Systems and methods for reference signaling for wireless communication

Abstract

A system and method for wireless communication are presented. In one aspect, a wireless communication device determines a first demodulation reference signal (DMRS) table. In one aspect, the wireless communication device receives a value of a field in signaling from a wireless communication node. In one aspect, the wireless communication device determines a first DMRS parameter according to the first DMRS table and the value of the field. In some embodiments, the first DMRS table includes a mapping between a value of the field of the signaling and a value of the first DMRS parameter. In some embodiments, the first DMRS table includes a first DMRS parameter having a value associated with a plurality of categories of DMRS ports. In some embodiments, each category of the plurality of categories of DMRS ports corresponds to a respective one of a plurality of second parameters.

Description

[Technical Field]

[0001] Technical field This disclosure generally relates to wireless communications, including, but not limited to, systems and methods for providing demodulated reference signal (DMRS) ports for wireless communications and for supporting a larger number of demodulated reference signal (DMRS) ports. [Background technology]

[0002] background The Third Generation Partnership Project (3GPP®), a standards organization, is currently developing a new radio interface called 5G New Radio (5G NR) and a next-generation packet core network (NG-CN or NGC). 5G NR has three main components: the 5G access network (5G-AN), the 5G core network (5GC), and the user equipment (UE). To facilitate the activation of different data services and requirements, the elements of the 5GC, also called network functions, have been simplified, and some of them are software-based and some are hardware-based, allowing them to be adapted as needed. [Overview of the Initiative] [Means for solving the problem]

[0003] overview The exemplary embodiments disclosed herein are intended to solve problems relating to one or more problems presented in the prior art and to provide additional features which will become readily apparent by referring to the following detailed description in conjunction with the accompanying drawings. Various embodiments describe exemplary systems, methods, devices, and computer program products. However, these embodiments are presented as examples and are not limiting, and it will be apparent to those skilled in the art who have read this disclosure that various modifications to the disclosed embodiments can be made while remaining within the scope of this disclosure.

[0004] At least one embodiment relates to a system, method, apparatus, or computer-readable medium for wireless communication between a wireless communication node and a wireless communication device. In some embodiments, the wireless communication node is a base station or transmit / receive point (TRP). In some embodiments, the wireless communication device is a user device (UE).

[0005] In some embodiments, the wireless communication device determines a first demodulated reference signal (DMRS) table. In some embodiments, the wireless communication device receives field values ​​in the signaling from the wireless communication node. In some embodiments, the wireless communication device determines first DMRS parameters according to the first DMRS table and field values. In some embodiments, The first DMRS table includes a mapping between the values ​​of the signaling fields and the values ​​of the first DMRS parameters. In some embodiments, the first DMRS table includes first DMRS parameters for multiple categories of DMRS ports, where each category of the multiple categories of DMRS ports corresponds to its respective second parameter.

[0006] In some embodiments, a first category of a plurality of categories of DMRS ports corresponds to an FD-OCC of length 2. In some embodiments, if the first DMRS table is for DMRS type I, the first DMRS table includes a first value in a field having the number of CDM groups where Y DMRS ports are DMRS ports {0,1,4,5} and the data is not 1, and a second value in a field having the number of CDM groups where Y DMRS ports are DMRS ports {0,1,4,5} and the data is not 2.

[0007] In some embodiments, a second category of the multiple categories of DMRS ports corresponds to FD-OCCs with lengths greater than 2.

[0008] In some embodiments, the length of the FD-OCC is one of 3, 4, or 6, or the length of the FD-OCC is one of 3 or 6.

[0009] In some embodiments, the length of the FD-OCC depends on the DMRS type.

[0010] In some embodiments, when the DMRS type is type I, the length of the FD-OCC is one of 3, 4, or 6, or one of 3 or 6. In some embodiments, when the DMRS type is type II, the length of the FD-OCC is 4.

[0011] In some embodiments, the length of the FD-OCC is a coefficient of the number of REs in one sign division multiplexing (CDM) group within one physical resource block (PRB) of one OFDM symbol, or a coefficient of the number of REs in one CDM group within two PRBs of one OFDM symbol.

[0012] In some embodiments, the multiple categories of DMRS ports include three categories of DMRS ports. In some embodiments, the FD-OCC lengths of the three categories of DMRS ports are 2, 3, and 6, respectively, or the FD-OCC lengths of the three categories of DMRS ports are 2, 4, and 6, respectively.

[0013] In some embodiments, the multiple categories of DMRS ports include four categories of DMRS ports. In some embodiments, the FD-OCC lengths of the four categories of DMRS ports are 2, 3, 4, and 6, respectively.

[0014] In some embodiments, if multiple categories of DMRS ports include more than two categories of DMRS ports, the first DMRS table corresponds to DMRS type I.

[0015] In some embodiments, if multiple categories of DMRS ports include up to two categories of DMRS ports, the first DMRS table corresponds to DMRS type II.

[0016] In some embodiments, multiple categories of code division multiplexing (CDM) groups for a DMRS port are the same. In some embodiments, each CDM group corresponds to one of the multiple categories of a DMRS port.

[0017] In some embodiments, for a single CDM group, the resource element (RE) occupied by multiple categories of DMRS ports is the same. In some embodiments, the multiple categories of DMRS ports may reside on the same OFDM symbol or on different OFDM symbols.

[0018] In some embodiments, the multiple categories of DMRS ports include DMRS ports of a second category having DMRS type I FD-OCC of length 3, and satisfy at least one of the following: If the number of consecutive DMRS OFDM symbols is 1, the multiple categories of DMRS ports include DMRS ports {0,8,9,2,10,11}. If the number of consecutive DMRS OFDM symbols is 1, CDM group 0 includes DMRS ports {0,8,9} and CDM group 1 includes DMRS ports {2,10,11}. If the number of consecutive DMRS OFDM symbols is 2, the multiple categories of DMRS ports include DMRS ports {0,8,9,2,10,11,4,12,13,6,14,15}. If there are two consecutive DMRS OFDM symbols, CDM group 0 includes DMRS ports {0, 4, 8, 9, 12, 13}, and CDM group 1 includes DMRS ports {2, 6, 10, 11, 14, 15}.

[0019] In some embodiments, the first DMRS parameter includes Y DMRS ports, where Y is an integer value representing the number of CDM groups without data, satisfying at least one of the following: If Y DMRS ports include at least one of the DMRS ports {8-15}, then the number of CDM groups without data is 2. If Y DMRS ports include only one or more from the DMRS ports {0,8,9,4,12,13}, then the number of CDM groups without data is 1 for Y DMRS ports, associated with a first value in the field, or 2, associated with a second value in the field. If Y is 2 and the number of consecutive DMRS OFDM symbols is 1, then Y DMRS ports include one of the DMRS ports {8,9} or DMRS ports {10,11}. If Y is 3 and the number of consecutive DMRS OFDM symbols is 1, then Y DMRS ports include one of the following: DMRS ports {0,8,9}, DMRS ports {2,10,11}, or DMRS ports {8,10,11}. If Y is 4 and the number of consecutive DMRS OFDM symbols is 1, then Y DMRS ports include one of the following: DMRS ports {8,9,10,11}. If Y is 2 and the number of consecutive DMRS OFDM symbols is 2, then Y DMRS ports include one of the following: DMRS ports {8,9}, DMRS ports {10,11}, DMRS ports {12,13}, or DMRS ports {14,15}. If Y is 3 and the number of consecutive DMRS OFDM symbols is 2, then Y DMRS ports include one of the following: DMRS ports {0,8,9}, DMRS ports {2,10,11}, DMRS ports {8,10,11}, DMRS ports {4,12,13}, DMRS ports {6,14,15}, DMRS ports {10,11,15}, or DMRS ports {8,9,12}. Alternatively, if Y is 4 and the number of consecutive DMRS OFDM symbols is 2, then Y DMRS ports include one of the following: DMRS ports {8,9,10,11}, DMRS ports {8,9,12,13}, DMRS ports {12,13,14,15}, or DMRS ports {10,11,14,15}.

[0020] In some embodiments, the multiple categories of DMRS ports further include a first category of DMRS ports with a length of 2 FD-OCC.

[0021] In some embodiments, if the first DMRS table is for a physical downlink shared channel (PDSCH), the first DMRS table satisfies at least one of the following: The first DMRS parameter includes a parameter relating to the length of the FD-OCC of the DMRS ports from DMRS port {0,2,4,6}. If the first DMRS parameter includes Y DMRS ports, and Y DMRS ports include one or more DMRS ports from DMRS port {0,2,4,6}, then the length of the FD-OCC of one or more DMRS ports from DMRS port {0,2,4,6} depends on the relationship between Y DMRS ports and DMRS ports {8-15}. Alternatively, the length of the FD-OCC of DMRS port {0,2,4,6} is 2 or 3.

