CN109391398B

CN109391398B - Downlink control information indication method and network side equipment

Info

Publication number: CN109391398B
Application number: CN201710680105.XA
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: 2021-02-26
Anticipated expiration: 2037-08-10
Also published as: CN109391398A

Abstract

The invention provides a downlink control information indication method and network side equipment, relates to the technical field of communication, and is used for notifying DMRS configuration information to a user terminal under a new air interface so that the user terminal can acquire allocated port resources. The invention discloses a downlink control information indication method which is applied to network side equipment, and the method comprises the following steps: acquiring the port number and/or DMRS pilot frequency position configuration identification corresponding to each resource block set RBG; and generating downlink control information according to the acquired port number corresponding to the RBG and/or the DMRS pilot frequency position configuration identifier.

Description

Downlink control information indication method and network side equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a downlink control information indication method and a network side device.

Background

In an LTE (Long Term Evolution) system, a user terminal may perform channel estimation through a dedicated DMRS (DeModulation Reference Signal), where the DMRS 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 a Code division manner (using OCC (Orthogonal Cover Code)) or a frequency division manner, and fig. 1 shows DMRS resources of a downlink subframe of an LTE system, where 11 corresponds to

ports

7, 8, 11, 13, and 12 corresponds to

ports

9, 10, 12, and 14. 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 time-frequency resource RE occupied by DMRS, the MU-MIMO (multi-user multiple input multiple output) transmission mode in LTE Rel-10 only uses

ports

7 and 8, i.e. only 2 orthogonal DMRSs through OCC, and can distinguish the DMRSs allocated to a plurality of data streams in a quasi-orthogonal (same precoding/beamforming and different DMRS scrambling sequences as data channels) mode. The OCC length is 2 when only

ports

7, 8 are present. The DCI (Downlink Control Information) includes DMRS ports allocated to users and nSCID indication describing DMRS scrambling sequences, as shown in table 1, antenna ports, scrambling identifiers, and data stream number indication of LTE Rel-10. In the discussion of FD-MIMO (Full Dimension-MIMO), which is a prior art of 3GPP (3rd Generation Partnership Project) standard as a large-scale antenna, an extension method of DMRSs 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.

TABLE 1

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 terminal knows the port resources allocated to itself, information detection and demodulation can be performed according to the fixed DMRS pilot pattern.

After a 5G NR (New Radio) project is started, a DMRS pilot pattern is designed and defined again in order to reduce processing delay and improve system performance. In the new DMRS pilot pattern, there are a number of different pilot patterns. The concrete configuration is as follows:

configuration 1:

the number of DMRS symbols is 1, and comb2+ CS2 is adopted, so that 4 ports are supported maximally.

As shown in fig. 2, 11 denotes REs corresponding to

ports

2 and 3, and 12 denotes REs corresponding to

ports

0 and 1. Wherein, comb2 is frequency domain multiplexing, for example, 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.

The number of DMRS symbols is 2, and comb2+ CS2+ TD-OCC ({ 11 } and {1-1}) is adopted, and the maximum support is carried out to 8 ports.

As shown in fig. 3, 21 denotes REs corresponding to

ports

2,3, 6, and 7, and 22 denotes REs corresponding to

ports

0, 1, 4, and 5. The TD-OCC is time domain OCC (orthogonal Cover code) multiplexing, such as time domain OCC multiplexing 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 the maximum support is realized to 6 ports.

As shown in fig. 4, 31 denotes REs corresponding to

ports

4 and 5, 32 denotes REs corresponding to

ports

2 and 3, and 33 denotes REs corresponding to

ports

0 and 1. 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.

The number of DMRS symbols is 2, and 2-FD-OCC (adjacent frequency domain RE) + TD-OCC ({ 11 } and {1-1}) is adopted, and maximum support is carried out to 12 ports.

