TWI486006B - Method and apparatus for transmitting and receiving downlink control information based on multiuser MIMO transmission - Google Patents

Description

Method and device for transmitting and receiving downlink control information based on multi-user MIMO transmission

Embodiments of the present invention generally relate to the field of wireless communication technologies. More specifically, embodiments of the present invention relate to methods and apparatus for transmitting and receiving downlink control information based on multi-user multiple input multiple output (MIMO) transmission.

In a wireless communication system, a channel entity downlink control channel (PDCCH) allocates various resources for downlink transmission over the entire communication system, which plays a key role in system scheduling. In particular, for multi-user multiple-input multiple-output (MU-MIMO) and multi-point coordinated transmission/reception (CoMP) systems, for example, the capacity limitations of the PDCCH have a significant impact on the overall performance of MU-MIMO and CoMP. For example, in MU-MIMO transmission, many user equipments (UEs) need to be scheduled on the same frame to achieve MU-MIMO gain, but the current PDCCH only includes a limited number of Control Channel Elements (CCEs), and Almost half of these CCEs will reserve a license for the uplink (UL). In Case 4 of CoMP transmission, the PDCCH capacity shortage becomes more severe than in other cases, as more UEs will be scheduled and thus consume more PDCCH bandwidth.

In order to improve the downlink (DL) MIMO performance of the Enhanced Long Term Evolution (LTE-A) system, it is necessary to consider reducing the control addition of the PDCCH and improving the design of the PDCCH in order to avoid the DL control region associated with deploying MU-MIMO/CoMP. Capacity limit. The current reduction of DL control additions is mainly due to the reduction of the physical downlink shared channel (PDSCH) and the physical uplink commonality. This is achieved by using the channel control information (DCI) format under the channel (PUSCH) schedule. For UEs with MU-MIMO/CoMP operation of LTE Rel-8/9/10, each paired UE (ie, a member participating in a group of MU-MIMO transmissions) has its own for row The DCI indicated by the process. Therefore, multiple PDCCHs with corresponding DCI formats will be used for all paired UEs occupying the same resource block. For existing DCI formats, many of the fields or fields in each DCI (eg, resource block (RB) allocation and carrier indication, etc.) are the same. In addition, a 16-bit cyclic redundancy check (CRC) is attached to each PDCCH channel. These settings will consume too many additional items and thus severely degrade the delivery efficiency of DCI messages.

In MU-MIMO transmission, multi-user interference (MUI) will occur when there is not enough spatial orthogonality between multiple users of the schedule. Due to the lack of interference information that is known to other UEs that are scheduled at the same time, UEs affected by the MUI will experience a loss in transmission performance. If the group forming or paired UE can know the MUI information (eg, precoding or channel status information) of other UEs in the group or paired, the UE can select a suitable receiver algorithm for MUI suppression.

Therefore, there is a need in the prior art for a method and apparatus for transmitting DCI based on MU-MIMO transmission. By using the method and the device, the DL control addition item can be reduced, thereby improving the overall performance of the communication system, and further implementing the MUI suppression, thereby improving the UE transmission rate and the system transmission amount.

In order to solve the above technical problem, an aspect of the present invention provides a method for transmitting downlink control information based on multi-user MIMO transmission, Include: transmitting, to each user equipment in one or more groups participating in the multi-user MIMO transmission, a wireless network temporary group identifier for identifying the group and a group for identifying each user equipment in the group User equipment specific identifier; and transmitting downlink control information to each user equipment in the one or more groups, wherein the downlink control information includes public scheduling indication information for the group and specific to each user equipment in the group The schedule indication information is obtained by the user equipment, and the public schedule indication information and the specific schedule indication information are obtained from the downlink control information by using the wireless network temporary group identifier and the user equipment specific identifier in the group.

According to an embodiment of the invention, the method further comprises dividing the user equipment into one or more groups participating in multi-user MIMO transmission based on channel status information received from a plurality of user equipments.

According to an embodiment of the present invention, the public schedule indication information includes at least information about the same carrier indication and resource block allocation for each user equipment in the group.

