CN109150472B

CN109150472B - Sending method and receiving method of demodulation reference signal, terminal and network side equipment

Info

Publication number: CN109150472B
Application number: CN201710466218.XA
Authority: CN
Inventors: 李娜
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2017-06-19
Filing date: 2017-06-19
Publication date: 2021-03-09
Anticipated expiration: 2037-06-19
Also published as: CN109150472A

Abstract

The invention provides a sending method, a receiving method, a terminal and network side equipment for a demodulation reference signal. The sending method comprises the following steps: determining auxiliary information to be transmitted; determining a demodulation reference signal corresponding to the auxiliary information according to the corresponding relation between the preset auxiliary information and the demodulation reference signal; and sending the demodulation reference signal to a terminal through a downlink control channel. The sending method, the receiving method, the terminal and the network side device for the demodulation reference signal of the downlink control channel provided by the embodiment of the invention realize the transmission of the demodulation reference signal of the downlink control channel and can transmit the auxiliary information to the terminal by using the demodulation reference signal.

Description

Sending method and receiving method of demodulation reference signal, terminal and network side equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a sending method, a receiving method, a terminal, and a network side device for a demodulation reference signal.

Background

In the design of a new air interface (NR) system, a single-port transmission diversity scheme is adopted for a new air interface physical downlink control channel (NR-PDCCH), instead of a two-port transmission diversity scheme adopted for a Long Term Evolution (LTE) system, and the NR-PDCCH supports a resource block set (REG bundling per CCE) for improving the performance of channel estimation. Ports herein are all referred to as antenna ports.

Demodulation reference signals (DMRSs) of the NR-PDCCH are mainly used for coherent demodulation of the NR-PDCCH. In the NR present phase discussion, in the time domain, DMRS may be mapped on some or all of the Orthogonal Frequency Division Multiplexing (OFDM) symbol resources of the NR-PDCCH; in the frequency domain, the DMRS may be resource mapped in units of resource block groups (REGs) or resource block set (REG bundle). In order to support multi-user multiplexing, DMRS design of NR-PDCCH mainly has two ways of Code Division Multiplexing (CDM) and Frequency Division Multiplexing (FDM) to satisfy that DMRSs of different antenna ports are orthogonal to each other. The FDM method is divided into power boosting (power boosting) and no-power boosting.

Currently, it has been determined to employ a single-port transmission diversity scheme with respect to transmission of demodulation reference signals for downlink control channels in NR systems. On this basis, the invention provides a scheme for transmitting a demodulation reference signal of a downlink control channel, which transmits auxiliary information to a terminal by using the demodulation reference signal so as to assist the terminal to receive and process a downlink control/data channel, reduce the receiving complexity of the downlink control channel/shared channel and improve the receiving performance of the control channel/shared channel.

Disclosure of Invention

Embodiments of the present invention provide a sending method, a receiving method, a terminal and a network side device for demodulation reference signals, which implement transmission of demodulation reference signals of a downlink control channel and can transmit auxiliary information to the terminal by using the demodulation reference signals.

In a first aspect, an embodiment of the present invention provides a method for sending a demodulation reference signal of a downlink control channel, which is applied to a network side device, and the method includes: determining first auxiliary information to be transmitted; determining a demodulation reference signal corresponding to the first auxiliary information according to a corresponding relation between predetermined auxiliary information and the demodulation reference signal; and sending the demodulation reference signal corresponding to the first auxiliary information to a terminal through a downlink control channel.

In a second aspect, an embodiment of the present invention provides another method for receiving a demodulation reference signal of a downlink control channel, where the method is applied to a terminal, and the method includes: detecting a demodulation reference signal sent by a network side device through a downlink control channel to obtain a detected demodulation reference signal; and determining first auxiliary information corresponding to the detected demodulation reference signal according to the corresponding relation between the preset auxiliary information and the demodulation reference signal.

In a third aspect, an embodiment of the present invention further provides a network side device, where the network side device includes:

the first determining module is used for determining first auxiliary information to be transmitted;

a second determining module, configured to determine, according to a correspondence between predetermined auxiliary information and a demodulation reference signal, a demodulation reference signal corresponding to the first auxiliary information;

and the sending module is used for sending the demodulation reference signal corresponding to the first auxiliary information to the terminal through a downlink control channel.

In a fourth aspect, an embodiment of the present invention further provides another network-side device, including: a memory, a processor and a computer program stored on the memory and operable on the processor, the computer program, when executed by the processor, implementing the steps of the method for transmitting a demodulation reference signal of a downlink control channel of an application network side device as described above.

In a fifth aspect, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when being executed by a processor, the computer program implements the steps of the method for transmitting a demodulation reference signal applied to a downlink control channel of a network-side device, as described above.

In a sixth aspect, an embodiment of the present invention further provides a terminal, where the terminal includes:

the detection module is used for detecting a demodulation reference signal sent by the network side equipment through a downlink control channel to obtain a detected demodulation reference signal;

and the information determining module is used for determining first auxiliary information corresponding to the detected demodulation reference signal according to the corresponding relation between the preset auxiliary information and the demodulation reference signal.

In a seventh aspect, an embodiment of the present invention further provides another terminal, where the terminal includes: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method for transmitting demodulation reference signals applied to a downlink control channel of a terminal as described above.

In an eighth aspect, 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 steps of the method for transmitting a demodulation reference signal applied to a downlink control channel of a terminal as described above.

Compared with the prior art, the sending method, the receiving method, the terminal and the network side device for the demodulation reference signal of the downlink control channel provided by the embodiment of the invention realize the transmission of the demodulation reference signal of the downlink control channel, and can transmit the auxiliary information to the terminal by using the demodulation reference signal.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a diagram illustrating an example of a DMRS position relationship in a downlink control channel according to an embodiment of the present invention;

fig. 2 is a diagram illustrating another example of a DMRS position relationship in a downlink control channel according to an embodiment of the present invention;

fig. 3 is a diagram of an example of an FDM multiplexed DMRS in the embodiment of the present invention;

fig. 4 is a flowchart illustrating a method for transmitting a demodulation reference signal according to an embodiment of the present invention;

fig. 5 is another flowchart of a method for transmitting a demodulation reference signal according to an embodiment of the present invention;

fig. 6 is a schematic flowchart of a method for transmitting a demodulation reference signal according to an embodiment of the present invention;

fig. 7A to 7C are schematic diagrams of example 1 of a demodulation reference signal configuration pattern according to an embodiment of the present invention;

fig. 8A to 8C are diagrams of example 2 of a demodulation reference signal configuration pattern according to an embodiment of the present invention;

fig. 9A to 9C are diagrams of example 3 of a demodulation reference signal configuration pattern according to an embodiment of the present invention;

fig. 10A to 10C are diagrams of example 4 of a demodulation reference signal configuration pattern according to an embodiment of the present invention;

fig. 11A to 11E are diagrams of example 5 of a demodulation reference signal configuration pattern according to an embodiment of the present invention;

fig. 12 is a flowchart illustrating a method for receiving a demodulation reference signal according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a network-side device according to an embodiment of the present invention;

fig. 14 is another schematic structural diagram of a network-side device according to an embodiment of the present invention.

Fig. 15 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 16 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. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

In various embodiments of the present invention, the downlink control channel may have different names for different communication protocol standards, for example, for an LTE system, the downlink control channel may be a PDCCH, and for a 5G system, the downlink control channel may be an NR-PDCCH.

