CN111052825B

CN111052825B - Channel demodulation method and related equipment

Info

Publication number: CN111052825B
Application number: CN201780094464.5A
Authority: CN
Inventors: 高东培; 罗亚军; 杨春磊; 朱永升; 张志强
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-09-15
Filing date: 2017-09-15
Publication date: 2022-03-25
Anticipated expiration: 2037-09-15
Also published as: CN111052825A; WO2019051796A1

Abstract

The embodiment of the application provides a channel demodulation method, which comprises the following steps: the method comprises the steps that user equipment receives configuration information sent by a first base station, wherein the configuration information comprises at least one format of added downlink control information; receiving a format of the downlink control information sent by the first base station; and acquiring a reference signal corresponding to the format of the downlink control information to perform channel estimation so as to demodulate a downlink physical shared channel. The resource overhead can be reduced and the gain can be improved.

Description

Channel demodulation method and related equipment

Technical Field

The present application relates to the field of wireless network technologies, and in particular, to a channel demodulation method and a related device.

Background

The LTE R10 protocol introduces Transmission Mode 9(Transmission Mode9, TM9), and aims to support higher-order Multiple-Input Multiple-Output (MIMO), support downlink single-user MIMO with maximum 8 streams, and improve the performance of downlink multi-user MIMO. R11 introduces TM10 for DL CoMP (Downlink Coordinated Multipoint Transmission) technology application, and enhances on the basis of TM 9. Both TM10 and TM9 use multiple reference signals: common Reference Signal (CRS), Demodulation Reference Signal (DMRS), and Channel State Information-Reference Signal (CSI-RS). CRS is a cell-level reference signal; DMRS is used for Channel estimation of a Physical Downlink Shared Channel (PDSCH), and CSI-RS is used for a terminal to acquire Channel State Information (CSI). Compared with the CRS, the CSI-RS can greatly reduce the time/frequency density and can support the spatial multiplexing of up to 8 layers.

To support DL CoMP, TM10 introduces sets of measurement configuration (CSI Process), Quasi co-located (QCL), VCID, and corresponding CSI feedback changes. Multiple sets of CSI processes are used to enhance DL CoMP measurement, and coordinate with multiple Transmission Processes (TPs) on the system side, such as Dynamic Point Selection (DPS), Joint Transmission (JT), Joint Scheduling/Beamforming (CS/CB), and improve Signal to Interference plus Noise Ratio (SINR) or Channel Quality Indicator (CQI) of an edge User Equipment (UE), thereby improving throughput of the edge UE. As the TP can be dynamically switched by CoMP, the equivalent channel estimation performance of the UE based on the DMRS can be improved by utilizing the DMRS and the CRS and the quasi-co-location relation between the CSI-RS, thereby improving the receiving performance of the UE. After the UE acquires the quasi-co-location information, the PDSCH may be demodulated by compensating for the DMRS through channel information obtained from the CRS and the CSI-RS.

However, the 2T/4T JT scheme of TM9 only supports 1 set of CSI measurements, and when JT user equipment falls back to independent scheduling, there is no corresponding CSI measurement, channel mismatch, it is difficult to guarantee demodulation performance, and DMRS in DCI 2C format brings 8% -16% overhead. In the 2T/4T JT/DPS scheme of TM10, when PDSCH is transmitted only in the serving cell, DMRS in DCI 2D format incurs 8% -16% overhead and engulfs the gain of JT/DPS.

Disclosure of Invention

The embodiment of the invention provides a channel demodulation method and related equipment, which can reduce the resource cost and improve the gain of JT/DPS.

In a first aspect, an embodiment of the present application provides a channel demodulation method, including: the user equipment firstly receives configuration information sent by a first base station, wherein the configuration information comprises at least one format of added downlink control information; then receiving the format of downlink control information sent by the first base station; and finally, acquiring a reference signal corresponding to the format of the downlink control information to carry out channel estimation so as to demodulate the downlink physical shared channel. By increasing the format of downlink control information, when the PDSCH is transmitted only in the serving cell or scheduled independently, DMRS overhead is eliminated and the gain of JT/DPS is increased.

In one possible design, the ue measures the channel state information according to a pre-configured first common reference signal and a channel state information reference signal; and sending channel state information to the first base station, wherein the channel state information is used for the base station to determine the format of the downlink control information. By adopting two sets of CSI measurements, when JT user equipment falls back to independent scheduling, corresponding CSI measurements exist, and demodulation performance is guaranteed.

In another possible design, the ue first receives a physical downlink control channel sent by a first base station; and then, performing blind detection on the physical downlink control channel to determine the format of the downlink control information.

In another possible design, when the format of the downlink control information is a first format, the ue receives a second common reference signal sent by the first base station to perform channel estimation to demodulate a downlink physical shared channel; and when the format of the downlink control information is the second format, the user equipment receives the demodulation reference signal sent by the first base station to carry out channel estimation so as to demodulate the downlink physical shared channel.