[0022] In some embodiments, the length of the FD-OCC of one or more DMRS ports from DMRS ports {0,2,4,6} depends on the relationship between Y DMRS ports and DMRS ports {8~1}, satisfying at least one of the following: If Y DMRS ports include at least one port from DMRS ports {8~15}, then the length of the FD-OCC of one DMRS port from DMRS ports {0,2,4,6} is 3. Or, if Y DMRS ports include at least one port from DMRS ports {8~15} within a single CDM group, then the length of the FD-OCC of one DMRS port from DMRS ports {0,2,4,6} is 3, and a single CDM group includes one DMRS port.

[0023] In some embodiments, the multiple categories of DMRS ports include DMRS ports of a first category having a first FD-OCC of length 2 and DMRS ports of a second category having a second FD-OCC of length L, where L is 3, 6, or 4. In some embodiments, for a single CDM group, DMRS ports of a first category having a first FD-OCC and DMRS ports of a second category having a second FD-OCC share the same DMRS port index. If the first DMRS table is for physical uplink shared channels (PUSCH), DMRS ports of a first category having a first FD-OCC and DMRS ports of a second category having a second FD-OCC will share the same DMRS port index. If the first DMRS table is for physical downlink shared channels (PDSCH), DMRS ports of a first category having a first FD-OCC and DMRS ports of a second category having a second FD-OCC will have different DMRS port indexes. If a DMRS port of a first category having a first FD-OCC and a DMRS port of a second category having a second FD-OCC have the same DMRS port index, and the first DMRS table is for PDSCH, the method further includes determining the FD-OCC of the DMRS ports having the same DMRS port index by a wireless communication device. If a DMRS port of a first category having a first FD-OCC and a DMRS port of a second category having a second FD-OCC have the same DMRS port index, and the first DMRS table is for PDSCH, the first DMRS parameter includes a second parameter relating to the length of the FD-OCC of the DMRS ports having the same DMRS port index.Alternatively, if a DMRS port of a first category having a first FD-OCC and a DMRS port of a second category having a second FD-OCC have the same DMRS port index, and the first DMRS table is for PDSCH, then the first DMRS parameter is at least one of the following: if the condition is not met, a parameter relating to the length of the FD-OCC of the DMRS ports having the same DMRS port index; and if the condition is met, the length of the FD-OCC of the DMRS ports having the same DMRS port index is L.

[0024] In some embodiments, the condition includes that Y DMRS ports include at least one DMRS port from a second set of DMRS ports, that Y DMRS ports include at least one DMRS port in one CDM group from the second set of DMRS ports, or that Y DMRS ports include more than N DMRS ports in one CDM group. In some embodiments, the condition includes that a first DMRS parameter includes Y DMRS ports, that the indices of DMRS ports in the second set of DMRS ports are not shared between different FD-OCC lengths, or that the length of the FD-OCC of DMRS ports in the second set of DMRS ports is greater than 2, or that the D-OCC of DMRS ports in the second set of DMRS ports does not belong to an FD-OCC set that includes an FD-OCC where all L elements are 1 and an FD-OCC with L / 2 iterations of [1,-1]. In some embodiments, one CDM group includes DMRS ports having the same DMRS port index, where Y is an integer.

[0025] In some embodiments, the first FD-OCC includes an FD-OCC of [1,1], and the second FD-OCC includes an FD-OCC where L elements are all 1, when L is 3, 4, or 6. In some embodiments, the first FD-OCC includes an FD-OCC of [1,-1], and the second FD-OCC includes an FD-OCC having elements that consist of L / 2 repetitions of [1,-1], when L is 4 or 6.

[0026] In some embodiments, the first DMRS parameter includes Y DMRS ports and the number of CDM groups without data, satisfying at least one of the following: the number of CDM groups without data is determined according to at least one of the categories of the Y DMRS ports, FD-OCC, TD-OCC, or the index of the CDM groups containing the Y DMRS ports; or the number of CDM groups without data is the maximum value if the Y DMRS ports include DMRS ports of a second category. Y can be an integer value.

[0027] In some embodiments, the first DMRS parameter includes Y DMRS ports and several consecutive DMRS OFDM symbols, satisfying at least one of the following: the number of consecutive DMRS OFDM symbols is determined by the category of the Y DMRS ports; or the number of consecutive DMRS OFDM symbols is the maximum value if the Y DMRS ports include DMRS ports of a second category.

[0028] In some embodiments, multiple categories of DMRS ports are indexed together. In some embodiments, the index of a DMRS port is determined by first indexing across DMRS ports of a first category, and then indexing across DMRS ports of a second category. In some embodiments, DMRS ports of a first category and some DMRS ports of a second category share the same DMRS port index. In some embodiments, DMRS ports of a third category and DMRS ports of a fourth category share the same DMRS port index. In some embodiments, the FD-OCC length of a DMRS port of a first category is 2, the FD-OCC length of a DMRS port of a second category is greater than 2, the FD-OCC length of a DMRS port of a third category is 4, and the FD-OCC length of a DMRS port of a fourth category is 6.

[0029] In some embodiments, the first DMRS parameter includes Y DMRS ports in one CDM group, where the Y DMRS ports have an FD-OCC of length L, where L is a positive integer, and Y is an integer less than or equal to the product of L and the number of consecutive DMRS OFDM symbols.

[0030] In some embodiments, multiple categories of DMRS ports include categories of DMRS ports having FD-OCC of length L of DMRS type I, satisfying at least one of the following: If the number of consecutive DMRS OFDM symbols is 1, the multiple categories of DMRS ports include 8 DMRS ports {0,1,8,9,2,3,10,11}. If the number of consecutive DMRS OFDM symbols is 1, CDM group 0 includes DMRS ports {0,1,8,9} and CDM group 1 includes DMRS ports {2,3,10,11}. If the number of consecutive DMRS OFDM symbols is 2, the multiple categories of DMRS ports include 16 DMRS ports {0,1,8,9,2,3,10,11,4,5,12,13,6,7,14,15}. If the number of consecutive DMRS OFDM symbols is 2, then CDM group 0 includes DMRS ports {0,1,4,5,8,9,12,13}, and CDM group 1 includes DMRS ports {2,3,6,7,10,11,14,15}. L can be 4.

[0031] In some embodiments, the first DMRS parameter includes Y DMRS ports and the number of CDM groups without data, satisfying at least one of the following: If Y DMRS ports include at least one of DMRS ports {8-15}, the number of CDM groups without data is 2. If Y DMRS ports include only one or more from DMRS ports {0,1,8,9,4,5,12,13}, the number of CDM groups without data is 1 for Y DMRS ports, associated with a first value in the field, or 2, associated with a second value in the field, where Y is an integer. If Y is 2 and the number of consecutive DMRS OFDM symbols is 1, then Y DMRS ports include one of DMRS ports {8,9} or DMRS ports {10,11}. If Y is 3 and the number of consecutive DMRS OFDM symbols is 1, then Y DMRS ports include one of the following: DMRS ports {0,8,9}, DMRS ports {2,10,11}, or DMRS ports {8,10,11}. If Y is 4 and the number of consecutive DMRS OFDM symbols is 1, then Y DMRS ports include one of the following: DMRS ports {8,9,10,11}, DMRS ports {0,1,8,9}, or DMRS ports {2,3,10,11}. If Y is 2 and the number of consecutive DMRS OFDM symbols is 2, then Y DMRS ports include one of the following: DMRS ports {8,9}, DMRS ports {10,11}, DMRS ports {12,13}, or DMRS ports {14,15}. If Y is 3 and the number of consecutive DMRS OFDM symbols is 2, then Y DMRS ports include one of the following: DMRS ports {0,8,9}, DMRS ports {2,10,11}, DMRS ports {8,10,11}, DMRS ports {4,12,13}, DMRS ports {6,14,15}, or DMRS ports {8,9,12}, DMRS ports {10,11,14}.If Y is 4 and the number of consecutive DMRS OFDM symbols is 2, then Y DMRS ports include one of the following: DMRS ports {8,9,10,11}, DMRS ports {12-15}, DMRS ports {8,9,12,13}, DMRS ports {0,1,8,9}, DMRS ports {2,3,10,11}, DMRS ports {6,7,10,11}, DMRS ports {4,5,12,13}, or DMRS ports {10,11,14,15}. If Y is 4 and the number of consecutive DMRS OFDM symbols is 2, then the first DMRS table includes a first value in the field where Y DMRS ports are DMRS ports {0,1,4,5} and the number of CDM groups without data is 1, and a second value in the field where Y DMRS ports are DMRS ports {0,1,4,5} and the number of CDM groups without data is 2.