Fig. 1 to 2 are exemplary diagrams illustrating possible position relationships of DMRSs in a downlink control channel according to embodiments of the present invention, and it should be noted that only some possible positions are illustrated here, and the position relationships of DMRSs are not limited to the above diagrams. Each minimum rectangular block in FIGS. 1-2 represents a resource block (RE), the horizontal axis represents time, the vertical axis represents frequency domain (subcarriers), and each column in the figure represents an OFDM symbol. Fig. 1 shows 4 examples of the positions of DMRSs on a downlink control channel of 1 symbol (OFDM symbol), and fig. 2 shows schematic diagrams of the positions of DMRSs on downlink control channels of 2 symbols and 3 symbols. DMRSs of different antenna ports (e.g., AP1 and AP2) may be mapped to different/same REs of the same symbol in a Frequency Division Multiplexing (FDM) manner or a Code Division Multiplexing (CDM) manner, so as to implement multi-terminal multiplexing, where the DMRSs of different antenna ports occupy different subcarrier positions in a frequency domain when the FDM manner is employed; when a CDM mode is adopted, the DMRSs of different antenna ports occupy the same subcarrier position on a frequency domain, and the mutual orthogonality of the DMRSs on the different antenna ports is ensured through Orthogonal Cover Codes (OCCs) on adjacent REs.

Fig. 3 further shows the FDM multiplexed DMRS from the perspective of antenna ports AP1 and AP2, where when the antenna port AP1 transmits the DMRS on a certain RE, the antenna port AP2 does not transmit information on the antenna port, i.e., keeps a silent state (i.e., a muting RE), and similarly, when the antenna port AP2 transmits the DMRS on a certain RE, the antenna port AP1 does not transmit information on the antenna port, i.e., keeps a silent state (i.e., a muting RE).

The sending method for the demodulation reference signal of the downlink control channel provided by the embodiment of the invention can utilize the demodulation reference signal to transmit the auxiliary information to the terminal when sending the demodulation reference signal, and the auxiliary information can be used for the subsequent process of the terminal, for example, can be used for receiving the downlink control channel, so as to reduce the receiving complexity of the downlink control channel and improve the receiving efficiency.

Referring to fig. 4, a method for sending a demodulation reference signal of a downlink control channel according to an embodiment of the present invention is applied to a network side device, and the method includes:

step 41, determining first auxiliary information to be transmitted.

Here, the auxiliary information may be information that facilitates subsequent flow processing of the terminal, and specifically may include at least one of the following information:

indication information of the time frequency resource position where the downlink control channel is located;

the size of the information bits carried in the downlink control channel;

aggregation level of a downlink control channel;

whether RE occupied by a demodulation reference signal of a second antenna port is used as indication information used by RE of a first antenna port for transmitting control information or not is determined, wherein the first antenna port is an antenna port corresponding to the terminal;

indication information of power enhancement of demodulation reference signals of a downlink control channel;

indication information of power enhancement of resource blocks (REs) of a downlink control channel;

indicating information indicating whether additional demodulation reference signals are added or not in the transmission of a Physical Downlink Shared Channel (PDSCH) in the time slot;

a reception start position of a Physical Downlink Shared Channel (PDSCH);

a reception end position of the PDSCH; and the number of the first and second groups,

a reception bandwidth of the PDSCH.

And step 42, determining the demodulation reference signal corresponding to the first auxiliary information according to the corresponding relation between the predetermined auxiliary information and the demodulation reference signal.

Here, as an implementation manner, a sequence cyclic shift value corresponding to the auxiliary information may be determined according to a predetermined correspondence relationship between the auxiliary information and the sequence cyclic shift value; and according to the sequence cyclic shift value, carrying out cyclic shift on the base sequence to obtain a demodulation reference signal. As another implementation manner, a phase rotation value of a demodulation reference signal corresponding to predetermined side information may be determined according to a corresponding relationship between the side information and the phase rotation value; and performing phase rotation on the first demodulation reference signal according to the phase rotation value to obtain a second demodulation reference signal.

And 43, sending the demodulation reference signal corresponding to the first auxiliary information to the terminal through a downlink control channel.

Here, the downlink control channel may adopt a single-port transmission diversity scheme, so that the demodulation reference signal corresponds to one antenna port, and the network side transmits the demodulation reference signal to the antenna port through the downlink control channel. For example, when the demodulation control signal corresponding to the first auxiliary information includes the first demodulation reference signal and the second demodulation reference signal, the first demodulation reference signal and the second demodulation reference signal may be sent to the terminal through a downlink control channel.

Through the above steps, the embodiment of the present invention implements the sending processing of the demodulation reference signal of the downlink control channel, and sends the specific demodulation reference signal in the sending process to implicitly send the auxiliary information to the terminal, and the terminal can obtain the corresponding auxiliary information after receiving the specific demodulation reference signal, so as to be used in the subsequent processing flow of the terminal, such as the flow of receiving the downlink control channel or the physical downlink shared channel, to reduce the complexity of the related processing flow and improve the processing performance.

In the above-mentioned flow, the implicitly transmitted auxiliary information may specifically be transmitted by using, for example, a sequence cyclic shift value corresponding to a sequence of the demodulation reference signal, or a phase difference (phase rotation value) between the first demodulation reference signal and the second demodulation reference signal.

Referring to fig. 5, a specific flow of transmitting auxiliary information by using a cyclic shift value of a sequence corresponding to a sequence of a demodulation reference signal in a method for transmitting a demodulation reference signal of a downlink control channel is shown in fig. 5, where the method for transmitting a demodulation reference signal of a downlink control channel is applied to a network side device, and includes:

step 51, determining first auxiliary information to be transmitted.

Here, the auxiliary information may be information that facilitates subsequent flow processing of the terminal, and specifically may include at least one of the following information: indication information of the time frequency resource position where the downlink control channel is located; the size of the information bits carried in the downlink control channel; aggregation level of a downlink control channel; whether RE occupied by a demodulation reference signal of a second antenna port is used as indication information used by RE of a first antenna port for transmitting control information or not is determined, wherein the first antenna port is an antenna port corresponding to the terminal; indication information of power enhancement of demodulation reference signals of a downlink control channel; indication information of power enhancement of resource blocks (REs) of a downlink control channel; indicating whether an additional demodulation reference signal is added for the Physical Downlink Shared Channel (PDSCH) transmission in the time slot; a receiving starting position of a physical downlink shared channel; a receiving end position of the physical downlink shared channel; and the receiving bandwidth of the physical downlink shared channel.

And step 52, determining a first sequence cyclic shift value corresponding to the first auxiliary information according to a corresponding relationship between predetermined auxiliary information and the sequence cyclic shift value, and performing cyclic shift on the base sequence according to the first sequence cyclic shift value to obtain a demodulation reference signal corresponding to the first auxiliary information.

Here, the embodiment of the present invention defines a correspondence between a cyclic shift value of a base sequence of a demodulation reference signal and auxiliary information in advance, and according to the correspondence, a sequence cyclic shift value corresponding to the auxiliary information to be transmitted can be determined, so as to perform cyclic shift on the base sequence, thereby obtaining the demodulation reference signal to be transmitted.

