TW201717562A - Method and apparatus of feedback enhancement for multiuser superposition transmission - Google Patents

Abstract

Embodiments of the present disclosure provide methods and apparatuses of feedback enhancement for multiuser superposition transmission with closed-loop precoding. The method comprises: receiving a first channel state information from first user equipment; receiving a second channel state information from a second user equipment paired with the first user equipment; and selecting, based on the first channel state information and the second channel state information, a first precoder information for the first user equipment and a second precoder information for the second user equipment. The embodiments of the present disclosure enable the base station to select suitable precoder information from channel state information reported by paired user equipments and send the suitable precoder information to the paired user equipments, wherein the near/victim UE can decode interference signals caused by the far/interfering UE based on the precoder information and increase the accuracy of decoding its own PDSCH data by removing interference signals caused by the far/interfering UE.

Description

Method and apparatus for enhancing feedback in multi-user overlay transmission

Embodiments of the present disclosure are generally directed to feedback enhancement, and more particularly to a method and apparatus for enhancing feedback in multi-user overlay transmission employing closed loop precoding.

In Multiuser Superposition Transmission (hereinafter referred to as MUST), multiple user equipments (UEs) are paired to realize more than one layer of data without separation of time, frequency, and spatial layers. Transmission (ie, using the same spatial precoding vector or the same transmission diversity scheme on the same resource element).

For example, Figure 1 illustrates one such environment. In FIG. 1, since UE2 is at the cell edge and is allocated a large transmission power, User Equipment 1 (UE1) will be seriously interfered by User Equipment 2 (UE2). UE1 with an advanced receiver is expected to be able to first decode the signal of UE2 and then remove it from the received signal and then decode the Physical Downlink Shared Channel (PDSCH) data of UE1 itself. Therefore, whether the interference signal caused by UE2 can be removed and how much interference can be removed It is essential for UE1 to decode its own data. In order to decode the signal of UE2 at UE1, the information of the allocated transmit power between the paired UEs (ie UE1 and UE2) is crucial for the receiver at UE1. Without the power allocation information, correctly decoding the interference signal at the near/victim UE (ie UE1) would be quite difficult and would also affect the removal by the distant/interfering UE (ie UE2). The accuracy of UE1 decoding its own PDSCH data after the interference.

There are currently ten different transmission modes (TM) defined for LTE. They are based on the specific structure of the antenna mapping, which reference signals are set for demodulation (Cell-Specific Reference Signal (CRS) or Demodulation Reference Signal (DM-RS)), and how channel state information (CSI) is acquired and fed back by the terminal. It is different when you go back to the Internet In the case of transmission modes 1 to 6, CRS is used for channel estimation, also referred to as CRS-based TM. The closed-loop codebook-based encoding is associated with transmission mode 4 (TM4). In the case of closed loop precoding, it is assumed that the network selects a precoder matrix based on feedback from the UE. It is defined in the current 3GPP standard that a UE selects a transmission rank and a precoder matrix based on measurements of CRS, the information of which is then reported in the form of a precoder matrix indication (PMI) and a rank indication (RI). eNB.

However, in the downlink MUST, the superimposed signals of the paired UEs will be transmitted with the respective allocated transmit power, which may affect the accuracy of obtaining CSI by measuring CRS and the selection of appropriate PMI and RI, since the UE usually hides The ground is assumed to be in single-user multiple input and multiple output (SU- MIMO) instead of MUST. More importantly, in addition to the signals selected for successful decoding of the near UE (e.g., UE1), the selected PMI and RI should also be suitable for decoding distant UEs at the near UE (e.g., UE1) (e.g., The signal of UE2), for example, to remove interference caused by distant UEs. In addition, the eNB also needs to indicate the selected PMI and RI to the near and far UEs.

Embodiments of the present disclosure are directed to a method and apparatus for enhanced feedback in multi-user overlay transmission employing closed loop precoding.

According to a first aspect of the present disclosure, there is provided a method for enhancing feedback in a multi-user overlay transmission employing closed-loop precoding, comprising: receiving first channel state information from a first user device; Receiving, by the user equipment, the second channel status information; and selecting, based on the first channel status information and the second channel status information, the first precoder information for the first user equipment and for the second user The second precoder information of the device.

In some embodiments, each of the first channel state information and the second channel state information comprises at least one of: a precoding matrix indication, a rank indication, and a channel quality indication.

In some embodiments, each of the first precoder information and the second precoder information comprises at least one of: a precoding matrix indication and a rank indication.