[0032] In some embodiments, multiple categories of DMRS ports include categories of DMRS ports having DMRS Type II FD-OCCs of length L, satisfying at least one of the following: If the number of consecutive DMRS OFDM symbols is 1, multiple categories of DMRS ports include DMRS ports {0-5, 12-17}. If the number of consecutive DMRS OFDM symbols is 1, CDM group 0 includes DMRS ports {0, 1, 12, 13}, CDM group 1 includes DMRS ports {2, 3, 14, 15}, and CDM group 2 includes DMRS ports {4, 5, 16, 17}. If the number of consecutive DMRS OFDM symbols is 2, multiple categories of DMRS ports include DMRS ports {0-23}. If the number of consecutive DMRS OFDM symbols is 2, then CDM group 0 includes DMRS ports {0,1,12,13,6,7,18,19}, CDM group 1 includes DMRS ports {2,3,14,15,8,9,20,21}, and CDM group 2 includes DMRS ports {4,5,16,17,10,11,22,23}. L can be 4.

[0033] In some embodiments, the first DMRS parameter includes Y DMRS ports and the number of CDM groups without data, satisfying at least one of the following: If Y DMRS ports include at least one of the DMRS ports {8-15}, the number of CDM groups without data is 2. If Y DMRS ports include only one or more from the DMRS ports {0,1,8,9,4,5,12,13}, the number of CDM groups without data is 1 for Y DMRS ports, associated with a first value in the field, or 2, associated with a second value in the field. Y can be an integer.

[0034] In some embodiments, the multiple categories of DMRS ports further include DMRS ports of a first category with an FD-OCC length of 2, and if the first DMRS table is for physical downlink shared channels (PDSCH), then at least one of the following applies: The first DMRS parameter includes a parameter relating to the FD-OCC length of the DMRS ports in the first DMRS port set. The wireless communication device determines the FD-OCC length of the DMRS ports from the first DMRS port set. If the first DMRS parameter includes Y DMRS ports, one or more DMRS ports from the first DMRS port set, then the FD-OCC length of one or more DMRS ports from the first DMRS port set depends on the relationship between the Y DMRS ports and the second DMRS port set. Alternatively, the FD-OCC length of the DMRS ports in the first DMRS port set is 2 or L.

[0035] In some embodiments, the length of the FD-OCC of one or more DMRS ports from a first DMRS port set depends on the relationship between Y DMRS ports and a second DMRS port set, satisfying at least one of the following: if Y DMRS ports include at least one port from the second DMRS port set, the length of the FD-OCC of one DMRS port from the first DMRS port set is L; or if Y DMRS ports include at least one port from the second DMRS port set in one CDM group, the length of the FD-OCC of one DMRS port from the first DMRS port set is L, and one CDM group includes one DMRS port.

[0036] In some embodiments, for DMRS type I, the first DMRS port set includes DMRS ports {0-7}, and the second DMRS port set includes DMRS ports {8-15}. In some embodiments, for DMRS type II, the first DMRS port set includes DMRS ports {0-11}, and the second DMRS port set includes DMRS ports {12-23}.

[0037] In some embodiments, the wireless communication device has an FD-OCC of length L, and a resource element (k,l) p,μ Determine the sequence of DMRS port p that is mapped to: [ka] Here, k = 2*L*n + 2*k' + Δ, or k = (2*L*n + 2*k' + Δ) mod 12, where k is the subcarrier index, and k' = 0, 1, ..., L-1, where k' is an intermediate parameter for determining the index of the DMRS subcarrier k. [ka] Here, l is the OFDM symbol of the DMRS port, and l' is the index of the OFDM symbol within an OFDM symbol group. l'=0,1,...X-1, where X is the number of DMRS OFDM symbols in a DMRS OFDM symbol group and / or the number of consecutive DMRS OFDM symbols. n is a non-negative integer value. f (k', w t (l'), and Δ are provided by a defined table containing the mapping between DMRS ports, w f (k', w t (l'), and Δ. f (k') is FD-OCC, w t (l') is the TD-OCC, and Δ is the RE offset associated with the CDM group. μ is a parameter relating to the subcarrier spacing. p is the index of the DMRS port. DMRS port p is a type I DMRS port. r(L*n+k') is the symbol with index L*n+k' in the symbol sequence of r(·).

[0038] In some embodiments, the wireless communication device uses resource elements (k,l) according to the following: p,μ Determine the sequence of DMRS port p in one of several categories of DMRS ports that are mapped to: [ka] Here, [ka] Here, k is the index of the subcarrier, k'=0,1,...,L-1, k' is an intermediate parameter for determining the index of the DMRS subcarrier k, and L is the length of one FD-OCC. [ka] where l is an OFDM symbol of the DMRS port, and l’ is the index of an OFDM symbol within one OFDM symbol group. l’ = 0, 1,... X - 1, where X is the number of DMRS OFDM symbols within one DMRS OFDM symbol group and / or the number of consecutive DMRS OFDM symbols. n includes non-negative integer values. w f (k’), w t (l’), and Δ are provided by a defined table including the mapping between DMRS ports, w f (k’), w t (l’), and Δ. w f (k’) is FD-OCC, w t (l’) is TD-OCC, and Δ is the RE offset associated with the CDM group. μ is a parameter related to the subcarrier spacing. p is the index of the DMRS port. The DMRS port is a type I DMRS port. r(L*n + k’) is the symbol having the index L*n + k’ within the symbol sequence of r(·).

[0039] In some embodiments, L includes one or more values from {2, 3, 4, 6}.

[0040] In some embodiments, L includes one or more values from {1, 2, 3, 4, 6}.

[0041] In some embodiments, L includes more than one value, and each of the more than one values corresponds to one category among a plurality of categories of DMRS ports.

[0042] In some embodiments, X is 1 or 2.

[0043] In some embodiments, the first DMRS table is enabled by the first information. In some embodiments, the number of bits in the field is determined by the first information.

[0044] In some embodiments, the first information includes at least one of the following: a Type I or Type II DMRS type, the maximum number of consecutive DMRS OFDM symbols, a second DMRS parameter, or the number of DMRS ports. In some embodiments, different DMRS types correspond to different frequency domain patterns of DMRS ports.

[0045] In some embodiments, if the first table includes DMRS ports of physical uplink shared channels (PUSCH) and the first information is used to select the first table, the first information further includes the number of DMRS ports.

[0046] In some embodiments, a first DMRS table containing a first DMRS parameter for multiple categories of DMRS ports satisfies at least one of the following: the first DMRS parameter is associated with one or more values ​​in a field; or the first DMRS parameter is associated with one value in a field and one number in a codeword, and contains one or more categories of DMRS ports.

[0047] In some embodiments, a first DMRS parameter associated with one value and one codeword number of a field includes more categories than one of the DMRS ports and satisfies at least one of the following: more categories than one of the DMRS ports are in more than one CDM group, and each of the more than one CDM group includes one category of DMRS ports; more categories than one of the DMRS ports are for different channels; if one value and one codeword of a field are for one channel, then the DMRS ports for that channel belong to one of the more than one categories; or, if one value and one codeword number of a field are for one channel, then the DMRS ports for that channel belong to one of the more than one categories, and that category depends on at least one of the second parameter included in the first parameter or the second parameter included in the second signaling.

[0048] In some embodiments, the second signaling includes at least one of downlink control information (DCI), radio resource control (RRC), or media access control element (MAC-CE) signaling.

[0049] In some embodiments, the signaling includes at least one of DCI, RRC, or MAC-CE signaling.

[0050] In some embodiments, the first DMRS parameter includes at least one of the following: a second parameter for each CDM group without data; a relationship between the second parameters of different CDM groups without data; or a relationship between the second parameter of a DMRS port of a wireless communication device and the second parameter of the DMRS port of one or more potentially concurrently scheduled wireless communication devices.

[0051] In some embodiments, the wireless communication device determines the DMRS port of one or more potential concurrently scheduled wireless communication devices according to a first parameter.

[0052] In some embodiments, the first parameter includes Y DMRS ports and satisfies at least one of the following: the Y DMRS ports include up to N DMRS ports in one CDM group, where N is the product of the length of the FD-OCC of the DMRS ports in one CDM group and the number of consecutive DMRS OFDM symbols. In some embodiments, the DMRS ports in different CDM groups of the Y DMRS ports correspond to different values ​​of the second parameter.

[0053] In some embodiments, the second parameter includes at least one of the following: the length of a frequency-domain orthogonal cover code (FD-OCC), the length of a time-domain orthogonal cover code (TD-OCC), the number of resource elements (REs) of a DMRS port in one OFDM symbol of one physical resource block (PRB), or the number of DMRS OFDM symbol groups in one TD-OCC, where one DMRS OFDM symbol group includes one or more consecutive DMRS OFDM symbols.

[0054] In some embodiments, the radio communication node determines a first demodulated reference signal (DMRS) table. In some embodiments, the radio communication node transmits the values ​​of fields in the signaling to the radio communication device. In some embodiments, the radio communication node causes the radio communication device to determine first DMRS parameters according to the first DMRS table and the values ​​of the fields. In some embodiments, the first DMRS table includes a mapping between the values ​​of fields in the signaling and the values ​​of the first DMRS parameters. In some embodiments, the first DMRS table includes first DMRS parameters having values ​​associated with multiple categories of DMRS ports, where each category of the multiple categories of DMRS ports corresponds to one of multiple second parameters.