And step 53, sending the demodulation reference signal corresponding to the first auxiliary information to the terminal through a downlink control channel.

Through the above steps, the embodiment of the present invention implements the processing of sending the demodulation reference signal of the downlink control channel, and sends the specific demodulation reference signal in the sending process to implicitly send the auxiliary information to the terminal, and after receiving the specific demodulation reference signal, the terminal can obtain the cyclic shift value of the corresponding base sequence according to the demodulation reference signal, and further determine the auxiliary information corresponding to the cyclic shift value, so as to be used in the subsequent processing flow of the terminal, such as the flow of receiving the downlink control channel or PDSCH, to reduce the complexity of the related processing flow and improve the processing performance.

Referring to fig. 6, a specific flow of transmitting auxiliary information by using two types of demodulation reference signals with different phases in a method for transmitting demodulation reference signals of a downlink control channel is shown, as shown in fig. 6, the method for transmitting demodulation reference signals of a downlink control channel is applied to a network side device, and includes:

step 61, determining first auxiliary information to be transmitted.

Here, the auxiliary information may be information that facilitates subsequent flow processing of the terminal, and specifically may include at least one of the following information: indication information of the time frequency resource position where the downlink control channel is located; the size of the information bits carried in the downlink control channel; aggregation level of a downlink control channel; whether RE occupied by a demodulation reference signal of a second antenna port is used as indication information used by RE of a first antenna port for transmitting control information or not is determined, wherein the first antenna port is an antenna port corresponding to the terminal; indication information of power enhancement of demodulation reference signals of a downlink control channel; indication information of power enhancement of resource blocks (REs) of a downlink control channel; indicating whether additional demodulation reference signals are added for the transmission of the physical downlink shared channel in the time slot; a reception start position of a Physical Downlink Shared Channel (PDSCH); a reception end position of the PDSCH; and, a reception bandwidth of the PDSCH.

Step 62, determining a first phase rotation value of the demodulation reference signal corresponding to the first auxiliary information according to a corresponding relationship between predetermined auxiliary information and the phase rotation value, and performing phase rotation on the first demodulation reference signal according to the first phase rotation value to obtain a second demodulation reference signal.

And 63, sending the first demodulation reference signal and the second demodulation reference signal to the terminal through a downlink control channel.

Here, when an implementation that the phase difference between the demodulation reference signals is used to transmit the auxiliary information is adopted, an embodiment of the present invention may pre-configure a demodulation reference signal configuration pattern (pattern), where the configuration pattern defines a resource location relationship between the demodulation reference signals in a reference group and a comparison group, where the reference group and the comparison group each include at least one demodulation reference signal. Therefore, in step 63, resource locations of a reference group and a comparison group can be determined according to a predetermined demodulation reference signal configuration pattern, wherein the demodulation reference signal configuration pattern includes the reference group and the comparison group, and the reference group and the comparison group each include at least one demodulation reference signal; then, the first demodulation reference signal is transmitted at the resource position corresponding to the reference group, and the second demodulation reference signal is transmitted at the resource position corresponding to the comparison group.

Through the above steps, the embodiment of the present invention implements the sending processing of the demodulation reference signals of the downlink control channel, and sends the demodulation reference signals with different phases in the sending process to implicitly send the auxiliary information to the terminal, and after the terminal receives the demodulation reference signals with different phases, the terminal can determine the auxiliary information corresponding to the phase difference according to the phase difference between the two demodulation reference signals, so as to be used in the subsequent processing procedures of the terminal, such as the procedure of receiving the downlink control channel or the PDSCH, to reduce the complexity of the related processing procedures and improve the processing performance.

Several demodulation reference signal configuration modes that can be employed by the embodiments of the present invention are further described below with reference to fig. 7A to 11E. Each minimum rectangular block in fig. 7A to 11E represents one resource block (RE), the horizontal axis direction represents time, the vertical axis direction represents frequency domain (subcarrier), each column in the figure represents one OFDM symbol, and the dashed boxes in the figure represent REs to which demodulation reference signals after phase rotation are mapped.

The following description is based on the assumption that a downlink control channel occupies 1 or more OFDM symbols in time, DMRS is mapped on part or all of OFDM symbol resources of the downlink control channel, and the DMRS supports multi-user multiplexing in a CDM or FDM manner.

The downlink control channel occupies one or more OFDM symbols, and the DMRS of the downlink control channel is mapped on the one or more OFDM symbols by taking REG as a unit. The configuration mode design of the DMRS of the downlink control channel can support multi-user multiplexing by adopting a CDM or FDM mode. When the FDM method is adopted, in a certain port, 2 REs in each REG map DMRS demodulation reference signals.

Here, the demodulation reference signals in each resource block group (REG) or resource block group (REG bundle) of the downlink control channel may be grouped in advance, and divided into a reference group and a reference group, predefined phase rotations may be introduced to the demodulation reference signals of different groups, and the auxiliary information may be transmitted by using the demodulation reference signal symbols with different phase rotations. The terminal detects the side information by calculating a phase difference between two sets of demodulation reference signals.

Example 1:

in this example, the demodulation reference signal configuration pattern includes demodulation reference signals mapped on a plurality of REs of one OFDM symbol, and the control group includes demodulation reference signals mapped on a part of REs among the plurality of REs.

For example, the downlink control channel adopts a single port or FDM multi-user multiplexing mode. Referring to fig. 7A to 7C, the downlink control channel DMRS occupies 1 OFDM symbol, downlink control channel demodulation reference signals are mapped on 2 REs in each REG, and phase rotation is introduced to the downlink control channel demodulation reference signal on one RE, and phase rotation is not introduced to the demodulation reference signal on another RE, as shown in fig. 7A to 7C. Mapping downlink control channel demodulation reference signals on one OFDM symbol for transmitting the downlink control channel, wherein the downlink control channel demodulation reference signals are mapped on two REs (such as RE21 and RE81) of each REG, and phase rotation is not introduced on the demodulation reference signal symbols on one RE (such as RE21 and RE 81); phase rotation is introduced on demodulation reference signal symbols on another RE (e.g., RE 81).

Example 1-1: the phase rotation value is 0 or pi. Where a phase rotation of 0 may represent a transmission of bit 0 and a phase rotation of pi may represent a transmission of bit 1, or vice versa, i.e. a phase rotation of 0 represents a transmission of bit 1 and a phase rotation of pi represents a transmission of bit 0. The scheme can transmit 1-bit information by using demodulation reference signal phase rotation in each downlink control channel.

Examples 1 to 2: the phase rotation values are 0, pi/2, pi, 3 pi/2. Where a phase rotation of 0 may represent a transmitted bit of 00, a phase rotation of pi/2 represents a transmitted bit of 01, a phase rotation of pi represents a transmitted bit of 11, and a phase rotation of 3 pi/2 represents a transmitted bit of 10. The scheme transmits 2-bit information by using demodulation reference signal phase rotation in each downlink control channel.

Example 2:

in this example, the demodulation reference signal pattern includes demodulation reference signals mapped to a plurality of OFDM symbols, and at least 2 REs of each OFDM symbol have the demodulation reference signals mapped thereto, and the comparison group includes at least one group of the demodulation reference signals mapped to each OFDM symbol.