As shown in fig. 5, 41 denotes REs corresponding to

ports

4, 5, 10, 11, 42 denotes REs corresponding to

ports

2,3, 8, 9, and 43 denotes REs corresponding to

ports

0, 1, 6, 7. The FD-OCC is frequency 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 (pilot patterns) of DMRSs, if the maximum number of supported ports does not exceed 4 in the case of configuration1, it can be configured with the patterns of fig. 2; if the maximum number of ports supported exceeds 4, but does not exceed 8, it can be configured with the pattern of FIG. 3; 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 the maximum number of supported ports 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.

In NR, it has been confirmed that the content of DCI information to be included is as follows: the resource information comprises carrier information and time-frequency resource allocation; MCS (Modulation and Coding Scheme) information; HARQ (Hybrid Automatic Repeat reQuest) related information including a new data indication, an RV (Redundancy Version), an HARQ process, and the like; PUCCH (Physical Uplink Control Channel) related information including power and resource information; the multi-antenna related Information comprises an antenna port, a scrambling code ID (identification), the number of layers and the like, CSI (Channel State Information) related Information comprising a CSI measurement reporting mechanism, SRS (Sounding Reference Signal) related Information and RNTI (Radio Network temporary Identity), wherein the multi-antenna Information comprises the content required by DMRS configuration and is not determined at present.

Disclosure of Invention

In view of this, the present invention provides a downlink control information indication method and a network side device, which can notify DMRS configuration information to a user terminal under a new air interface, so that the user terminal knows allocated port resources.

The embodiment of the invention provides a downlink control information indication method, which is applied to network side equipment and comprises the following steps:

acquiring the port number and/or DMRS pilot frequency position configuration identification corresponding to each resource block set RBG;

and generating downlink control information according to the acquired port number corresponding to the RBG and/or the DMRS pilot frequency position configuration identifier.

Further, the step of generating the downlink control information includes:

dividing RBGs with the same port number into a group, and establishing an RBG identification set of each group of RBGs;

sequencing the port numbers corresponding to all RBGs in a descending order to obtain a port number set, wherein each port number in the port number set corresponds to an RBG identification set;

acquiring the number X of RBG identification sets needing to be notified to a user terminal in downlink control information, selecting the first X port numbers from the port number sets, and merging the RBG identification sets corresponding to other port numbers except the first X port numbers into the RBG identification set corresponding to the Xth port number;

and placing the X port numbers and the corresponding RBG identification sets in the downlink control information.

Further, the step of generating the downlink control information includes:

sequencing the RBG numbers corresponding to the same port number from large to small to obtain an RBG set;

acquiring the number X of RBG identification sets needing to be notified to a user terminal in downlink control information, selecting the number of the first X RBGs from the RBG sets, determining the number of ports corresponding to the number X of RBGs, wherein the number of ports corresponding to the number X of RBGs is the maximum number of ports corresponding to the number of other RBGs except the number of the first X-1 RBGs, and combining the RBG identifications corresponding to the number X of RBGs into the RBG identification set corresponding to the number X of RBGs;

and placing the port number corresponding to the X RBG numbers and the RBG identification set corresponding to the port number in the downlink control information.

Further, the step of generating the downlink control information includes:

dividing all RBGs into X groups, and taking the maximum value of the port numbers corresponding to the RBGs in each group as the port number corresponding to the RBG in the group;

and placing the port number corresponding to each group of RBGs and the identification set of each group of RBGs in the downlink control information.

Further, the dividing all RBGs into X groups includes:

dividing all RBGs into X groups; or

And dividing all RBGs into X groups according to the port number corresponding to the RBGs.

Further, the dividing all the RBGs into X groups according to the number of ports corresponding to the RBGs includes:

dividing all RBGs into X groups according to the size of the port number, wherein the port number corresponding to each group of RBGs belongs to the same value interval, and the value intervals corresponding to the port numbers corresponding to different groups of RBGs are not overlapped.