[0055] In some embodiments, a wireless communication device receives first information from a wireless communication node. In some embodiments, the wireless communication device determines that a DMRS port category is enabled according to the first information, and the DMRS port category has a frequency domain orthogonal cover code (FD-OCC) of length L, where L is a positive integer value.

[0056] In some embodiments, the wireless communication device has an FD-OCC of length L, and a resource element (k,l) p,μ Determine the sequence of DMRS port p that is mapped to: [ka] Here, k = 2*L*n + 2*k' + Δ, or k = (2*L*n + 2*k' + Δ) mod 12, where k is the subcarrier index, and k' = 0, 1, ..., L-1, where k' is an intermediate parameter for determining the index of the DMRS subcarrier k. [ka] Here, l is the OFDM symbol of the DMRS port, and l' is the index of the OFDM symbol within an OFDM symbol group. l'=0,1,...X-1, where X is the number of DMRS OFDM symbols in a DMRS OFDM symbol group and / or the number of consecutive DMRS OFDM symbols. n is a non-negative integer value. f (k', w t (l'), and Δ are provided by a defined table containing the mapping between DMRS ports, w f (k', w t (l'), and Δ. f (k') is FD-OCC, w t(l') is the TD-OCC, and Δ is the RE offset associated with the CDM group. μ is a parameter relating to the subcarrier spacing. p is the index of the DMRS port. DMRS port p is a type I DMRS port. r(L*n+k') is the symbol with index L*n+k' in the symbol sequence of r(·).

[0057] In some embodiments, L is 2, 3, 4, or 6. In some embodiments, L is 1, 2, 3, 4, or 6. In some embodiments, when L is 4, k = (2*L*n + 2*k' + Δ) mod 12 applies.

[0058] In some embodiments, when L is 4 and DMRS port p is of DMRS type I, at least one of the following applies: The DMRS port occupies REs on two consecutive DMRS PRBs. The number of PRBs in the Bandwidth Portion (BWP) is an integer multiple of 2. The number of PRBs in the DMRS port is an integer multiple of 2. If the BWP does not contain an integer multiple of 2 PRBs, the channel of the DMRS port is not assigned to the start or end PRB of the BWP. If the BWP does not contain an integer multiple of 2 PRBs and a channel of the DMRS port having an FD-OCC of length 4 is assigned to the start or end PRB of the BWP, the channel is associated with a second DMRS port having an FD-OCC length not equal to 4 and corresponds to a DMRS port having an FD-OCC of length 2 in the start or end PRB of the BWP. If n BWPs do not contain integer multiples of two PRBs, and a channel of a DMRS port with an FD-OCC of length 4 is assigned to the start or end PRB of a BWP, then the channel is associated with a second DMRS port with an FD-OCC length not equal to 4. The length of the FD-OCC of the DMRS port of the channel depends on the PRB of the channel.

[0059] In some embodiments, if L is 4 and DMRS port p is of DMRS type I, the wireless communication device determines the PRB groups of the BWP according to the number of PRBs of the BWP and the index of the starting PRB of the BWP, where each PRB group contains two consecutive PRBs, or the wireless communication device determines the PRB groups of PRBs assigned to a channel of a DMRS port having an FD-OCC of length 4.

[0060] In some embodiments, the channels of a DMRS port are assigned to all PRBs of a PRB group. In some embodiments, the channels of a DMRS port are assigned to only a subset of PRBs of a PRB group. In some embodiments, if a PRB group contains only one PRB, the channels of a DMRS port are assigned to any PRB within the PRB group. In some embodiments, if the channels of a DMRS port are assigned to only one PRB within a PRB group, the channels are associated with DMRS ports having a length of not 4. In some embodiments, if the channels of a DMRS port are assigned to only one PRB within a PRB group, the channels are associated with DMRS ports having a length of not 4 within the PRB group. In some embodiments, one PRB resides within one precoding resource block group (PRG).

[0061] In some embodiments, the wireless communication device uses resource elements (k,l) according to the following: p,μ Determine the sequence of DMRS port p in one of several categories of DMRS ports that are mapped to: [ka] Here, [ka] Here, k is the index of the subcarrier, k'=0,1,...,L-1, k' is an intermediate parameter for determining the index of the DMRS subcarrier k, and L is the length of one FD-OCC. [ka] Here, l is the OFDM symbol for the DMRS port, and l' is the index of the OFDM symbol within an OFDM symbol group. l' = 0, 1, ..., X-1, where X is the number of DMRS OFDM symbols in a single DMRS OFDM symbol group and / or the number of consecutive DMRS OFDM symbols. n includes non-negative integer values. w f (k', w t (l'), and Δ are provided by a defined table containing the mapping between DMRS ports, w f (k', w t (l'), and Δ. f (k') is FD-OCC, and w t (l') is the TD-OCC, and Δ is the RE offset associated with the CDM group. μ is a parameter relating to the subcarrier spacing. p is the index of the DMRS port. The DMRS port is a Type II DMRS port. r(L*n+k') and L*n+k' are symbols that have an index in the symbol sequence of r(·).

[0062] In some embodiments, L is 2 or 4.

[0063] In some embodiments, the wireless communication device determines the correspondence between PRB and L according to signaling or rules.

[0064] In some embodiments, the first PRB set corresponds to L equal to 2. In some embodiments, the second PRB set corresponds to L greater than 2. In some embodiments, the first PRB set corresponds to L which is one of 2, 3, or 6. In some embodiments, the second PRB set corresponds to L equal to 4.

[0065] In some embodiments, the first PRB set is determined or obtained via signaling. In some embodiments, the first PRB set includes odd PRGs. In some embodiments, the first PRB set includes odd PRBs. In some embodiments, the first PRB set includes even PRGs. In some embodiments, the first PRB set includes even PRBs.

[0066] In some embodiments, when the number of consecutive DMRS OFDM symbols is 1, the multiple categories of DMRS ports include DMRS ports {0-5, 12-17}. In some embodiments, when the number of consecutive DMRS OFDM symbols is 1, CDM group 0 includes DMRS ports {0,1,12,13}, CDM group 1 includes DMRS ports {2,3,14,15}, and CDM group 2 includes DMRS ports {4,5,16,17}. In some embodiments, when the number of consecutive DMRS OFDM symbols is 2, the multiple categories of DMRS ports include DMRS ports {0-23}. In some embodiments, when the number of consecutive DMRS OFDM symbols is 2, CDM group 0 includes DMRS ports {0,1,12,13,6,7,18,19}, CDM group 1 includes DMRS ports {2,3,14,15,8,9,20,21}, and CDM group 2 includes DMRS ports {4,5,16,17,10,11,22,23}. L can be 4 or 6.

[0067] In some embodiments, the categories of DMRS ports are included in a DMRS table, which includes a mapping between the values ​​of the signaling fields and the values ​​of the first DMRS parameters.

[0068] In some embodiments, the first DMRS parameter includes Y DMRS ports and the number of CDM groups without data, satisfying at least one of the following: If Y DMRS ports include at least one of the DMRS ports {12-23}, the number of CDM groups without data is 2. If Y DMRS ports include only one or more DMRS ports from the DMRS ports {0,1,6,7,12,13,18,19}, the number of CDM groups without data is 1, associated with a first value in the field, or 2, associated with a second value in the field, or 3, associated with a third value in the field, where Y is an integer value.

[0069] In some embodiments, a non-temporary computer-readable medium, when executed by at least one processor, stores instructions causing at least one processor to perform any of the methods disclosed herein.

[0070] In some embodiments, the apparatus includes at least one processor for carrying out any of the methods disclosed herein.

[0071] In some embodiments, the wireless communication device determines a first demodulated reference signal (DMRS) table. In some embodiments, the wireless communication device receives field values ​​in a signaling from a wireless communication node. The signaling can be a downlink control information (DCI) signaling, a radio access control (RRC) signaling, or a media access control element (MAC-CE) signaling. In some embodiments, the wireless communication device determines first DMRS parameters according to the first DMRS table and field values. The first DMRS table may include a mapping between the field values ​​in the signaling and the values ​​of the first DMRS parameters. The first DMRS table may include first DMRS parameters having values ​​associated with multiple categories of DMRS ports. Each of the multiple categories of DMRS ports may correspond to one of multiple second parameters.