For example, the downlink control channel occupies a plurality of OFDM symbols, the downlink control channel demodulation reference signals are mapped on the plurality of downlink control channel OFDM symbols, the demodulation reference signals are divided into two groups according to the frequency domain position, phase rotation is introduced to one group of the demodulation reference signals, and phase rotation is not introduced to the other group.

Specifically, the downlink control channel adopts a single-port or FDM multi-user multiplexing mode. As shown in fig. 8A to 8C, demodulation reference signals are mapped on a plurality of OFDM symbols of a downlink control channel, a phase rotation is introduced on one of the demodulation reference signal symbols (e.g., RE81 and RE82) mapped on each OFDM symbol, and no phase rotation is introduced on the other demodulation reference signal symbol (e.g., RE21 and RE 22).

Example 2-1: as shown in fig. 8A to 8C, the phase rotation value is 0 or pi. Where a phase rotation of 0 represents a transmitted bit 0/1 and a phase rotation of π represents a transmitted bit 1/0. The scheme transmits 1-bit information by using reference signal phase rotation in each downlink control channel.

Example 2-1: as shown in FIGS. 8A to 8C, the phase rotation values are 0, π/2, π, 3 π/2. Where a phase rotation value of 0 may represent a transmitted bit of 00, a phase rotation of pi/2 represents a transmitted bit of 01, a phase rotation represents a transmitted bit of 11, and a phase rotation of 3 pi/2 represents a transmitted bit of 10. The scheme can transmit 2-bit information in each downlink control channel by using demodulation reference signal phase rotation.

Example 3:

the demodulation reference signal pattern comprises demodulation reference signals mapped on a plurality of OFDM symbols, at least 2 REs of each OFDM symbol are mapped with the demodulation reference signals, and the comparison group comprises at least one group of demodulation reference signals mapped on the same OFDM symbol.

For example, the downlink control channel occupies a plurality of OFDM symbols, the downlink control channel demodulation reference signals are mapped on the plurality of downlink control channel OFDM symbols, the demodulation reference signals are divided into two groups according to the time domain position, and phase rotation is introduced on one group of the demodulation reference signals.

Specifically, the downlink control channel adopts a single-port or FDM multi-user multiplexing mode. As shown in fig. 9A to 9C, the downlink control channel demodulation reference signals are mapped on a plurality of OFDM symbols of the downlink control channel, a phase rotation is introduced to demodulation reference signal symbols (e.g., RE21 and RE81) mapped on a part of the OFDM symbols (e.g., all in the figure), and no phase rotation is introduced to demodulation reference signal symbols mapped on another part of the OFDM symbols (e.g., RE22 and RE 82).

Example 3-2: the phase rotation value is 0 or pi. Where a phase rotation of 0 indicates a transmission bit of 0 and a phase rotation indicates a transmission bit of 1. The scheme transmits 1-bit information by using reference signal phase rotation in each downlink control channel.

Examples 3 to 3: the phase rotation values are 0, pi/2, pi, 3 pi/2. Where a phase rotation of 0 indicates a transmission bit of 00, a phase rotation of pi/2 indicates a transmission bit of 01, a phase rotation of pi indicates a transmission bit of 11, and a phase rotation of 3 pi/2 indicates a transmission bit of 10. The scheme transmits 2-bit information within each downlink control channel with reference signal phase rotation.

Example 4:

the demodulation reference signal pattern comprises demodulation reference signals mapped on a plurality of OFDM symbols, and at least 2 REs of each OFDM symbol are mapped with the demodulation reference signals, and the comparison group comprises at least one demodulation reference signal with a preset symbol position and a frequency domain position.

For example, the downlink control channel adopts a single port or FDM multi-user multiplexing mode. The downlink control channel occupies a plurality of OFDM symbols, the downlink control channel demodulation reference signal is mapped on the plurality of downlink control channel OFDM symbols, and phase rotation is introduced on part of the demodulation reference signals on part of the OFDM symbols.

As shown in fig. 10A to 10C, the downlink control channel demodulation reference signals are mapped on a plurality of OFDM symbols of the downlink control channel, a phase rotation is introduced to a part of the demodulation reference signals mapped on a part of the OFDM symbols (e.g., RE81), and no phase rotation is introduced to another part of the demodulation reference signals.

Example 4-1: the phase rotation value is 0 or pi. Where a phase rotation of 0 indicates a transmission bit of 0 and a phase rotation of pi indicates a transmission bit of 1. The scheme transmits 1-bit information by using reference signal phase rotation in each downlink control channel.

Example 4-2: the phase rotation values are 0, pi/2, pi, 3 pi/2. Where a phase rotation of 0 indicates a transmission bit of 00, a phase rotation of pi/2 indicates a transmission bit of 01, a phase rotation of pi indicates a transmission bit of 11, and a phase rotation of 3 pi/2 indicates a transmission bit of 10. The scheme transmits 2-bit information within each downlink control channel with reference signal phase rotation.

Example 5:

when the downlink control channel comprises demodulation reference signals of different terminals and the demodulation reference signals of the different terminals are multiplexed in a code division multiplexing mode in a time domain or a frequency domain, the demodulation reference signals multiplexed by the same group of orthogonal codes belong to the same contrast group or the same reference group.

As shown in fig. 11A to 11E, the downlink control channel supports multi-user multiplexing by using CDM. Different ports are distinguished by using different OCCs for two REs adjacent in frequency/time domain. In order not to destroy the orthogonal performance of OCCs, when the DMRS symbols of the downlink control channel are grouped in the manner of example 1/2/3/4, the DMRSs covering two REs in the same group of OCCs need to be grouped in basic units of OCCs, that is, the DMRSs covering the two REs in the same group of OCCs are either simultaneously phase-rotated or not phase-rotated. REs as in the dashed box in the figure need to be divided into the same group, as the control group, for phase rotation.

Example 5-1: the phase rotation value is 0 or pi. Where a phase rotation of 0 indicates a transmission bit of 0 and a phase rotation of pi indicates a transmission bit of 1. The scheme transmits 1-bit information by using reference signal phase rotation in each downlink control channel.

Example 5-2: the phase rotation values are 0, pi/2, pi, 3 pi/2. Where a phase rotation of 0 indicates a transmission bit of 00, a phase rotation of pi/2 indicates a transmission bit of 01, a phase rotation of pi indicates a transmission bit of 11, and a phase rotation of 3 pi/2 indicates a transmission bit of 10. The scheme transmits 2-bit information within each downlink control channel with reference signal phase rotation.

In this embodiment of the present invention, the auxiliary information may be information that is beneficial to subsequent process processing of the terminal, and specifically may include at least one of the following information, where it is to be noted that the following information is only an example, and the embodiment of the present invention may not be limited to the following information:

1) indication information of the time frequency resource position where the downlink control channel is located;

since the bit length of the auxiliary information is limited, and the time-frequency resource positions that can be indicated by the auxiliary information are relatively few, when the auxiliary information cannot completely cover each time-frequency position, a subset of the time-frequency resource positions where the downlink control channels are located can be indicated by the auxiliary information, each type of auxiliary information corresponds to a subset, and each subset includes the time-frequency resource positions where various types of downlink control channels are located.

2) The size of the information bits carried in the downlink control channel;

similarly, when the side information cannot completely cover the size of each information bit, a subset of the lengths of the information bits may be indicated with the side information, each type of side information corresponding to a subset, each subset including the lengths of the plurality of types of information bits.

