WO2017028673A1 - Procédé et dispositif de notification et de détermination de ports dmrs ou d'une relation de mappage - Google Patents

Procédé et dispositif de notification et de détermination de ports dmrs ou d'une relation de mappage Download PDF

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Publication number
WO2017028673A1
WO2017028673A1 PCT/CN2016/092691 CN2016092691W WO2017028673A1 WO 2017028673 A1 WO2017028673 A1 WO 2017028673A1 CN 2016092691 W CN2016092691 W CN 2016092691W WO 2017028673 A1 WO2017028673 A1 WO 2017028673A1
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Prior art keywords
scid
receiving end
dmrs port
mapping relationship
different
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PCT/CN2016/092691
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English (en)
Chinese (zh)
Inventor
张淑娟
陈艺戬
李儒岳
刘文豪
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中兴通讯股份有限公司
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Priority claimed from CN201510626635.7A external-priority patent/CN106470088B/zh
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US15/752,477 priority Critical patent/US10841058B2/en
Publication of WO2017028673A1 publication Critical patent/WO2017028673A1/fr
Priority to US17/081,795 priority patent/US11522655B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received

Definitions

  • the present invention relates to the field of communications, and in particular, to a notification, determination method, and apparatus for a DMRS port or mapping relationship.
  • the number of antennas at the base station side is increasing, such as in Full-dimension-Multiple-Input Multiple-Output (FD-MIMO) and high-frequency communication.
  • the number of antennas at the base station increases from 8 to 16, 32, 64 or even more.
  • the number of antennas does not increase exponentially due to the cost of the receiving end, and there are many antennas under the multi-antenna base station.
  • the performance advantage of the number of base station antennas can not be fully utilized. .
  • MUI Multi-User Interference
  • Table 1 in LTE-Rel12, in the 2C and 2D of Downlink Control Information (DCI), the joint coding result of the layer number, port, and scrambling code supports 2 layers of orthogonal 2 layers. Pseudo-orthogonal MU-MIMO transmission.
  • DCI Downlink Control Information
  • DMRS De Modulation Reference Signal
  • Table 1 the combination of the number of layers, ports, and scrambling codes is represented by more bits, while supporting single-user Multiple-Input Multiple-Output (SU-MIMO) or MU-MIMO dynamic switching.
  • SU-MIMO Single-user Multiple-Input Multiple-Output
  • MU-MIMO dynamic switching Support more DMRS port orthogonality of MU-MIMO receiver.
  • TM transmission mode
  • the multi-layer MU-MIMO transmission in the actual scenario has a certain proportion, and for all scenarios, the expansion of Table 1 in the DCI is notified, which causes unnecessary waste of DCI resources.
  • the embodiment of the present invention provides a notification, determination, and apparatus for a DMRS port or a mapping relationship, so as to at least solve the related art, after the total number of MU-MIMO transmissions is increased, the orthogonal DMRS port for MU-MIMO is limited.
  • the high MUI interference results in a problem that the channel estimation performance is not high, so that the performance of the MU-MIMO system cannot be fully utilized.
  • a method for notifying a reference signal DMRS port including:
  • the sending end sends the indication information to the receiving end, where the sending end indicates the allocation information of the DMRS port by using the indication information, where the indication information includes at least one of the following: radio resource control RRC signaling; physical layer The new data indicates the NDI bit; the DMRS pilot scrambling configuration information n scid .
  • the sending end indicates, by using the indication information, that the allocation information of the DMRS port includes:
  • the transmitting end and the receiving end appoint N DMRS port groups, and the sending end uses the RRC signaling or physical layer NDI bit to indicate the DMRS port group allocation information, the RRC signaling or the physical layer
  • the different indication information values indicated by the NDI bits correspond to different DMRS port groups, wherein the DMRS ports in the DMRS port group are different in sequence corresponding to different port groups, and N is a positive integer greater than 1.
  • the sending end indicates, by using the indication information, that the allocation information of the DMRS port includes:
  • the transmitting end indicates port allocation information in the DMRS port group by using port allocation signaling of the physical layer.
  • the sending end indicates, by using the indication information, that the allocation information of the DMRS port includes:
  • the transmitting end notifies the DMRS port allocation information and the M-1 other information by using M information joint coding, where M is a positive integer, and the M-1 other information includes at least one of the following: DMRS guide Frequency scrambling code configuration information n scid information, layer number indication information at the receiving end;
  • N n scids correspond to N different DMRS port groups, where r is 1 or 2, and N is a positive integer greater than 1.
  • the sending end indicates, by using the indication information, that the allocation information of the DMRS port includes:
  • the sending end notifies the receiving end that the correspondence between the n scid and the DMRS port group is enabled, and further indicates the allocation information of the DMRS port, and the enabling indication information is notified by one or more of the following manners. : Notification by high-level signaling; NDI notification through the transport block; fixed enable, where N n scid values are bound to N DMRS port groups in joint coding, and N is a positive integer greater than 1.
  • the N n scid values correspond to N DMRS port groups; the correspondence between the n scid and the DMRS port group at the receiving end is not enabled. There is no correspondence between the n scid and the DMRS port group.
  • the initialization value of the DMRS random sequence is obtained according to the following formula:
  • n s is the subframe number, Or f(n scid ) ⁇ 0,1,2,3 ⁇ , where n scid ⁇ 0,1,2,3 ⁇ represents the scrambling code ID, where It is the virtual cell ID used by the terminal for DMRS demodulation, and g(n SCID ) is the correction value of n SCID .
  • the candidate values are notified by higher layer signaling, and the high layer signaling configures different candidate values for different codeword numbers.
  • the f(n SCID ) used to calculate c init is corrected to one of the following ways:
  • the g(n SCID ) used to calculate c init is corrected to one of the following ways:
  • g(n SCID ) xor(g(n SCID ),1);
  • different NDI values of the unenabled codewords indicate the different DMRS port groups, and the number of DMRS port groups is equal to the number of different NDI values.
  • different n_scid values in the DCI indicate the different DMRS port groups, and the number of DMRS port groups is equal to the number of different n_scid values.
  • a method for notifying a mapping relationship including: in a transmission mode, the sending end sends a notification message to the receiving end, where the receiving end is in multiple mapping according to the notification information.
  • a mapping relationship is selected, wherein the mapping relationship refers to a mapping relationship between a joint encoding domain value set and a joint encoded content set, and the sending method of the notification message includes at least one of the following manners:
  • the transport block modulation and one or more bits of the coding strategy MCS bit field are notified.
  • the method further includes:
  • the indication that the mapping relationship bit occupies one or more least significant bit LSB bits of the bit field When the number of bits indicating the mapping relationship is less than the number of bits in the bit field, the indication that the mapping relationship bit occupies one or more least significant bit LSB bits of the bit field.
  • the new data by the transport block indicates that the NDI notifies the different mapping relationships, including:
  • the NDI different value of the unenabled transport block indicates different mapping relationships
  • the transport block is not enabled in the downlink DCI notification, indicating that the different mapping relationship includes one of the following: fixedly selecting one mapping relationship; selecting any one of N mapping relationships; using the first enabled transport block
  • the NDI indicates a different mapping relationship; the NDI using the second enabled transport block indicates a different mapping relationship; the NDI joint using all enabled transport blocks indicates a different mapping relationship.
  • the joint coding of the joint coding domain comprises one of the following:
  • the joint coding is a joint coding of a DMRS port of the receiving end, a physical downlink shared channel PDSCH layer of the receiving end, and a scrambling code n scid of the DMRS port of the receiving end;
  • the joint coding is a joint coding including a DMRS port of the receiving end, a PDSCH layer of the receiving end, a scrambling code n scid of the DMRS port of the receiving end, and a DMRS power of the receiving end.