[0072] In one embodiment, indicating DMRS ports based on the DMRS table disclosed herein can support a larger number of DMRS ports. In one embodiment, the DMRS table includes DMRS parameters for more categories than one of the DMRS ports. Each of the more categories than one of the DMRS ports corresponds to its respective second parameter. Furthermore, a single DMRS table may include more categories than one of the DMRS ports to increase scheduling flexibility. The gNB can dynamically switch between different categories of DMRS ports and schedule older and newer UEs on demand. The index of DMRS ports can be shared with different categories of DMRS ports to reduce signaling overhead while supporting or allowing scheduling flexibility. Some parameters may be considered to obtain DMRS ports for concurrently scheduled UEs. Thus, a UE can obtain a more accurate estimate of interference from concurrently scheduled UEs while enabling more DMRS ports. By enabling a larger number of DMRS ports, a radio communication node can communicate with a larger number of radio communication devices, enabling more layers of MIMO transmission, thereby improving the spectral efficiency of the communication. The present invention provides, for example, the following: (Item 1) It is a method, The wireless communication device determines the first demodulated reference signal (DMRS) table, The wireless communication device receives the value of a field in the signaling from the wireless communication node, The wireless communication device determines the first DMRS parameters according to the first DMRS table and the values ​​of the fields. Includes, The first DMRS table includes a mapping between the values ​​of the fields in the signaling and the values ​​of the first DMRS parameters. The method wherein the first DMRS table includes the first DMRS parameters for multiple categories of DMRS ports, and each of the multiple categories of DMRS ports corresponds to its respective second parameter. (Item 2) The first of the multiple categories of the aforementioned DMRS port corresponds to an FD-OCC of length 2, or If the first DMRS table is for DMRS type I, the first DMRS table includes a first value in a field having the number of CDM groups where Y DMRS ports are DMRS ports {0, 1, 4, 5} and the data is not 1, and a second value in a field having the number of CDM groups where Y DMRS ports are DMRS ports {0, 1, 4, 5} and the data is not 2. The method described in item 1, which is at least one of the following. (Item 3) The method described in item 1, wherein the second category of the multiple categories of the DMRS port corresponds to an FD-OCC of a length greater than 2. (Item 4) The method according to item 3, wherein the length of the FD-OCC is one of 3, 4, or 6. (Item 5) The length of the FD-OCC depends on the DMRS type, as described in item 3. (Item 6) If the DMRS type is of type I, the length of the FD-OCC is one of 3, 4, or 6, or one of 3 or 6, or If the DMRS type is of type II, the length of the FD-OCC is 4. The method described in item 5. (Item 7) The length of the FD-OCC is, The coefficient of the RE number for one sign division multiplexing (CDM) group within one physical resource block (PRB) of one OFDM symbol, or The coefficient of the RE number for one CDM group within two PRBs of one OFDM symbol. The method described in item 3. (Item 8) The aforementioned multiple categories of DMRS ports include three categories of DMRS ports, The lengths of the FD-OCCs for the three categories of the DMRS port are 2, 3, and 6, respectively, or The lengths of the FD-OCCs for the three categories of the DMRS port are 2, 4, and 6, respectively. The method described in item 1. (Item 9) The aforementioned multiple categories of DMRS ports include four categories of DMRS ports, The lengths of the FD-OCCs for the four categories of the DMRS port are 2, 3, 4, and 6, respectively. The method described in item 1. (Item 10) If the multiple categories of the DMRS port include more than two categories of the DMRS port, the first DMRS table corresponds to the method described in item 1, for DMRS type I. (Item 11) If the multiple categories of the DMRS port include a maximum of two categories of DMRS ports, the first DMRS table corresponds to the method described in item 1, which is the method described in item 1, for DMRS type II. (Item 12) The multiple categories of code division multiplexing (CDM) groups of the aforementioned DMRS port are the same, or Each CDM group corresponds to multiple categories of the DMRS port. The method described in item 1, which is at least one of the following. (Item 13) For a single CDM group, the resource elements (REs) occupied by multiple categories of DMRS ports of the DMRS port are the same, or The multiple categories of the aforementioned DMRS port may be on the same OFDM symbol or on different OFDM symbols. The method described in item 1, which is at least one of the following. (Item 14) The multiple categories of the DMRS ports include a second category of DMRS ports having a DMRS type I FD-OCC of length 3, and If the number of consecutive DMRS OFDM symbols is 1, then the multiple categories of the DMRS port include DMRS ports {0, 8, 9, 2, 10, 11}. If the number of consecutive DMRS OFDM symbols is 1, then CDM group 0 includes DMRS ports {0,8,9}, and CDM group 1 includes DMRS ports {2,10,11}. If the number of consecutive DMRS OFDM symbols is 2, the multiple categories of DMRS ports include DMRS ports {0, 8, 9, 2, 10, 11, 4, 12, 13, 6, 14, 15}, If the number of consecutive DMRS OFDM symbols is 2, then CDM group 0 includes DMRS ports {0, 4, 8, 9, 12, 13}, and CDM group 1 includes DMRS ports {2, 6, 10, 11, 14, 15}. A method according to item 1, which satisfies at least one of the following conditions. (Item 15) The first DMRS parameter described above includes Y DMRS ports, where Y is an integer value, the number of CDM groups without data, and If the Y DMRS ports include at least one of the DMRS ports {8-15}, then the number of CDM groups without data is 2. If the Y DMRS ports include only one or more DMRS ports {0, 8, 9, 4, 12, 13}, then the number of CDM groups without data is 1 for the Y MRS ports and associated with the first value of the field, or 2 and associated with the second value of the field. If Y is 2 and the number of consecutive DMRS OFDM symbols is 1, then the Y DMRS ports include one of DMRS ports {8,9} or DMRS ports {10,11}. If Y is 3 and the number of consecutive DMRS OFDM symbols is 1, then the Y DMRS ports include one of DMRS ports {0,8,9}, DMRS ports {2,10,11}, or DMRS ports {8,10,11}. If Y is 4 and the number of consecutive DMRS OFDM symbols is 1, then the Y DMRS ports include DMRS ports {8, 9, 10, 11}. If Y is 2 and the number of consecutive DMRS OFDM symbols is 2, then the Y DMRS ports include one of DMRS ports {8,9}, DMRS ports {10,11}, DMRS ports {12,13}, or DMRS ports {14,15}. If Y is 3 and the number of consecutive DMRS OFDM symbols is 2, then the Y DMRS ports include one of the following: DMRS ports {0,8,9}, DMRS ports {2,10,11}, DMRS ports {8,10,11}, DMRS ports {4,12,13}, DMRS ports {6,14,15}, DMRS ports {10,11,15}, or DMRS ports {8,9,12}, or If Y is 4 and the number of consecutive DMRS OFDM symbols is 2, then the Y DMRS ports include one of the following: DMRS ports {8,9,10,11}, DMRS ports {8,9,12,13}, DMRS ports {12,13,14,15}, and DMRS ports {10,11,14,15}. A method according to item 14, which satisfies at least one of the following conditions. (Item 16) The method according to item 14, wherein the multiple categories of DMRS ports further include DMRS ports of a first category with an FD-OCC length of 2. (Item 17) If the first DMRS table is for a physical downlink shared channel (PDSCH), then the first DMRS table is: The first DMRS parameter described above includes a parameter relating to the length of the FD-OCC of the DMRS ports from DMRS ports {0,2,4,6}. The first DMRS parameter includes Y DMRS ports, and if the Y DMRS ports include one or more DMRS ports from DMRS ports {0, 2, 4, 6}, then the length of the FD-OCC of the one or more DMRS ports from DMRS ports {0, 2, 4, 6} depends on the relationship between the Y DMRS ports and DMRS ports {8~15}, or The length of the FD-OCC for DMRS ports {0,2,4,6} is 2 or 3. A method of item 16 that satisfies at least one of the following conditions. (Item 18) The length of the FD-OCC of one or more DMRS ports from DMRS ports {0,2,4,6} depends on the relationship between the Y DMRS ports and DMRS ports {8~1}, and If the Y DMRS ports include at least one port from DMRS ports {8-15}, then the length of the FD-OCC of one DMRS port from DMRS ports {0,2,4,6} is 3, or If the Y DMRS ports include at least one port from DMRS ports {8-15} within a single CDM group, then the length of the FD-OCC of one DMRS port from DMRS ports {0,2,4,6} is 3, and the single CDM group includes the single DMRS port. A method according to item 17, which satisfies at least one of the following conditions. (Item 19) The multiple categories of the DMRS ports include a first category of DMRS ports having a first FD-OCC of length 2, and a second category of DMRS ports having a second FD-OCC of length L, where L is 3, 6, or 4. For one CDM group, A DMRS port of category 1 having a first FD-OCC and a DMRS port of category 2 having a second FD-OCC share the same DMRS port index. If the first DMRS table is for physical uplink shared channels (PUSCH), then the DMRS ports of the first category having the first FD-OCC and the DMRS ports of the second category having the second FD-OCC will share the same DMRS port index. If the first DMRS table is for physical downlink shared channels (PDSCH), then the DMRS ports of the first category having the first FD-OCC and the DMRS ports of the second category having the second FD-OCC will have different DMRS port indexes. If the DMRS ports of the first category having the first FD-OCC and the DMRS ports of the second category having the second FD-OCC have the same DMRS port index, and the first DMRS table is for PDSCH, the method further includes determining the FD-OCC of the DMRS ports having the same DMRS port index by the wireless communication device. If the DMRS ports of the first category having the first