According to an embodiment of the present invention, the specific schedule indication information includes at least a transmit power control command, a new data indication, a hybrid automatic repeat request process number, and a data demodulation reference that are specific to each user equipment in the group. The configuration information of the signal, the method further comprising: generating a data demodulation variable reference signal of each user equipment according to the wireless network temporary group identifier and the configuration information of the data demodulation reference signal of each user equipment in the group Operation.

According to an embodiment of the invention, the method further comprises utilizing the The wireless network temporary group identifier performs a scrambling operation on the cyclic redundancy check information of the downlink control information; and transmits the downlink with the scrambled cyclic redundancy check information to each user equipment in the one or more groups Control information.

Another aspect of the present invention provides a method for receiving downlink control information based on multi-user MIMO transmission, comprising: receiving a wireless network sent by a base station for identifying one or more groups participating in multi-user MIMO transmission a temporary group identifier and a user equipment specific identifier for identifying each user equipment in the group; receiving, by the base station, downlink control information, where the downlink control information includes public scheduling information for the group And the specific schedule indication information for each user equipment in the group; and obtaining the public schedule indication information and the specific information from the downlink control information by using the wireless network temporary group identifier and the user equipment specific identifier in the group Schedule indication information.

According to an embodiment of the present invention, the public schedule indication information includes at least information about the same carrier indication and resource block allocation for each user equipment in the group.

According to an embodiment of the present invention, the specific schedule indication information includes at least a transmit power control command, a new data indication, a hybrid automatic repeat request process number, and a data demodulation reference that are specific to each user equipment in the group. The configuration information of the signal further includes: demodulating the configuration information of the variable reference signal according to the wireless network temporary group identifier and the data of each user equipment in the group to perform demodulation operation on the data demodulation variable reference signal Based on the data demodulation variable reference signal estimation in multi-user MIMO transmission Multi-user interference from other user equipments within the group; and receiver algorithm that suppresses the multi-user interference based on the estimated multi-user interference.

According to an embodiment of the present invention, the method further includes receiving downlink control information supplemented with cyclic redundancy check information scrambled by the wireless network temporary group identifier; using the wireless network temporary group identifier to buffer the redundancy The remaining inspection information performs a descrambling operation; and the cyclic redundancy check information based on the descrambling performs an inspection operation on the downlink control information.

An aspect of the present invention also provides an apparatus for transmitting downlink control information based on multi-user MIMO transmission, including: for transmitting, to each user equipment in one or more groups participating in multi-user MIMO transmission, a wireless network temporary group identifier of the group and a device for identifying a user equipment specific identifier in the group of each user equipment in the group; and for transmitting the downlink to each user equipment in the one or more groups The device for controlling information, wherein the downlink control information includes public scheduling indication information for the group and specific scheduling indication information for each user equipment in the group, and the user equipment is identified by the wireless network temporary group identifier And the user equipment specific identifier in the group obtains the public schedule indication information and the specific schedule indication information from the downlink control information.

Another aspect of the present invention also provides an apparatus for receiving downlink control information based on multi-user MIMO transmission, comprising: receiving, by a base station, one or more groups for identifying a multi-user MIMO transmission. a wireless network temporary group identifier and means for identifying a user equipment specific identifier in a group of each user equipment in the group; And means for receiving the downlink control information sent by the base station, where the downlink control information includes public scheduling indication information for the group and specific scheduling indication information for each user equipment in the group; The device for obtaining the public schedule indication information and the specific schedule indication information from the downlink control information by the wireless network temporary group identifier and the user equipment specific identifier in the group.

A plurality of aspects of the present invention also provide a base station and user equipment including the above devices, respectively.

The method and device for transmitting downlink control information based on the MU-MIMO transmission of the present invention reduce the additional items of the DL control signaling in the MU-MIMO transmission by using the new compact DCI format design, and the DCI format design Compatible with existing DCI formats. Further, since each UE in the group can estimate the MUI based on the MUI information of other UEs provided by the DCI of the present invention, the MUI can be effectively suppressed by using a suitable receiver algorithm.