In another possible design, when the DCI format is 2/2a/1A, the UE receives the CRS transmitted by the base station for channel estimation, and then demodulates the PDSCH. And when the format of the DCI is 2C, the UE receives the DMRS sent by the base station for channel estimation, and then demodulates the PDSCH. Or, when the DCI format is 2/2a/1A, the UE receives the CRS transmitted by the base station to perform channel estimation, and further demodulates the PDSCH. And when the format of the DCI is 2D, the UE receives the DMRS sent by the base station for channel estimation, and then demodulates the PDSCH.

In another possible design, in the 2T/4T JT scheme of TM9, periodic CSI may be reported based on CRS measurement, and aperiodic CSI may be reported based on CSI-RS measurement. In a 2T/4T DPS or JT scheme of TM10, one CSI process is measured based on CRS, and the other CSI process is measured based on CSI-RS, and CSI reporting is respectively performed.

In a second aspect, an embodiment of the present application provides a channel demodulation method, including: the first base station sends configuration information to the user equipment, wherein the configuration information is used for indicating the user equipment to increase at least one format of downlink control information; and sending the format of the downlink control information to the user equipment, wherein the format of the downlink control information is used for the user equipment to acquire a corresponding reference signal for channel estimation so as to demodulate a downlink physical shared channel. By increasing the format of downlink control information, when the PDSCH is transmitted only in the serving cell or scheduled independently, DMRS overhead is eliminated and the gain of JT/DPS is increased.

In one possible design, the configuration information further includes a configuration of a channel state information reference signal, and the configuration information is further used for instructing the user equipment to measure the channel state information according to the preconfigured first common reference signal and the channel state information reference signal. And informing the user equipment to adopt two sets of CSI measurements, and when the JT user equipment is returned to independent scheduling, corresponding CSI measurements exist, so that the demodulation performance is ensured.

In another possible design, the first base station receives channel state information sent by the user equipment; and determining the format of the downlink control information according to the channel state information.

In another possible design, when the first base station or the second base station independently schedules the user equipment, the first base station determines that the format of the downlink control information is a first format according to the channel state information measured by the first common reference signal; when the first base station and the second base station carry out combined scheduling on the user equipment, the first base station determines the format of the downlink control information to be the second format according to the channel state information measured by the channel state information reference signal.

In another possible design, when Cell0 and Cell1 jointly schedule the ue, the ue reports 2 sets of measurement results based on CRS and CSI-RS, and Cell0 uses DCI format 2C/1A according to the CSI result measured by CSI-RS. When the Cell0 independently schedules the user equipment, the user equipment reports 2 sets of measurement results based on the CRS and the CSI-RS, and the Cell0 adopts the format of DCI 2/2A/1A according to the CSI result measured by the CRS.

In another possible design, when Cell0 and Cell1 perform joint scheduling on user equipment, the user equipment reports CSI measurement results based on CSI-RSs of two cells and CSI measurement results based on a CRS of a serving Cell, and Cell0 adopts a DCI format to be DCI 2D/1A according to the CSI results measured by the CSI-RSs. When the Cell0 independently schedules the user equipment, the user equipment reports the CSI measurement result based on the CSI-RSs of the two cells and the CSI measurement result based on the CRS of the serving Cell, and the Cell0 adopts the format of DCI of 2/2A/1A according to the CSI measurement result of the CRS.

In another possible design, the first base station determines a scheduling manner for the ue according to the first common reference signal and channel state information measured by the channel state information reference signal, where the scheduling manner includes joint scheduling or independent scheduling.

In another possible design, when a cell transmitting a downlink physical shared channel is a serving cell to which a first base station belongs, the first base station determines that a format of downlink control information is a first format according to channel state information measured by a first common reference signal; when the cell sending the downlink physical shared channel is a cooperative cell to which the second base station belongs, the first base station determines that the format of the downlink control information is the second format according to the channel state information measured by the channel state information reference signal.

In another possible design, when the PDSCH is transmitted in the cooperating Cell, the ue reports two sets of measurement results, one is based on the CSI result measured by the two-Cell CSI-RS and the other is based on the CSI result measured by the serving Cell CRS, and the Cell0 adopts the DCI format of 2D/1A according to the CSI result measured by the CSI-RS. When the PDSCH is sent in a serving Cell, the user equipment reports two sets of measurement results, one CSI result based on the CSI-RS measurement of the two cells and one CSI result based on the CRS measurement of the serving Cell, and the Cell0 adopts the format of DCI to be 2/2A/1A according to the CSI result based on the CRS measurement.

In another possible design, the first base station determines a cell for sending a downlink physical shared channel according to channel state information measured by the first common reference signal and the channel state information reference signal, where the cell includes a serving cell to which the first base station belongs or a cooperative cell to which the second base station belongs.

In a third aspect, the present application provides a user equipment configured to implement the method and the functions performed by the user equipment in the first aspect, where the user equipment is implemented by hardware/software, and the hardware/software includes units corresponding to the functions.