FD-OCC and the DMRS ports of the second category having the second FD-OCC have the same DMRS port index, and the first DMRS table is for PDSCH, then the first DMRS parameter includes a second parameter relating to the length of the FD-OCC of the DMRS ports having the same DMRS port index, or If the DMRS ports of the first category having the first FD-OCC and the DMRS ports of the second category having the second FD-OCC have the same DMRS port index, and the first DMRS table is for PDSCH, then the first DMRS parameters include, if the condition is not met, a parameter relating to the length of the FD-OCC of the DMRS ports having the same DMRS port index, and if the condition is met, the length of the FD-OCC of the DMRS ports having the same DMRS port index is L. The method described in item 1, which is at least one of the following. (Item 20) The aforementioned conditions are, The Y DMRS ports include at least one DMRS port from a second set of DMRS ports. The Y DMRS ports include at least one DMRS port in one CDM group from a second set of DMRS ports, or The Y DMRS ports mentioned above include more than N DMRS ports within a single CDM group. It includes at least one of the following: The first DMRS parameter includes the Y DMRS ports, the indices of the DMRS ports in the second DMRS port set are not shared between different FD-OCC lengths, or the length of the FD-OCC of the DMRS ports in the second DMRS port set is greater than 2, or the D-OCC of the DMRS ports in the second DMRS port set does not belong to an FD-OCC set that includes an FD-OCC where all L elements are 1 and an FD-OCC where L / 2 iterations are [1,-1]. The aforementioned CDM group includes DMRS ports having the same DMRS port index, where Y is an integer. The method described in item 19. (Item 21) If L is 3, 4, or 6, the first FD-OCC includes the [1,1] FD-OCC, and the second FD-OCC includes the L FD-OCCs where all elements are 1, or If L is 4 or 6, the first FD-OCC includes an FD-OCC of [1,-1], and the second FD-OCC includes an FD-OCC having an element with L / 2 repeats of [1,-1]. The method described in item 19 or 20, which is at least one of the following. (Item 22) The first DMRS parameter described above includes Y DMRS ports and the number of CDM groups without data, and The number of CDM groups for which data is missing is determined according to at least one of the categories of the Y DMRS ports, FD-OCC, TD-OCC, or the index of the CDM group containing the Y DMRS ports, or If the Y DMRS ports include DMRS ports of the second category, the number of CDM groups for which there is no data is the maximum value. Satisfy at least one of the following conditions, Y is an integer value. The method described in item 1. (Item 23) The first DMRS parameter includes the Y DMRS ports and several consecutive DMRS OFDM symbols, The number of consecutive DMRS OFDM symbols is determined by the categories of the Y DMRS ports, or If the Y DMRS ports include DMRS ports of the second category, the number of consecutive DMRS OFDM symbols is the maximum value. A method according to item 1, which satisfies at least one of the following conditions. (Item 24) The multiple categories of the aforementioned DMRS ports are indexed together. The index of DMRS ports is determined by performing a first index across the DMRS ports of the first category, and then indexing across the DMRS ports of the second category. DMRS ports in Category 1 and some DMRS ports in Category 2 share the same DMRS port index, or DMRS ports in Category 3 and Category 4 share the same DMRS port index. At least one of the following: The method according to item 1, wherein the length of the FD-OCC of the DMRS port of category 1 is 2, the length of the FD-OCC of the DMRS port of category 2 is greater than 2, the length of the FD-OCC of the DMRS port of category 3 is 4, and the length of the FD-OCC of the DMRS port of category 4 is 6. (Item 25) The method according to item 1, wherein the first DMRS parameter comprises Y DMRS ports in one CDM group, the Y DMRS ports having an FD-OCC of length L, where L is a positive integer value, and Y is an integer value less than or equal to the product of L and the number of consecutive DMRS OFDM symbols. (Item 26) The multiple categories of DMRS ports include a category of DMRS ports having an FD-OCC of length L of DMRS type I, and If the number of consecutive DMRS OFDM symbols is 1, then the multiple categories of DMRS ports include 8 DMRS ports {0, 1, 8, 9, 2, 3, 10, 11}. If the number of consecutive DMRS OFDM symbols is 1, then CDM group 0 includes DMRS ports {0,1,8,9}, and CDM group 1 includes DMRS ports {2,3,10,11}. If the number of consecutive DMRS OFDM symbols is 2, the multiple categories of DMRS ports include 16 DMRS ports {0, 1, 8, 9, 2, 3, 10, 11, 4, 5, 12, 13, 6, 7, 14, 15}, If the number of consecutive DMRS OFDM symbols is 2, CDM group 0 includes DMRS ports {0,1,4,5,8,9,12,13}, and CDM group 1 includes DMRS ports {2,3,6,7,10,11,14,15}. Satisfy at least one of the following conditions, L is either 4 or 6. The method described in item 1. (Item 27) The aforementioned categories of DMRS ports include a category of DMRS ports having an FD-OCC of length L of DMRS Type II, and If the number of consecutive DMRS OFDM symbols is 1, then the multiple categories of the DMRS port include DMRS ports {0-5, 12-17}. If the number of consecutive DMRS OFDM symbols is 1, then CDM group 0 includes DMRS ports {0,1,12,13}, CDM group 1 includes DMRS ports {2,3,14,15}, and CDM group 2 includes DMRS ports {4,5,16,17}. If the number of consecutive DMRS OFDM symbols is 2, the multiple categories of DMRS ports include DMRS ports {0-23}. If the number of consecutive DMRS OFDM symbols is 2, then CDM group 0 includes DMRS ports {0,1,12,13,6,7,18,19}, CDM group 1 includes DMRS ports {2,3,14,15,8,9,20,21}, and CDM group 2 includes DMRS ports {4,5,16,17,10,11,22,23}. Satisfy at least one of the following conditions, L is 4. The method described in item 1. (Item 28) The first DMRS parameter includes Y DMRS ports and the number of CDM groups without data, If the Y DMRS ports include at least one of the DMRS ports {8-15}, then the number of CDM groups without data is 2. If the Y DMRS ports include only one or more DMRS ports {0, 1, 8, 9, 4, 5, 12, 13}, then the number of CDM groups without data is 1 for the Y MRS ports, associated with the first value of the field, or 2, associated with the second value of the field, where Y is an integer. If Y is 2 and the number of consecutive DMRS OFDM symbols is 1, then the Y DMRS ports include one of DMRS ports {8,9} or DMRS ports {10,11}. If Y is 3 and the number of consecutive DMRS OFDM symbols is 1, then the Y DMRS ports include one of the following: DMRS ports {0,8,9}, DMRS ports {2,10,11}, or DMRS ports {8,10,11}, or If Y is 4 and the number of consecutive DMRS OFDM symbols is 1, then the Y DMRS ports include one of the following: DMRS ports {8,9,10,11}, DMRS ports {0,1,8,9}, or DMRS ports {2,3,10,11}. If Y is 2 and the number of consecutive DMRS OFDM symbols is 2, then the Y DMRS ports include one of DMRS ports {8,9}, DMRS ports {10,11}, DMRS ports {12,13}, or DMRS ports {14,15}. If Y is 3 and the number of consecutive DMRS OFDM symbols is 2, then the Y DMRS ports include one of the following: DMRS ports {0,8,9}, DMRS ports {2,10,11}, DMRS ports {8,10,11}, DMRS ports {4,12,13}, DMRS ports {6,14,15}, or DMRS ports {8,9,12}, DMRS ports {10,11,14}. If Y is 4 and the number of consecutive DMRS OFDM symbols is 2, then the Y DMRS ports include one of the following: DMRS ports {8,9,10,11}, DMRS ports {12~15}, DMRS ports {8,9,12,13}, DMRS ports {0,1,8,9}, DMRS ports {2,3,10,11}, DMRS ports {6,7,10,11}, DMRS ports {4,5,12,13}, or DMRS ports {10,11,14,15}, or If Y is 4 and the number of consecutive DMRS OFDM symbols is 2, the first DMRS table includes a first value in the field where the Y DMRS ports are DMRS ports {0, 1, 4, 5} and the number of CDM groups without data is 1, and a second value in the field where the Y DMRS ports are DMRS ports {0, 1, 4, 5} and the number of CDM groups without data is 2. A method of item 26 that satisfies at least one of the following conditions. (Item 29) The multiple categories of the DMRS ports further include DMRS ports of a first category with an FD-OCC length of 2, and the first DMRS table is for physical downlink shared channels (PDSCHs), The aforementioned first DMRS parameters include parameters relating to the length of the FD-OCC of the DMRS ports in the first DMRS port set, The wireless communication device determines the length of the FD-OCC of the DMRS port from the first set of DMRS ports. If the first DMRS parameter includes Y DMRS ports, including one or more DMRS ports from a first DMRS port set, the length of the FD-OCC of one or more DMRS ports from the first DMRS port set depends on the relationship between the Y DMRS ports and the second DMRS port set, or The length of the FD-OCC of a DMRS port in the first DMRS port set is 2 or L. The method described in item 26 or 27, wherein at least one of the following applies. (Item 30) The length of the FD-OCC of one or more DMRS ports from the first DMRS port set depends on the relationship between the Y DMRS ports and the second DMRS port set, If the Y DMRS ports include at least one port from the second DMRS port set, then the length of the FD-OCC of one DMRS port from the first DMRS port set is L, or If the Y DMRS ports include at least one port from the second DMRS port set in one CDM group, then the length of the FD-OCC of one DMRS port from the first DMRS port set is L, and the one CDM group includes the one DMRS port, A method of item 29 that satisfies at least one of the following conditions. (Item 31) In the case of DMRS Type I, the first DMRS port set includes DMRS ports {0-7}, the second DMRS port set includes DMRS ports {8-15}, or In the case of DMRS Type II, the first DMRS port set includes DMRS ports {0-11}, and the second DMRS port set includes DMRS ports {12-23}. The method described in item 29 or 30, which is at least one of the following. (Item 32) The aforementioned wireless communication device has an FD-OCC of length L, and a resource element (k,l) p,μ The sequence of DMRS port p that is mapped to,

