represented by

bit

10, 8 may be represented by bit 11, or other orders may be used as long as the base station and the terminal are agreed well in advance.

In addition, in the 5G NR system, in order to increase the peak rate of the UE, multiple transmission points (TRP, Tx/Rx Point) may be used, each UE may transmit PDSCH at multiple transmission points at the same time, multiple transmission points may transmit one PDSCH at the same time, different transmission points allocate part of ports therein, and ports between transmission points do not overlap; in this embodiment, if the current scheduling for the UE is a single transmission point, the total number of ports is obtained according to the scheme described above in the embodiment of the present invention, and if the current scheduling for the UE is multiple transmission points and one PDSCH is transmitted, the number of ports is obtained according to the number of ports allocated to the multiple transmission points, respectively, in the same manner as the scheme for the single transmission point, and then the number of ports of all the transmission points are added to obtain the total number of ports that needs to be notified to the UE when the current scheduling for the UE is performed.

Further, in practical applications, the base station allocates respective occupied resources according to the traffic demands of different users, so that different numbers of ports multiplexed on different scheduling resources may occur (for example, the total number of ports multiplexed on the first 50 RBGs is 6, and the total number of ports multiplexed on the last 50 RBGs is 8, and thus different DMRS configurations may be adopted). If a mode of uniformly informing one total port number on the whole scheduling resource is adopted, the terminal can be caused to adopt wrong DMRS configuration to carry out data receiving and demodulation; to address this problem, the present embodiment provides the following measures:

in the above description of the scheme, a signaling representation manner of the total number of multiplexed ports and the number of occupied bits are determined, where it is assumed that the number of occupied bits is M, the total scheduling resources are divided into X parts (the number of divided scheduling resources is X), X has two optional configuration values { X1, X2}, and each part can notify a port number corresponding to the scheduling resource of the part; two examples are given below for a calculation method (and a bit indication method) of bit length occupied by signaling, so as to solve the problem that the number of ports multiplexed by different scheduling resources is different;

example one:

the base station determines the length of the occupied bit of the signaling according to a rule predetermined with the terminal, such as: the given signaling is determined according to the size of the value of X, and a configuration value with a large value is adopted, that is, if X2> X1, the signaling required to be occupied is X2 × M bits.

Specifically, the method comprises the following steps: assuming that M is 2, X1 is 2, and X2 is 3, the reserved signaling bit length is 3 × 2-6 bits.

After receiving the downlink control information issued by the base station, the terminal can autonomously obtain the bit length occupied by the downlink control information (determined according to a rule agreed with the base station in advance).

Example two:

the base station selects from the configuration value according to the signaling bit length actually occupied by the downlink control information, and then informs the terminal, and can inform the selection of X by adding 1-bit signaling:

for example, if the 1-bit signaling is 0, X is represented as X1, and if the 1-bit signaling is 1, X is represented as X2, and the signaling bit length that needs to be reserved is notified of the actual port number according to the actual X result.

Specifically, the method comprises the following steps: assuming that M is 2, X1 is 2, and X2 is 3, if X1, the reserved signaling bit length is 1+2 × 2 is 5 bits. If X is X2, the reserved signaling bit length is 1+3 × 2-7 bits.

The terminal can determine the value of X by directly receiving bit signaling, so as to perform subsequent operations.

That is, for the terminal side, implicit indications can be obtained through example one, for example, the total number of bits is 6 bits, M is 2 bits, and then X is 3 bits. The value of X can also be directly informed by 1 bit in example two, and the value of X can be given in advance.

As can be seen from the above, the transmission method of the downlink control information provided in the embodiment of the present invention ensures that the signaling of the port number is correctly notified with a relatively small number of bits under a new air interface.