In a fourth aspect, the present application provides a first base station, where the first base station is configured to implement the method and the functions performed by the first base station in the second aspect, and the first base station is implemented by hardware/software, where the hardware/software includes units corresponding to the functions.

In a fifth aspect, the present application provides another user equipment, including: the channel demodulation method comprises a processor, a memory and a communication bus, wherein the communication bus is used for realizing connection communication between the processor and the memory, and the processor executes a program stored in the memory for realizing the steps in the channel demodulation method provided by the first aspect.

In one possible design, the ue provided in this application may include a module for performing the method design described above, where the module corresponds to the ue behavior. The modules may be software and/or hardware.

In a sixth aspect, the present application provides another first base station, including: the channel demodulation method comprises a processor, a memory and a communication bus, wherein the communication bus is used for realizing connection communication between the processor and the memory, and the processor executes a program stored in the memory for realizing the steps in the channel demodulation method provided by the second aspect.

In one possible design, the ue provided in this application may include a module configured to perform the corresponding first base station behavior in the above method design. The modules may be software and/or hardware.

In a seventh aspect, the present application provides a computer-readable storage medium having stored therein instructions, which when executed on a computer, cause the computer to perform the method of the above-described aspects.

In an eighth aspect, the present application provides a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of the above aspects.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.

Fig. 1 is a schematic architecture diagram of a channel demodulation system according to an embodiment of the present application;

FIG. 2 is a schematic view of JT provided by an embodiment of the present application;

FIG. 3 is a diagram illustrating a DPS provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of a 2T/4T JT scheme of TM9 according to an embodiment of the present application;

FIG. 5(A) is a schematic diagram of a 2T/4T JT scheme of TM10 according to an embodiment of the present application;

FIG. 5(B) is a schematic diagram of a 2T/4T DPS scheme of TM10 provided in an embodiment of the present application;

fig. 6 is a flowchart illustrating a channel demodulation method according to an embodiment of the present application

FIG. 7 is a schematic diagram of another 2T/4T JT scheme for TM9, provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of another 2T/4T JT scheme for TM10, provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of another 2T/4T DPS scheme of TM10 provided in the embodiments of the present application

Fig. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a first base station according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of another user equipment proposed in the present application;

fig. 13 is a schematic structural diagram of another first base station proposed in the present application.

Detailed Description

The embodiments of the present application will be described below with reference to the drawings.

Referring to fig. 1, fig. 1 is a schematic diagram of an architecture of a channel demodulation system according to an embodiment of the present disclosure, where the channel demodulation system includes a User Equipment (UE), a first base station, and a second base station, and the UE can switch between a serving cell to which the first base station belongs and a cooperating cell to which the second base station belongs. A user device may refer to a device that provides voice and/or data connectivity to a user, may also be connected to a computing device such as a laptop or desktop computer, or may be a standalone device such as a Personal Digital Assistant (PDA). A user equipment may also be called a system, subscriber unit, subscriber station, mobile, remote station, access point, remote terminal, access terminal, user agent, or user device. The first base station and the second base station may be an access point, a node B, an evolved node B (eNB), or a 5G base station (gNB), and refer to devices in an access network that communicate with wireless terminals over an air interface through one or more sectors. By converting received air-interface frames to IP packets, the base station may act as a router between the wireless terminal and the rest of the access network, which may include an internet protocol network. The base station may also coordinate the management of attributes for the air interface.

In the embodiment of the present application, DL CoMP mainly includes JT and DPS technologies, and data of a UE is available on nodes of at least one CoMP cooperating set. As shown in fig. 2, fig. 2 is a schematic view of a JT scheme provided in the embodiments of the present application. After the UE moves from Cell1 to the overlapping area of Cell1 and Cell2, Cell1 transmits PDCCH to the UE, and Cell1 and Cell2 simultaneously transmit PDSCH to the UE. In the JT scheme, multiple nodes (which may be part or all CoMP cooperating sets) transmit data to one or more UEs on time-frequency resources, which may improve received signal quality and/or data throughput, and the transmission mode performed by the multiple nodes at the same time may be coherent or non-coherent. As shown in fig. 3, fig. 3 is a schematic diagram of a DPS provided in an embodiment of the present application. After the UE moves from Cell1 to the overlapping area of Cell1 and Cell2, Cell1 transmits PDCCH and Cell2 transmits PDSCH to the UE. In the DPS scheme, data is transmitted from time-frequency resources on one node (in a CoMP cooperating set), a transmission/null transmission (multiplexing) node may vary between subframes or change over RB pairs within one subframe (variable over time slots), and the data is simultaneously available at multiple nodes, which also includes Dynamic Cell Selection (DCS) in the process. DPS and JT may be used in conjunction to select multiple nodes for transmission of data on time-frequency resources.