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[0073] Various exemplary embodiments of this solution are described in detail below with reference to the following figures or drawings. The drawings are provided for illustrative purposes only and merely illustrate exemplary embodiments of this solution to facilitate the reader's understanding of the solution. Therefore, the drawings should not be considered to limit the scope, extent, or applicability of this solution. Note that these drawings are not necessarily drawn to scale in order to make the illustration clear and easy.

[0074] [Figure 1] Figure 1 shows an exemplary cellular communication network in which the technologies disclosed herein may be implemented, according to embodiments of the present disclosure.

[0075] [Figure 2] Figure 2 shows a block diagram of an exemplary base station and user equipment device according to some embodiments of the present disclosure.

[0076] [Figure 3] Figure 3 shows a DMRS pattern of one OFDM and DMRS type I with a length of 2 in FD-OCC according to some embodiments of the present disclosure.

[0077] [Figure 4] Figure 4 shows a DMRS pattern of one OFDM and DMRS type I with a length of 3 on an FD-OCC according to some embodiments of the present disclosure.

[0078] [Figure 5] Figure 5 shows a DMRS pattern of FD-OCC with two consecutive DMRS OFDM symbols and a length of 2 for DMRS Type I, according to some embodiments of the present disclosure.

[0079] [Figure 6] Figure 6 shows a DMRS pattern of FD-OCC with two consecutive DMRS OFDM symbols and a length of 3 for DMRS Type I, according to some embodiments of the present disclosure.

[0080] [Figure 7] Figure 7 shows a DMRS pattern of FD-OCC with one DMRS OFDM symbol and a length of 6 for DMRS Type I according to some embodiments of the present disclosure.

[0081] [Figure 8] Figure 8 shows a DMRS pattern of FD-OCC with two consecutive DMRS OFDM symbols and a length of 6 for DMRS Type I, according to some embodiments of the present disclosure.

[0082] [Figure 9] Figure 9 shows a DMRS pattern of FD-OCC with one DMRS OFDM symbol and a length of 4 for DMRS Type I, according to some embodiments of the present disclosure.

[0083] [Figure 10] Figure 10 shows a DMRS pattern of FD-OCC with two consecutive DMRS OFDM symbols and a length of 4 for DMRS Type I, according to some embodiments of the present disclosure.

[0084] [Figure 11] Figure 11 shows a DMRS pattern of FD-OCC with one DMRS OFDM symbol and a length of 2 for DMRS Type II according to some embodiments of the present disclosure.

[0085] [Figure 12] Figure 12 shows a DMRS pattern of FD-OCC with one DMRS OFDM symbol and a length of 4 for DMRS Type II according to some embodiments of the present disclosure.

[0086] [Figure 13]Figure 13 shows a DMRS pattern of FD-OCC with two consecutive DMRS OFDM symbols and DMRS Type II with a length of 2, according to some embodiments of the present disclosure.

[0087] [Figure 14] Figure 14 shows a DMRS pattern of FD-OCC with two consecutive DMRS OFDM symbols and a length of 4 for DMRS Type II, according to some embodiments of the present disclosure.

[0088] [Figure 15] Figure 15 shows a flowchart of an exemplary method for communicating in accordance with DMRS port directives based on a DMRS table, according to an embodiment of the present disclosure. [Modes for carrying out the invention]

[0089] Detailed explanation 1. Mobile communication technologies and environment Figure 1 shows an exemplary wireless communication network and / or system 100 in which the technology disclosed herein may be implemented, according to embodiments of the present disclosure. In the following description, the wireless communication network 100 may be any wireless network, such as a cellular network or a narrowband Internet of Things (NB-IoT) network, and is referred to herein as “Network 100”. Such exemplary Network 100 includes base stations 102 (hereinafter “BS102”; also called wireless communication nodes) and user equipment devices 104 (hereinafter “UE104”; also called wireless communication devices) that can communicate with each other via communication links 110 (e.g., wireless communication channels), and clusters of cells 126, 130, 132, 134, 136, 138, and 140 overlapping geographical area 101. In Figure 1, BS102 and UE104 are contained within the respective geographical boundaries of cell 126. Each of the other cells 130, 132, 134, 136, 138, and 140 may include at least one base station operating within its allocated bandwidth to provide adequate radio coverage to the intended users.

[0090] For example, BS102 may operate within an allocated channel transmission bandwidth to provide UE104 with an appropriate effective communication range. BS102 and UE104 may communicate via downlink radio frames 118 and uplink radio frames 124, respectively. Each radio frame 118 / 124 may be further divided into subframes 120 / 127, which may contain data symbols 122 / 128. In this disclosure, BS102 and UE104 are described herein as non-limiting examples of “communication nodes” that can generally implement the methods disclosed herein. Such communication nodes may be capable of performing wireless and / or wired communication according to various embodiments of this solution.

[0091] Figure 2 shows a block diagram of an exemplary wireless communication system 200 for transmitting and receiving wireless communication signals (e.g., OFDM / OFDMA signals) according to some embodiments of the present solution. The system 200 may include components and elements configured to support known or conventional operating features that do not need to be described in detail herein. In one exemplary embodiment, the system 200 can be used to communicate (e.g., transmit and receive) data symbols in a wireless communication environment such as the wireless communication environment 100 in Figure 1, as described above.

[0092] System 200 generally includes a base station 202 (hereinafter, "BS202") and a user equipment device 204 (hereinafter, "UE204"). BS202 includes a BS (base station) transceiver module 210, a BS antenna 212, a BS processor module 214, a BS memory module 216, and a network communication module 218, each module being coupled and interconnected to one another as needed via a data communication bus 220. UE204 includes a UE (user equipment) transceiver module 230, a UE antenna 232, a UE memory module 234, and a UE processor module 236, each module being coupled and interconnected to one another as needed via a data communication bus 240. BS202 communicates with UE204 via a communication link 250, the communication channel can be any radio channel or other medium suitable for data transmission as described herein.

[0093] As will be understood by those skilled in the art, System 200 may further include any number of modules other than those shown in Figure 2. Those skilled in the art will understand that various exemplary blocks, modules, circuits, and processing logic described in relation to the embodiments disclosed herein can be implemented in hardware, computer-readable software, firmware, or any practical combination thereof. To clearly demonstrate this compatibility and compatibility of hardware, firmware, and software, various exemplary components, blocks, modules, circuits, and steps are generally described in relation to their function. Whether such function is implemented as hardware, firmware, or software may depend on the specific application and the design constraints imposed on the overall system. Those familiar with the concepts described herein may implement such function in a manner suitable for each specific application, but such implementation decisions should not be construed as limiting the scope of this disclosure.

[0094] According to some embodiments, the UE transceiver 230 may be referred herein as an “uplink” transceiver 230, which includes a radio frequency (RF) transmitter and an RF receiver, each having a circuit coupled to the antenna 232. Alternatively, a duplex switch (not shown) may couple the uplink transmitter or receiver to the uplink antenna in a time-duplex manner. Similarly, according to some embodiments, the BS transceiver 210 may be referred herein as a “downlink” transceiver 210, which includes an RF transmitter and an RF receiver, each having a circuit coupled to the antenna 212. Alternatively, a downlink duplex switch may couple the downlink transmitter or receiver to the downlink antenna 212 in a time-duplex manner. The operation of the two transceiver modules 210 and 230 may be time-coordinated so that the downlink transmitter is coupled to the downlink antenna 212 and at the same time that the uplink receiving circuit is coupled to the uplink antenna 232 to receive transmissions over the radio transmission link 250. Conversely, the operation of the two transceivers 210 and 230 can be time-coordinated so that the uplink transmitter is coupled to the uplink antenna 232 at the same time that the downlink receiver is coupled to the downlink antenna 212 to receive transmissions over the radio transmission link 250. In some embodiments, there is close-time synchronization with a minimum guard time between changes in duplex direction.