In some embodiments, the first user device and the second user The device is located in the same cell, and wherein the first user device is closer to the center of the cell than the second user device.

In some embodiments, the method further includes: transmitting the first precoder information and the second precoder information to the first user equipment; and transmitting the second precoder to the second user equipment News.

In some embodiments, the method further includes: transmitting power allocation information to the first user equipment, so that the first user equipment feeds back the first channel state information based on the power allocation information, where the power allocation information is used And indicating a power allocation between the first user equipment and the second user equipment.

In some embodiments, sending the power allocation information to the first user equipment includes: transmitting, to the first user equipment, a plurality of power allocation information, so that the first user equipment feedback corresponds to the multiple power allocation information. Multiple first channel status information.

In some embodiments, the first precoder information for the first user equipment and the second preamble for the second user equipment are selected based on the first channel state information and the second channel state information. The encoder information includes: selecting the first precoder information for decoding a signal of the first user device at the first user device; and selecting for the first user device and the second The second precoder information of the signal of the second user equipment is decoded by the user equipment.

In some embodiments, the first precoder information for the first user equipment and the second preamble for the second user equipment are selected based on the first channel state information and the second channel state information. Encoder information also The method includes: determining whether the first channel state information and the second channel state information match; and performing at least one of the following operations based on determining that the first channel state information and the second channel state information do not match: A user device is for single user transmission; and the first user device and the third user device are paired for multi-user overlay transmission.

According to a second aspect of the present disclosure, there is provided a method for enhancing feedback in a multi-user overlay transmission employing closed-loop precoding, comprising: transmitting first channel status information to a base station; receiving from the base station for First precoder information of a user equipment and second precoder information for the paired second user equipment; and decoding based on the first precoder information and the second precoder information a signal received by the base station, wherein the first user equipment and the second user equipment are located in the same cell, and wherein the first user equipment is closer to a center of the cell than the second user equipment.

In some embodiments, the method further comprises receiving power allocation information from the base station, the power allocation information being used to indicate a power allocation between the first user equipment and the second user equipment.

In some embodiments, the method further comprises obtaining the first channel state information by measurement of a cell-specific reference signal based on the power allocation information.

In some embodiments, receiving power allocation information from the base station includes receiving a plurality of power allocation information from the base station.

In some embodiments, the first channel status information packet is sent to the base station And transmitting, to the base station, a plurality of first channel state information corresponding to the plurality of power allocation information, wherein each of the first channel state information is respectively obtained by measurement of a cell-specific reference signal based on each power allocation information.

In some embodiments, decoding the signal received from the base station based on the first precoder information and the second precoder information comprises: decoding the second user equipment based on the second precoder information And removing, based on the decoded signal of the second user equipment, interference caused by the second user equipment; and decoding and removing the interfered signal based on the first precoder information.

In accordance with a third party aspect of the present disclosure, a method for enhancing feedback in multi-user overlay transmission employing closed-loop precoding includes: transmitting second channel status information to a base station; receiving from the base station for a second precoder information of the user equipment; and decoding the signal received from the base station based on the second precoder information.

In some embodiments, the second channel status information includes at least one of the following: a precoding matrix indication, a rank indication, and a channel quality indication.

In some embodiments, the second precoder information includes at least one of the following: a precoding matrix indication and a rank indication.

According to a fourth aspect of the present disclosure, there is provided an apparatus for enhancing feedback in a multi-user overlay transmission employing closed-loop precoding, comprising: a first receiving device configured to receive a first channel from a first user device Status information; a second receiving device configured to receive second channel state information from the paired second user device; and a selecting device configured to select based on the first channel state information and the second channel state information In this First precoder information of the first user equipment and second precoder information for the second user equipment.

In some embodiments, each of the first channel state information and the second channel state information comprises at least one of: a precoding matrix indication, a rank indication, and a channel quality indication.

In some embodiments, each of the first precoder information and the second precoder information comprises at least one of: a precoding matrix indication and a rank indication.

In some embodiments, the first user device and the second user device are located in the same cell, and wherein the first user device is closer to a center of the cell than the second user device.

In some embodiments, the device further includes: a first transmitting device configured to send the first precoder information and the second precoder information to the first user equipment; and a second transmitting device The second precoder information is configured to be sent to the second user equipment.

In some embodiments, the device further includes: a third sending device configured to send power allocation information to the first user equipment, so that the first user equipment feeds back the first channel based on the power allocation information Status information, the power allocation information is used to indicate power allocation between the first user equipment and the second user equipment.