3) Aggregation level of a downlink control channel;

similarly, when the side information cannot completely cover each aggregation level, a subset of the aggregation levels may be indicated with the side information, each side information corresponding to a subset, each subset including a plurality of aggregation levels.

4) Whether RE occupied by a demodulation reference signal of a second antenna port is used as indication information used by RE of a first antenna port for transmitting control information or not is determined, wherein the first antenna port is an antenna port corresponding to the terminal;

the indication information indicates whether the RE occupied by the DMRS of the other antenna port is used as the downlink control channel RE of the port, that is, the base station can transmit the downlink control information by using the resource of the position of the DMRS of the other antenna port, thereby reducing the code rate of the downlink control channel.

5) Indication information of power enhancement of demodulation reference signals of a downlink control channel;

the indication information indicates that the downlink control channel DMRS adopts power enhancement information, and the receiving end carries out corresponding processing during channel estimation according to the power enhancement information.

6) Indication information of power enhancement of resource blocks (REs) of a downlink control channel;

the indication information indicates that the downlink control channel RE transmission adopts the power enhancement information, and the receiving end performs corresponding processing during signal demodulation according to the power enhancement information.

7) Indicating information indicating whether additional demodulation reference signals are added or not in the transmission of a Physical Downlink Shared Channel (PDSCH) in the time slot;

the indication information indicates whether an additional DMRS is added to the PDSCH transmission in the slot so that the UE can receive and process the PDSCH.

8) A reception start position of a Physical Downlink Shared Channel (PDSCH);

the reception start position indicates a start position of the PDSCH so that the terminal receives and processes the PDSCH.

9) A reception end position of the PDSCH; and the number of the first and second groups,

the reception end position indicates an end position of the PDSCH so that the terminal receives and processes the PDSCH.

10) A reception bandwidth of the PDSCH.

It should be noted that, in the above example, the groups of DMRS symbols that are phase-rotated or not may have different grouping manners, a set of phase rotation values may include different phase rotation values, different phase rotation values correspond to transmitted bit information, and different cyclic shifted sequences correspond to transmitted bit information in other corresponding relationships.

The above describes the method for transmitting the demodulation reference signal according to the embodiment of the present invention from the network side, and the following describes the method for receiving the demodulation reference signal according to the embodiment of the present invention from the terminal side.

Referring to fig. 12, a method for receiving a demodulation reference signal of a downlink control channel according to an embodiment of the present invention is applied to a terminal, and the method includes:

step 121, detecting a demodulation reference signal sent by the network side device through the downlink control channel, and obtaining the detected demodulation reference signal.

Step 122, determining first auxiliary information corresponding to the detected demodulation reference signal according to a predetermined correspondence between auxiliary information for assisting downlink control channel reception and the demodulation reference signal.

Here, as an implementation manner, when the sequence cyclic shift value is used to represent the corresponding auxiliary information, in step 122, a first sequence cyclic shift value of a sequence corresponding to the detected demodulation reference signal relative to a base sequence may be determined; and then determining first auxiliary information corresponding to the first sequence cyclic shift value according to the corresponding relation between the preset auxiliary information and the sequence cyclic shift value.

As another implementation, the demodulation reference signal includes a first demodulation reference signal and a second demodulation reference signal having different phases; at this time, the phase difference between the demodulation reference signals is used to represent the corresponding auxiliary information, and in step 122, a first phase rotation value of the second demodulation reference signal relative to the first demodulation reference signal may be calculated; and determining first auxiliary information corresponding to the first phase rotation value according to the corresponding relation between the preset auxiliary information and the phase rotation value.

Through the steps, the embodiment of the invention can realize that the terminal receives the demodulation reference signal of the downlink control channel sent by the network and acquires the auxiliary information implicitly sent in the demodulation reference signal for the processing of the subsequent flow, thereby improving the performance of the processing of the subsequent flow.

When the demodulation reference signal includes a first demodulation reference signal and a second demodulation reference signal having different phases, in the step 121, resource locations of a reference group and a comparison group may be determined according to a predetermined demodulation reference signal configuration pattern, where the demodulation reference signal configuration pattern includes the reference group and the comparison group, and the reference group and the comparison group each include at least one demodulation reference signal; then, the first demodulation reference signal is detected at the resource position corresponding to the reference group, and the second demodulation reference signal is detected at the resource position corresponding to the comparison group.

Specifically, the demodulation reference signal configuration pattern may include demodulation reference signals mapped on multiple REs of one OFDM symbol, and the control group includes demodulation reference signals mapped on a part of REs in the multiple REs; alternatively, the first and second electrodes may be,

the demodulation reference signal pattern may include demodulation reference signals mapped to a plurality of OFDM symbols, and at least 2 REs of each OFDM symbol are mapped with the demodulation reference signals, and the control group includes at least one group of demodulation reference signals mapped to each OFDM symbol; alternatively, the first and second electrodes may be,

the demodulation reference signal pattern may include demodulation reference signals mapped on a plurality of OFDM symbols, and at least 2 REs of each OFDM symbol have demodulation reference signals mapped thereon, and the comparison group includes at least one group of demodulation reference signals mapped on the same OFDM symbol; alternatively, the first and second electrodes may be,

the demodulation reference signal pattern may include demodulation reference signals mapped on a plurality of OFDM symbols, and the demodulation reference signals are mapped on at least 2 REs of each OFDM symbol, and the control group includes at least one demodulation reference signal having a predetermined symbol position and frequency domain position.

Here, the assistance information includes at least one of the following information:

the size of the information bits carried in the downlink control channel;

aggregation level of a downlink control channel;

indication information of power enhancement of resource blocks (RE) of a downlink control channel;

receiving initial position of physical downlink shared channel PDSCH;

a reception end position of the PDSCH;

a reception bandwidth of the PDSCH.

The auxiliary information can improve the processing performance of the subsequent process of the terminal, for example, when the auxiliary information is the indication information of the time-frequency resource position where the downlink control channel is located, the blind detection complexity of the downlink control channel can be reduced, and the receiving end is favorable for receiving and processing the downlink control channel.

Based on the method, the embodiment of the invention also provides equipment for realizing the method.

An embodiment of the present invention provides a network-side device, where the network-side device may be a base station, and as shown in fig. 13, the network-side device 130 includes:

a first determining module 131, configured to determine first auxiliary information to be transmitted;

a second determining module 132, configured to determine, according to a correspondence between predetermined auxiliary information and a demodulation reference signal, a demodulation reference signal corresponding to the first auxiliary information;

a sending module 133, configured to send the demodulation reference signal corresponding to the first auxiliary information to the terminal through a downlink control channel.

As one implementation, the first determining module 131 includes:

a shift determining sub-module 1311, configured to determine, according to a corresponding relationship between predetermined auxiliary information and a sequence cyclic shift value, a first sequence cyclic shift value corresponding to the first auxiliary information;

the shift processing sub-module 1312 is configured to perform cyclic shift on the base sequence according to the cyclic shift value of the first sequence, so as to obtain a demodulation reference signal corresponding to the first auxiliary information.

As another implementation manner, the first determining module 131 includes:

a phase determining sub-module 1313, configured to determine, according to a corresponding relationship between predetermined auxiliary information and a phase rotation value, a first phase rotation value of the demodulation reference signal corresponding to the first auxiliary information;

and a phase rotation sub-module 1314, configured to perform phase rotation on the first demodulation reference signal according to the first phase rotation value, to obtain a second demodulation reference signal.