An embodiment of the present invention further provides a transmission apparatus for downlink control information, which can be applied to a base station side, as shown in fig. 8, and includes:

a first determining module 81, configured to determine, according to the demodulation reference signal configuration information, a total number of mimo multiplexed ports to be indicated;

the first processing module 82 is configured to obtain downlink control information according to the total port number, and send the downlink control information to the terminal;

The transmission device of the downlink control information provided by the embodiment of the invention determines the total port number of the MIMO multiplexing to be indicated according to the demodulation reference signal configuration information; obtaining downlink control information according to the total port number, and sending the downlink control information to the terminal; and the number of the total port number is smaller than the number of the candidate values of the total port number corresponding to the demodulation reference signal configuration information; the method can ensure the correct transmission of the demodulation reference signal for channel estimation when a plurality of data streams are transmitted simultaneously in the MIMO of a large-scale antenna system, and solves the problem that the terminal cannot be informed of DMRS pilot pattern information applied to different time-frequency resources in the prior art when MU-MIMO is performed, so that DCI information cannot be transmitted normally; and the port number signaling can be notified by using a small number of bits under a new air interface, so that system resources are saved.

first, the first determining module comprises: the first determining submodule is used for determining a set of candidate values of the total port number according to the demodulation reference signal configuration information; and the first processing submodule is used for selecting the odd port number or the even port number from the candidate value set as the total port number of the MIMO multiplexing to be indicated.

Wherein the first processing sub-module comprises: the first processing unit is used for selecting the number of odd ports or the number of even ports from the candidate value set to obtain an initial set; and reducing the initial set to obtain the total number of the MIMO multiplexed ports to be indicated.

Second, the first determining module comprises: the second determining submodule is used for determining the number of symbols occupied by the demodulation reference signal according to the demodulation reference signal configuration information; and determining the total port number of the MIMO multiplexing to be indicated according to the symbol number.

Wherein the second determination submodule includes: a first determining unit, configured to determine an initial candidate value set of a total port number according to the symbol number; and the second processing unit is used for performing expansion processing on the initial candidate value set to obtain the total port number of the MIMO multiplexing to be indicated.

Specifically, the first processing module includes: a third determining submodule, configured to determine, according to the total port number and a mapping relationship between the total port number and an indication bit, an indication bit corresponding to the total port number; and the second processing submodule is used for obtaining the downlink control information according to the indication bit and sending the downlink control information to the terminal.

In this embodiment, the first processing module includes: and the third processing submodule is used for obtaining downlink control information according to the total port number and sending the downlink control information to the terminal through a high-level signaling or a special physical downlink control channel corresponding to the terminal.

Further, when the number of transmission points is multiple, the first determining module includes: the fourth determining submodule is used for determining the total port number corresponding to each transmission point according to the demodulation reference signal configuration information corresponding to each transmission point; and determining the total port number of the MIMO multiplexing to be indicated according to the total port number corresponding to each transmission point.

In this embodiment, the first processing module includes: the fourth processing submodule is used for obtaining downlink control information according to the total port number; determining a reserved signaling bit length according to the number of divided scheduling resources; sending the downlink control information to a terminal according to the reserved signaling bit length; and the scheduling resource is a time-frequency resource allocated to the terminal by the base station.

first, the fourth processing submodule includes: the second determining unit is used for determining the divided parts of the scheduling resources according to a preset rule and the configuration value of the parts of the scheduling resources; the reserved signaling bit length is determined according to the number of divided scheduling resources.

It is also understood that the transmission device further comprises: and the second determining module is used for determining the divided parts of the scheduling resources according to the preset rule and the configuration value of the parts of the scheduling resources before determining the length of the reserved signaling bit according to the divided parts of the scheduling resources.

In a second aspect, the fourth processing sub-module includes: a third determining unit, configured to determine the number of divided scheduling resources according to the configuration value of the number of scheduling resources and the length of signaling bits required to be occupied by the downlink control information; the reserved signaling bit length is determined according to the number of divided scheduling resources.

It is also understood that the transmission device further comprises: and a third determining module, configured to determine the number of divided scheduling resources according to the configuration value of the number of scheduling resources and the length of signaling bits required to be occupied by the downlink control information before determining the length of reserved signaling bits according to the number of divided scheduling resources.

Further, the transmission device further includes: and the first sending module is used for sending the divided parts of the scheduling resources to the terminal by adopting a preset bit signaling after determining the bit length of the reserved signaling according to the divided parts of the scheduling resources.