In some embodiments, the third sending device is configured to send the plurality of power allocation information to the first user equipment, so that the first user equipment returns a plurality of first corresponding to the plurality of power allocation information. Channel status information.

In some embodiments, the selecting means is configured to: select the first precoder information for decoding the signal of the first user equipment at the first user equipment; and select for the first The second precoder information of the signal of the second user equipment is decoded at the user equipment and the second user equipment.

In some embodiments, the selecting means is further configured to: determine whether the first channel state information and the second channel state information match; and based on determining that the first channel state information and the second channel state information do not match, Performing at least one of the following operations: causing the first user device to be used for single-user transmission; and pairing the first user device with the third user device for multi-user overlay transmission.

According to a fifth aspect of the present disclosure, there is provided an apparatus for enhancing feedback in a multi-user superimposed transmission employing closed-loop precoding, comprising: a fourth transmitting apparatus configured to transmit first channel status information to a base station; a third receiving device configured to receive, from the base station, first precoder information for the first user equipment and second precoder information for the paired second user equipment; and the first decoding device Configuring to decode a signal received from the base station based on the first precoder information and the second precoder information, wherein the first user equipment and the second user equipment are located in the same cell, and The first user equipment is closer to the center of the cell than the second user equipment.

In some embodiments, the apparatus further includes: a fourth receiving device configured to receive power allocation information from the base station, the power allocation information being used to indicate between the first user equipment and the second user equipment Power distribution.

In some embodiments, the apparatus further comprises: obtaining means configured to obtain the first channel state information by measurement of a cell-specific reference signal based on the power allocation information.

In some embodiments, the fourth receiving device is configured to receive a plurality of power allocation information from the base station.

In some embodiments, the fourth transmitting device is configured to send, to the base station, a plurality of first channel state information corresponding to the plurality of power allocation information, wherein each of the first channel state information is respectively based on each power allocation The measurement of the cell-specific reference signal of the information is obtained.

In some embodiments, the first decoding device is configured to: decode the signal of the second user equipment based on the second precoder information; and remove the signal based on the decoded signal of the second user equipment And causing interference caused by the user equipment; and decoding and removing the interfered signal based on the first precoder information.

According to a sixth aspect of the present disclosure, there is provided an apparatus for enhancing feedback in a multi-user superimposed transmission employing closed-loop precoding, comprising: a fifth transmitting apparatus configured to transmit second channel status information to a base station; a fifth receiving device configured to receive second precoder information for the second user equipment from the base station; and second decoding means configured to decode from the base based on the second precoder information The signal received by the station.

Method and apparatus for enhancing feedback in multi-user overlay transmission employing closed-loop precoding, in accordance with an embodiment of the present disclosure, enabling a base station to Selecting appropriate precoder information from the channel status information reported by the paired user equipment and delivering the information to the paired user equipment, wherein the near/victim UE can decode the remote/interfering UE based on the precoder information. The resulting interference signal improves the accuracy of decoding its own PDSCH data by removing interfering signals caused by distant/interfering UEs.

200‧‧‧ method

300‧‧‧ method

400‧‧‧ method

500‧‧‧ equipment

501‧‧‧First receiving device

502‧‧‧second receiving device

503‧‧‧Selection device

600‧‧‧ equipment

601‧‧‧fourth transmitting device

602‧‧‧ Third receiving device

603‧‧‧First decoding device

700‧‧‧ Equipment

701‧‧‧ fifth transmitting device

702‧‧‧ fifth receiving device

703‧‧‧second decoding device

The drawings are intended to provide a further understanding of the present disclosure, and are intended to be a part of the present disclosure. In the drawings: FIG. 1 illustrates a schematic diagram of an environment 100 in which embodiments of the present disclosure can be implemented; FIG. 2 illustrates a multi-user overlay transmission employing closed-loop precoding in accordance with an embodiment of the present disclosure. Flowchart of a method 200 of enhancing feedback; FIG. 3 illustrates a flow diagram of a method 300 for enhancing feedback in multi-user overlay transmission employing closed-loop precoding, in accordance with an embodiment of the present disclosure; A flowchart of a method 400 for enhancing feedback in multi-user overlay transmission employing closed-loop precoding of an embodiment of the present disclosure; FIG. 5 illustrates multiple for employing closed-loop precoding in accordance with an embodiment of the present disclosure. a block diagram of the device 500 for enhancing feedback in the user overlay transmission; 6 illustrates a block diagram of an apparatus 600 for enhancing feedback in multi-user overlay transmission employing closed-loop precoding, in accordance with an embodiment of the present disclosure; and FIG. 7 illustrates for use in accordance with an embodiment of the present disclosure A block diagram of an apparatus 700 for enhancing feedback in a multi-user overlay transmission employing closed loop precoding.