The above and other objects, features and advantages of the present invention will become apparent from the Detailed Description Description

The basic idea of the present invention is to improve the structure of the existing DCI in order to effectively reduce the DL control signaling addition in the MU-MIMO/CoMP transmission, and at the same time utilize the information contained in the improved DCI to achieve effective suppression of the MUI. . According to an embodiment of the present invention, on the base station (BS) side, the BS allocates a radio network temporary group identifier (g-RNTI) for identifying the group to each UE in the same group and is used to identify each UE. Group specific UE Identification (for example, in the form of a serial number). Then, the BS sends a new format DCI to each UE, where the DCI includes the same common scheduling indication information for each UE in the group and specific scheduling information specific to each UE. On the UE side, the schedule indication information is obtained from the DCI using the previously received identifier for transmission scheduling and MUI suppression.

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

1 is a flow chart schematically showing a method of transmitting DCI based on MU-MIMO transmission according to an embodiment of the present invention. As shown in FIG. 1, method 100 begins in step S101. In step S102, the method 100 sends, to each UE in one or more groups participating in the MU-MIMO transmission, a g-RNTI for identifying the group and an intra-group UE for identifying each UE in the group. Specific identifier. The transmission can be implemented by a higher layer signaling (such as Radio Resource Control (RRC) signaling) or Layer 1 signaling.

In an embodiment, the BS may divide the plurality of UEs into one or more of the participating MU-MIMO transmissions based on channel state information (CSI) received from the plurality of UEs. Multiple UEs in the same group will perform MU-MIMO transmission on the same time frequency resource, while different groups will perform MU-MIMO transmission on different time frequency resources.

In an embodiment, the UE-specific identifier within the group may be a sequence number associated with the g-RNTI. For example, when there are four UEs in a group, the four UEs may be assigned with sequence numbers 0, 1, 2, and 3 to identify four UEs.

Next, in step S103, the method 100 sends a DCI to each UE in one or more groups, the DCI including public scheduling indication information for the group and For the specific scheduling indication information of each UE in the group, the UE obtains the common scheduling indication information and the specific scheduling indication information from the DCI by using the foregoing g-RNTI and the intra-group UE specific identifier.

In an embodiment, the foregoing common scheduling indication information includes at least information about the same carrier indication and resource block allocation for each UE in the group. The foregoing specific scheduling indication information includes at least a transmission power control command (TPC), a new data indication (NDI), a hybrid automatic repeat request (HARQ) process number, and a data demodulation variable reference signal (specific to each UE in the group). DMRS) configuration information.

When the specific scheduling indication information includes the configuration information of the DMRS, the method 100 may further include performing an operation of generating the DMRS of each UE according to the g-RNTI and the configuration information of the DMRS of each UE in the group.

In an embodiment, the method 100 may further include performing a scrambling operation on the CRC information of the DCI using the g-RNTI, and transmitting the DCI to which the scrambled CRC information is attached to each UE in the one or more groups.

Finally, method 100 ends in step S104.

By using the method 100 of the foregoing embodiment of the present invention, by using the compact new DCI format, it is not necessary to repeatedly send the common schedule indication information with the same content and multiple times of additional CRC information, thereby effectively reducing the downlink control signaling. Additional item.

2 is a flow chart schematically showing a method of receiving DCI based on MU-MIMO transmission according to another embodiment of the present invention. As shown in FIG. 2, method 200 begins in step S201. In step S202, the method 200 receives, by the BS, one or more groups used to identify the participating MU-MIMO transmissions. The g-RNTI and the intra-group UE specific identity used to identify each UE in the group. As mentioned before, the reception can be implemented by, for example, RRC high layer signaling or layer 1 signaling.

Next, in step S203, the method 200 receives the DCI transmitted by the BS, wherein the DCI includes public scheduling indication information for the group and specific scheduling indication information for each UE in the group. In an embodiment, the foregoing common scheduling indication information includes at least information about the same carrier indication and resource block allocation for each UE in the group, and the specific scheduling indication information includes at least each of the specific groups. UE TPC command, NDI, HARQ process number and DMRS configuration information.

After the step S203 is completed, the method 200 proceeds to step S204, where the method 200 obtains the public schedule indication information and the specific schedule indication information from the DCI by using the foregoing g-RNTI and the intra-group UE specific identifier. Finally, method 200 ends at step S205.

Although not shown in FIG. 2, in an embodiment, when the specific schedule indication information includes configuration information of the data demodulation variable reference signal, the method 200 may further include: according to the g-RNTI and the group The configuration information of the DMRS of each UE performs a demodulation operation on the DMRS.