  • the joint coding indicates the joint coding of the DMRS port of the receiving end, the PDSCH layer of the receiving end, and the scrambling code n scid of the DMRS port of the receiving end
  • the joint coded content represents a combination of a DMRS port value of the receiving end, a PDSCH layer value of the receiving end, and a DMRS port scrambling code n scid value of the receiving end, and all possible combinations of the three constitute a joint encoded content total set;
  • the jointly coded content represents a combination of the DMRS port value of the receiving end, the PDSCH layer value of the receiving end, and the DMRS port scrambling code n scid value of the receiving end, and all possible combinations of the four constitute the combined coded content total set.
  • mapping relationship between the set of values of the joint coding domain and the joint coded content set satisfies at least one of the following features:
  • the number of bits of the joint coding domain corresponding to different mapping relationships is the same;
  • the same bit value of the joint coding domain corresponds to one transport block and two transport blocks as two different values
  • the mapping relationship is a one-to-one mapping relationship.
  • the value set of the joint coding domain in a mapping relationship is a subset of the total number of joint coding values, and the coded content set in a mapping relationship is the total content of the coded content. a subset;
  • the same value of the joint coding domain is either the same or different in the joint coding content represented in the different mapping relationship.
  • mapping relationships and the number of mapping relationships are known in advance by the receiving end and the transmitting end;
  • mapping relationship indication information is pre-agreed by the receiving end and the sending end.
  • a method for determining a demodulation reference signal DMRS port including:
  • the receiving end receives the indication information sent by the sending end, and the receiving end determines, by using the indication information, the DMRS port used by the receiving end for the data demodulation, where the indication information includes at least the following One: radio resource control RRC signaling; physical layer new data indicates NDI bit; DMRS pilot scrambling code configuration information n scid .
  • the receiving end determines, by using the indication information, that the DMRS port used by the receiving end for the data demodulation of the current subframe includes:
  • the transmitting end and the receiving end appoint N DMRS port groups, N>1 and N are positive integers, and the receiving end obtains the DMRS port group of the receiving end by one or more of the following information:
  • the receiving end determines DMRS port group information according to n scid ;
  • the receiving end acquires DMRS port group information by using NDI signaling
  • the receiving end determines the DMRS port group information according to whether n scid and n scid are combined with the DMRS port group mapping enable information;
  • the receiving end After the receiving end obtains the DMRS port group information, the receiving end further combines the group of the physical layer signaling
  • the inner DMRS port configuration information determines the DMRS port that the current subframe uses for data demodulation.
  • the initialization value of the DMRS random sequence is obtained according to the following formula:
  • n s is the subframe number, Or f(n scid ) ⁇ 0,1,2,3 ⁇ , where n scid ⁇ 0,1,2,3 ⁇ represents the scrambling code ID, where It is the virtual cell ID used by the terminal for DMRS demodulation, and g(n SCID ) is the correction value of n SCID .
  • the candidate values are notified by higher layer signaling, and the high layer signaling configures different candidate values for different codeword numbers.
  • the f(n SCID ) used to calculate c init is corrected to one of the following ways:
  • the g(n SCID ) used to calculate c init is corrected to one of the following ways:
  • g(n SCID ) xor(g(n SCID ),1);
  • different NDI values of the unenabled codewords indicate the different DMRS port groups, and the number of DMRS port groups is equal to the number of different NDI values.
  • different n_scid values in the DCI indicate the different DMRS port groups, and the number of DMRS port groups is equal to the number of different n_scid values.
  • a method for determining a mapping relationship including:
  • the receiving end receives the notification message sent by the sending end, and the receiving end selects a mapping relationship among the multiple mapping relationships according to the notification information, where the mapping relationship refers to the numerical set and joint coding of the joint coding domain.
  • the mapping relationship between the content sets is obtained according to the value of the joint coding domain, and the jointly encoded content is obtained by referring to the selected mapping relationship, and the notification information includes at least one of the following information:
  • the new data of the transport block indicates the NDI
  • One or more bit notifications in the MCS bit field of the transport block are One or more bit notifications in the MCS bit field of the transport block.
  • the method further includes:
  • the indication that the mapping relationship bit occupies one or more least significant bit LSB bits of the bit field When the number of bits indicating the mapping relationship is less than the number of bits in the bit field, the indication that the mapping relationship bit occupies one or more least significant bit LSB bits of the bit field.
  • the joint coding of the joint coding domain comprises one of the following:
  • the joint coding is a joint coding of a DMRS port of the receiving end, a physical downlink shared channel PDSCH layer of the receiving end, and a scrambling code n scid of the DMRS port of the receiving end;
  • the joint coding is a joint coding including a DMRS port of the receiving end, a PDSCH layer of the receiving end, a scrambling code n scid of the DMRS port of the receiving end, and a DMRS power of the receiving end.
  • the joint coding indicates the joint coding of the DMRS port of the receiving end, the number of PDSCH layers of the receiving end, and the scrambling code n scid of the DMRS port of the receiving end
  • the joint coded content represents a combination of a DMRS port value of the receiving end, a PDSCH layer value of the receiving end, and a DMRS port scrambling code n scid value of the receiving end, and all possible combinations of the three constitute a joint encoded content total set;
  • the jointly coded content represents a combination of the DMRS port value of the receiving end, the PDSCH layer value of the receiving end, and the DMRS port scrambling code n scid value of the receiving end, and all possible combinations of the four constitute the combined coded content total set.
  • mapping relationship between the value set of the joint coding domain and the joint coded content set satisfies at least one of the following features:
  • the number of bits of the joint coding domain corresponding to different mapping relationships is the same;
  • the same bit value of the joint coding domain corresponds to one transport block and two transport blocks as two different values
  • the mapping relationship is a one-to-one mapping relationship.
  • the value set of the joint coding domain in a mapping relationship is a subset of the total number of joint coding values, and the coded content set in a mapping relationship is the total content of the coded content. a subset;
  • the joint coded content of the same value of the joint code domain in different mapping relationships is either the same or different;
  • mapping relationships and the number of mapping relationships are known in advance by the receiving end and the transmitting end;
  • mapping relationship indication information is pre-agreed by the receiving end and the sending end.
  • a notification device for demodulating a reference signal DMRS port located at the transmitting end, comprising:
  • the first sending module is configured to: in a transmission mode, the sending end sends the indication information to the receiving end, where the sending end indicates the allocation information of the DMRS port by using the indication information, where the indication information includes at least one of the following: a radio resource Controlling RRC signaling; physical layer new data indicating NDI bits; DMRS pilot scrambling code configuration information n scid .
  • the initialization value of the DMRS random sequence is obtained according to the following formula:
  • n s is the subframe number, Or f(n scid ) ⁇ 0,1,2,3 ⁇ , where n scid ⁇ 0,1,2,3 ⁇ represents the scrambling code ID, where It is the virtual cell ID used by the terminal for DMRS demodulation, and g(n SCID ) is the correction value of n SCID .
  • the candidate values are notified by higher layer signaling, and the high layer signaling configures different candidate values for different codeword numbers.
  • the f(n SCID ) used to calculate c init is corrected to one of the following ways:
  • the g(n SCID ) used to calculate c init is corrected to one of the following ways:
  • g(n SCID ) xor(g(n SCID ),1);
  • NDI values of the unenabled codewords indicate the different DMRS port groups, and the number of DMRS port groups is equal to the number of different NDI values;
  • n_scid values in the DCI indicate the different DMRS port groups, and the number of DMRS port groups is equal to the number of different n_scid values.