In the various figures, the same or corresponding reference numerals indicate the same or corresponding parts.

Hereinafter, various exemplary embodiments of the present disclosure will be described in detail with reference to the drawings. It should be noted that these drawings and description are merely illustrative of the embodiments. It is to be noted that the alternative embodiments of the structures and methods disclosed herein are susceptible to the following description, and may be used without departing from the principles of the disclosure.

It is to be understood that the present invention is not intended to limit the scope of the present disclosure.

The terms "including", "comprising", and the like, and <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> are used herein to mean an open term, that is, "including/including but not limited to". The term "based on" is "based at least in part on." The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment." Relevant definitions of other terms will be given in the description below.

Hereinafter, a technical solution for enhancing feedback in multi-user superimposed transmission employing closed-loop precoding according to an embodiment of the present disclosure will be described in detail with reference to the drawings.

2 illustrates a flow diagram of a method 200 for enhancing feedback in multi-user overlay transmission employing closed loop precoding, in accordance with an embodiment of the present disclosure. As shown in FIG. 2, method 200 includes steps S201 through S203. The various steps of method 200 will now be described in detail in conjunction with FIGS. 1 and 2. Method 200 may be performed, for example, by the eNB in FIG. 1, in accordance with an embodiment of the present disclosure. As shown in Figure 1, UE1 and UE2 are paired UEs for multi-user overlay transmission. UE1 and UE2 are located in the same cell, and wherein UE1 is located at a position relative to the center of the cell, and UE2 is located at the edge of the cell.

At step S201, first channel status information is received from UE1. The first channel state information (CSI) may include a channel quality indication (CQI), a precoding matrix indication (PMI), and/or a rank indication (RI). The first CSI may be obtained by the UE1 by measuring the CRS delivered by the eNB.

According to an embodiment of the present disclosure, before step S201, the eNB may transmit power allocation information to the UE1, so that the UE1 performs CRS measurement using the power allocation information to obtain CSI. The fed back CSI is used to suggest to the eNB the most appropriate CQI, RMI and RI for the receiver of UE1. The power allocation information may, for example, indicate the power allocation between the paired UE1 and UE2. The eNB may also send multiple power allocation information to the UE1, so that the UE1 feeds back multiple first CSIs corresponding to multiple power allocation information. For example, multiple power allocation information sent to UE1 may be indicated in MUST The power allocation ratio between UE2 and UE1 is 90% and 10%, 80% and 20% or 70% and 30%, respectively. UE1 can correspondingly feed back multiple sets of CQI, RMI and RI to the eNB.

Likewise, in step S202, the second CSI is received from the paired UE2. The second CSI may also include CQI, PMI, and/or RI. The second CSI may be obtained by the UE 2 by measuring the CRS delivered by the eNB.

Next, the method 200 proceeds to step S203, selecting first precoder information for UE1 and second precoder information for UE2 based on the first CSI and the second CSI. Through steps S201 and S202, the eNB receives multiple sets of CQI, PMI and/or RI from UE1 and UE2, from which the eNB can select the first precoder information for decoding the signal of UE1 and the signal for decoding UE2. Two precoder information.

According to an embodiment of the present disclosure, the selected first precoder information may be used to decode the signal of UE1 itself at UE1, and the selected second precoder information may be used to decode the signal of UE2 itself at UE2. It can also be used to decode the signal of UE2 at UE1. This is because, as described above, UE1 and UE2 are user equipments that are paired for multi-user superimposed transmission, UE2 is located at the cell edge and may be allocated significantly higher than the transmission power of UE1, causing serious interference to UE1, so UE1 needs to first decode the signal of UE2 and then improve the accuracy of decoding its own signal by removing the signal of UE2 from the received signal.

According to an embodiment of the present disclosure, when the first CSI and the second CSI fed back to the eNB are the same, the first precoder information and the second precoder information may be determined according to PMIs and RIs included in the same CSI. when When the first CSI and the second CSI fed back to the eNB are different, for example, the PMI and RI that may be included in the CSI (ie, the second CSI) fed back by the UE 2 enable the UE1 to decode the signal of the UE 2 and have a sufficiently high signal to noise. In the case of ratio, it is used as the second precoder information for decoding the signal of UE2 at UE1 and UE2. Further, for example, the selected first precoder information and the second precoder information may have the same PMI, and the same or different RIs and the like.