Based on the architecture of the channel demodulation system, the embodiments of the present application provide the following channel demodulation methods, including:

FIG. 4 is a schematic diagram of a 2T/4T JT scheme of TM9 according to an embodiment of the present application. In the scheme, the UE only reports a set of CSI measurement based on the CSI-RS; the PDCCH is transmitted in a serving cell, and the UE supports the PDSCH with the DCI 2C/1A format based on CRS demodulation; in a serving Cell (Cell0) and a coordinated Cell (Cell1) for joint transmission, the UE demodulates the PDSCH of the DCI 2C based on the DMRS; PDSCH is sent independently in the serving cell, for example: in a certain Transmission Time Interval (TTI), RB resources are not obtained from the cooperating cell, and it is necessary to fallback to the serving cell to perform independent scheduling on the UE. However, TM9 only supports 1 set of CSI measurement, when JT user falls back to independent scheduling, there is no corresponding CSI measurement, channel mismatch, and DCI 2C lacks Precoding Matrix Indicator (PMI)/Rank Indicator (RI), it is difficult to guarantee demodulation performance, and DMRS in DCI 2C format brings 8% -16% overhead.

FIG. 5(A) is a schematic diagram of a 2T/4T JT scheme of TM10 according to an embodiment of the present application. In the scheme, the UE reports two sets of CSI measurements based on the CSI-RS; the PDCCH is transmitted in a serving cell, and the UE supports DCI 2D/1A based on CRS demodulation; PDSCH is jointly transmitted in a serving Cell (Cell0) and a cooperative Cell (Cell1), and the UE demodulates the PDSCH in a DCI 2D format based on the DMRS; PDSCH is sent independently in the serving cell, for example: in a certain TTI, RB resources are not obtained from the cooperating cell, and it is necessary to fallback to the serving cell to perform independent scheduling on the UE. FIG. 5(B) is a schematic diagram of a 2T/4T DPS scheme of TM10 according to an embodiment of the present application. In the scheme, the UE reports two sets of CSI measurements based on the CSI-RS; the PDCCH is transmitted in a serving cell, and the UE supports DCI 2D/1A based on CRS demodulation; the PDSCH is sent in a cooperative cell, and the UE demodulates the DCI 2D PDSCH based on the DMRS; PDSCH is transmitted in the serving cell, for example: in a certain TTI, RB resources are not obtained from the cooperating cell, and it is necessary to fallback to the serving cell to perform independent scheduling on the UE. For the 2T/4T JT scheme and the 2T/4T DPS scheme of TM10, when PDSCH is only transmitted in a serving cell, the DMRS of DCI 2D brings 8% -16% of overhead and engulfs the gain of JT/DPS. In order to solve the above problems, the following solutions are provided.

Referring to fig. 6, fig. 6 is a flowchart illustrating a channel demodulation method according to an embodiment of the present application, where the method includes, but is not limited to, the following steps:

s601, the first base station sends configuration information to the ue, where the configuration information is used to instruct the ue to add at least one format of downlink control information. The at least one format includes a first format, for example, a DCI2 or 2A format may be added. The configuration information further includes configuration of a channel state information reference signal, and the configuration information is further used for instructing the user equipment to measure channel state information according to a first pre-configured common reference signal and the channel state information reference signal.

S602, the ue measures channel state information according to a pre-configured first common reference signal and the channel state information reference signal.

For example, it may be predetermined that, in a 2T/4T JT scheme of TM9, the periodic CSI may be measured and reported based on CRS, and the aperiodic CSI may be reported based on CSI-RS measurement. In a 2T/4T DPS or JT scheme of TM10, one CSI process is measured based on CRS, and the other CSI process is measured based on CSI-RS, and CSI reporting is respectively performed.

S603, the ue sends the channel state information to the first base station.

S604, the base station determines the format of the downlink control information according to the channel state information.

In a possible implementation manner, when the first base station or the second base station independently schedules the user equipment, the first base station determines, according to the channel state information measured by the first common reference signal, that a format of the downlink control information is the first format; when the first base station and the second base station perform joint scheduling on the user equipment, the first base station determines that the format of the downlink control information is a second format according to the channel state information measured by the channel state information reference signal.

For example, as shown in fig. 7, fig. 7 is a schematic diagram of a 2T/4T JT scheme of TM9 provided in this embodiment of the present application, where when Cell0 and Cell1 perform joint scheduling on user equipment, the user equipment reports 2 sets of measurement results based on CRS and CSI-RS, and Cell0 adopts DCI format 2C/1A according to the CSI result measured by CSI-RS. When the Cell0 independently schedules the user equipment, the user equipment reports 2 sets of measurement results based on the CRS and the CSI-RS, and the Cell0 adopts the format of DCI 2/2A/1A according to the CSI result measured by the CRS. The 2T/4T DPS scheme of TM9 is also supported due to the CRS and CSI-RS 2 set of measurements.