Next, the method 200 selects a receiver algorithm that suppresses the MUI based on the DMRS estimation MUI from the other UEs in the group and the estimated MUI in the MU-MIMO transmission.

In another embodiment, the method 200 may further include receiving a DCI to which the CRC information scrambled by the g-RNTI is attached; performing a descrambling operation on the scrambled CRC information by using the g-RNTI; and performing CRC information based on the descrambling For DCI Perform an inspection.

By receiving the DCI with the new format at the UE by using the method 200 of the foregoing embodiment of the present invention, the downlink control signal addition item may be reduced due to repeatedly receiving the common indication information having the same content and the multiple added CRC information. . Further, by estimating interference information from other UEs in the MU-MIMO transmission, an appropriate receiver algorithm can be selected to effectively suppress the MUI. Since the skilled artisan can perform MUI suppression based on the obtained DMRS information by various suitable methods or approaches (for example, high-order minimum mean square error estimation algorithm), the present application does not describe too much here so as not to The invention is confusing as necessary.

FIG. 3 is a structural diagram schematically showing a DCI according to an embodiment of the present invention. As shown in FIG. 3, the DCI according to an embodiment of the present invention includes two parts, that is, a common signaling field or domain for a group (ie, public schedule indication information) and users 1 and 2 in the group. The UE specific signaling field or domain (ie, specific scheduling indication information for each UE within the group). As shown in FIG. 3, the common signaling field includes at least a carrier indication and a resource block allocation. The UE-specific signaling fields for the user 1 and the user 2 include at least a TPC command, a HARQ process ID, and a DMRS configuration information. Antenna chirp, scrambling identifier and layer number indication) and link adaptation information for transport block 1 and transport block 2, respectively, including modulation coding scheme (MCS), NDI and HARQ redundancy version (RV). For purposes of simplicity, only two UE-specific signaling fields are shown, but those skilled in the art will appreciate that more UE-specific signaling fields may be added as needed in accordance with the teachings of the present application.

FIG. 4 schematically illustrates a MU-based based on an embodiment of the present invention. A detailed flow diagram of a method 400 of MIMO transmission to transmit and receive DCI. As shown in FIG. 4, method 400 begins in step S401, where respective CSIs are transmitted by a plurality of UEs to a BS, although only one UE is shown here for the sake of brevity. In step S402, the BS allocates a plurality of UEs into one or more groups based on the received CSI. Then, in step S403, the BS sends the identifier information to the UE of each group by using the RRC signaling or the layer 1 signaling, where the identifier information includes the g-RNTI that identifies the group and is used to identify each of the groups. UE-specific identification within the group of the UE.

Next, in step S404, the BS forms a new DCI according to the present invention according to the determination result of the scheduling and resource allocation, and the DCI has the structure as described above, that is, the public scheduling indication information for the group and the group Specific schedule indication information for each UE within. In step S405, the BS scrambles the CRC information for DCI with the g-RNTI and appends it to the DCI. The flow proceeds to step S406, where the BS generates a DMRS according to the configuration information of the g-RNTI and the DMRS. Next, in step S407, the BS transmits the DCI of the new format (for example, via an existing PDCCH domain or an enhanced PDCCH (ePDCCH) domain) and a DMRS to each UE in each group. Execution of the above steps of method 400 completes the processing on the BS side. Next, method 400 proceeds to the processing flow on the UE side.

In step S408, the UE decodes the DCI by searching for the UE-specific search space by using the previously received g-RNTI, including performing a descrambling operation on the CRC by using the g-RNTI and using the CRC information to receive the DCI. Complete the check operation. Next, in step S409, the UE will use the received g-RNTI and its own specific identifier to read the public row in the DCI information. The program indicates information and specific schedule indication information for subsequent DMRS demodulation and PDSCH demodulation.

Next, in step S410, based on the acquired DMRS configuration information of the UE and other UEs in the group, the DMRS of the UE and the DMRS of other UEs in the group are subjected to a demodulation operation. In step S411, the MUI information (such as precoding or CSI information) caused by other UEs can be learned by demodulating the DMRSs of other UEs in the group, so that the UE can select an appropriate receiver calculus based on the acquired interference information. The method suppresses the MUI. For example, the UE may select a higher order least mean square error (MMSE) receiver algorithm for PDSCH decoding to suppress the MUI. In this case, the UE's transmission efficiency can be further improved.