Further, the step of generating the downlink control information includes:

dividing all RBGs into a first group and a second group according to the number of OFDM symbols occupied by the DMRS pilot frequency, wherein the number of OFDM symbols occupied by the RBGs in the first group is 1, the number of OFDM symbols occupied by the RBGs in the second group is 2, and taking the maximum value of the number of ports corresponding to each group of RBGs as the number of ports corresponding to the group of RBGs;

Further, the step of generating the downlink control information includes:

dividing all RBGs into X groups, and acquiring the number of representative ports corresponding to the RBGs in each group;

for each group of RBGs, calculating the difference between the actual port number of each RBG and the corresponding representative port number;

and placing the number of the representative ports corresponding to each group of RBGs, the difference value and the identification set of each group of RBGs in the downlink control information.

Further, the representative port number is the maximum value, the minimum value, the average value of the port numbers corresponding to the RBGs in each group, or the port number corresponding to the maximum RBG.

Further, the step of generating the downlink control information includes:

acquiring the number of representative ports corresponding to all RBGs;

and placing the representative port number of all RBGs in the downlink control information.

Further, the representative port number is the maximum value, the minimum value, the average value of the port numbers corresponding to all the RBGs or the port number corresponding to the most RBGs.

Further, when the port number corresponding to the RBG does not uniquely correspond to a DMRS pilot position configuration identifier, the method further includes:

calculating a pilot position configuration difference value between a DMRS pilot position configuration identifier corresponding to the actual port number of each RBG in each group and a DMRS pilot position configuration identifier corresponding to the representative port number;

and placing the pilot frequency position configuration difference value in the downlink control information.

An embodiment of the present invention further provides a network side device, where the network side device includes:

the acquisition module is used for acquiring the port number and/or the DMRS pilot frequency position configuration identifier corresponding to each resource block set RBG;

and the generating module is used for generating the downlink control information according to the acquired port number corresponding to the RBG and/or the DMRS pilot position configuration identifier.

Further, the generating module includes:

the first grouping unit is used for grouping the RBGs with the same port number into one group and establishing an RBG identification set of each group of RBGs;

the first sequencing unit is used for sequencing the port numbers corresponding to all RBGs in a descending order to obtain a port number set, wherein each port number in the port number set corresponds to an RBG identification set;

a first processing unit, configured to obtain the number X of RBG identifier sets that need to notify a user terminal in downlink control information, select the first X port numbers from the port number set, and merge RBG identifier sets corresponding to other port numbers except the first X port numbers into an RBG identifier set corresponding to the xth port number;

a first generating unit, configured to place the X port numbers and the corresponding RBG identifier sets in the downlink control information.

Further, the generating module includes:

the second sorting unit is used for sorting the RBG numbers corresponding to the same port number according to a descending order to obtain an RBG set;

a second processing unit, configured to obtain a number X of RBG identifier sets that need to be notified to a user terminal in downlink control information, select a first X number of RBGs from the RBG sets, determine a port number corresponding to the X number of RBGs, where the port number corresponding to an X-th number of RBGs is a maximum port number corresponding to other RBG numbers except for the first X-1 number of RBGs, and merge RBG identifiers corresponding to other RBG numbers except for the first X number of RBGs into an RBG identifier set corresponding to the X-th number of RBG identifiers;

and a second generating unit, configured to place the port number corresponding to the X RBGs and the RBG identifier set corresponding to the port number in the downlink control information.

Further, the generating module includes:

the second grouping unit is used for dividing all RBGs into X groups and taking the maximum value of the port numbers corresponding to the RBGs in each group as the port number corresponding to the RBGs in the group;

and a third generating unit, configured to place, in the downlink control information, the port number corresponding to each group of RBGs and the identifier set of each group of RBGs.

Further, the second grouping unit is specifically configured to equally divide all RBGs into X groups; or

Further, the second grouping unit is specifically configured to divide all the RBGs into X groups according to the size of the number of ports, where the number of ports corresponding to each group of RBGs belongs to the same value interval, and the value intervals corresponding to the number of ports corresponding to different groups of RBGs do not overlap.

Further, the generating module includes:

a third grouping unit, configured to divide all RBGs into a first group and a second group according to the number of OFDM symbols occupied by the DMRS pilot, where the number of OFDM symbols occupied by an RBG in the first group is 1, the number of OFDM symbols occupied by an RBG in the second group is 2, and a maximum value of the number of ports corresponding to each group of RBGs is used as the number of ports corresponding to the group of RBGs;

and the fourth generating unit is used for placing the port number corresponding to each group of RBGs and the identification set of each group of RBGs in the downlink control information.