  • a notification device which is located at the sending end, and includes:
  • the second sending module is configured to: in a transmission mode, the sending end sends a notification message to the receiving end, where the receiving end selects a mapping relationship among the multiple mapping relationships according to the notification information, where the mapping relationship refers to the joint relationship And a mapping relationship between the code domain value set and the joint coded content set, where the notification message is sent by at least one of the following manners:
  • the transport block modulation and one or more bits of the coding strategy MCS bit field are notified.
  • a determining apparatus for demodulating a reference signal DMRS port located at a receiving end, comprising:
  • the first receiving module is configured to receive, in a transmission mode, the receiving end receives the indication information sent by the sending end, and the receiving end determines, by using the indication information, the DMRS port used by the receiving end for the data demodulation of the current subframe.
  • the indication information includes at least one of the following: radio resource control RRC signaling; physical layer new data indicating NDI bits; DMRS pilot scrambling code configuration information n scid .
  • the initialization value of the DMRS random sequence is obtained according to the following formula:
  • n s is the subframe number, Or f(n scid ) ⁇ 0,1,2,3 ⁇ , where n scid ⁇ 0,1,2,3 ⁇ represents the scrambling code ID, where It is the virtual cell ID used by the terminal for DMRS demodulation, and g(n SCID ) is the correction value of n SCID .
  • the candidate values are notified by higher layer signaling, and the high layer signaling configures different candidate values for different codeword numbers.
  • the f(n SCID ) used to calculate c init is corrected to one of the following ways:
  • the g(n SCID ) used to calculate c init is corrected to one of the following ways:
  • g(n SCID ) xor(g(n SCID ),1);
  • different NDI values of the unenabled codewords indicate the different DMRS port groups, and the number of DMRS port groups is equal to the number of different NDI values.
  • different n_scid values in the DCI indicate the different DMRS port groups, and the number of DMRS port groups is equal to the number of different n_scid values.
  • a determining device for determining a mapping relationship is further disposed at a receiving end. Among them, including:
  • the second receiving module is configured to receive, in a transmission mode, the receiving end receives a notification message sent by the sending end, and the receiving end selects a mapping relationship among the multiple mapping relationships according to the notification information, where the mapping relationship refers to joint coding.
  • the mapping relationship between the value set of the domain and the jointly encoded content set is obtained according to the value of the joint coding domain, and the joint coding content is obtained by referring to the selected mapping relationship, and the notification information includes at least one of the following information:
  • the new data of the transport block indicates the NDI
  • One or more bit notifications in the MCS bit field of the transport block are One or more bit notifications in the MCS bit field of the transport block.
  • the transmitting end sends the indication information to the receiving end, and the sending end indicates the allocation information of the DMRS port or the mapping relationship by using the indication information, and the indication information includes at least one of the following: the radio resource Controlling RRC signaling; physical layer new data indicating NDI bits; DMRS pilot scrambling code configuration information n scid , which solves the problem that when the total number of MU-MIMO transmissions is increased, the orthogonal DMRS ports for MU-MIMO transmission are limited,
  • the invention saves the signaling overhead, supports the SU-MIMO/MU-MIMO dynamic handover, and improves the flexibility of the base station configuration during the MU-MIMO transmission.
  • MUI interference in channel estimation is effectively suppressed, channel estimation performance
  • FIG. 1 is a flowchart of a method for notifying a reference signal DMRS port according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for notifying a mapping relationship according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method for determining a demodulation reference signal DMRS port according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a method for determining a mapping relationship according to an embodiment of the present invention
  • FIG. 5 is a structural block diagram of a notification apparatus for demodulating a reference signal DMRS port according to an embodiment of the present invention
  • FIG. 6 is a structural block diagram of a notification device for mapping relationship according to an embodiment of the present invention.
  • FIG. 7 is a structural block diagram of a determining apparatus for demodulating a reference signal DMRS port according to an embodiment of the present invention.
  • FIG. 8 is a structural block diagram of a device for determining a mapping relationship according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of a method for notifying a reference signal DMRS port according to an embodiment of the present invention. The process includes the following steps:
  • Step S102 In a transmission mode, the sending end sends the indication information to the receiving end, where the sending end indicates the allocation information of the DMRS port by using the indication information, where the indication information includes at least one of the following: radio resource control RRC signaling; physical layer The new data indicates the NDI bit; the DMRS pilot scrambling code configuration information n scid ;
  • the sending end sends the indication information to the receiving end, and the sending end indicates the allocation information of the DMRS port by using the indication information
  • the indication information includes at least one of the following: radio resource control RRC signaling; physical The layer new data indicates the NDI bit; the DMRS pilot scrambling code configuration information n scid solves the problem that the orthogonal DMRS port for MU-MIMO transmission is limited when the total number of MU-MIMO layers increases, and the channel estimation performance is not caused by high MUI interference.
  • this step adds more orthogonal DMRS ports based on the throttle overhead and supports SU-MIMO/MU-MIMO dynamic handover, effectively suppressing MUI interference and improving channel estimation. Performance, improved MU-MIMO system performance.
  • the transmitting end and the receiving end appoint N DMRS port groups, and the transmitting end uses the RRC signaling or physical layer NDI bit to indicate the DMRS port group allocation information, the RRC signaling or the physical layer NDI.
  • the different indication information values indicated by the bits correspond to different DMRS port groups, wherein the DMRS port groups in the DMRS port group are different in sequence corresponding to different port groups, and N is a positive integer greater than 1.
  • the transmitting end may indicate port allocation information in the DMRS port group by using port allocation signaling of the physical layer.
  • the transmitting end notifies the DMRS port allocation information and the M-1 other information by using M information joint coding, where M is a positive integer, and the M-1 other information includes at least one of the following : DMRS pilot scrambling code configuration information n scid information, layer number indication information at the receiving end;
  • N n scids correspond to N different DMRS port groups, where r is 1 or 2, and N is a positive integer greater than 1.
  • the sending end indicates, by using the indication information, that the allocation information of the DMRS port includes:
  • the sender notifies the receiving end whether the correspondence between the n scid and the DMRS port group is enabled, and further indicates the allocation information of the DMRS port, and the enabling indication information is notified by one or more of the following manners: Notification: NDI notification through the transport block; fixed enable, where N n scid values are bound to N DMRS port groups in joint encoding, N is a positive integer greater than 1.
  • the N n scid values correspond to the N DMRS port groups; when the corresponding relationship between the n scid and the DMRS port group is not enabled, the n scid There is no correspondence with the DMRS port group.
  • FIG. 2 is a flowchart of a method for notifying a mapping relationship according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:
  • Step S202 In a transmission mode, the sending end sends a notification message to the receiving end, and the receiving end selects a mapping relationship among the multiple mapping relationships according to the notification information, where the mapping relationship refers to the combined coding domain value set and joint coding.
  • the mapping relationship between the content sets, the sending method of the notification message includes at least one of the following ways:
  • the transport block modulation and one or more bits of the coding strategy MCS bit field are notified.
  • the sending end sends a notification message to the receiving end, and the receiving end selects a mapping relationship among the multiple mapping relationships according to the notification information, where the mapping relationship refers to the combined coding domain value set and the joint
  • the mapping relationship between the coded content sets solves the problem that when the total number of MU-MIMO layers increases, the orthogonal DMRS ports for MU-MIMO transmission are limited, and the high MUI interference causes the channel estimation performance to be low, thereby affecting the performance of the MU-MIMO system.
  • this step increases the number of orthogonal DMRS ports based on the throttle overhead, supports SU-MIMO/MU-MIMO dynamic handover, and improves the flexibility of base station configuration, effectively suppressing MUI interference during channel estimation, and improving The channel estimation performance improves the performance of the MU-MIMO system.
  • the indication that the mapping relationship bit occupies one or more least significant bit LSB bits of the bit field when the number of bits indicating the mapping relationship is less than the number of bits in the bit field, the indication that the mapping relationship bit occupies one or more least significant bit LSB bits of the bit field.