With the method 400 of the above-described embodiment of the present invention, the DCI of the new format reduces the downlink control signaling addition caused by repeatedly transmitting the common indication information having the same content and the CRC information added multiple times. At the same time, by estimating the MUI from other UEs in the MU-MIMO transmission, the UE can pre-select an appropriate receiver algorithm to achieve effective suppression of the MUI. In addition, the above-described sequence of the processes is merely exemplary, and those skilled in the art can change them as needed without departing from the teachings of the present invention.

FIG. 5 schematically illustrates a block diagram of an apparatus 500 for transmitting DCI based on MU-MIMO transmissions in accordance with an embodiment of the present invention. The device 500 includes a first transmitting device 501 and a second transmitting device 502. In the device 500, the first sending device 501 is configured to send, to each UE in one or more groups participating in the MU-MIMO transmission, a g-RNTI for identifying the group and used to identify each UE in the group. UE-specific identification within the group (ie, performing the steps in method 100) Step S102), the second sending device 502 is configured to send DCI to each UE in one or more groups, where the DCI includes public scheduling indication information for the group and a specific scheduling indication for each UE in the group. The information is obtained by the UE, and the UE obtains the public schedule indication information and the specific schedule indication information from the DCI by using the g-RNTI and the UE-specific identifier in the group (ie, step S103 in the method 100 is performed). It can be seen that the method 100 illustrated in FIG. 1 can be implemented by the execution device 500.

FIG. 6 is a block diagram schematically showing an apparatus 600 for transmitting DCI based on MU-MIMO transmission according to another embodiment of the present invention. The device 600 includes a first receiving device 601, a second receiving device 602, and an obtaining device 603. In the device 600, the first receiving device 601 is configured to receive, by the BS, a g-RNTI for identifying one or more groups participating in the MU-MIMO transmission and for identifying each UE in the group. The UE-specific identifier (ie, step S202 in the performing method 200), the second receiving device 602 is configured to receive the DCI sent by the BS, where the DCI includes public scheduling indication information for the group and a specific row for each UE in the group. The process indicator information (ie, step S203 in the method 200) is used to obtain the public schedule indication information and the specific schedule indication information (ie, the execution) from the DCI by using the g-RNTI and the UE-specific identifier in the group. Step S204) in method 200. It can be seen that the method 200 illustrated in FIG. 2 can be implemented by the execution device 600.

Figure 7 illustrates performance estimates of user rates compared to prior art techniques implemented in accordance with the methods and apparatus of the present invention in an exemplary simulated environment. In this exemplary simulation environment, without loss of generality, it is assumed that there are 25 UEs in each cell, each BS is configured with 4 antennas, and each UE is configured with 2 antennas, and a positive and negative 45-degree cross-polarized antenna is used. . For the sake of brevity, only evaluation here The case of single stream transmission of each UE. As far as the receiver is concerned, the existing scheme usually adopts an MMSE receiver, and the present invention can select a high-order MMSE receiver for suppressing the MUI by the new DCI format. Under the above assumptions, it can be seen from the "user MIMO transmission rate" simulation result graph of Fig. 7 that the user (i.e., UE) rate using the method or device of the present invention is significantly higher than the existing cumulative probability distribution value. Program. Similarly, it can be seen from the simulation statistics in the following table that by using the new DCI format of the present invention, in addition to effectively reducing the downlink control signaling addition, the prior art is also obtained due to effective suppression of the MUI. Larger system average rate and edge user rate.

Although not shown in the drawings, those skilled in the art will appreciate that the methods 100, 200 or devices 500, 600 of the present invention can be implemented on a corresponding BS or UE, in accordance with the disclosure or teachings of the present specification. Achieve the formation of a new DCI and achieve suppression of the MUI by virtue of the DCI.