Further, the generating module includes:

the fourth grouping unit is used for dividing all RBGs into X groups and acquiring the number of representative ports corresponding to the RBGs in each group;

the first calculating unit is used for calculating the difference value between the actual port number of each RBG and the corresponding representative port number of each RBG for each group of RBGs;

and a fifth generating unit, configured to place, in the downlink control information, the number of representative ports corresponding to each group of RBGs, the difference, and the identifier set of each group of RBGs.

Further, the generating module includes:

the second calculation unit is used for acquiring the number of representative ports corresponding to all RBGs;

a sixth generating unit, configured to place the representative port numbers of all RBGs in the downlink control information.

Further, when the port number corresponding to the RBG does not uniquely correspond to a DMRS pilot position configuration identifier, the network side device further includes:

the third calculating unit is used for calculating a pilot position configuration difference value between the DMRS pilot position configuration identifier corresponding to the actual port number of each RBG in each group and the DMRS pilot position configuration identifier corresponding to the representative port number;

the fifth generating unit is further configured to place the pilot position configuration difference in the downlink control information.

The embodiment of the invention also provides network side equipment, 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, when executing the computer program, implements the steps in the method as described above.

Embodiments of the present invention also provide a computer-readable storage medium for storing a computer program, where the computer program, when executed by a processor, implements the steps in the method as described above.

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

in the above scheme, the network side device generates downlink control information according to at least one of the port number corresponding to each RBG and the DMRS pilot position configuration identifier, and notifies the DMRS configuration information to the user terminal through the downlink control information, so that the user terminal can acquire the DMRS configuration information after receiving the downlink control information, and then perform information detection and demodulation according to the corresponding DMRS pilot pattern.

Drawings

Fig. 1 is a schematic diagram of DMRS resources of a downlink subframe of an LTE system;

fig. 2-5 are DMRS pilot patterns;

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

fig. 7-8 are block diagrams of network side devices according to embodiments of the present invention.

Detailed Description

The following detailed description of embodiments of the present invention will be made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

The invention provides a downlink control information indication method and network side equipment, which can inform user terminals of DMRS configuration information under a new air interface so that the user terminals can acquire allocated port resources.

An embodiment of the present invention provides a downlink control information indication method, which is applied to a network side device, and as shown in fig. 1, the method includes:

101, acquiring the port number and/or DMRS pilot frequency position configuration identification corresponding to each resource block set RBG;

and 102, generating downlink control information according to the acquired port number corresponding to the RBG and/or the DMRS pilot position configuration identifier.

Further, after generating the downlink control information, the network side device may send the downlink control information to the user terminal. The network side device may be a base station or a centralized node.

In this embodiment, the network side device generates downlink control information according to at least one of the number of ports corresponding to each RBG and the DMRS pilot position configuration identifier, and notifies the user terminal of the DMRS configuration information through the downlink control information, so that the user terminal can acquire the DMRS configuration information after receiving the downlink control information, and then perform information detection and demodulation according to the corresponding DMRS pilot pattern.

The following describes the downlink control information indication method of the present invention in detail with reference to specific embodiments:

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

And meanwhile, MU-MIMO is required to be supported, and respective occupied resources are distributed according to the traffic demands of different users, so that the difference of the number of users multiplexed on different RBG resources and the difference of the total number of ports can occur. However, the number of selectable ports is generally less than the number of RBG resources, so that there may be a plurality of RBG indexes (identifiers) corresponding to each number of ports, and the number of ports described in the present invention refers to the total number of ports of all users on the resource.