At this time, the sending module 133 is specifically configured to send the first demodulation reference signal and the second demodulation reference signal to the terminal through a downlink control channel.

Preferably, the sending module 133 includes:

a grouping determination submodule 1331, configured to determine resource locations of a reference group and a comparison group according to a predetermined demodulation reference signal configuration mode, where the demodulation reference signal configuration mode includes the reference group and the comparison group, and the reference group and the comparison group each include at least one demodulation reference signal;

a sending processing sub-module 1332, configured to send the first demodulation reference signal at the resource location corresponding to the reference group, and send the second demodulation reference signal at the resource location corresponding to the comparison group.

Preferably, the demodulation reference signal configuration pattern includes demodulation reference signals mapped on a plurality of REs of one OFDM symbol, and the control group includes demodulation reference signals mapped on a part of REs among the plurality of REs; alternatively, the first and second electrodes may be,

the demodulation reference signal pattern comprises demodulation reference signals mapped on a plurality of OFDM symbols, at least 2 REs of each OFDM symbol are mapped with the demodulation reference signals, and the comparison group comprises at least one group of demodulation reference signals mapped on each OFDM symbol; alternatively, the first and second electrodes may be,

the demodulation reference signal pattern comprises demodulation reference signals mapped on a plurality of OFDM symbols, at least 2 REs of each OFDM symbol are mapped with the demodulation reference signals, and the comparison group comprises at least one group of demodulation reference signals mapped on the same OFDM symbol; alternatively, the first and second electrodes may be,

Preferably, when the downlink control channel includes demodulation reference signals of different terminals and the demodulation reference signals of different terminals are multiplexed in a code division multiplexing manner in a time domain or a frequency domain, the demodulation reference signals multiplexed by using the same set of orthogonal codes belong to the same reference group or the same reference group.

Preferably, the auxiliary information includes at least one of the following information:

the size of the information bits carried in the downlink control channel;

aggregation level of a downlink control channel;

receiving initial position of physical downlink shared channel PDSCH;

a reception end position of the PDSCH;

a reception bandwidth of the PDSCH.

An embodiment of the present invention further provides a network side device, including: the method includes that the first demodulation reference signal is received from the first network side device, and the second demodulation reference signal is received from the second network side device, and the first demodulation reference signal is transmitted to the second network side device, and the second demodulation reference signal is transmitted to the first network side device.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process in the above-mentioned embodiment of the method for sending a demodulation reference signal applied to a network side device, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

Fig. 14 is a structural diagram of a network side device according to an embodiment of the present invention, which can implement the details of the above-described method for transmitting a demodulation reference signal applied to the network side device, and achieve the same effect. As shown in fig. 14, the network side device 1400 includes: a processor 1401, a transceiver 1402, a memory 1403, and a bus interface, wherein:

a processor 1401 for reading a program in the memory 1403, and performing the following processes: determining first auxiliary information to be transmitted; determining a demodulation reference signal corresponding to the first auxiliary information according to a corresponding relation between predetermined auxiliary information and the demodulation reference signal; and sending the demodulation reference signal corresponding to the first auxiliary information to a terminal through a downlink control channel.

In fig. 14, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1401, and various circuits, represented by memory 1403, 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 1402 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.

The processor 1401 is responsible for managing a bus architecture and general processing, and the memory 1403 may store data used by the processor 1401 in performing operations.

Optionally, the processor 1401 reads the program in the memory 1403, and is further configured to perform: determining a first sequence cyclic shift value corresponding to the first auxiliary information according to a corresponding relation between predetermined auxiliary information and a sequence cyclic shift value; and according to the first sequence cyclic shift value, performing cyclic shift on a base sequence to obtain a demodulation reference signal corresponding to the first auxiliary information.

Alternatively, the processor 1401 reads a program in the memory 1403, and executes the following processes:

determining a first phase rotation value of a demodulation reference signal corresponding to the first auxiliary information according to a corresponding relation between predetermined auxiliary information and a phase rotation value; according to the first phase rotation value, performing phase rotation on the first demodulation reference signal to obtain a second demodulation reference signal; and sending the first demodulation reference signal and the second demodulation reference signal to a terminal through a downlink control channel.

Alternatively, the processor 1401 reads a program in the memory 1403, and executes the following processes: determining resource positions of a reference group and a comparison group according to a predetermined demodulation reference signal configuration mode, wherein the demodulation reference signal configuration mode comprises the reference group and the comparison group, and the reference group and the comparison group respectively comprise at least one demodulation reference signal; and transmitting the first demodulation reference signal at the resource position corresponding to the reference group, and transmitting the second demodulation reference signal at the resource position corresponding to the comparison group.

Here, the demodulation reference signal configuration pattern includes demodulation reference signals mapped on a plurality of REs of one OFDM symbol, and the control group includes demodulation reference signals mapped on a part of REs among the plurality of REs; alternatively, the first and second electrodes may be,

The auxiliary information includes at least one of the following information:

the size of the information bits carried in the downlink control channel;

aggregation level of a downlink control channel;

receiving initial position of physical downlink shared channel PDSCH;

a reception end position of the PDSCH;

a reception bandwidth of the PDSCH.

The network side equipment of the embodiment of the invention implicitly sends the auxiliary information to the corresponding terminal when sending the demodulation reference signal, so that the terminal can obtain the auxiliary information for subsequent process processing, and the processing performance of the subsequent process is improved.

Referring to fig. 15, a terminal 150 according to an embodiment of the present invention includes:

a detecting module 151, configured to detect a demodulation reference signal sent by a network side device through a downlink control channel, and obtain the detected demodulation reference signal;

an information determining module 152, configured to determine first auxiliary information corresponding to the detected demodulation reference signal according to a predetermined correspondence between the auxiliary information and the demodulation reference signal.

Preferably, the information determining module 152 includes:

a first determining sub-module 1521, configured to determine a first sequence cyclic shift value of a sequence corresponding to the detected demodulation reference signal relative to a base sequence;

the second determining sub-module 1522 is configured to determine, according to a corresponding relationship between predetermined auxiliary information and a sequence cyclic shift value, first sequence auxiliary information corresponding to the first sequence cyclic shift value.

Preferably, the detected demodulation reference signals include a first demodulation reference signal and a second demodulation reference signal having different phases; the information determination module 152 includes:

a calculation sub-module 1523 for calculating a first phase rotation value of the second demodulation reference signal relative to the first demodulation reference signal;

the third determining sub-module 1524 is configured to determine, according to a predetermined correspondence between the auxiliary information and the phase rotation value, first auxiliary information corresponding to the first phase rotation value.

Preferably, the detection module 151 includes:

a position determining sub-module 1511, configured to determine resource positions of a reference group and a comparison group according to a predetermined demodulation reference signal configuration pattern, where the demodulation reference signal configuration pattern includes the reference group and the comparison group, and the reference group and the comparison group each include at least one demodulation reference signal;

the receiving sub-module 1512 is configured to detect the first demodulation reference signal at a resource location corresponding to the reference group, and detect the second demodulation reference signal at a resource location corresponding to the comparison group.

the size of the information bits carried in the downlink control channel;

aggregation level of a downlink control channel;

receiving initial position of physical downlink shared channel PDSCH;

a reception end position of the PDSCH;

a reception bandwidth of the PDSCH.