As shown in fig. 8, fig. 8 is a schematic diagram of a 2T/4T JT scheme of TM10 according to an embodiment of the present disclosure. When the Cell0 and the Cell1 jointly schedule the user equipment, the user equipment reports a CSI measurement result based on CSI-RSs of two cells and a CSI measurement result based on a CRS of a serving Cell, and the Cell0 adopts a DCI format to be DCI 2D/1A according to the CSI result measured by the CSI-RSs. When the Cell0 independently schedules the user equipment, the user equipment reports the CSI measurement result based on the CSI-RSs of the two cells and the CSI measurement result based on the CRS of the serving Cell, and the Cell0 adopts the format of DCI of 2/2A/1A according to the CSI measurement result of the CRS.

In addition, the first base station may determine a scheduling manner for the ue according to the channel state information measured by the first common reference signal and the channel state information reference signal, where the scheduling manner includes the joint scheduling or the independent scheduling. For example, in a TTI, when a JT ue gets a scheduling opportunity, the first base station selects joint scheduling or independent scheduling according to at least one of 2 sets of CSI measurement, Modulation and Coding Scheme (MCS) and RB resources of the neighbor cell.

In another possible implementation manner, when the cell that sends the downlink physical shared channel is a serving cell to which the first base station belongs, the first base station determines, according to the channel state information measured by the first common reference signal, that the format of the downlink control information is the first format; when the cell transmitting the downlink physical shared channel is a cooperative cell to which the second base station belongs, the first base station determines that the format of the downlink control information is a second format according to the channel state information measured by the channel state information reference signal.

For example, as shown in fig. 9, fig. 9 is a schematic diagram of a 2T/4T DPS scheme of TM10 provided in an embodiment of the present application. When the PDSCH is sent in the cooperative Cell, the user equipment reports two sets of measurement results, one CSI result based on the CSI-RS measurement of the two cells and one CSI result based on the CRS measurement of the serving Cell, and the Cell0 adopts a DCI format of 2D/1A according to the CSI result based on the CSI-RS measurement. When the PDSCH is sent in a serving Cell, the user equipment reports two sets of measurement results, one CSI result based on the CSI-RS measurement of the two cells and one CSI result based on the CRS measurement of the serving Cell, and the Cell0 adopts the format of DCI to be 2/2A/1A according to the CSI result based on the CRS measurement.

In addition, the first base station determines a cell for transmitting the downlink physical shared channel according to the channel state information measured by the first common reference signal and the channel state information reference signal, where the cell includes a serving cell to which the first base station belongs or a cooperative cell to which the second base station belongs. For example, in a TTI, when a JT ue gets a scheduling opportunity, the first base station selects a PDSCH-transmitting cell according to at least one of 2 sets of CSI measurements, MCS adjustments, and RB resources of a neighboring cell.

S605, the first base station sends the format of the downlink control information to the user equipment.

In a specific implementation, the first base station may send a physical downlink control channel to the user equipment, where the physical downlink control channel indicates a format of the downlink control information.

S606, the ue obtains the reference signal corresponding to the format of the downlink control information to perform channel estimation so as to demodulate the downlink physical shared channel.

In a specific implementation, the ue first receives a physical downlink control channel sent by the first base station; and then, performing blind detection on the physical downlink control channel to determine the format of the downlink control information. When the format of the downlink control information is the first format, the user equipment receives a second common reference signal sent by the first base station to perform channel estimation so as to demodulate the downlink physical shared channel; and when the format of the downlink control information is a second format, the user equipment receives a demodulation reference signal sent by the first base station to perform channel estimation so as to demodulate the downlink physical shared channel.

For example, after receiving the PDCCH transmitted by Cell0, the user equipment performs blind detection on the PDCCH, thereby determining the format of the DCI. As shown in fig. 7, when the DCI format is 2/2a/1A, the UE receives the CRS transmitted by the base station, performs channel estimation, and demodulates the PDSCH. And when the format of the DCI is 2C, the UE receives the DMRS sent by the base station for channel estimation, and then demodulates the PDSCH. As shown in fig. 8, when the DCI format is 2/2a/1A, the UE receives the CRS transmitted by the base station, performs channel estimation, and demodulates the PDSCH. And when the format of the DCI is 2D, the UE receives the DMRS sent by the base station for channel estimation, and then demodulates the PDSCH. As shown in fig. 9, when the DCI format is 2/2a/1A, the UE receives the CRS transmitted by the base station, performs channel estimation, and demodulates the PDSCH. And when the format of the DCI is 2D, the UE receives the DMRS sent by the base station for channel estimation, and then demodulates the PDSCH.

In the embodiment of the invention, a first base station sends configuration information to user equipment, wherein the configuration information comprises at least one format of added downlink control information; then the first base station sends the format of the downlink control information to the user equipment; the user equipment may acquire a reference signal corresponding to a format of the downlink control information for channel estimation to demodulate the downlink physical shared channel. By increasing the format of downlink control information, when the PDSCH is transmitted only in the serving cell or scheduled independently, DMRS overhead is eliminated and the gain of JT/DPS is increased.

The method of the embodiments of the present application is set forth above in detail and the apparatus of the embodiments of the present application is provided below.