  • the NDI different value of the unenabled transport block indicates a different mapping relationship
  • the transport block is not enabled in the downlink DCI notification, indicating that the mapping relationship is different includes one of the following: fixedly selecting one mapping relationship; selecting any one of N mapping relationships; using the first enabled transport block
  • the NDI indicates a different mapping relationship; the NDI using the second enabled transport block indicates a different mapping relationship; the NDI joint using all enabled transport blocks indicates a different mapping relationship.
  • the joint coding of the joint coding domain includes one of the following:
  • the joint coding is a joint coding of a DMRS port of the receiving end, a physical downlink shared channel PDSCH layer of the receiving end, and a scrambling code n scid of the DMRS port of the receiving end;
  • the joint coding is a joint coding of the DMRS port of the receiving end, the number of PDSCH layers of the receiving end, the scrambling code n scid of the DMRS port of the receiving end, and the DMRS power of the receiving end.
  • the joint encoded content indicates the receiving.
  • a combination of a DMRS port value of the terminal, a PDSCH layer value of the receiving end, and a DMRS port scrambling code n scid value of the receiving end, all possible combinations of the three constitute a combined content of the combined coded content;
  • the joint coded content indicates the receiving A combination of the DMRS port value of the end, the PDSCH layer value of the receiving end, and the DMRS port scrambling code n scid value of the receiving end, all possible combinations of the four constitute a total set of the joint encoded content.
  • mapping relationship between the value set of the joint coding domain and the joint coded content set satisfies at least one of the following characteristics:
  • the number of bits of the joint coding domain corresponding to different mapping relationships is the same;
  • the same bit value of the joint coding domain corresponds to one transport block and two transport blocks are regarded as two different values, that is, the total number of joint coding values is 2 m+1 elements, which is ⁇ the value corresponding to one transport block is 0 ⁇ 2 m - 1, the value corresponding to two transport blocks is 0 ⁇ 2 m -1 ⁇ , where m represents the number of bits occupied by the joint coding domain;
  • the mapping relationship is a one-to-one mapping relationship.
  • the value set of the joint coding domain in a mapping relationship is a subset of the joint coded value set, and the coded content set in a mapping relationship is a child of the total content of the coded content. set;
  • the same value of the joint coding domain is either the same or different in the joint coding content represented in the different mapping relationship.
  • mapping relationships and the number of mapping relationships are known in advance by the receiving end and the transmitting end;
  • mapping relationship indication information The correspondence between the mapping relationship indication information and the mapping relationship is pre-agreed by the receiving end and the transmitting end.
  • FIG. 3 is a flowchart of a method for determining a DMRS port of a demodulation reference signal according to an embodiment of the present invention. The process includes the following steps:
  • Step S302 In a transmission mode, the receiving end receives the indication information sent by the sending end, and the receiving end determines, by using the indication information, the DMRS port used by the receiving end for the data demodulation, where the indication information includes at least one of the following: : radio resource control RRC signaling; physical layer new data indicates NDI bit; DMRS pilot scrambling code configuration information n scid .
  • the receiving end receives the indication information sent by the sending end, and the receiving end determines, by using the indication information, the DMRS port used by the receiving end for the data demodulation of the current subframe, and the indication information includes at least the following 1: Radio resource control RRC signaling; physical layer new data indicates NDI bit; DMRS pilot scrambling code configuration information n scid , which solves orthogonal DMRS port for MU-MIMO transmission when MU-MIMO total layer number increases Limited, high MUI interference leads to low channel estimation performance and thus affects the performance of MU-MIMO system.
  • Radio resource control RRC signaling Radio resource control RRC signaling
  • physical layer new data indicates NDI bit
  • DMRS pilot scrambling code configuration information n scid which solves orthogonal DMRS port for MU-MIMO transmission when MU-MIMO total layer number increases Limited, high MUI interference leads to low channel estimation performance and thus affects the performance of MU-MIMO system.
  • This step adds more orthogonal DMRS ports based on the throttle overhead and supports SU-MIMO/MU-MIMO dynamic switching.
  • the MUI interference when the channel estimation value is effectively suppressed is improved, the channel estimation performance is improved, and the performance of the MU-MIMO system is improved.
  • the transmitting end and the receiving end appoint N DMRS port groups, N>1 and N are positive integers, and the receiving end obtains the DMRS port group of the receiving end by one or more of the following information:
  • the receiving end acquires DMRS port group information through RRC signaling
  • the receiving end determines DMRS port group information according to n scid ;
  • the receiving end acquires DMRS port group information through NDI signaling
  • the receiving end determines the DMRS port group information according to whether the n scid and the n scid are combined with the DMRS port group mapping enable information;
  • the receiving end After obtaining the DMRS port group information, the receiving end further determines, in combination with the intra-group DMRS port configuration information of the physical layer signaling, the DMRS port used by the current subframe for data demodulation.
  • FIG. 4 is a flowchart of a method for determining a mapping relationship according to an embodiment of the present invention. As shown in FIG. 4, the process includes the following steps:
  • Step S402 In a transmission mode, the receiving end receives the notification message sent by the sending end, and the receiving end selects a mapping relationship among the multiple mapping relationships according to the notification information, where the mapping relationship refers to the numerical set and joint coding of the joint coding domain.
  • the mapping relationship between the content sets is based on the value of the joint coding domain, and the joint coding content is obtained by referring to the selected mapping relationship, and the notification information includes at least one of the following information:
  • the new data of the transport block indicates the NDI; the redundant version of the transport block;
  • One or more bit notifications in the MCS bit field of the transport block are One or more bit notifications in the MCS bit field of the transport block.
  • the receiving end receives the notification message sent by the sending end, and the receiving end selects a mapping relationship among the multiple mapping relationships according to the notification information, where the mapping relationship refers to the numerical set and the joint of the joint coding domain.
  • the mapping relationship between the coded content sets solves the problem that when the total number of MU-MIMO layers increases, the orthogonal DMRS ports for MU-MIMO transmission are limited, and the high MUI interference causes the channel estimation performance to be low, thereby affecting the performance of the MU-MIMO system.
  • this step increases the number of orthogonal DMRS ports based on the body overhead, supports SU-MIMO/MU-MIMO dynamic switching, improves the flexibility of base station configuration, effectively suppresses MUI interference, and improves channel estimation performance. Improves MU-MIMO system performance.
  • the indication that the mapping relationship bit occupies one or more least significant bit LSB bits of the bit field when the number of bits indicating the mapping relationship is less than the number of bits in the bit field, the indication that the mapping relationship bit occupies one or more least significant bit LSB bits of the bit field.
  • the joint coding of the joint coding domain includes one of the following:
  • the joint coding is a joint coding of a DMRS port of the receiving end, a physical downlink shared channel PDSCH layer of the receiving end, and a scrambling code n scid of the DMRS port of the receiving end;
  • the joint coding is a joint coding of the DMRS port of the receiving end, the number of PDSCH layers of the receiving end, the scrambling code n scid of the DMRS port of the receiving end, and the DMRS power of the receiving end.
  • the joint encoded content indicates the receiving.
  • a combination of a DMRS port value of the terminal, a PDSCH layer value of the receiving end, and a DMRS port scrambling code n scid value of the receiving end, all possible combinations of the three constitute a combined content of the combined coded content;
  • the joint coded content indicates the receiving A combination of the DMRS port value of the end, the PDSCH layer value of the receiving end, and the DMRS port scrambling code n scid value of the receiving end, all possible combinations of the four constitute a total set of the joint encoded content.
  • mapping relationship between the value set of the joint coding domain and the joint coded content set satisfies at least one of the following characteristics:
  • the number of bits of the joint coding domain corresponding to different mapping relationships is the same;
  • the same bit value of the joint coding domain corresponds to one transport block and two transport blocks as two different values
  • the mapping relationship is a one-to-one mapping relationship.