According to an embodiment of the present disclosure, step S203 may further comprise determining whether the first CSI and the second CSI match, ie determining whether the UE2 can be selected for decoding at the UE1 in addition to the signal suitable for decoding the UE2 itself at the UE2. Precoder information for the signal. When determining that the first CSI and the second CSI do not match, that is, it is determined that the precoder information suitable for decoding the signal of UE2 at UE1 is not selected, in addition to the signal suitable for decoding UE2 itself at UE2, the eNB UE1 may be selected for single-user transmission; or the eNB may also pair UE1 with another distant UE (e.g., UE3) for multi-user overlay transmission. In this way, the eNB can dynamically switch between single-user transmission (ie SU-MIMO), multi-user transmission or different pairing between the near UE and different distant UEs according to the CSI fed back by the UE, ie each The utilization of physical resources (PRBs) may have various combinations, for example, may be used for MUST, SU-MIMO, UE1 and UE2 pairing, UE1 and UE3 pairing, MUST of layer 1, or MUST of layer 1 and layer 2, and the like.

According to an embodiment of the present disclosure, the method 200 further includes transmitting the first precoder information and the second precoder information to the UE1 to enable the UE1 to It is sufficient to decode the signal of UE2 using the second precoder information, and then decode its own signal using the first precoder information by removing the signal of UE2 from the received signal. Moreover, the method 200 further includes transmitting the second precoder information to the UE 2 such that the UE 2 utilizes the second precoder information to decode its own signal.

So far, method 200 ends.

FIG. 3 illustrates a flow diagram of a method 300 for enhancing feedback in multi-user overlay transmission employing closed loop precoding, in accordance with an embodiment of the present disclosure. As shown in FIG. 3, method 300 includes steps S301 through S303. The steps of method 300 will now be described in detail in conjunction with FIGS. 1 and 3. Method 300 may be performed, for example, by UE1 in FIG. 1, in accordance with an embodiment of the present disclosure.

In step S301, the first CSI is transmitted to the eNB. The first CSI may include CQI, PMI, and/or RI. The first CSI may be obtained by the UE1 by measuring the CRS delivered by the eNB.

According to an embodiment of the present disclosure, before step S301, the UE1 may receive power allocation information specific to the UE1 from the eNB. UE1 can use the power allocation information to perform CRS measurement to obtain CSI and feed back to the eNB. The fed back CSI (ie, the first CSI) is used to suggest to the eNB the most appropriate CQI, RMI, and RI for the UE1's receiver. The power allocation information may, for example, indicate the power allocation between the paired UE1 and UE2. A plurality of power allocation information may be received from the eNB to feed back a plurality of first CSIs corresponding to the plurality of power allocation information. For example, multiple power allocation information received from the eNB may indicate between UE2 and UE1 during MUST The power allocation ratios are 90% and 10%, 80% and 20% or 70% and 30%, respectively. UE1 can correspondingly feed back multiple sets of CQI, RMI and RI to the eNB.

In accordance with an embodiment of the present disclosure, in order to allow an eNB to determine channel state information for downlink multi-user overlay transmission, the paired UE may report to the eNB corresponding to different hypotheses (eg, regarding different power allocation scenarios and potential codebooks) Multiple sets of CQI, PMI, and/or RI for restrictions, etc., for selection of a precoder matrix for MUST at the eNB. For example, UE1 may feed back to the eNB multiple sets of CQI, PMI, and/or RI based on CRS measurements utilizing different power allocation hypotheses. UE1 may also be configured with an additional set of power allocation indications, for example, which may require UE1 to obtain and report CSI for all possible power allocation hypotheses. Note that "all possible power allocation assumptions" refer to all scenarios with available power allocation indications for UE1, ie, in these scenarios, UE1 can still obtain acceptable values with a sufficiently high signal-to-noise ratio (SNR). performance.

Furthermore, according to an embodiment of the present disclosure, the UE 1 may be configured to report CSI to the eNB in a specific time interval or timing triggered manner, for example, by configuring a parameter codebooksubsetrestriction (indicating a subset of the precoding codebooks used to be used) )to realise.

Next, the method 300 proceeds to step S302, receiving first precoder information for the UE1 and second precoder information for the paired UE2 from the eNB. As described above, after receiving multiple sets of CQIs, PMIs, and/or RIs from the paired UEs, the eNB may select an eNB for decoding. First precoder information of the signal of UE1 and second precoder information for decoding the signal of UE2, the selected first precoder information can be used to decode the signal of UE1 itself at UE1, and the selected The second precoder information can be used to decode the signal of UE2 at UE1 in addition to decoding the UE2's own signal at UE2. The eNB may send the selected first precoder information and the second precoder information to the UE1. Therefore, at step S302, UE1 may receive first precoder information and second precoder information from the eNB.