In the above, various embodiments of the present invention have been described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that embodiments of the present invention can be implemented by hardware, software, firmware, modules, or a combination thereof, or can be provided on a signal bearing medium for use with any suitable data processing system. The invention is embodied in a program product. Such signal bearing media can be a transmission medium or a recordable medium for machine readable information, including magnetic media, optical media, or other suitable media. Examples of recordable media include: magnetic in a hard disk drive Discs or floppy disks, CDs for optical drives, tapes, and other media that can be thought of by those skilled in the art. Those skilled in the art will recognize that any communication terminal having a suitable programming device will be capable of performing the steps of the method of the present invention as embodied in a program product.

It should be noted that in order to make the present invention easier to understand, the above description omits some more specific technical details that are well known to those skilled in the art and that may be necessary for the implementation of the present invention.

Although a particular embodiment of the invention has been disclosed, it will be understood by those skilled in the art Therefore, the invention is not limited to the specific embodiments, and the scope of the appended claims is intended to cover any and all such applications, modifications and embodiments.

500‧‧‧ equipment

501‧‧‧First transmitting device

502‧‧‧second transmitting device

600‧‧‧ equipment

601‧‧‧First receiving device

602‧‧‧second receiving device

603‧‧‧Acquisition device

1 is a flow chart schematically showing a method of transmitting DCI based on MU-MIMO transmission according to an embodiment of the present invention; FIG. 2 is a schematic diagram showing MU-MIMO based transmission according to another embodiment of the present invention. A flowchart of a method of receiving DCI; FIG. 3 is a structural diagram schematically showing DCI according to an embodiment of the present invention; and FIG. 4 is a schematic diagram showing transmission based on MU-MIMO transmission according to an embodiment of the present invention. And a detailed flowchart of a method of receiving DCI; FIG. 5 is a block diagram schematically showing an apparatus for transmitting DCI based on MU-MIMO transmission according to an embodiment of the present invention; FIG. 6 is a schematic diagram showing another according to the present invention. An embodiment based on MU- A block diagram of a device for MIMO transmission to receive DCI; and Figure 7 illustrates a performance estimate of a user rate compared to prior art implemented in accordance with the method and apparatus of the present invention in an exemplary simulated environment.

Claims (20)