  • the value set of the joint coding domain in a mapping relationship is a subset of the joint coded value set, and the coded content set in a mapping relationship is a child of the total content of the coded content. set;
  • the joint coded content of the same coded value in the joint coding domain is the same or different in the different mapping relationship, that is, the total number of joint coded values has 2 m+1 elements, which is ⁇ the value corresponding to a transport block 0 ⁇ 2 m -1
  • the values corresponding to the two transport blocks are 0 to 2 m -1 ⁇ , where m represents the number of bits occupied by the joint coding domain.
  • mapping relationships and the number of mapping relationships are known in advance by the receiving end and the transmitting end;
  • mapping relationship indication information The correspondence between the mapping relationship indication information and the mapping relationship is pre-agreed by the receiving end and the transmitting end.
  • the device corresponding to the above method is also provided in the embodiment, and the device is used to implement the above-mentioned embodiments and preferred embodiments, and the detailed description thereof has been omitted.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 5 is a structural block diagram of a notification device for demodulating a reference signal DMRS port according to an embodiment of the present invention. As shown in FIG. 5, the device is located at a transmitting end, and the device includes:
  • the first sending module 52 is configured to: in a transmission mode, the sending end sends the prompting information to the receiving end, where the sending end indicates the allocation information of the DMRS port by using the indication information, the indication information includes at least one of the following: radio resource control RRC Signaling; physical layer new data indicates NDI bit; DMRS pilot scrambling code configuration information n scid .
  • FIG. 6 is a structural block diagram of a notification device for mapping relationship according to an embodiment of the present invention. As shown in FIG. 6, the device is located at a sending end, and the device includes:
  • the second sending module 62 is configured to send, in a transmission mode, a notification message to the receiving end, where the receiving end And selecting, according to the notification information, a mapping relationship, where the mapping relationship refers to a mapping relationship between the combined coding domain value set and the joint coding content set, where the notification message sending method includes at least one of the following manners.
  • the transport block modulation and one or more bits of the coding strategy MCS bit field are notified.
  • FIG. 7 is a structural block diagram of a determining apparatus for demodulating a reference signal DMRS port according to an embodiment of the present invention. As shown in FIG. 7, the apparatus is located at a receiving end, and the apparatus includes:
  • the first receiving module 72 is configured to: in a transmission mode, the receiving end receives the indication information sent by the sending end, and the receiving end determines, by the indication information, the DMRS port used by the receiving end for the data demodulation of the current subframe, the indication information At least one of the following includes: radio resource control RRC signaling; physical layer new data indicating NDI bit; DMRS pilot scrambling code configuration information n scid .
  • FIG. 8 is a structural block diagram of a device for determining a mapping relationship according to an embodiment of the present invention. As shown in FIG. 8, the device is located at a receiving end, and includes:
  • the second receiving module 82 is configured to: in a transmission mode, the receiving end receives the notification message sent by the sending end, and the receiving end selects a mapping relationship among the multiple mapping relationships according to the notification information, where the mapping relationship refers to the joint coding domain.
  • the mapping relationship between the value set and the joint coded content set is based on the value of the joint coding domain, and the joint coding content is obtained by referring to the selected mapping relationship, and the notification information includes at least one of the following information:
  • the new data of the transport block indicates the NDI; the redundant version of the transport block;
  • One or more bit notifications in the MCS bit field of the transport block are One or more bit notifications in the MCS bit field of the transport block.
  • the initialization value of the DMRS random sequence is obtained based on the following formula:
  • n s is the subframe number, Or f(n scid ) ⁇ 0,1,2,3 ⁇ , where n scid ⁇ 0,1,2,3 ⁇ represents the scrambling code ID, where It is the virtual cell ID used by the terminal for DMRS demodulation, and g(n SCID ) is the correction value of n SCID .
  • the candidate values are notified by higher layer signaling, and the high layer signaling configures different candidate values for different codeword numbers.
  • the f(n SCID ) used to calculate c init is corrected to one of the following ways:
  • the g(n SCID ) used to calculate c init is corrected to one of the following modes:
  • g(n SCID ) xor(g(n SCID ),1);
  • NDI values of the unenabled codeword indicate the different DMRS port groups, and the number of DMRS port groups is equal to the number of different NDI values;
  • different n_scid values in the DCI indicate the different DMRS port groups, and the number of DMRS port groups is equal to the number of different n_scid values;
  • the mapping relationship is as shown in Table 1.
  • the joint coding value 7 corresponding to one transport block does not correspond to the coded content. As a reservation, it does not belong to the joint coded value set in the mapping relationship, that is, the mapping relationship corresponds to a joint.
  • the coded value set consists of a total of 13 values consisting of ⁇ a value of 0 to 6 corresponding to one transport block and 0 to 7 corresponding to two transport blocks ⁇ .
  • the joint coded content set in the mapping relationship is represented by the joint coded value set shown in Table 1. Each of the values corresponds to the joint coded content, for a total of 13 elements.
  • the mapping relationship is shown in Table 2.
  • the receiving end selects among 2 n mapping relationships according to n-bit high-level signaling. Specifically, in the preferred embodiment, if the receiving end receives the high-level signaling 1 bit value of 0, select the mapping relationship one, that is, Table 1, and then refer to Table 1, according to the received joint coding domain value, to obtain the joint coding content; The receiving end receives the high-level signaling 1 bit value of 1, selects the mapping relationship 2, that is, Table 2, and then refers to Table 2, according to the received joint coding domain value, to obtain the joint coding content.
  • the joint coding is a joint coding of the number of layers of the receiving end, the DMRS port and the scrambling code ID nSCID corresponding to the DMRS port.
  • nSCID 0.
  • different mappings are assigned to different receiving ends through higher layer signaling, so that DM-ports of MU-MIMO of more receiving ends are orthogonal.
  • each receiving end transmits one layer, the receiving end 1 to 2 allocates table 1, the receiving end 3 to 4 allocates table 2, and the receiving ends 1 to 4 sequentially allocates 7 ports (ie, one in Table 1) 0 value when transferring a block), 8 ports (that is, 2 values when one transport block in Table 1), 11 ports (that is, 0 value when one transport block in Table 2), 13 ports (that is, one transport block in Table 2) When the value is 2, so that the DMRS port of the 4 receiving ends is orthogonal.
  • each receiving end is 1 layer
  • the receiving end 1 to 4 is assigned Table 1
  • the receiving end 5 to 8 is assigned Table 2
  • the receiving end 1 to 2 is assigned Table 1
  • the receiving end 3 to 4 is assigned Table 2
  • the receiving end 1 to 2 are sequentially assigned 0 to 2 corresponding to the 2 transport blocks in Table 1. 1 value; the receiving end 3 to 4 are sequentially assigned 0 to 1 values corresponding to the 2 transport blocks in Table 2, so that 4-layer orthogonal 4-layer pseudo-orthogonal MU-MIMO transmission can be achieved.
  • one layer or two layers per receiving end a total of eight layers of MU-MIMO
  • 8 DMRS ports have 2 pseudo-orthogonal groups, and each pseudo-orthogonal group has 4 orthogonal DMRS ports.
  • any of the DMRS ports ⁇ 7, 8, 11, 13 ⁇ is equivalent; if it is a layer 2 ⁇ 7, 8 ⁇ port and ⁇ 11, 13 ⁇
  • the port is equivalent; corresponding to more than 2 layers, the items in the two tables are the same, so that the high-level indication parameter update period can be relatively long, and can also adapt to the dynamic switching of SU-MIMO/MU-MIMO transmission.