As shown in fig. 10, fig. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present application. The user equipment comprises a receiving module 1001, a processing module 1002 and a sending module 1003, wherein the detailed description of each module is as follows.

A receiving module 1001, configured to receive configuration information sent by a first base station, where the configuration information includes at least one format of added downlink control information;

a receiving module 1001, configured to receive a format of the downlink control information sent by the first base station;

a processing module 1002, configured to obtain a reference signal corresponding to the format of the downlink control information, and perform channel estimation to demodulate a downlink physical shared channel.

Optionally, the configuration information further includes configuration of a channel state information reference signal;

the processing module 1002 is further configured to measure channel state information according to a preconfigured first common reference signal and the channel state information reference signal;

a sending module 1003, configured to send the channel state information to the first base station, where the channel state information is used for the base station to determine a format of the downlink control information.

Optionally, the at least one format includes a first format; the processing module 1002 is specifically configured to:

when the format of the downlink control information is the first format, receiving a second common reference signal sent by the first base station for channel estimation so as to demodulate the downlink physical shared channel;

and when the format of the downlink control information is a second format, receiving a demodulation reference signal sent by the first base station to perform channel estimation so as to demodulate the downlink physical shared channel.

Optionally, the receiving module 1001 is specifically configured to:

receiving a physical downlink control channel sent by the first base station;

and performing blind detection on the physical downlink control channel to determine the format of the downlink control information.

It should be noted that the implementation of each module may also correspond to the corresponding description of the method embodiment shown in fig. 6, and execute the method and the function executed by the user equipment in the foregoing embodiment.

As shown in fig. 11, fig. 11 is a schematic structural diagram of a first base station according to an embodiment of the present application. The first base station includes a transmitting module 1101, a receiving module 1102 and a processing module 1103, wherein each module is described in detail as follows.

A sending module 1101, configured to send configuration information to a user equipment, where the configuration information is used to instruct the user equipment to add at least one format of downlink control information;

the sending module 1101 is further configured to send the format of the downlink control information to the ue, where the format of the downlink control information is used for the ue to obtain a corresponding reference signal for channel estimation to demodulate a downlink physical shared channel.

The configuration information further includes configuration of a channel state information reference signal, and the configuration information is further used for instructing the user equipment to measure channel state information according to a first pre-configured common reference signal and the channel state information reference signal.

Optionally, the receiving module 1102 is configured to receive the channel state information sent by the ue; a processing module 1103, configured to determine a format of the downlink control information according to the channel state information.

Optionally, the at least one format includes a first format; the processing module 1103 is specifically configured to:

when the first base station or the second base station independently schedules the user equipment, determining the format of the downlink control information to be the first format according to the channel state information measured by the first common reference signal;

and when the first base station and the second base station carry out joint scheduling on the user equipment, determining the format of the downlink control information to be a second format according to the channel state information measured by the channel state information reference signal.

Optionally, the processing module 1103 is further configured to determine a scheduling manner for the ue according to the channel state information measured by the first common reference signal and the channel state information reference signal, where the scheduling manner includes the joint scheduling or the independent scheduling.

when the cell transmitting the downlink physical shared channel is the serving cell to which the first base station belongs, the first base station determines that the format of the downlink control information is the first format according to the channel state information measured by the first common reference signal;

when the cell transmitting the downlink physical shared channel is a cooperative cell to which the second base station belongs, the first base station determines that the format of the downlink control information is a second format according to the channel state information measured by the channel state information reference signal.

Optionally, the processing module 1103 is further configured to determine, according to the channel state information measured by the first common reference signal and the channel state information reference signal, a cell that sends the downlink physical shared channel, where the cell includes a serving cell to which the first base station belongs or a cooperative cell to which the second base station belongs.

It should be noted that the implementation of each module may also correspond to the corresponding description of the method embodiment shown in fig. 6, and execute the method and the function executed by the first base station in the foregoing embodiment.

Referring to fig. 12, fig. 12 is a schematic structural diagram of another ue according to the present application. As shown, the user equipment may include: at least one processor 1201, at least one communication interface 1202, at least one memory 1203 and at least one communication bus 1204.

The processor 1201 may be, for example, a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a digital signal processor and a microprocessor, or the like. The communication bus 1204 may be a peripheral component interconnect standard PCI bus or an extended industry standard architecture EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 12, but this is not intended to represent only one bus or type of bus. A communication bus 1204 is used to enable connective communication between these components. The communication interface 1202 of the device in this embodiment of the present application is used for performing signaling or data communication with other node devices. The Memory 1203 may include a volatile Memory, such as a Nonvolatile dynamic Random Access Memory (NVRAM), a Phase Change Random Access Memory (PRAM), a Magnetoresistive Random Access Memory (MRAM), and the like, and may further include a Nonvolatile Memory, such as at least one magnetic Disk Memory device, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a flash Memory device, such as a NOR flash Memory (NOR flash Memory) or a NAND flash Memory (EEPROM), a semiconductor device, such as a Solid State Disk (SSD), and the like. The memory 1203 may optionally also be at least one storage device located remotely from the aforementioned processor 1201. A set of program codes is stored in the memory 1203, and the processor 1201 executes the programs executed by the user equipment described above in the memory 1203.