The implementation embodiments of the method for transmitting downlink control information on the base station side are all applicable to the embodiment of the apparatus for transmitting downlink control information, and the same technical effects can be achieved.

As can be seen from the above, the transmission apparatus for downlink control information provided in the embodiments of the present invention well solves the problem in the prior art that, in MU-MIMO, the terminal cannot be notified of DMRS pilot pattern information applied to different time-frequency resources, so that DCI information cannot be normally transmitted.

An embodiment of the present invention further provides a device for transmitting downlink control information, which can be applied to a terminal side, as shown in fig. 9, and includes:

a first receiving module 91, configured to receive downlink control information sent by a base station;

a second processing module 92, configured to obtain a total number of mimo multiplexed ports according to the downlink control information, and receive data for demodulation;

The embodiment of the invention provides a transmission device of the downlink control information, which receives the downlink control information sent by a base station; obtaining the total port number of the MIMO multiplexing according to the downlink control information, and receiving data for demodulation; the method and the device can ensure that the demodulation reference signal for channel estimation is correctly transmitted when a plurality of data streams are simultaneously transmitted in the MIMO of a large-scale antenna system, and solve the problem that the DCI information cannot be normally transmitted because the terminal cannot be informed of DMRS pilot pattern information applied to different time-frequency resources in the MU-MIMO in the prior art.

Specifically, the second processing module includes: a first obtaining submodule, configured to obtain an indicator bit in the downlink control information; a fifth determining submodule, configured to determine, according to the indication bit and a mapping relationship between a total port number and the indication bit, a total port number of the mimo multiplexing corresponding to the indication bit; and the fifth processing submodule is used for receiving the data and demodulating according to the determined total port number.

In order to further improve the processing precision, the fifth processing submodule includes: the third processing unit is used for performing blind detection according to the determined total port number to obtain a first actual multiplexing port number; and receiving data for demodulation according to the number of the first actual multiplexing ports.

Also in order to improve processing accuracy, the second processing module includes: a sixth processing submodule, configured to obtain a total number of multiple-input multiple-output multiplexed ports according to the downlink control information; performing blind detection according to the total port number to obtain a second actual multiplexing port number; and receiving data for demodulation according to the number of the second actual multiplexing ports.

Specifically, the second processing module includes: a seventh processing submodule, configured to determine, according to the number of divided scheduling resources, a signaling bit length occupied by the downlink control information; obtaining the total port number of the multiple input multiple output multiplexing according to the occupied signaling bit length and the downlink control information, and receiving data for demodulation; and the scheduling resource is a time-frequency resource allocated to the terminal by the base station.

first, the seventh processing sub-module includes: a fourth determining unit, configured to determine the number of divided scheduling resources according to a preset rule and a scheduling resource number configuration value; and determining the length of the signaling bit occupied by the downlink control information according to the divided number of the scheduling resources.

It is also understood that the transmission device further comprises: and a fourth determining module, configured to determine the number of divided scheduling resources according to a preset rule and a scheduling resource number configuration value before determining the signaling bit length occupied by the downlink control information according to the number of divided scheduling resources.

Second, the seventh processing sub-module includes: a first receiving unit, configured to receive the number of divided scheduling resources sent by the base station using the preset bit signaling; and a fifth determining unit, configured to determine, according to the number of divided parts of the scheduling resource, a signaling bit length occupied by the downlink control information.

It is also understood that the transmission device further comprises: and a second receiving module, configured to receive the divided number of parts of the scheduling resource sent by the base station by using a preset bit signaling before determining the signaling bit length occupied by the downlink control information according to the divided number of parts of the scheduling resource.

The implementation embodiments of the method for transmitting downlink control information on the terminal side are all applicable to the embodiment of the apparatus for transmitting downlink control information, and the same technical effects can be achieved.