Let index of RBG resource be

Corresponding port number of

I.e. index is r₁The number of ports corresponding to the RBG of (1) is p₁Index is r₂The number of ports corresponding to the RBG of (1) is p₂And so on. The port number has different value ranges according to different DMRS configurations, assuming DMRS configuration1, the value range of the port number is {2,3, …,8}, assuming DMRS configuration2, the value range of the port number is {2,3, …,12}, and the port number is calculated according to the DMRS configuration

And merging, merging the same port number into one, and merging the corresponding RBG indexes into one group, namely the port numbers corresponding to all the RBG indexes in the group are the same. Counting RBG index corresponding to the same port number, and assuming that the combined port number is N combinations, the value of the corresponding port number is p ∈ { p'₁,p'₂,…,p'_NN-th maximum port number p_nThe corresponding RBG index set is r_nIs a

A subset of r_nSubset size R_n。

In a first specific embodiment, the step of generating the downlink control information includes:

dividing RBGs with the same port number into a group, and establishing an RBG index set of each group of RBGs;

sequencing the port numbers corresponding to all RBGs in a descending order to obtain a port number set, wherein each port number in the port number set corresponds to one RBG index set;

acquiring the number X of RBG index sets needing to be notified to a user terminal in downlink control information, selecting the number of the first X ports from the port number set, and merging RBG index sets corresponding to other port numbers except the number of the first X ports into an RBG index set corresponding to the number of the Xth port;

and placing the X port numbers and the corresponding RBG index set in the downlink control information.

In one embodiment, the port numbers on all RBG resources are sorted from large to small to be { p'_max,1,p'_max,2,…,p'_max,NN-th port number p'_max,nThe corresponding RBG index set is r_max,n. Determining the number X of RBG index sets needing to be notified to the user terminal in the DCI information, wherein X is an integer greater than 1, and the number X is selected from the set { p'_max,1,p'_max,2,…,p'_max,NThe first X port numbers are selected, and the corresponding value is { p'_max,1,p'_max,2,…,p'_max,XH, wherein the Xth port number p'_max,XThe corresponding RBG index is { p'_max,X,p'_max,X-1,…,p'_max,NR corresponding RBG index set r_max,X,r_max,X+1,…,r_max,NAnd then placing the first X port numbers and the corresponding RBG index set in the downlink control information.

In this embodiment, the bit overhead required for transmitting the port number and the RBG index is:

x is the number of the ports determined to be notified to the user terminal, and supposing that the maximum support is 4, namely {1,2,3,4}, can be represented by xbits, and the number of RBGs of the total allocated resources is Y and can be represented by ybits.

Suppose X is 4; according to the NR, each carrier supports up to 400MHz at maximum, the maximum number of subcarriers is 3300 or 6600, so the number of PRBs that need to be supported is 6600/12-550, if one RBG is Z PRBs, and if Z is 1, then the maximum 550 RBGs need to be supported, which is expressed by 10bits, that is, x is 2bits, y is 10bits, and the bit number of the port number p is 4. The total bit overhead is X + X (p + y) ═ 58 bits.

In a specific embodiment, the step of generating the downlink control information includes:

acquiring the number X of RBG index sets needing to be notified to a user terminal in downlink control information, selecting the number of the first X RBGs from the RBG sets, determining the number of ports corresponding to the number of the X RBGs, wherein the number of the ports corresponding to the number of the X RBGs is the maximum number of ports corresponding to the number of other RBGs except the number of the first X-1 RBGs, and merging the RBG indexes corresponding to the number of other RBGs except the number of the first X RBGs into the RBG index set corresponding to the number of the X RBGs;

and placing the port number corresponding to the X RBG numbers and the RBG index set corresponding to the port number in the downlink control information.

In one embodiment, the number of RBGs { R ] corresponding to the same port number₁,R₂,…,R_NThe data are sorted from big to small into R_max,1,R_max,2,…,R_max,NAnd the port number corresponding to each RBG number is { p'_max,1,p'_max,2,…,p'_max,N}。

Determining the number X of RBG index sets needing to be notified to the user terminal in the DCI, and selecting the set { R }_max,1,R_max,2,…,R_max,NSelecting the number of the first X RBGs, wherein the corresponding port number is { p'_max,1,p'_max,2,…,p'_max,XUpdating the number of the X-th RBG into a set of RBG indexes { R }_max,X,R_max,X+1,…,R_max,NR corresponding RBG index set r_max,X,r_max,X+1,…,r_max,NTotal of (a), p'_max,XUpdate to { p'_max,X,p'_max,X+1,…,p'_max,NMaximum of all port numbers in.