Receiving configuration information sent by a first base station, wherein the configuration information comprises at least one format of added downlink control information;

receiving a format of the downlink control information sent by the first base station;

and acquiring a reference signal corresponding to the format of the downlink control information to perform channel estimation so as to demodulate a downlink physical shared channel.

Optionally, the processor 1201 is further configured to perform the following operations:

after the user equipment receives the configuration information sent by the first base station, the method further includes:

measuring channel state information according to a first pre-configured common reference signal and the channel state information reference signal;

and sending the channel state information to the first base station, wherein the channel state information is used for the base station to determine the format of the downlink control information.

receiving a physical downlink control channel sent by the first base station;

Further, the processor may cooperate with the memory and the communication interface to perform the operations of the user equipment in the embodiments of the above application.

Please refer to fig. 13, fig. 13 is a schematic structural diagram of another first base station according to the present application. As shown, the user equipment may include: at least one processor 1301, at least one communication interface 1302, at least one memory 1303, and at least one communication bus 1304.

The processor 1301 may be any of the various types of processors mentioned above. The communication bus 1304 may be a peripheral component interconnect standard PCI bus or an extended industry standard architecture EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 13, but this is not intended to represent only one bus or type of bus. A communication bus 1304 is used to enable connective communication between these components. The communication interface 1302 of the device in this embodiment of the present application is used for performing signaling or data communication with other node devices. The memory 1303 may be various types of memories mentioned earlier. The memory 1303 may optionally be at least one memory device located remotely from the processor 1301. A set of program codes is stored in the memory 1303, and the processor 1301 executes the programs executed by the user equipment in the memory 1303.

Sending configuration information to user equipment, wherein the configuration information is used for indicating the user equipment to increase at least one format of downlink control information;

and sending the format of the downlink control information to the user equipment, wherein the format of the downlink control information is used for the user equipment to acquire a corresponding reference signal for channel estimation so as to demodulate a downlink physical shared channel.

Optionally, the processor 1301 is further configured to perform the following operations:

receiving the channel state information sent by the user equipment;

and determining the format of the downlink control information according to the channel state information.

determining a scheduling mode for the user equipment according to the channel state information measured by the first common reference signal and the channel state information reference signal, wherein the scheduling mode includes the joint scheduling or the independent scheduling.

when the cell transmitting the downlink physical shared channel is the serving cell to which the first base station belongs, determining the format of the downlink control information to be the first format according to the channel state information measured by the first common reference signal;

and when the cell transmitting the downlink physical shared channel is a cooperative cell to which the second base station belongs, determining the format of the downlink control information to be a second format according to the channel state information measured by the channel state information reference signal.

and determining a cell for sending the downlink physical shared channel according to the channel state information measured by the first common reference signal and the channel state information reference signal, wherein the cell comprises a service cell to which the first base station belongs or a cooperative cell to which the second base station belongs.

Further, the processor may cooperate with the memory and the communication interface to perform the operations of the first base station in the embodiments of the above application.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The above-mentioned embodiments further explain the objects, technical solutions and advantages of the present application in detail. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for channel demodulation, the method comprising:

the method comprises the steps that user equipment receives configuration information sent by a first base station, wherein the configuration information comprises at least one format of added downlink control information and configuration of a channel state information reference signal;

the user equipment measures channel state information according to a first pre-configured common reference signal and the channel state information reference signal;

the user equipment sends the channel state information to the first base station, and the channel state information is used for the base station to determine the format of the downlink control information;

the user equipment receives the format of the downlink control information sent by the first base station;

and the user equipment acquires a reference signal corresponding to the format of the downlink control information to carry out channel estimation so as to demodulate a downlink physical shared channel.

2. The method of claim 1, wherein the at least one format comprises a first format;

the step of the user equipment acquiring the reference signal corresponding to the format of the downlink control information to perform channel estimation so as to demodulate the downlink physical shared channel comprises:

when the format of the downlink control information is the first format, the user equipment receives a second common reference signal sent by the first base station to perform channel estimation so as to demodulate the downlink physical shared channel;

and when the format of the downlink control information is a second format, the user equipment receives a demodulation reference signal sent by the first base station to perform channel estimation so as to demodulate the downlink physical shared channel.

3. The method of claim 1, wherein the receiving, by the ue, the downlink control information sent by the base station in a format comprising:

the user equipment receives a physical downlink control channel sent by the first base station;

and the user equipment performs blind detection on the physical downlink control channel and determines the format of the downlink control information.