The base station provided by the embodiment of the invention determines the total port number of the MIMO multiplexing to be indicated according to the configuration information of the demodulation reference signal; obtaining downlink control information according to the total port number, and sending the downlink control information to the terminal; and the number of the total port number is smaller than the number of the candidate values of the total port number corresponding to the demodulation reference signal configuration information; the method can ensure the correct transmission of the demodulation reference signal for channel estimation when a plurality of data streams are transmitted simultaneously in the MIMO of a large-scale antenna system, and solves the problem that the terminal cannot be informed of DMRS pilot pattern information applied to different time-frequency resources in the prior art when MU-MIMO is performed, so that DCI information cannot be transmitted normally; and the port number signaling can be notified by using a small number of bits under a new air interface, so that system resources are saved.

Specifically, as shown in fig. 10, the base station of the embodiment of the present invention includes:

a processor 101; and a memory 103 connected to the processor 101 through a bus interface 102, wherein the memory 103 is used for storing programs and data used by the processor 101 in executing operations, and when the processor 101 calls and executes the programs and data stored in the memory 103, the following processes are executed:

obtaining downlink control information according to the total port number, and sending the downlink control information to the terminal through the transceiver 104;

Among other things, the transceiver 104 is connected to the bus interface 102 for receiving and transmitting data under the control of the processor 101.

It should be noted that in fig. 10, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 101 and various circuits of memory represented by memory 103 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 104 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 101 is responsible for managing the bus architecture and general processing, and the memory 103 may store data used by the processor 101 in performing operations.

Those skilled in the art will appreciate that all or part of the steps for implementing the above embodiments may be performed by hardware, or may be instructed to be performed by associated hardware by a computer program that includes instructions for performing some or all of the steps of the above methods; and the computer program may be stored in a readable storage medium, which may be any form of storage medium.

Wherein the processor implements the following steps when executing the program: determining a set of candidate values of the total port number according to the demodulation reference signal configuration information; and selecting the odd port number or the even port number from the candidate value set as the total port number of the MIMO multiplexing to be indicated.

Specifically, the processor implements the following steps when executing the program: selecting the number of odd ports or the number of even ports from the candidate value set to obtain an initial set; and reducing the initial set to obtain the total number of the MIMO multiplexed ports to be indicated.

Wherein the processor, when executing the program, may further implement the steps of: determining the number of symbols occupied by the demodulation reference signal according to the demodulation reference signal configuration information; and determining the total port number of the MIMO multiplexing to be indicated according to the symbol number.

Specifically, the processor implements the following steps when executing the program: determining an initial candidate value set of the total port number according to the symbol number; and expanding the initial candidate value set to obtain the total port number of the MIMO multiplexing to be indicated.

More specifically, the processor executes the program to implement the following steps: determining an indication bit corresponding to the total port number according to the total port number and a mapping relation between the total port number and the indication bit; and obtaining downlink control information according to the indication bit and sending the downlink control information to the terminal.

Optionally, the processor implements the following steps when executing the program: and obtaining downlink control information according to the total port number, and sending the downlink control information to the terminal through a high-level signaling or a special physical downlink control channel corresponding to the terminal.

When the number of the transmission points is multiple, the processor executes the program to realize the following steps: determining the total port number corresponding to each transmission point according to the demodulation reference signal configuration information corresponding to each transmission point; and determining the total port number of the MIMO multiplexing to be indicated according to the total port number corresponding to each transmission point.

Wherein the processor implements the following steps when executing the program: obtaining downlink control information according to the total port number; determining a reserved signaling bit length according to the number of divided scheduling resources; sending the downlink control information to a terminal according to the reserved signaling bit length; and the scheduling resource is a time-frequency resource allocated to the terminal by the base station.

Optionally, the processor implements the following steps when executing the program: before determining the length of the reserved signaling bit according to the divided number of the scheduling resources, determining the divided number of the scheduling resources according to a preset rule and a configuration value of the number of the scheduling resources.

Optionally, the processor implements the following steps when executing the program: before determining the length of the reserved signaling bit according to the divided number of the scheduling resources, determining the divided number of the scheduling resources according to the configuration value of the number of the scheduling resources and the length of the signaling bit occupied by the downlink control information.