In a third specific embodiment, the step of generating the downlink control information includes:

and placing the port number corresponding to each group of RBGs and the index set of each group of RBGs in the downlink control information.

Further, the dividing all RBGs into X groups includes:

dividing all RBGs into X groups; or

dividing all RBGs into X groups according to the size of the port number, wherein the port number corresponding to each group of RBGs belongs to the same value interval, and the value intervals corresponding to the port numbers corresponding to different groups of RBGs are not overlapped. In one embodiment, the index of the RBG resource is

Dividing all RBG resources into X groups, wherein X is an integer greater than 1, and can be uniformly grouped or grouped according to port number distribution corresponding to each RBG index, for example, RBG indexes with larger port number difference can be divided into smaller groups, and RBG indexes with smaller port number difference can be divided into larger groupsThe group (2).

And in each group, selecting the maximum value of the port numbers corresponding to all RBG indexes in the group as the port number determined by the group.

x is the number of RBG resources determined to be notified to the user terminal, and the maximum support is 4, namely {1,2,3,4}, which can be expressed by xbits, and the number of RBG resources allocated in total is Y.

Suppose X is 4; the RBG resource groups are uniformly divided into 4 RBG resource groups, namely x is 2bits, and the bit number of the port number p is 4. The total bit overhead is X + X p ═ 18 bits.

In a fourth specific embodiment, the grouping is performed according to the number of OFDM symbols occupied by the DMRS pilot, and the step of generating the downlink control information includes:

x is the number of resource groups determined to be notified to the user terminal, is fixed to 2, the number of the groups does not need bit overhead, and the RBG number of the total allocated resources is Y and can be represented by ybits.

According to the NR, each carrier supports up to 400MHz at maximum, the maximum number of subcarriers is 3300 or 6600, so the number of PRBs that need to be supported is 6600/12-550, if one RBG is Z PRBs, and if Z is 1, then the maximum 550 RBGs need to be supported, which is expressed by 10bits, that is, y is 10bits, and the bit number of the port number p is 4. The total bit overhead is X (p + y) ═ 28 bits.

In a fifth specific embodiment, the step of generating the downlink control information includes:

and placing the number of representative ports corresponding to each group of RBGs, the difference value and the index set of each group of RBGs in the downlink control information.

For example, the index of the RBG resource is

Dividing all RBG resources into X groups, wherein X is an integer greater than 1, each group can be uniformly divided, and a uniform port number corresponding to all RBG resources in each group is obtained, and the port number P is_0,xThe maximum value, the average value, the minimum value or the port number corresponding to the maximum RBG of all RBGs in the group, and the like. If X takes 1, the RBG resources are not grouped, and one port number is generated uniformly.

Calculating the actual port number and P for all RBG resources in each group₀The difference Δ P between them, based on two parameters P_0,xAnd Δ p_xTo obtain DCI information.

x is the number of RBG resources determined to be notified to the user terminal, and supposing that the maximum support is 4, namely {1,2,3,4}, can be represented by xbits, and the number of RBGs of the total allocated resources is Y and can be represented by ybits.

Suppose X is 4; dividing into 4 RBG resource groups, i.e. x is 2bits, y is 8bits, and the number of ports P₀The number of bits of (d) is 4, the number of bits of Δ p is 4, and the total bit overhead is X + X (p + deltap) 34 bits. A specific mapping relationship may also be given to reduce the bit overhead, for example, 2-bit labeling may be adopted, and the total bit overhead is X + X (p + deltap) ═ 28 bits.

Meanwhile, the total bit overhead X + X p ═ 18bits do not need to be updated in real time, and can be sent to the terminal in a certain period.

And informing the user terminal of the 16bits in real time. Compared with the third embodiment, the number of bits for real-time update is less.