4. A method for channel demodulation, the method comprising:

a first base station sends configuration information to user equipment, wherein the configuration information is used for indicating the user equipment to increase at least one format of downlink control information and the configuration of a channel state information reference signal, and the configuration information is used for indicating the user equipment to measure channel state information according to a pre-configured first common reference signal and the channel state information reference signal;

the first base station receives the channel state information sent by the user equipment;

the first base station determines the format of the downlink control information according to the channel state information;

and the first base station sends the format of the downlink control information to the user equipment, wherein the format of the downlink control information is used for the user equipment to acquire a corresponding reference signal for channel estimation so as to demodulate a downlink physical shared channel.

5. The method of claim 4, wherein the at least one format comprises a first format; the first base station determines the format of the downlink control information according to the channel state information, and the determining includes:

when the first base station or the second base station independently schedules the user equipment, the first base station determines the format of the downlink control information to be the first format according to the channel state information measured by the first common reference signal;

when the first base station and the second base station perform joint scheduling on the user equipment, the first base station determines that the format of the downlink control information is a second format according to the channel state information measured by the channel state information reference signal.

6. The method of claim 5, wherein the method further comprises:

and the first base station determines a scheduling mode for the user equipment according to the channel state information measured by the first common reference signal and the channel state information reference signal, wherein the scheduling mode comprises the joint scheduling or the independent scheduling.

7. The method of claim 4, wherein the at least one format comprises a first format; the first base station determines the format of the downlink control information according to the channel state information, and the determining includes:

and when the cell transmitting the downlink physical shared channel is a cooperative cell to which the second base station belongs, the first base station determines that the format of the downlink control information is a second format according to the channel state information measured by the channel state information reference signal.

8. The method of claim 4, wherein the method further comprises:

and the first base station determines a cell for sending the downlink physical shared channel according to the channel state information measured by the first common reference signal and the channel state information reference signal, wherein the cell comprises a service cell to which the first base station belongs or a cooperation cell to which a second base station belongs.

9. A user equipment for channel demodulation, the user equipment comprising:

a receiving module, configured to receive configuration information sent by a first base station, where the configuration information includes at least one format of added downlink control information and configuration of a channel state information reference signal;

the processing module is used for measuring channel state information according to a first preset public reference signal and the channel state information reference signal;

a sending module, configured to send the channel state information to the first base station, where the channel state information is used by the base station to determine a format of the downlink control information;

the receiving module is further configured to receive a format of the downlink control information sent by the first base station;

the processing module is further configured to acquire a reference signal corresponding to the format of the downlink control information to perform channel estimation so as to demodulate a downlink physical shared channel.

10. The user equipment of claim 9, wherein the at least one format comprises a first format;

the processing module is specifically configured to:

11. The user equipment of claim 9, wherein the receiving module is specifically configured to:

receiving a physical downlink control channel sent by the first base station;

12. A first base station, the first base station comprising:

a sending module, configured to send configuration information to a user equipment, where the configuration information is used to instruct the user equipment to add at least one format of downlink control information and configuration of a channel state information reference signal, and the configuration information is used to instruct the user equipment to measure channel state information according to a pre-configured first common reference signal and the channel state information reference signal;

a receiving module, configured to receive the channel state information sent by the user equipment;

a processing module, configured to determine a format of the downlink control information according to the channel state information;

the sending module is further configured to send the format of the downlink control information to the ue, where the format of the downlink control information is used for the ue to obtain a corresponding reference signal for channel estimation to demodulate a downlink physical shared channel.

13. The first base station of claim 12, wherein said at least one format comprises a first format; the processing module is specifically configured to:

14. The first base station of claim 13, wherein the processing module is further configured to determine a scheduling manner for the ue according to the channel state information measured by the first common reference signal and the channel state information reference signal, and the scheduling manner includes the joint scheduling or the independent scheduling.

15. The first base station of claim 12, wherein said at least one format comprises a first format; the processing module is specifically configured to:

16. The first base station of claim 12, wherein the processing module is further configured to determine a cell for sending the downlink physical shared channel according to the channel state information measured by the first common reference signal and the channel state information reference signal, where the cell includes a serving cell to which the first base station belongs or a cooperative cell to which a second base station belongs.

17. A user equipment for channel demodulation, comprising: the device comprises a memory, a communication bus and a processor, wherein the memory is used for storing program codes, and the processor is used for calling the program codes and executing the following operations:

receiving configuration information sent by a first base station, wherein the configuration information comprises at least one format of added downlink control information and configuration of a channel state information reference signal;

sending the channel state information to the first base station, wherein the channel state information is used for the base station to determine the format of the downlink control information;

18. A base station, comprising: the device comprises a memory, a communication bus and a processor, wherein the memory is used for storing program codes, and the processor is used for calling the program codes and executing the following operations:

sending configuration information to user equipment, wherein the configuration information is used for indicating the user equipment to increase at least one format of downlink control information and configuration of a channel state information reference signal, and the configuration information is used for indicating the user equipment to measure channel state information according to a first pre-configured common reference signal and the channel state information reference signal;

receiving the channel state information sent by the user equipment;

determining the format of the downlink control information according to the channel state information;

19. A computer-readable storage medium having stored therein instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-8.