Further, the processor executes the program to implement the following steps: and after determining the bit length of the reserved signaling according to the divided parts of the scheduling resources, sending the divided parts of the scheduling resources to a terminal by adopting a preset bit signaling.

The implementation embodiments of the method for transmitting downlink control information at the base station side are all applicable to the embodiment of the base station, and the same technical effects can be achieved.

Therefore, the base station provided by the embodiment of the invention well solves the problem that the terminal cannot be informed of the DMRS pilot pattern information applied to different time frequency resources during MU-MIMO in the prior art, so that DCI information cannot be normally transmitted.

receiving downlink control information sent by a base station;

The embodiment of the invention provides that the terminal receives downlink control information sent by a base station; obtaining the total port number of the MIMO multiplexing according to the downlink control information, and receiving data for demodulation; the method and the device can ensure correct transmission of DeModulation Reference signals (DMRS) for channel estimation when multiple data streams are transmitted simultaneously in MIMO of a large-scale antenna system, and solve the problem that in the prior art, in MU-MIMO, a terminal cannot be informed of DMRS pilot pattern information applied to different time-frequency resources, so that DCI information cannot be transmitted normally.

As shown in fig. 11, the terminal provided in the embodiment of the present invention includes:

a processor 111; and a memory 113 connected to the processor 111 through a bus interface 112, wherein the memory 113 is used for storing programs and data used by the processor 111 in executing operations, and when the processor 111 calls and executes the programs and data stored in the memory 113, the following processes are executed:

receiving downlink control information transmitted by the base station through the transceiver 114;

Among other things, the transceiver 114 is connected to the bus interface 112 for receiving and transmitting data under the control of the processor 111.

It should be noted that in fig. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 111 and various circuits of memory represented by memory 113 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 114 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. For different terminals, the user interface 115 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 111 is responsible for managing the bus architecture and general processing, and the memory 113 may store data used by the processor 111 in performing operations.

Specifically, the processor implements the following steps when executing the program: acquiring an indication bit in the downlink control information; determining the total port number of the multiple input multiple output multiplexing corresponding to the indication bit according to the indication bit and the mapping relation between the total port number and the indication bit; and according to the determined total port number, receiving data and demodulating.

In order to further improve the processing precision, the processor executes the program to realize the following steps: performing blind detection according to the determined total port number to obtain a first actual multiplexing port number; and receiving data for demodulation according to the number of the first actual multiplexing ports.

Also in order to improve the processing accuracy, the processor executes the program to realize the following steps: obtaining the total port number of the MIMO multiplexing according to the downlink control information; performing blind detection according to the total port number to obtain a second actual multiplexing port number; and receiving data for demodulation according to the number of the second actual multiplexing ports.

Specifically, the processor implements the following steps when executing the program: determining the signaling bit length occupied by the downlink control information according to the divided number of scheduling resources; obtaining the total port number of the multiple input multiple output multiplexing according to the occupied signaling bit length and the downlink control information, and receiving data for demodulation; and the scheduling resource is a time-frequency resource allocated to the terminal by the base station.

Wherein the processor implements the following steps when executing the program: before determining the signaling bit length occupied by the downlink control information according to the divided number of the scheduling resources, determining the divided number of the scheduling resources according to a preset rule and a scheduling resource number configuration value.

The processor, when executing the program, may further implement the steps of: and before determining the signaling bit length occupied by the downlink control information according to the divided parts of the scheduling resources, receiving the divided parts of the scheduling resources sent by the base station by adopting a preset bit signaling.

The implementation embodiments of the method for transmitting downlink control information at the terminal side are all applicable to the embodiment of the terminal, and the same technical effect can be achieved.

Therefore, the terminal provided by the embodiment of the invention well solves the problem that the terminal cannot be informed of DMRS pilot pattern information applied to different time frequency resources during MU-MIMO in the prior art, so that DCI information cannot be normally transmitted.