In a sixth specific embodiment, the step of generating the downlink control information includes:

acquiring the number of representative ports corresponding to all RBGs;

In this embodiment, a port number is obtained directly according to all the allocated RBG resources of the full bandwidth, which may be a maximum value, an average value, a minimum value of the port numbers corresponding to all the RBGs, or a maximum port number corresponding to the RBGs, or the like. All resources report a uniform port number.

In this embodiment, the bit overhead required for transmitting the DMRS configuration information is only port number overhead, which is 4 bits.

Detailed description of the preferred embodiment

In the first to sixth specific embodiments, all of the above embodiments are directed to a case where the number of ports corresponding to the RBG uniquely corresponds to one DMRS pilot position configuration index, and further, when the number of ports corresponding to the RBG does not uniquely correspond to one DMRS pilot position configuration index, the method further includes:

calculating a pilot position configuration difference value between a DMRS pilot position configuration index corresponding to the actual port number of each RBG in each group and a DMRS pilot position configuration index corresponding to the representative port number;

For example, on the basis of the fifth specific embodiment, if the DMRS configuration corresponding to the actual port number is not unique, that is, there are multiple DMRS pilot position combinations, the DMRS pilot position configuration index and P corresponding to the actual port number may be calculated₀The difference between the corresponding DMRS pilot position configuration indexes may also beAnd generating DCI information by directly notifying the DMRS pilot frequency position configuration index corresponding to the actual port number, and notifying the user terminal.

Examples are:

in the DMRS pattern of fig. 4, if DMRS is required to be configured with 4 ports, the DMRS may be configured with port0/1/2/3, port0/1/4/5, or port2/3/4/5, and if two MU-MIMO users are scheduled at the same time, 2 ports are configured respectively. For a user terminal, the DCI information determines to notify the positions of two ports, and assuming that the notification is port0/1, in addition to DMRS configuration information of the user terminal, if only notifying the total number of ports is 4, the user terminal cannot know from the information whether an occupied DMRS pilot position is port0/1/2/3 or port0/1/4/5, that is, a DMRS configuration corresponding to the actual number of ports 4 is not unique, and a DMRS pilot position configuration index corresponding to the actual number of ports needs to be given.

Suppose X is 4; and dividing the resource groups into 4 RBG resource groups, namely x is 2bits, DMRS configuration index is m bits, and m is assumed to be 7 bits. The total bit overhead is X + X m-30 bits. If the information of the packet number X is notified in another configuration manner (for example, through a Group common PDCCH (Physical Downlink Control Channel), or through system broadcast, or through semi-static or static configuration such as other Control channels), the information bit number notified in real time here is X m — 28 bits.

In addition, the bit overhead described in the first to seventh embodiments further needs to be added with DMRS configuration information of the user terminal, which is denoted by n bits, and assuming that n is 7 bits, the DMRS configuration overhead of the user terminal is 7 bits.

An embodiment of the present invention further provides a network side device, and as shown in fig. 7, the network side device includes:

an obtaining module 21, configured to obtain the port number and/or DMRS pilot position configuration identifier corresponding to each resource block set RBG;

and the generating module 22 is configured to generate the downlink control information according to the acquired port number and/or DMRS pilot position configuration identifier corresponding to the RBG.

In a specific embodiment, the generating module includes:

In a specific embodiment, when the number of ports corresponding to an RBG does not uniquely correspond to a DMRS pilot position configuration identifier, the network side device further includes:

It should be noted that the network side device provided in the embodiment of the present invention is a network side device capable of correspondingly implementing the method embodiment, so that all embodiments of the downlink control information indication method provided in the method embodiment can be correspondingly applied to the network side device, and can achieve the same or similar beneficial effects.

In addition, functional modules in the embodiments of the present invention may be integrated into one processing module, or each module may be physically included alone, or two or more modules may be integrated into one module. The integrated module can be realized in a hardware form, and can also be realized in a form of hardware and a software functional module.

An embodiment of the present invention further provides a network side device, as shown in fig. 8, including:

the processor 1100, which reads the program in the memory 1120, performs the following processes:

Further, the network side device further includes a transceiver 1111,

the processor 1100, further configured to read the program in the memory 1120, performs the following processes: transmit downlink control information through the transceiver 1111;

a transceiver 1111 for transmitting downlink control information under the control of the processor 1100.