Next, the method proceeds to step S303, and the signal received from the eNB is decoded based on the first precoder information and the second precoder information. As described above, by step S301 and step S302, UE1 receives the first precoder information selected by the eNB for decoding the signal of UE1 and the second precoder information for decoding the signal of UE2, the first precoding The device information can be used to decode the signal of UE1 itself at UE1 and the second precoder information can be used to decode the signal of UE2 at UE1 in addition to the signal that can be used to decode UE2 itself at UE2. Therefore, UE1 can decode the signal of UE2 based on the second precoder information; then remove the interference caused by the second user equipment based on the decoded signal of UE2; and decode the interference after removing the interference based on the first precoder information Its own signal.

At this point, method 300 ends.

4 illustrates a flow diagram of a method 400 for enhancing feedback in multi-user overlay transmission employing closed loop precoding, in accordance with an embodiment of the present disclosure. As shown in FIG. 4, method 400 includes steps S401 and S402. just now The steps of method 400 will be described in detail in conjunction with FIGS. 1 and 4. Method 400 may be performed, for example, by UE 2 in FIG. 1 in accordance with an embodiment of the present disclosure.

At step S401, UE2 transmits a second CSI to the eNB. The second CSI may also include CQI, PMI, and/or RI. The second CSI may be obtained by the UE 2 by measuring the CRS delivered by the eNB. As described above, after receiving multiple sets of CQI, PMI, and/or RI from the paired UE, the eNB may select first precoder information for decoding the signal of UE1 and second preamble for decoding the signal of UE2. Encoder information, and the second precoder information is sent to UE2. Accordingly, at step S402, UE2 may receive second precoder information from the eNB and decode its received PDSCH signal based on the received second precoder information at step S403. At this point, method 400 ends.

FIG. 5 illustrates a block diagram of an apparatus 500 for enhancing feedback in multi-user overlay transmission employing closed loop precoding, in accordance with an embodiment of the present disclosure. As shown in FIG. 5, the device 500 includes a first receiving device 501 configured to receive first channel state information from a first user device, and a second receiving device 502 configured to receive a second user device from a pair. Two-channel status information; and selection means 503 configured to select first precoder information for the first user equipment and for the second user equipment based on the first channel status information and the second channel status information Second precoder information.

According to an embodiment of the present disclosure, each of the first channel state information and the second channel state information includes at least one of the following: a precoding matrix finger Indicator, rank indication, and channel quality indication.

According to an embodiment of the present disclosure, each of the first precoder information and the second precoder information includes at least one of the following: a precoding matrix indication and a rank indication.

According to an embodiment of the present disclosure, the first user device and the second user device are located in the same cell, and wherein the first user device is closer to the center of the cell than the second user device.

According to an embodiment of the present disclosure, the device 500 further includes: a first transmitting device configured to send the first precoder information and the second precoder information to the first user equipment; and a second transmitting device configured to Sending second precoder information to the second user equipment.

According to an embodiment of the present disclosure, the device 500 further includes: a third sending device, configured to send power allocation information to the first user equipment, so that the first user equipment feeds back the first channel state information based on the power allocation information, The power allocation information is used to indicate power allocation between the first user equipment and the second user equipment.

According to an embodiment of the present disclosure, the third transmitting device is configured to send the plurality of power allocation information to the first user equipment, so that the first user equipment returns a plurality of first channel state information corresponding to the plurality of power allocation information .

According to an embodiment of the present disclosure, the selection means 503 is configured to: select first precoder information for decoding a signal of the first user equipment at the first user equipment; and select for use in the first user equipment Decoding a second precoding of the signal of the second user equipment at the second user equipment Information.

According to an embodiment of the present disclosure, the selecting means 503 is further configured to: determine whether the first channel state information and the second channel state information match; and perform the following operations based on determining that the first channel state information and the second channel state information do not match; At least one of: causing the first user device to be used for single-user transmission; and pairing the first user device with the third user device for multi-user overlay transmission.

FIG. 6 illustrates a block diagram of an apparatus 600 for enhancing feedback in multi-user overlay transmission employing closed loop precoding, in accordance with an embodiment of the present disclosure. As shown in FIG. 6, the device 600 includes a fourth transmitting device configured to send first channel status information to the base station, and a third receiving device configured to receive the first pre-first user device from the base station Encoder information and second precoder information for the paired second user equipment; and first decoding means configured to decode from the base station based on the first precoder information and the second precoder information The signal to which the first user device and the second user device are located in the same cell, and wherein the first user device is closer to the center of the cell than the second user device.