The computer program stored on the computer-readable storage medium according to the embodiment of the present invention can determine the total number of mimo multiplexing ports to be indicated according to the demodulation reference signal configuration information; obtaining downlink control information according to the total port number, and sending the downlink control information to the terminal; and the number of the total port number is smaller than the number of the candidate values of the total port number corresponding to the demodulation reference signal configuration information; the method and the device ensure correct transmission of demodulation reference signals for channel estimation when multiple data streams are transmitted simultaneously in MIMO of a large-scale antenna system, and solve the problem that in the prior art, when MU-MIMO is adopted, DMRS pilot pattern information applied to different time-frequency resources cannot be notified to a terminal, so that DCI information cannot be transmitted normally; and the port number signaling can be notified by using a small number of bits under a new air interface, so that system resources are saved.

Wherein the program when executed by a processor implements the steps of: determining a set of candidate values of the total port number according to the demodulation reference signal configuration information; and selecting the odd port number or the even port number from the candidate value set as the total port number of the MIMO multiplexing to be indicated.

Specifically, the program realizes the following steps when being executed by a processor: selecting the number of odd ports or the number of even ports from the candidate value set to obtain an initial set; and reducing the initial set to obtain the total number of the MIMO multiplexed ports to be indicated.

Wherein the program when executed by a processor implements the steps of: determining the number of symbols occupied by the demodulation reference signal according to the demodulation reference signal configuration information; and determining the total port number of the MIMO multiplexing to be indicated according to the symbol number.

In order to ensure a certain accuracy, the program when executed by a processor implements the steps of: determining an initial candidate value set of the total port number according to the symbol number; and expanding the initial candidate value set to obtain the total port number of the MIMO multiplexing to be indicated.

Specifically, the program realizes the following steps when being executed by a processor: determining an indication bit corresponding to the total port number according to the total port number and a mapping relation between the total port number and the indication bit; and obtaining downlink control information according to the indication bit and sending the downlink control information to the terminal.

In this embodiment, the program implements the following steps when executed by a processor: and obtaining downlink control information according to the total port number, and sending the downlink control information to the terminal through a high-level signaling or a special physical downlink control channel corresponding to the terminal.

Further, when the number of transmission points is plural, the program is executed by the processor to implement the steps of: determining the total port number corresponding to each transmission point according to the demodulation reference signal configuration information corresponding to each transmission point; and determining the total port number of the MIMO multiplexing to be indicated according to the total port number corresponding to each transmission point.

Wherein the program when executed by a processor implements the steps of: obtaining downlink control information according to the total port number; determining a reserved signaling bit length according to the number of divided scheduling resources; sending the downlink control information to a terminal according to the reserved signaling bit length; and the scheduling resource is a time-frequency resource allocated to the terminal by the base station.

Further, the program when executed by the processor implements the steps of: before determining the length of the reserved signaling bit according to the divided number of the scheduling resources, determining the divided number of the scheduling resources according to a preset rule and a configuration value of the number of the scheduling resources.

The program when executed by the processor may further implement the steps of: before determining the length of the reserved signaling bit according to the divided number of the scheduling resources, determining the divided number of the scheduling resources according to the configuration value of the number of the scheduling resources and the length of the signaling bit occupied by the downlink control information.

Further, the program when executed by the processor implements the steps of: and after determining the bit length of the reserved signaling according to the divided parts of the scheduling resources, sending the divided parts of the scheduling resources to a terminal by adopting a preset bit signaling.

The implementation embodiments of the method for transmitting downlink control information on the base station side are all applicable to the embodiment of the computer-readable storage medium, and the same technical effects can be achieved.

As can be seen from the above, the computer program stored on the computer-readable storage medium according to the embodiment of the present invention can well solve the problem that, in the prior art, when performing MU-MIMO, the terminal cannot be notified of DMRS pilot pattern information applied to different time-frequency resources, so that DCI information cannot be transmitted normally.

receiving downlink control information sent by a base station;

The embodiment of the present invention provides that a computer program stored on the computer-readable storage medium receives downlink control information sent by a base station; obtaining the total port number of the MIMO multiplexing according to the downlink control information, and receiving data for demodulation; the method and the device can ensure correct transmission of DeModulation Reference signals (DMRS) for channel estimation when multiple data streams are transmitted simultaneously in MIMO of a large-scale antenna system, and solve the problem that in the prior art, in MU-MIMO, a terminal cannot be informed of DMRS pilot pattern information applied to different time-frequency resources, so that DCI information cannot be transmitted normally.