  • Tables 1 and 2 are the case where the joint coding domain is 3 bits, and the preferred embodiment does not limit other joint coded value sets and joint coded content sets.
  • the transmitting end instructs the receiving end to select among 2 n mapping relationships by using high-level n-bit signaling.
  • n 1
  • the mapping relationship is as shown in Table 3
  • the mapping relationship is as shown in Table 4.
  • the receiving end selects among 2 n mapping relationships according to n-bit high-level signaling. Specifically, in the preferred embodiment, if the receiving end receives the high-level signaling 1 bit value of 0, select the mapping relationship one, that is, Table 3, and then refer to Table 3, according to the received joint coding domain value, to obtain the joint coding content; The receiving end receives the high-level signaling 1 bit value of 1, selects the mapping relationship 2, that is, Table 4, and then refers to Table 4, according to the received joint coding domain value, to obtain the joint coding content.
  • the joint coding is the number of layers of the receiving end, the scrambling code ID nSCID corresponding to the DMRS port and the DMRS port, and the joint encoding of the DMRS power of the receiving end.
  • P represents the power difference between the DMRS and the PDSCH at the receiving end.
  • the receiving end of the item that does not indicate the nSCID in Table 3 and Table 4 determines the power difference between the DMRS and the PDSCH according to the number of layers, that is, the number of layers is less than or equal to 2, the power difference between the DMRS and the PDSCH is 0 dB, and the number of layers is greater than 2.
  • the power difference between the DMRS and the PDSCH is 3 dB.
  • the item labeled nSCID derives the power difference between the DMRS and the PDSCH based on the P value. Where ⁇ A, B, C, D, A1, B1, C1, D1 ⁇ are fixed values.
  • Table 4 can be allocated to the receiving end with poor channel quality or relatively few antennas at the receiving end; Table 3 is allocated to the receiving end with good channel quality or a large number of receiving antennas.
  • more pseudo-orthogonal groups can be realized, that is, up to 4 groups of pseudo-orthogonal groups, and 4 orthogonal DMRS ports ⁇ 7, 8, 11, 13 ⁇ in each group of pseudo-orthogonal groups. That is, up to 16 DMRS pseudo-orthogonal DMRS ports are implemented for MU-MIMO transmission.
  • the DMRS pilot power is adjusted in Tables 3 and 4 to improve the pilot power when the total number of layers of the MU-MIMO transmission increases, thereby improving the channel estimation performance.
  • Table 4 when using Table 4, the value of 5 ⁇ 6 of one transport block in the existing 212 protocol is canceled only for the restriction of the first pass.
  • the receiving end 1 to 2 is assigned a table 3
  • the receiving end 7 to 8 is assigned a table 4
  • the receiving end 1 to 2 are sequentially assigned 0 to 1 values of the corresponding two transport blocks in the table 3
  • the receiving end is 3 to 8
  • the ⁇ 0, 1, 4 to 7 ⁇ values of the corresponding two transport blocks in Table 4 are sequentially allocated.
  • mapping relationship is as shown in Table 5:
  • Table 5 can support the increase in the number of layers transmitted by the user, so that the update period of the higher layer signaling can be relatively lengthened.
  • the transmitting end uses the NDI of the transport block in the DCI command to indicate that the receiving end selects in different mapping relationships:
  • the receiving end selects a mapping relationship table according to the NDI value of the unenabled transport block, where the NDI value is 0.
  • the receiving end selects Table 6; the NDI value is 1 and the receiving end selects Table 7. If the receiving end receives two transport blocks in the DCI, the receiving end selects the mapping relationship one, that is, Table 6.
  • the receiving end refers to the selection mapping relationship table, and obtains the joint coding content by referring to the selected mapping relationship table according to the joint coding domain value obtained in the DCI command.
  • mapping table 7 of the preferred embodiment is shown in Table 8:
  • the NDI indication receiving end of the transport block is selected between Table 6 and Table 7, and supports more orthogonal DMRS while supporting SU-MIMO/MU-MIMO dynamic switching to the greatest extent.
  • the port is used for MU-MIMO transmission.
  • the receiving ends 1 to 4 are sequentially assigned 0 to 3 values corresponding to one transport block in Table 6, and the receiving ends 5 to 8 are sequentially assigned 0 to 3 values corresponding to one transport block in Table 7.
  • the DMRS port that reaches MU-MIMO has 2 pseudo-orthogonal groups, and each group has 4 orthogonal DMRS ports.
  • the receiving end 1 is assigned a value of 4 corresponding to one transport block in Table 6, and the receiving ends 2 to 4 are sequentially assigned 4 to 6 values corresponding to one transport block in Table 7.
  • each receiving end has 2 layers, and also reaches MU.
  • the MIMO DMRS port has 2 pseudo-orthogonal groups with 4 orthogonal DMRS ports in each group.
  • the number of layers transmitted by each receiving end is less than or equal to 2, corresponding to one transport block.
  • the number of transmission layers of each receiving end is not limited, that is, it may be 1 to 8 layers. It can correspond to 2 transport blocks. When it is 2 transport blocks, the receiver selects Table 6 by default.
  • the transmitting end instructs the receiving end whether the mapping relationship between the scrambling code n scid value of the DMRS port in the joint coding and the port group is enabled.
  • the DMRS port indicated in the DCI joint coding is the DMRS port used for data demodulation in the current subframe of the receiving end, and n scid has no correspondence with the DMRS port group;
  • the receiving end When enabled, the receiving end first obtains the port group according to the n scid in the DCI joint coding. If the port group is one, the DMRS port indicated in the DCI joint coding is the DMRS port used for data demodulation in the current subframe of the receiving end. If the port group is two, the DMRS port indicated in the DCI joint coding is replaced with the port in port group 2 as the DMRS port for which the current subframe data is demodulated.
  • port group one is DMRS port ⁇ 7, 8 ⁇
  • port group two is DMRS port ⁇ 11, 13 ⁇ .
  • port 7 corresponds to port 11
  • port 8 and port 13 correspond.
  • the reference mapping relationship of the joint coding domain set and the joint coding content is as shown in Table 9:
  • one embodiment of the preferred embodiment of the present embodiment is notified by higher layer signaling, in particular a high layer signaling bit indicating the n scid _Point_DMRSPortType n scid scrambling code value indicating whether the port type enabled. Indicates that it is not enabled. The representation is enabled.
  • the reference mapping relationship between the joint coding domain set and the joint coding content is as shown in Table 9.
  • the fixed scrambling code n scid value indicates that the port type is enabled
  • the fixed scrambling code n scid value indicates that the port type is not enabled, or whether the NDI indication of the first transport block is enabled, or The NDI indication using the second transport block is enabled.
  • the reference mapping relationship of the joint coding domain set and the joint coding content is either as shown in Table 9, or as shown in Table 10.
  • the third embodiment of the preferred embodiment indicates that the scrambling code n scid value indicates whether the port type is enabled by one LSB bit of the RV bit field of the first enabled transport block.
  • the fourth implementation manner of the preferred embodiment is to indicate whether the port type is enabled by using the 1 LSB bit of the MCS bit field of the first enabled transport block to indicate the scrambling code n scid value.
  • the fifth implementation manner of the preferred embodiment is to indicate whether the port type is enabled by the scrambling code n scid value by using one LSB bit of the process number bit field.
  • the receiving end refers to the reference mapping relationship table (such as Table 9, or Table 10) according to the value of the joint coding domain, and the DMRS port obtained by the receiving end is the receiving end.
  • the current subframe is used for the DMRS port of the data demodulation reference signal, for example, the joint coding domain value of the receiving end corresponds to the value 1 of one transport block, and the DMRS port of the current subframe used for data demodulation is port 7;
  • the joint coding domain value of the receiving end corresponds to the value 3 of one transport block, and the DMRS port of the current subframe used for data demodulation is port 8;
  • the joint coding domain value of the receiving end corresponds to the value 1 of two transport blocks, and its current
  • the DMRS ports used for data demodulation in subframes are ports 7-8.