A method for transmitting downlink control information based on multi-user MIMO transmission, comprising: transmitting, to each user equipment in one or more groups participating in multi-user MIMO transmission, a temporary identifier of a wireless network for identifying the group and a user equipment specific identifier for identifying each user equipment in the group; and transmitting downlink control information to each user equipment in the one or more groups, wherein the downlink control information includes a public row for the group And the specific scheduling indication information for each user equipment in the group, and the user equipment obtains the downlink control information from the downlink control information by using the wireless network temporary group identifier and the user equipment specific identifier in the group Public schedule indication information and the specific schedule indication information. The method of claim 1, further comprising: dividing the user equipment into one or more groups participating in multi-user MIMO transmission based on channel status information received from a plurality of user equipments. The method of claim 1, wherein the public schedule indication information includes at least information about the same carrier indication and resource block allocation for each user equipment in the group. The method of claim 1, wherein the specific schedule indication information includes at least a transmit power control command, a new data indication, a hybrid automatic repeat request process number, and a data demodulation change reference signal specific to each user equipment in the group. Configuring information, the method further comprising: according to the wireless network temporary group identifier and each user setting in the group The prepared data demodulates the configuration information of the reference signal to perform an operation of generating a data demodulation variable reference signal of each user equipment. The method of claim 1, further comprising: performing a scrambling operation on the cyclic redundancy check information of the downlink control information by using the wireless network temporary group identifier; and transmitting to each user equipment in the one or more groups Downlink control information with the scrambled cyclic redundancy check information attached. A method for receiving downlink control information based on multi-user MIMO transmission, comprising: receiving, by a base station, a wireless network temporary group identifier for identifying one or more groups participating in a multi-user MIMO transmission and for identifying a group a user equipment specific identifier in a group of each user equipment in the group; receiving downlink control information sent by the base station, wherein the downlink control information includes public scheduling indication information for the group and each user equipment in the group The specific schedule indication information and the public schedule indication information and the specific schedule indication information are obtained from the downlink control information by using the wireless network temporary group identifier and the user equipment specific identifier in the group. The method of claim 6, wherein the public schedule indication information includes at least information about the same carrier indication and resource block allocation for each user equipment in the group. The method of claim 6, wherein the specific schedule indication information includes at least a transmit power control command, a new data indication, a hybrid automatic repeat request process number, and a data demodulation reference signal that are specific to each user equipment in the group. The method further includes: performing a demodulation operation on the data demodulation variable reference signal according to the wireless network temporary group identifier and the configuration information of the data demodulation reference signal of each user equipment in the group; Demodulating the variable reference signal based on the data to estimate multi-user interference from other user equipments within the group in multi-user MIMO transmission; and selecting a receiver algorithm to suppress the multi-user interference based on the estimated multi-user interference. The method of claim 6, further comprising: receiving, after the cyclic redundancy check information scrambled by the temporary identifier of the wireless network, the line control information; using the wireless network temporary group identifier to buffer the redundancy The remaining inspection information performs a descrambling operation; and the cyclic redundancy check information based on the descrambling performs an inspection operation on the downlink control information. An apparatus for transmitting downlink control information based on multi-user MIMO transmission, comprising: sending, to each user equipment in one or more groups participating in multi-user MIMO transmission, a temporary group of wireless network for identifying the group And means for identifying a user equipment specific identifier in a group of each user equipment in the group; and means for transmitting downlink control information to each user equipment in the one or more groups, wherein the downlink control The information includes public scheduling instructions for the group and specific scheduling instructions for each user device in the group. The information is displayed, and the public schedule indication information and the specific schedule indication information are obtained from the downlink control information by the user equipment by using the wireless network temporary group identifier and the user equipment specific identifier in the group. The device of claim 10, further comprising: means for dividing the plurality of user devices into one or more groups participating in multi-user MIMO transmission based on channel status information received by the plurality of user devices. The device of claim 10, wherein the public schedule indication information includes at least information about the same carrier indication and resource block allocation for each user equipment in the group. The device of claim 10, wherein the specific schedule indication information includes at least a transmit power control command, a new data indication, a hybrid automatic repeat request process number, and a data demodulation change reference signal specific to each user equipment in the group. The configuration information, the device further includes: generating, according to the wireless network temporary group identifier and the configuration information of the data demodulation reference signal of each user equipment in the group, the data demodulation variable reference signal of each user equipment Device. The device of claim 10, further comprising: means for performing a scrambling operation on the cyclic redundancy check information of the downlink control information by using the wireless network temporary group identifier; and for the one or more groups Each user equipment in the device transmits a device with the line control information attached to the scrambled cyclic redundancy check information. A device for receiving downlink control information based on multi-user MIMO transmission, comprising: And a method for receiving, by the base station, a wireless network temporary group identifier for identifying one or more groups participating in the multi-user MIMO transmission, and a user equipment specific identifier for identifying each user equipment in the group And means for receiving the downlink control information sent by the base station, wherein the downlink control information includes public scheduling indication information for the group and specific scheduling indication information for each user equipment in the group; and And means for obtaining the public schedule indication information and the specific schedule indication information from the downlink control information by using the wireless network temporary group identifier and the user equipment specific identifier in the group. The device of claim 15, wherein the public schedule indication information includes at least information about the same carrier indication and resource block allocation for each user equipment in the group. The device of claim 15, wherein the specific schedule indication information includes at least a transmit power control command, a new data indication, a hybrid automatic repeat request process number, and a data demodulation change reference signal specific to each user equipment in the group. The device further includes: means for performing demodulation on the data demodulation variable reference signal according to the wireless network temporary group identifier and the configuration information of the data demodulation reference signal of each user equipment in the group Means for estimating multi-user interference from other user equipments within the group in multi-user MIMO transmission based on the data demodulation variable reference signal; and for suppressing the multi-user interference based on the estimated multi-user interference selection The device of the receiver algorithm. The device of claim 15, further comprising: means for receiving downlink control information supplemented with cyclic redundancy check information scrambled by the wireless network temporary group identifier; for utilizing the wireless network temporary group identifier Means for performing a descrambling operation on the scrambled cyclic redundancy check information; and means for performing an inspection operation on the downlink control information based on the descrambling cyclic redundancy check information. A base station comprising the apparatus of any one of claims 10 to 14. A user equipment comprising the apparatus of any one of claims 15 to 18.