Specifically, the program realizes the following steps when being executed by a processor: acquiring an indication bit in the downlink control information; determining the total port number of the multiple input multiple output multiplexing corresponding to the indication bit according to the indication bit and the mapping relation between the total port number and the indication bit; and according to the determined total port number, receiving data and demodulating.

To further improve the processing accuracy, the program when executed by the processor implements the steps of: performing blind detection according to the determined total port number to obtain a first actual multiplexing port number; and receiving data for demodulation according to the number of the first actual multiplexing ports.

Also in order to improve the processing accuracy, the program realizes the following steps when executed by a processor: obtaining the total port number of the MIMO multiplexing according to the downlink control information; performing blind detection according to the total port number to obtain a second actual multiplexing port number; and receiving data for demodulation according to the number of the second actual multiplexing ports.

Specifically, the program realizes the following steps when being executed by a processor: determining the signaling bit length occupied by the downlink control information according to the divided number of scheduling resources; obtaining the total port number of the multiple input multiple output multiplexing according to the occupied signaling bit length and the downlink control information, and receiving data for demodulation; and the scheduling resource is a time-frequency resource allocated to the terminal by the base station.

Wherein the program when executed by a processor implements the steps of: before determining the signaling bit length occupied by the downlink control information according to the divided number of the scheduling resources, determining the divided number of the scheduling resources according to a preset rule and a scheduling resource number configuration value.

The program when executed by the processor may further implement the steps of: and before determining the signaling bit length occupied by the downlink control information according to the divided parts of the scheduling resources, receiving the divided parts of the scheduling resources sent by the base station by adopting a preset bit signaling.

The implementation embodiments of the method for transmitting downlink control information on the terminal side are all applicable to the embodiment of the computer-readable storage medium, and the same technical effects can be achieved.

It should be noted that many of the functional components described in this specification are referred to as modules/sub-modules in order to more particularly emphasize their implementation independence.

In embodiments of the invention, the modules/sub-modules may be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be constructed as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different bits which, when joined logically together, comprise the module and achieve the stated purpose for the module.

Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Likewise, operational data may be identified within the modules and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network.

When a module can be implemented by software, considering the level of existing hardware technology, a module implemented by software may build a corresponding hardware circuit to implement a corresponding function, without considering cost, and the hardware circuit may include a conventional Very Large Scale Integration (VLSI) circuit or a gate array and an existing semiconductor such as a logic chip, a transistor, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. A method for transmitting downlink control information is characterized by comprising the following steps:

the number of the total port number is smaller than the number of the candidate values of the total port number corresponding to the demodulation reference signal configuration information;

when the number of the transmission points is multiple, the step of determining the total number of the ports of the mimo multiplexing to be indicated according to the demodulation reference signal configuration information includes:

2. The transmission method according to claim 1, wherein the step of determining the total number of ports of the mimo multiplexing to be indicated according to the demodulation reference signal configuration information comprises:

3. The transmission method according to claim 2, wherein the step of selecting the odd port number or the even port number from the set of candidate values as the total port number of the mimo multiplexing to be indicated comprises:

4. The transmission method according to claim 1, wherein the step of determining the total number of ports of the mimo multiplexing to be indicated according to the demodulation reference signal configuration information comprises:

5. The transmission method according to claim 4, wherein the step of determining the total number of ports of the mimo multiplexing to be indicated according to the number of symbols comprises:

6. The transmission method according to claim 4 or 5, wherein the step of obtaining the downlink control information according to the total port number and sending the downlink control information to the terminal comprises:

7. The transmission method according to claim 1, wherein the step of obtaining the downlink control information according to the total port number and sending the downlink control information to the terminal comprises:

8. The transmission method according to claim 1, wherein the step of obtaining the downlink control information according to the total port number and sending the downlink control information to the terminal comprises:

obtaining downlink control information according to the total port number;

9. The transmission method according to claim 8, wherein before determining the reserved signaling bit length based on the number of parts the scheduled resource is partitioned into, the transmission method further comprises:

10. The transmission method according to claim 8, wherein before determining the reserved signaling bit length based on the number of parts the scheduled resource is partitioned into, the transmission method further comprises:

11. The transmission method according to claim 10, wherein after determining the reserved signaling bit length according to the number of parts of the scheduling resource that is divided, the transmission method further comprises:

12. A method for transmitting downlink control information is characterized by comprising the following steps:

receiving downlink control information sent by a base station;

wherein, the obtained number of the total ports is smaller than the number of the candidate values of the total ports corresponding to the demodulation reference signal configuration information in the downlink control information;

when the number of the transmission points is multiple, the total port number of the multiple input multiple output multiplexing is determined by the base station according to the demodulation reference signal configuration information corresponding to each transmission point; and determining according to the total port number corresponding to each transmission point.

13. The transmission method according to claim 12, wherein the step of obtaining a total number of ports for mimo multiplexing according to the downlink control information, and receiving and demodulating data includes:

acquiring an indication bit in the downlink control information;

14. The transmission method according to claim 13, wherein the step of demodulating the received data according to the determined total number of ports comprises:

15. The transmission method according to claim 12, wherein the step of obtaining a total number of ports for mimo multiplexing according to the downlink control information, and receiving and demodulating data includes:

16. The transmission method according to claim 12, wherein the step of obtaining a total number of ports for mimo multiplexing according to the downlink control information, and receiving and demodulating data includes:

17. The transmission method according to claim 16, wherein before determining the signaling bit length occupied by the downlink control information according to the divided parts of the scheduling resources, the transmission method further comprises:

18. The transmission method according to claim 16, wherein before determining the signaling bit length occupied by the downlink control information according to the divided parts of the scheduling resources, the transmission method further comprises:

19. A device for transmitting downlink control information, comprising:

when the number of transmission points is plural, the first determining module includes:

20. The transmission apparatus of claim 19, wherein the first determining module comprises:

21. The transmission apparatus of claim 20, wherein the first processing sub-module comprises:

22. The transmission apparatus of claim 19, wherein the first determining module comprises:

23. The transmission apparatus of claim 22, wherein the second determining submodule comprises:

24. The transmission apparatus according to claim 22 or 23, wherein the first processing module comprises:

25. The transmission apparatus of claim 19, wherein the first processing module comprises:

26. The transmission apparatus of claim 19, wherein the first processing module comprises:

27. The transmission apparatus of claim 26, further comprising:

28. The transmission apparatus of claim 26, further comprising:

29. The transmission apparatus of claim 28, further comprising:

30. A device for transmitting downlink control information, comprising:

31. The transmission apparatus of claim 30, wherein the second processing module comprises:

32. The transmission apparatus of claim 31, wherein the fifth processing sub-module comprises:

33. The transmission apparatus of claim 30, wherein the second processing module comprises:

34. The transmission apparatus of claim 30, wherein the second processing module comprises:

35. The transmission apparatus of claim 34, further comprising:

36. The transmission apparatus of claim 34, further comprising:

37. A base station comprising a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the program:

when the number of the transmission points is multiple, the processor executes the program to realize the following steps:

38. A terminal comprising a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the program:

receiving downlink control information sent by a base station;

39. A computer-readable storage medium, on which a computer program is stored, which program, when executed by a processor, carries out the steps of:

when the number of transmission points is plural, the program when executed by the processor implements the steps of:

40. A computer-readable storage medium, on which a computer program is stored, which program, when executed by a processor, carries out the steps of:

receiving downlink control information sent by a base station;

when the number of the transmission points is multiple, the total port number of the multiple input multiple output multiplexing is determined by the base station according to the demodulation reference signal configuration information corresponding to each transmission point;

and determining according to the total port number corresponding to each transmission point.