  • the receiving end When the correspondence between the n scid and the port group is enabled, the receiving end first obtains the port group according to the n scid in the joint coding domain, and refers to the DMRS port obtained by referring to the reference mapping relationship table (such as Table 9, or Table 10). If the port group is one, the DMRS port is the DMRS port used for data demodulation in the current subframe of the receiving end. If the port group is two, the DMRS port indicated in the DCI joint coding is replaced with the port in the port group 2. , as the DMRS port for demodulation of its current subframe data. 7 of the port group 1 corresponds to 11 of the port group 2, and 8 of the port group 1 and 13 of the port group 2 correspond to each other.
  • the reference mapping relationship table such as Table 9, or Table 10
  • the joint coding domain value of the receiving end corresponds to the value 1 of one transport block, and the DMRS port of the current subframe used for data demodulation is port 11; the joint coding domain value of the receiving end corresponds to the value of one transport block 3
  • the DMRS port whose current subframe is used for data demodulation is port 13; the joint coding domain value of the receiving end corresponds to the value 1 of two transport blocks, and the DMRS port of the current subframe used for data demodulation is port 11 ⁇ 13.
  • the DMRS random sequence is a Gold random sequence defined by a 31-bit binary initialization value.
  • the OCC orthogonal code is multiplied as the final DMRS demodulation reference signal.
  • the sending end notifies the receiving end to select among multiple mapping relationships.
  • the different indication information corresponds to different mapping relationships, and the indication information includes at least one of the following information:
  • the new data of the transport block indicates the NDI
  • Hybrid automatic retransmission of one or more bits in the HARQ (Hybrid Automatic Repeat Req Receiver) process number bit field
  • One or more bits in the block MCS bit field are transmitted.
  • the indication mapping relationship bit occupies one or more LSB (Least Significant Bit) bits of the bit field.
  • the sending end notifies the receiving end to select among the four mapping relationships, and the correspondence between the indication information and the mapping relationship is as shown in Table 11:
  • One embodiment of the 2-bit indication information of the preferred embodiment is by high level information notification.
  • a second implementation of the 2-bit indication information of the preferred embodiment is an NDI indication by a transport block, wherein the left bit of the 2-bit indication bit is composed of the NDI of the first enabled transport block, and the 2-bit indication bit to the right
  • the 1 bit consists of the NDI of another transport block other than the first enabled transport block.
  • a third embodiment of the 2-bit indication information of the preferred embodiment is an RV indication by a transport block, wherein the 1 bit to the left of the 2-bit indication bit is composed of 1 LSB bit of the RV bit field of the first enabled transport block. Wherein the 1 bit to the right of the above 2-bit indication bit is composed of 1 LSB bit of the RV bit field of another transport block other than the first enabled transport block.
  • a fourth implementation of the 2-bit indication information of the preferred embodiment is by an RV indication of a transport block, wherein the 2-bit indication consists of 2 LSB bits of the RV bit field of the first enabled transport block.
  • a fifth embodiment of the 2-bit indication information of the preferred embodiment is an MCS indication by a transport block, wherein 1 bit to the left of the 2-bit indication bit is composed of 1 LSB bit of the MCS bit field of the first enabled transport block.
  • the 1 bit to the right of the above 2-bit indication bit is composed of 1 LSB bit of the MCS bit field of another transport block other than the first enabled transport block.
  • a sixth implementation of the 2-bit indication information of the preferred embodiment is by an MCS indication of a transport block consisting of 2 LSB bits of the MCS bit field of the first enabled transport block.
  • the seventh embodiment of the 2-bit indication information of the preferred embodiment is composed of 2 LSB bits of the process number indication field.
  • An eighth embodiment of the 2-bit indication information of the preferred embodiment is a joint indication by a transport block NDI and RV, wherein the 1 bit of the left bit of the 2-bit indication bit is 1 LSB of the RV bit field of the first enabled transport block
  • the bit composition, wherein the 1 bit to the right of the above 2-bit indication bit is composed of the NDI of another transport block other than the first enabled transport block.
  • nSCID 0.
  • Table 12 to Table 15 for the case of one codeword, the transmission of 1 to 4 layers is reserved, and in the case of two codewords, 2 to 8 layers are reserved.
  • the port allocation is to solve the conflicting problem of the two contents required to indicate the bit of the mapping relationship, and the two contents represent the original indication content of the information bit (such as RV, MCS, NDI, process number). , a mapping relationship indicating an indication.
  • the MCS value of the first enabled transport block is 19
  • the value of the 2 LSB bit fields is 11, but this is the SU-MIMO layer 8 transmission, if not in Table 15. 8-layer SU-MIMO scheduling.
  • the two LSBs of the MCS bit field indicate that the bit field needs to be modified to other values, or other layer allocations in Table 15 are used at this time, thereby reducing system performance and limiting the scheduling of the base station.
  • the transmitting end instructs the receiving end to select among different mapping relationships by using the NDI of the transport block in the DCI command.
  • the NDI that does not enable the transport block indicates different mapping relationship selection; when no transport block is not enabled, the receiver transmits two transport blocks, and the sender indicates that the receiver passes the following manner.
  • mapping relationships are selected according to the NDI of the second enabled transport block.
  • the receiving end if the receiving end receives only one transport block enable in the DCI, and one transport block is not enabled, the receiving end selects a mapping relationship table according to the NDI value of the unenabled transport block; if the receiving end is in DCI The two transmission blocks are both enabled, and the receiving end selects different mapping relationships according to the NDI of the first enabling block, or selects different mapping relationships according to the NDI of the second enabling block, where the NDI value is 0, and the receiving End selection table 16; NDI value 1 Receiver selection table 17. Then, the receiving end refers to the selected mapping relationship table according to the joint coding domain value obtained in the DCI command to obtain the joint coding content.
  • nSCID 0 in the items not marked in Table 16 and Table 17.
  • the transmitting end and the receiving end stipulate N port groups, and the transmitting end indicates, by using at least one of the following indication information, the port group that the current end frame of the receiving end should select:
  • the receiving end further determines, according to the DMRS port group information, and the DMRS port configuration information of the physical layer signaling, the DMRS port used by the current subframe for data demodulation.
  • N 2
  • port group one is DMRS port ⁇ 7, 8 ⁇
  • port group two is DMRS port ⁇ 11, 13 ⁇
  • the receiving end obtains the port group indication information according to the RRC high layer signaling, and the correspondence between the high layer signaling value and the port group is as shown in Table 19:
  • the receiving end obtains the indication information of the port group according to the NDI, specifically:
  • the NDI of the unenabled codeword indicates a different port group
  • the NDI of the first enabled codeword indicates a different port group
  • the DMRS port indicated in Table 19 is the DMRS port used for data demodulation in the current subframe of the receiving end.
  • the receiving end obtains the DMRS port group of the current subframe as ⁇ 11, 13 ⁇ , it is divided into the following two cases:
  • Case 1 Corresponding to the item whose number of layers indicated in Table 18 is less than or equal to 2, the DMRS port indicated in Table 18 is to be replaced, that is, the port in port group 1 is indicated in Table 18, corresponding to the port in port group 2.
  • the port in the port 2 is used as the DMRS port of the current subframe of the receiving end for data demodulation, specifically, the port 7 corresponds to the port 11, and the port 8 corresponds to the port 13;
  • Case 2 Corresponding to the item whose number of layers indicated in Table 20 is greater than 2, the DMRS port indicated in Table 18 is the DMRS port of the current sub-frame data demodulation of the receiving end.