Where in fig. 8, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1100, and various circuits, represented by memory 1120, 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 1111 may be a plurality of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1100 in performing operations.

The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1100 in performing operations.

The processor 1100 is also adapted to read the computer program and perform the following steps:

dividing all RBGs into X groups; or

acquiring the number of representative ports corresponding to all RBGs;

Further, when the port number corresponding to the RBG does not uniquely correspond to a DMRS pilot position configuration identifier, the processor 1100 is further configured to read the computer program, and perform the following steps:

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:

Further, the program when executed by the processor further performs the steps of:

dividing all RBGs into X groups; or

acquiring the number of representative ports corresponding to all RBGs;

Further, when the port number corresponding to the RBG does not uniquely correspond to a DMRS pilot position configuration identifier, the program when executed by the processor further implements the following steps:

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

While the foregoing is directed to the preferred embodiment of the present invention, 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 as defined in the appended claims.

Claims

1. A downlink control information indication method is applied to a network side device, and is characterized in that the method comprises the following steps:

2. The method according to claim 1, wherein the step of generating the downlink control information comprises:

3. The method according to claim 1, wherein the step of generating the downlink control information comprises:

4. The method according to claim 1, wherein the step of generating the downlink control information comprises:

5. The downlink control information indicating method of claim 4, wherein the dividing all RBGs into X groups comprises:

dividing all RBGs into X groups; or

6. The method of claim 5, wherein the dividing all RBGs into X groups according to the number of ports corresponding to the RBGs comprises:

7. The method according to claim 1, wherein the step of generating the downlink control information comprises:

8. The method according to claim 1, wherein the step of generating the downlink control information comprises:

placing the number of representative ports corresponding to each group of RBGs, the difference value and the identification set of each group of RBGs in the downlink control information;

the representative port number is the maximum value, the minimum value, the average value or the port number corresponding to the maximum RBG of the port numbers corresponding to the RBGs in each group.

9. The method according to claim 1, wherein the step of generating the downlink control information comprises:

acquiring the number of representative ports corresponding to all RBGs;

10. The downlink control information indication method according to claim 9,

the representative port number is the maximum value, the minimum value, the average value or the port number corresponding to the maximum RBG of the port numbers corresponding to all the RBGs.

11. The method for indicating downlink control information according to claim 8, wherein when the number of ports corresponding to an RBG does not uniquely correspond to a DMRS pilot position configuration identifier, the method further comprises:

12. A network side device, wherein the network side device comprises:

13. The network-side device of claim 12, wherein the generating module comprises:

14. The network-side device of claim 12, wherein the generating module comprises:

15. The network-side device of claim 12, wherein the generating module comprises:

16. The network-side device of claim 15,

the second grouping unit is specifically used for equally dividing all RBGs into X groups; or

17. The network-side device of claim 16,

the second grouping unit is specifically used for dividing all RBGs into X groups according to the size of the port number, the port number corresponding to each group of RBGs belongs to the same value interval, and the value intervals corresponding to the port numbers corresponding to different groups of RBGs are not overlapped.

18. The network-side device of claim 12, wherein the generating module comprises:

19. The network-side device of claim 12, wherein the generating module comprises:

a fifth generating unit, configured to place, in the downlink control information, the number of representative ports corresponding to each group of RBGs, the difference, and the identifier set of each group of RBGs;

20. The network-side device of claim 12, wherein the generating module comprises:

21. The network-side device of claim 20,

22. The network-side device of claim 19, wherein when the port number corresponding to the RBG does not uniquely correspond to a DMRS pilot position configuration identifier, the network-side device further comprises:

23. A network-side device comprising a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; characterized in that the processor realizes the steps in the method according to any one of claims 1 to 11 when executing the computer program.

24. A computer-readable storage medium for storing a computer program, wherein the computer program, when executed by a processor, implements the steps in the method according to any one of claims 1 to 11.