It should be noted that the terminal embodiment is a terminal corresponding to the above demodulation reference signal receiving method applied to the terminal side, and all implementations of the above embodiments are applicable to the terminal embodiment, and the same technical effects can be achieved.

An embodiment of the present invention further provides a terminal, including: the method includes that the terminal side performs the above-mentioned processes in the embodiment of the method for receiving demodulation reference signals, and the same technical effect can be achieved, and further details are not described here to avoid repetition.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process in the above-mentioned embodiment of the method for receiving a demodulation reference signal applied to a terminal side, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

Fig. 16 is a schematic structural diagram of a terminal according to another embodiment of the present invention. Specifically, the terminal 1600 in fig. 16 may be a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), or an in-vehicle computer.

The terminal 1600 in fig. 16 includes a power supply 1610, a memory 1620, an input unit 1630, a display unit 1640, a processor 1650, a wifi (wireless fidelity) module 1660, an audio circuit 1670, and an RF circuit 1680.

Input unit 1630 may be used, among other things, to receive user input information and to generate signal inputs related to user settings and function control of terminal device 1600. Specifically, in the embodiment of the present invention, the input unit 1630 may include a touch panel 1631. The touch panel 1631, also referred to as a touch screen, can collect touch operations of a user (e.g., operations of the user on the touch panel 1631 by using any suitable object or accessory such as a finger or a stylus) thereon or nearby, and drive the corresponding connection device according to a preset program. Alternatively, the touch panel 1631 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, and sends the touch point coordinates to the processor 1650, and can receive and execute commands sent by the processor 1650. In addition, the touch panel 1631 may be implemented by various types, such as resistive, capacitive, infrared, and surface acoustic wave. In addition to touch panel 1631, input unit 1630 may also include other input devices 1632, and other input devices 1632 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.

Among them, the display unit 1640 may be used to display information input by or provided to the user and various menu interfaces of the terminal device. The display unit 1640 may include a display panel 1641, and optionally, the display panel 1641 may be configured in the form of an LCD or an Organic Light-Emitting Diode (OLED).

It should be noted that the touch panel 1631 may cover the display panel 1641 to form a touch display screen, and when the touch display screen detects a touch operation on or near the touch display screen, the touch display screen is transmitted to the processor 1650 to determine the type of the touch event, and then the processor 1650 provides a corresponding visual output on the touch display screen according to the type of the touch event.

The touch display screen comprises an application program interface display area and a common control display area. The arrangement modes of the application program interface display area and the common control display area are not limited, and can be an arrangement mode which can distinguish two display areas, such as vertical arrangement, left-right arrangement and the like. The application interface display area may be used to display an interface of an application. Each interface may contain at least one interface element such as an icon and/or widget desktop control for an application. The application interface display area may also be an empty interface that does not contain any content. The common control display area is used for displaying controls with high utilization rate, such as application icons like setting buttons, interface numbers, scroll bars, phone book icons and the like.

The processor 1650 is a control center of the terminal device, connects various parts of the whole mobile phone by using various interfaces and lines, and executes various functions of the terminal device and processes data by running or executing software programs and/or modules stored in the first memory 1621 and calling data stored in the second memory 1622, thereby integrally monitoring the terminal device. Optionally, processor 1650 may include one or more processing units.

In an embodiment of the present invention, the processor 1650 is configured to, by invoking software programs and/or modules stored in the first memory 1621 and/or data stored in the second memory 1622: detecting a demodulation reference signal sent by a network side device through a downlink control channel to obtain a detected demodulation reference signal; and determining first auxiliary information corresponding to the detected demodulation reference signal according to a corresponding relation between preset auxiliary information for assisting downlink control channel reception and the demodulation reference signal.

Specifically, processor 1650 is also configured to: determining a first sequence cyclic shift value of a sequence corresponding to the detected demodulation reference signal relative to a base sequence; and determining first auxiliary information corresponding to the first sequence cyclic shift value according to the corresponding relation between the preset auxiliary information and the sequence cyclic shift value.

Specifically, the detected demodulation reference signals include a first demodulation reference signal and a second demodulation reference signal having different phases; processor 1650 is also configured to: calculating a first phase rotation value of the second demodulation reference signal relative to the first demodulation reference signal; and determining first auxiliary information corresponding to the first phase rotation value according to the corresponding relation between the preset auxiliary information and the phase rotation value.

Specifically, processor 1650 is also configured to: determining resource positions of a reference group and a comparison group according to a predetermined demodulation reference signal configuration mode, wherein the demodulation reference signal configuration mode comprises the reference group and the comparison group, and the reference group and the comparison group respectively comprise at least one demodulation reference signal; and detecting the first demodulation reference signal at the resource position corresponding to the reference group, and detecting the second demodulation reference signal at the resource position corresponding to the comparison group.

Specifically, the demodulation reference signal configuration pattern includes demodulation reference signals mapped on a plurality of REs of one OFDM symbol, and the control group includes demodulation reference signals mapped on a part of REs among the plurality of REs; alternatively, the first and second electrodes may be,

the size of the information bits carried in the downlink control channel;

aggregation level of a downlink control channel;

receiving initial position of physical downlink shared channel PDSCH;

a reception end position of the PDSCH;

a reception bandwidth of the PDSCH.

The terminal of the embodiment of the invention can acquire the auxiliary information implicitly sent by the network side from the demodulation reference signal issued by the network side equipment so as to be used for subsequent process processing and improve the processing performance of the subsequent process.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.

It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

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 as defined in the following claims.

Claims

1. A method for sending a demodulation reference signal of a downlink control channel is applied to a network side device, and is characterized in that the method comprises the following steps:

determining first auxiliary information to be transmitted;

determining a demodulation reference signal corresponding to the first auxiliary information according to a corresponding relation between predetermined auxiliary information and the demodulation reference signal;

sending a demodulation reference signal corresponding to the first auxiliary information to a terminal through a downlink control channel, wherein the first auxiliary information is used for assisting the terminal to receive the downlink control channel or a physical downlink shared channel;

the step of determining the demodulation reference signal corresponding to the first auxiliary information includes:

determining a first sequence cyclic shift value corresponding to the first auxiliary information according to a corresponding relation between predetermined auxiliary information and a sequence cyclic shift value;

and according to the first sequence cyclic shift value, performing cyclic shift on a base sequence to obtain a demodulation reference signal corresponding to the first auxiliary information.

2. The method of claim 1,

determining a first phase rotation value of a demodulation reference signal corresponding to the first auxiliary information according to a corresponding relation between predetermined auxiliary information and a phase rotation value;

according to the first phase rotation value, performing phase rotation on the first demodulation reference signal to obtain a second demodulation reference signal;

the step of sending the demodulation reference signal corresponding to the first auxiliary information to the terminal through the downlink control channel includes: and sending the first demodulation reference signal and the second demodulation reference signal to a terminal through a downlink control channel.

3. The method of claim 2, wherein the step of transmitting the first demodulation reference signal and the second demodulation reference signal to the terminal through a downlink control channel comprises:

determining resource positions of a reference group and a comparison group according to a predetermined demodulation reference signal configuration mode, wherein the demodulation reference signal configuration mode comprises the reference group and the comparison group, and the reference group and the comparison group respectively comprise at least one demodulation reference signal;

and transmitting the first demodulation reference signal at the resource position corresponding to the reference group, and transmitting the second demodulation reference signal at the resource position corresponding to the comparison group.