  • the transmitting end and the receiving end stipulate N port groups, and the transmitting end indicates, by using at least one of the following indication information, the port group that the current end frame of the receiving end should select:
  • the receiving end further determines, according to the DMRS port group information, in combination with the intra-group DMRS port index configuration information of the physical layer signaling, the DMRS port used by the current subframe for data demodulation.
  • N 2
  • port group one is DMRS port ⁇ 7, 8, 9, 10, 11, 12, 13, 14 ⁇
  • port group two is DMRS port ⁇ 11, 13, 9, 10, 7,12,8,14 ⁇
  • the joint coding table of the port index, layer number, and scrambling code in the group is shown in Table 21.
  • the receiving end obtains the port group indication information according to the RRC high layer signaling, and the correspondence between the high layer signaling value and the port group is as shown in Table 22:
  • the receiving end obtains the port group according to the NDI. Instructions, specifically:
  • the NDI of the unenabled codeword indicates a different port group
  • the NDI of the first enabled codeword indicates a different port group
  • the receiving end combines the port group index information in the port group and the DCI command to obtain the DMRS port information used for demodulation in the current subframe.
  • the receiving port obtains the port group as A
  • the port index in the DCI command is k
  • the receiving end is currently
  • the DMRS port used for demodulation of the subframe is A(k).
  • the receiving end obtains the port group as ⁇ 11, 13, 9, 10, 7, 12, 8, 14 ⁇ , and obtains the scrambling code in the DCI command.
  • the value of the intra-port index, the number-of-layer joint coding field is the value 3 of the two codewords, that is, the 4th layer, and the port index is 1 to 4.
  • the DMRS port used for demodulation in the current subframe of the receiving end is ⁇ 11. , 13, 9, 10 ⁇ .
  • the base station uses the M information joint coding method to notify the DMRS port allocation information and the M-1 other information, and the M-1 other information includes at least the DMRS pilot scrambling code configuration information n scid information.
  • the n scid is bound to the port group, for example, the joint coding result is shown in Table 24:
  • the DMRS random sequence is a Gold random sequence defined by a 31-bit binary initialization value.
  • the OCC orthogonal code is multiplied as the final DMRS demodulation reference signal.
  • the base station uses the M information combination coding method to notify the DMRS port allocation information and the M-1 other information, wherein the M-1 other information includes at least the DMRS pilot scrambling code configuration information, n scid information and the layer number indication information of the receiving end.
  • the base station and the receiving end agree that N n scids correspond to N different DMRS port groups, N n
  • the scid value is bound to the N DMRS port groups when jointly encoding.
  • the candidate value is set, and the upper layer configures different candidate values for different codeword numbers. As shown in the following table:
  • high-level configuration The candidate value, but the high-level configuration process does not know the specific number of code words in the actual transmission, and finds the virtual cell and the candidate value according to the actual number of code words in the transmission process.
  • the base station notifies the DMRS port allocation information and the M-1 other information by using M information joint coding, wherein the M-1 other information includes at least the DMRS pilot scrambling code configuration information.
  • the n scid is bound to the port group, for example, the joint coding result is shown in Table 26:
  • the NDI of the unenabled codeword indicates a different port group
  • mapping relationship between NDI and port group is as shown in Table 27:
  • mapping relationship between the nSCID and the port group is as shown in Table 28:
  • n s is the subframe number, among them It is the virtual cell ID used by the terminal for DMRS demodulation.
  • the g(n SCID ) of c init is corrected to:
  • the DMRS random sequence is a Gold random sequence defined by a 31-bit binary initialization value.
  • the OCC orthogonal code is multiplied as the final DMRS demodulation reference signal.
  • the number of codewords is two, and the port group can be dynamically indicated by the n scid in the DCI, so that the DMRS orthogonality of the terminal 1 and the terminal 2 is achieved.
  • a certain transmission process is a dual codeword transmission, and the mapping relationship between the virtual cell and the candidate value is determined according to the mapping relationship of the high code configuration to find the dual codeword.
  • the orthogonal DMRS port for MU-MIMO transmission is added without increasing the number of bits occupied by the layer number, the port, and the scrambling code combination coding domain, thereby realizing that the TM mode is not increased. Added for MU-MIMO orthogonal DMRS ports.
  • the number of bits occupied by the method, the port, and the scrambling code combination coding domain of the preferred embodiment of the present invention may remain unchanged, thereby saving DCI overhead, or combining bits occupied by the coding domain.
  • the number increases, and with the preferred embodiment described above, the number of orthogonal DMRS ports for MU-MIMO transmission can also be greatly increased.
  • more orthogonalization of the DMRS port of the MU-MIMO receiving end is implemented without increasing the DCI2C and the number of DCI2D bits, thereby supporting the high transmission mode without increasing the transmission mode.
  • Order MU-MIMO transmission improves system performance while reducing terminal complexity.
  • the orthogonalization indication at this time is dynamic, and the dynamic switching of MU-MIMO/SU-MIMO can be supported to the greatest extent.
  • the method of the preferred embodiment of the present invention can also be used for a new DCI mode.
  • the method of the preferred embodiment of the present invention can also support the high-order MU while reducing the number of bits in the newly added DCI mode. MIMO transmission.
  • the solution of the two content conflicts indicated by the information bits is fully considered, and the two contents represent the original indication content of the existing information bits (such as RV). , MCS, NDI, process number), a mapping relationship indicating the indication of existing information bits.
  • the method according to the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases It is a better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method of various embodiments of the present invention.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.
  • Embodiments of the present invention also provide a storage medium.
  • the storage medium may be configured to store program code for performing the method steps of the above embodiment:
  • the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • a mobile hard disk e.g., a hard disk
  • magnetic memory e.g., a hard disk
  • the processor performs the method steps of the foregoing embodiments according to the stored program code in the storage medium.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the transmitting end sends the indication information to the receiving end, and the sending end passes the indication.
  • the information indicates allocation information of the DMRS port or the mapping relationship, and the indication information includes at least one of the following: radio resource control RRC signaling; physical layer new data indicating NDI bit; DMRS pilot scrambling code configuration information n scid , which is solved when MU- After the total number of MIMO transmissions is increased, and the orthogonal DMRS ports for MU-MIMO transmission are limited, and the high MUI results in a problem that the channel estimation performance is not high to affect the performance of the MU-MIMO system, the present invention saves signaling overhead.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et de détermination de ports DMRS ou d'une relation de mappage. Le procédé comprend les étapes suivantes : une extrémité d'envoi envoie un message d'indication à une extrémité de réception dans un mode de transmission, et l'extrémité d'envoi indique des informations d'attribution concernant des ports DMRS ou une relation de mappage au moyen du message d'indication, le message d'indication contenant : une signalisation de gestion des ressources radioélectriques (RRC) et/ou un bit d'indication de nouvelles données de couche physique (NDI) et/ou des informations de configuration d'embrouilleur pilote de DMRS (nscid), qui sont utilisées pour résoudre le problème de l'incidence provoquée, sur la performance d'un système MU-MIMO, par une performance d'estimation de canal inférieure due au fait que des ports DMRS orthogonaux sont limités pour une transmission MU-MIMO et qu'une interférence MUI est élevée après qu'un nombre total de couches de transmission MU-MIMO a été incrémenté. L'invention permet ainsi d'augmenter des ports DMRS orthogonaux pour une transmission MU-MIMO en améliorant la flexibilité de configuration d'une station de base durant une transmission MU-MIMO, en inhibant efficacement l'interférence MUI durant une estimation de canal, et en améliorant une performance d'estimation de canal.
PCT/CN2016/092691 2015-08-14 2016-08-01 Procédé et dispositif de notification et de détermination de ports dmrs ou d'une relation de mappage WO2017028673A1 (fr)

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