According to an embodiment of the present disclosure, the apparatus 600 further includes: a fourth receiving device configured to receive power allocation information from the base station, the power allocation information being used to indicate power allocation between the first user equipment and the second user equipment .

According to an embodiment of the present disclosure, the apparatus 600 further includes: acquisition means configured to obtain the first channel state information by measurement of the cell-specific reference signal based on the power allocation information.

According to an embodiment of the present disclosure, the fourth receiving device is configured to receive a plurality of power allocation information from the base station.

According to an embodiment of the present disclosure, the fourth transmitting device is configured to transmit, to the base station, a plurality of first channel state information corresponding to the plurality of power allocation information, wherein each of the first channel state information respectively passes the information based on each power allocation The measurement of the cell-specific reference signal is obtained.

According to an embodiment of the present disclosure, the first decoding device is configured to: decode a signal of the second user equipment based on the second precoder information; and remove the second user device based on the decoded signal of the second user equipment The interference caused; and decoding and removing the interfered signal based on the first precoder information.

FIG. 7 illustrates a block diagram of an apparatus 700 for enhancing feedback in multi-user overlay transmission employing closed loop precoding, in accordance with an embodiment of the present disclosure. As shown in FIG. 7, the device 700 includes a fifth transmitting device 701 configured to transmit second channel status information to the base station, and a fifth receiving device 702 configured to receive the second user device from the base station. The second precoder information; and the second decoding means 703 are configured to decode the signal received from the base station based on the second precoder information.

In summary, according to an embodiment of the present disclosure, there is provided a method and apparatus for enhancing feedback in multi-user overlay transmission employing closed-loop precoding so that a base station can report a channel from a paired user equipment The appropriate precoder information is selected in the status information and sent to the paired user equipment, wherein the near/victim UE can decode the interference signal caused by the remote/interfering UE based on the precoder information, and Department / Interfering with interference signals caused by the UE to improve the accuracy of decoding its own PDSCH data.

In general, the various example embodiments of the present disclosure can be implemented in hardware or special purpose circuits, software, logic, or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that can be executed by a controller, microprocessor or other computing device. When the various aspects of the embodiments of the present disclosure are illustrated or described as a block diagram, a flowchart, or some other graphical representation, it will be understood that the blocks, devices, systems, techniques, or methods described herein may be non-limiting. Examples are implemented in hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controllers or other computing devices, or some combination thereof.

Furthermore, the various blocks in the flowcharts can be seen as a method step, and/or an operation generated by operation of a computer program code, and/or as a plurality of coupled logic circuit elements that perform related functions. For example, embodiments of the present disclosure include a computer program product comprising a computer program tangibly embodied on a machine readable medium, the computer program comprising a code configured to implement the methods described above.

Within the context of the disclosure, a machine-readable medium can be any tangible medium that can contain or store a program for use with or in connection with an instruction execution system, apparatus, or device. The machine readable medium can be a machine readable signal medium or a machine readable storage medium. A machine-readable medium can include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination thereof. More detailed examples of machine readable storage media include electrical connections with one or more wires, portable computer magnetics Chip, hard disk, random access memory (RAM), read only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical storage device, magnetic storage device, or Any suitable combination thereof.

Computer program code for implementing the methods of the present disclosure can be written in one or more programming languages. The computer program code can be provided to a processor of a general purpose computer, a special purpose computer or other programmable data processing device such that the program code is caused by the flow chart and/or when executed by a computer or other programmable data processing device. The functions/operations specified in the block diagram or are implemented. The code can be executed entirely on the computer, partly on the computer, as a stand-alone package, partly on the computer and partly on the remote computer or entirely on the remote computer or server.

In addition, although the operations are depicted in a particular order, this should not be understood as requiring such operations to be performed in a particular order or in a sequential order, or all illustrated operations are performed to obtain the desired results. In some cases, multiplex or parallel processing can be beneficial. As such, the present invention is not to be construed as limiting the scope of the invention. Certain features that are described in this specification in the context of separate embodiments can also be implemented in a single embodiment. Conversely, various features that are described in the context of a single embodiment can be implemented in various embodiments or in any suitable sub-combination.