4. The method of claim 3,

the demodulation reference signal configuration pattern includes demodulation reference signals mapped on a plurality of REs of one OFDM symbol, and the control group includes demodulation reference signals mapped on a part of REs among the plurality of REs; alternatively, the first and second electrodes may be,

5. The method of claim 3,

6. The method according to any one of claims 1 to 5,

the auxiliary information includes at least one of the following information:

the size of the information bits carried in the downlink control channel;

aggregation level of a downlink control channel;

indicating information indicating whether additional demodulation reference signals are added in the physical downlink shared channel transmission in the time slot;

a receiving starting position of a physical downlink shared channel;

a receiving end position of the physical downlink shared channel;

and the receiving bandwidth of the physical downlink shared channel.

7. A method for receiving a demodulation reference signal of a downlink control channel is applied to a terminal, and is characterized in that the method comprises the following steps:

detecting a demodulation reference signal sent by a network side device through a downlink control channel to obtain a detected demodulation reference signal;

determining first auxiliary information corresponding to the detected demodulation reference signal according to a corresponding relation between predetermined auxiliary information and the demodulation reference signal, wherein the first auxiliary information is used for assisting a terminal to receive a downlink control channel or a physical downlink shared channel;

the step of determining the first auxiliary information corresponding to the detected demodulation reference signal includes:

determining a first sequence cyclic shift value of a sequence corresponding to the detected demodulation reference signal relative to a base sequence;

and determining first auxiliary information corresponding to the first sequence cyclic shift value according to the corresponding relation between the preset auxiliary information and the sequence cyclic shift value.

8. The method according to claim 7, wherein the detected demodulation reference signals include a first demodulation reference signal and a second demodulation reference signal having different phases;

calculating a first phase rotation value of the second demodulation reference signal relative to the first demodulation reference signal;

and determining first auxiliary information corresponding to the first phase rotation value according to the corresponding relation between the preset auxiliary information and the phase rotation value.

9. The method according to claim 8, wherein the step of detecting the demodulation reference signal transmitted by the network side device through the downlink control channel comprises:

and detecting the first demodulation reference signal at the resource position corresponding to the reference group, and detecting the second demodulation reference signal at the resource position corresponding to the comparison group.

10. The method of claim 9,

11. The method of claim 9,

12. The method according to any one of claims 7 to 11,

the auxiliary information includes at least one of the following information:

the size of the information bits carried in the downlink control channel;

aggregation level of a downlink control channel;

receiving initial position of physical downlink shared channel PDSCH;

a reception end position of the PDSCH;

a reception bandwidth of the PDSCH.

13. A network-side device, comprising:

a sending module, configured to send a demodulation reference signal corresponding to the first auxiliary information to a terminal through a downlink control channel, where the first auxiliary information is used to assist the terminal in receiving a downlink control channel or a physical downlink shared channel;

the first determining module includes:

the shift determining submodule is used for determining a first sequence cyclic shift value corresponding to the first auxiliary information according to the corresponding relation between the preset auxiliary information and the sequence cyclic shift value;

and the shift processing submodule is used for carrying out cyclic shift on the base sequence according to the first sequence cyclic shift value to obtain a demodulation reference signal corresponding to the first auxiliary information.

14. The network-side device of claim 13, wherein the first determining module comprises:

the phase determination submodule is used for determining a first phase rotation value of the demodulation reference signal corresponding to the first auxiliary information according to the corresponding relation between the preset auxiliary information and the phase rotation value;

the phase rotation submodule is used for performing phase rotation on the first demodulation reference signal according to the first phase rotation value to obtain a second demodulation reference signal;

the sending module is specifically configured to send the first demodulation reference signal and the second demodulation reference signal to a terminal through a downlink control channel.

15. The network-side device of claim 14, wherein the sending module comprises:

a grouping determination submodule, configured to determine resource locations of a reference group and a comparison group according to a predetermined demodulation reference signal configuration pattern, where the demodulation reference signal configuration pattern includes the reference group and the comparison group, and the reference group and the comparison group each include at least one demodulation reference signal;

and the sending processing submodule is used for sending the first demodulation reference signal at the resource position corresponding to the reference group and sending a second demodulation reference signal at the resource position corresponding to the comparison group.

16. The network-side device of claim 15,

17. The network-side device of claim 15,

18. The network-side device of any one of claims 13 to 17,

the auxiliary information includes at least one of the following information:

the size of the information bits carried in the downlink control channel;

aggregation level of a downlink control channel;

a receiving starting position of a physical downlink shared channel;

a receiving end position of the physical downlink shared channel;

and the receiving bandwidth of the physical downlink shared channel.

19. A network-side device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method for transmitting demodulation reference signals for downlink control channels according to any of claims 1 to 6.

20. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when executed by a processor, the computer program implements the steps of the method for transmitting demodulation reference signals of a downlink control channel according to any one of claims 1 to 6.

21. A terminal, comprising:

an information determining module, configured to determine, according to a correspondence between predetermined auxiliary information and a demodulation reference signal, first auxiliary information corresponding to the detected demodulation reference signal, where the first auxiliary information is used to assist a terminal in receiving a downlink control channel or a physical downlink shared channel;

the information determination module includes:

a first determining sub-module, configured to determine a first sequence cyclic shift value of a sequence corresponding to the detected demodulation reference signal relative to a base sequence;

and the second determining submodule is used for determining the first sequence auxiliary information corresponding to the first sequence cyclic shift value according to the corresponding relation between the preset auxiliary information and the sequence cyclic shift value.

22. The terminal of claim 21, wherein the detected demodulation reference signals comprise a first demodulation reference signal and a second demodulation reference signal with different phases; the information determination module includes:

a calculation sub-module for calculating a first phase rotation value of the second demodulation reference signal with respect to the first demodulation reference signal;

and the third determining submodule is used for determining first auxiliary information corresponding to the first phase rotation value according to the corresponding relation between the preset auxiliary information and the phase rotation value.

23. The terminal of claim 22, wherein the detection module comprises:

a position determining sub-module, configured to determine resource positions of a reference group and a comparison group according to a predetermined demodulation reference signal configuration pattern, where the demodulation reference signal configuration pattern includes the reference group and the comparison group, and the reference group and the comparison group each include at least one demodulation reference signal;

and the receiving submodule is used for detecting the first demodulation reference signal at the resource position corresponding to the reference group and detecting the second demodulation reference signal at the resource position corresponding to the comparison group.

24. The terminal of claim 23,

25. The terminal of claim 23,

26. The terminal according to any of the claims 21 to 25,

the auxiliary information includes at least one of the following information:

the size of the information bits carried in the downlink control channel;

aggregation level of a downlink control channel;

a receiving starting position of a physical downlink shared channel;

a receiving end position of the physical downlink shared channel;

and the receiving bandwidth of the physical downlink shared channel.

27. A terminal, comprising: memory, processor and computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method for transmitting demodulation reference signals for downlink control channels according to any of claims 7 to 12.

28. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when being executed by a processor, the computer program implements the steps of the method for transmitting demodulation reference signals of a downlink control channel according to any one of claims 7 to 12.