Various modifications and changes to the foregoing exemplary embodiments of the present disclosure will become apparent to those skilled in the related art obvious. Any and all modifications will still fall within the scope of the non-limiting and exemplary embodiments of the present disclosure. In addition, the foregoing description and drawings are inferred to the benefit of the embodiments of the invention.

It is understood that the embodiments of the present disclosure are not limited to the specific embodiments disclosed, and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are used herein, they are used in a generic and descriptive sense and not for the purpose of limitation.

200‧‧‧ method

Claims (15)

A method for enhancing feedback in a multi-user overlay transmission employing closed-loop precoding, comprising: receiving first channel state information from a first user device; and receiving second channel state information from a paired second user device; And selecting, based on the first channel state information and the second channel state information, first precoder information for the first user equipment and second precoder information for the second user equipment. The method of claim 1, wherein the first user device and the second user device are located in the same cell, and wherein the first user device is closer to the second user device than the second user device The center of the community. The method of claim 2, further comprising: transmitting the first precoder information and the second precoder information to the first user equipment; and transmitting the first to the second user equipment Two precoder information. The method of claim 2, further comprising: transmitting power allocation information to the first user equipment, so that the first user equipment feeds back the first channel state information based on the power allocation information, The power allocation information is used to indicate a power allocation between the first user equipment and the second user equipment. The method of claim 4, wherein the transmitting the power allocation information to the first user equipment comprises: Sending, to the first user equipment, a plurality of power allocation information, so that the first user equipment returns a plurality of first channel state information corresponding to the multiple power allocation information. The method of claim 2, wherein the first precoder information for the first user equipment is selected and used for the second based on the first channel state information and the second channel state information The second precoder information of the user equipment includes: selecting the first precoder information for decoding the signal of the first user equipment at the first user equipment; and selecting for use in the first use The second precoder information of the signal of the second user equipment is decoded at the device and the second user equipment. The method of claim 2, wherein the first precoder information for the first user equipment is selected and used for the second based on the first channel state information and the second channel state information The second precoder information of the user equipment further includes: determining whether the first channel state information and the second channel state information match; and performing, based on determining that the first channel state information and the second channel state information do not match, performing At least one of the following operations: causing the first user device to be used for single-user transmission; and pairing the first user device with the third user device for multi-user overlay transmission. A method for enhancing feedback in multi-user overlay transmission employing closed-loop precoding, comprising: Transmitting, to the base station, first channel status information; receiving, from the base station, first precoder information for the first user equipment and second precoder information for the paired second user equipment; and First precoder information and the second precoder information to decode signals received from the base station, wherein the first user equipment and the second user equipment are located in the same cell, and wherein the first user The device is closer to the center of the cell than the second user device. The method of claim 8, further comprising: receiving power allocation information from the base station, the power allocation information being used to indicate power allocation between the first user equipment and the second user equipment. The method of claim 9, further comprising: obtaining the first channel state information by measurement of a cell-specific reference signal based on the power allocation information. The method of claim 8, wherein decoding the signal received from the base station based on the first precoder information and the second precoder information comprises: based on the second precoder information Decoding the signal of the second user equipment; removing interference caused by the second user equipment based on the decoded signal of the second user equipment; and decoding and removing the interference based on the first precoder information letter number. A method for enhancing feedback in multi-user overlay transmission employing closed-loop precoding, comprising: transmitting second channel status information to a base station; receiving a second precoder for a second user equipment from the base station Information; and decoding the signal received from the base station based on the second precoder information. An apparatus for enhancing feedback in a multi-user overlay transmission employing closed-loop precoding, comprising: a first receiving device configured to receive first channel state information from a first user device; and a second receiving device configured Receiving second channel status information from the paired second user device; and selecting means configured to select the first for the first user device based on the first channel status information and the second channel status information Precoder information and second precoder information for the second user device. An apparatus for enhancing feedback in a multi-user overlay transmission employing closed-loop precoding, comprising: a fourth transmitting device configured to transmit first channel state information to a base station; and a third receiving device configured to The base station receives first precoder information for the first user equipment and a second user for pairing a second precoder information of the device; and a first decoding device configured to decode a signal received from the base station based on the first precoder information and the second precoder information, wherein the first use The device and the second user device are located in the same cell, and wherein the first user device is closer to the center of the cell than the second user device. An apparatus for enhancing feedback in a multi-user overlay transmission employing closed-loop precoding, comprising: a fifth transmitting device configured to transmit second channel status information to a base station; and a fifth receiving device configured to The base station receives second precoder information for the second user equipment; and second decoding means configured to decode the signal received from the base station based on the second precoder information.