[0095] The UE transceiver 230 and base station transceiver 210 are configured to communicate via a radio data communication link 250 and to cooperate with appropriately configured RF antenna equipment 212 / 232 capable of supporting specific radio communication protocols and modulation schemes. In some exemplary embodiments, the UE transceiver 230 and base station transceiver 210 are configured to support industry standards such as Long-Term Evolution (LTE) and emerging 5G standards. However, it should be understood that this disclosure is not necessarily limited to application to specific standards and associated protocols. Rather, the UE transceiver 230 and base station transceiver 210 may be configured to support alternative or additional radio data communication protocols, including future standards or variations thereof.

[0096] According to various embodiments, BS202 may be, for example, an evolved node B (eNB), a service-providing eNB, a target eNB, a femtostation, or a picostation. In some embodiments, UE204 may be embodied in various types of user devices such as mobile phones, smartphones, personal digital assistants (PDAs), tablets, laptop computers, and wearable computing devices. Processor modules 214 and 236 may be implemented or realized using general-purpose processors, content-addressable memory, digital signal processors, application-specific integrated circuits, field-programmable gate arrays, any suitable programmable logic devices, discrete gates or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. Thus, the processor may be realized as a microprocessor, controller, microcontroller, state machine, etc. The processor may also be implemented as a combination of computing devices, for example, a combination of a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other such configuration.

[0097] Furthermore, steps of methods or algorithms described in relation to embodiments disclosed herein can be directly embodied in hardware, firmware, software modules executed by processor modules 214 and 236, respectively, or any practical combination thereof. Memory modules 216 and 234 can be implemented as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the art. In this regard, memory modules 216 and 234 can be coupled to processor modules 214 and 236, respectively, so that processor modules 214 and 236 can read information from and write information to memory modules 216 and 234, respectively. Memory modules 216 and 234 may also be integrated into processor modules 214 and 236, respectively. In some embodiments, memory modules 216 and 234 may each include cache memory for storing temporary variables or other intermediate information during the execution of instructions executed by processor modules 214 and 236, respectively. Memory modules 216 and 234 may also include non-volatile memory for storing instructions executed by processor modules 214 and 236, respectively.

[0098] The network communication module 218 generally represents hardware, software, firmware, processing logic, and / or other components of the base station 202 that enable bidirectional communication between the base station transceiver 210 and other network components and communication nodes configured to communicate with the base station 202. For example, the network communication module 218 may be configured to support Internet or WiMAX traffic. In a typical configuration, but not limited to, the network communication module 218 provides an 802.3 Ethernet® interface so that the base station transceiver 210 can communicate with a conventional Ethernet®-based computer network. In this way, the network communication module 218 may include a physical interface for connecting to a computer network (e.g., a mobile switching center (MSC)). As used herein with respect to a specified operation or function, the terms “configured for,” “configured to,” and their inflections refer to a device, component, circuit, structure, machine, signal, etc., that is physically configured, programmed, formatted, and / or arranged to perform a specified operation or function.

[0099] The Open System Interconnection (OSI) model (hereinafter referred to as the “Open System Interconnection Model”) is a conceptual and logical layout that defines network communications used by systems (e.g., wireless communication devices, wireless communication nodes) that are open to interconnection and communication with other systems. The model is divided into seven subcomponents or layers, each representing a conceptual set of services provided to the layers above and below it. The OSI model also defines logical networks and effectively describes computer packet forwarding by using different layer protocols. The OSI model is sometimes referred to as the 7-layer OSI model or 7-layer model. In some embodiments, the first layer may be the physical layer. In some embodiments, the second layer may be the medium access control (MAC) layer. In some embodiments, the third layer may be the radio link control (RLC) layer. In some embodiments, the fourth layer may be the packet data convergence protocol (PDCP) layer. In some embodiments, the fifth layer may be the radio resource control (RRC) layer. In some embodiments, the sixth layer may be the Non-Accessible Service (NAS) layer or the Internet Protocol (IP) layer, and the seventh layer may be any other layer.

[0100] To enable those skilled in the art to fabricate and use the present solution, various exemplary embodiments of the solution are described below with reference to the accompanying drawings. As will be apparent to those skilled in the art, after reading this disclosure, various modifications or changes to the examples described herein can be made without departing from the scope of the solution. Therefore, the solution is not limited to the exemplary embodiments and uses described and illustrated herein. Furthermore, the particular order or hierarchy of steps in the methods disclosed herein is merely illustrative. Based on design preferences, the particular order or hierarchy of steps in the disclosed methods or processes can be rearranged while remaining within the scope of the solution. Therefore, those skilled in the art will understand that the methods and techniques disclosed herein present various steps or operations in a sample order, and the solution is not limited to the specific order or hierarchy presented unless otherwise specified. 2. Systems and methods for designating and / or determining DMRS ports

[0101] More orthogonal DMRS ports can enable more layers of MIMO transmission. Increasing the spectral efficiency of communications is crucial. How to increase the number of orthogonal DMRS ports is one problem addressed by the methods and systems described herein. In certain systems (e.g., 5G New Radio (NR), Next Generation (NG) systems, 3GPP® systems, and / or other systems), radio communication devices (e.g., UEs) and radio communication nodes (e.g., base stations) can communicate with each other according to DMRS parameters. In some embodiments, the radio communication device determines a first demodulated reference signal (DMRS) table. In some embodiments, the radio communication device receives field values ​​in a signaling from a radio communication node. The signaling can be downlink control information (DCI) signaling, radio access control (RRC) signaling, or medium access control / control element (MAC-CE) signaling. In some embodiments, the radio communication device determines first DMRS parameters according to the first DMRS table and field values. The first DMRS table may contain a mapping between the values ​​of the signaling fields and the values ​​of the first DMRS parameters. The first DMRS table may contain the first DMRS parameters for multiple categories of DMRS ports. Each of the multiple categories of DMRS ports may correspond to one of multiple second parameters.

[0102] In one embodiment, indicating DMRS ports based on the DMRS table disclosed herein can support a larger number of DMRS ports. In one embodiment, the DMRS table includes DMRS parameters for more categories than one of the DMRS ports. Each of the more categories than one of the DMRS ports corresponds to its respective second parameter. Furthermore, a single DMRS table may include more categories than one of the DMRS ports to increase scheduling flexibility. The gNB can dynamically switch between different categories of DMRS ports and schedule older and newer UEs on demand. The index of DMRS ports can be shared with different categories of DMRS ports to reduce signaling overhead while supporting or allowing scheduling flexibility. Some parameters may be considered to obtain DMRS ports for concurrently scheduled UEs. Thus, a UE can obtain more estimates of interference from concurrently scheduled UEs while enabling more DMRS ports. By enabling a larger number of DMRS ports, a radio communication node can communicate with a larger number of radio communication devices, enabling more layers of MIMO transmission, thereby improving the spectral efficiency of the communication. Example 1: In the case of UL DMRS transmission, the maximum length of the FD-OCC is 3.

[0103] The UE may determine that the frequency domain OCC (FD-OCC) length of an uplink DMRS port belongs to {2,3}. The DCI may notify / instruct which FD-OCC to adopt for a given uplink DMRS port. The UE may adopt the determined FD-OCC length and transmit DMRS in PUSCH or PUCCH.

[0104] The frequency-domain pattern of a DMRS can be configured by the DMRS type. The time-domain pattern of a DMRS can be configured by the maximum number of consecutive OFDM symbols and additional DMRS locations, as shown in Tables 2-1 to 2-3. The following example dynamically implements switching between FD-OCC of length 2 and FD-OCC of length 3, relating to different FD pattern configurations and time-domain pattern configurations. The maximum number of consecutive OFDM symbols is configured by the parameter max-length. One DMRS table contains DMRS ports for FD-OCC of length 2 and FD-OCC of length 3. The DMRS table contains a mapping between signaling values ​​and values ​​of a first parameter. Example 1-1: Maximum number of consecutive OFDM symbols of DMRS type I and value 1

[0105] Figure 3 shows a DMRS pattern of FD-OCCs with a length of 2 in one OFDM. Figure 4 shows a DMRS pattern of FD-OCCs with a length of 3 in one OFDM. One DMRS port may occupy each resource element (RE) of its corresponding CDM group. One FD-OCC may correspond to one CDM unit that can correspond to one set of CDM groups. One FD-OCC may correspond to one RE of one CDM group within one CDM unit. An element of one FD-OCC in sequence may correspond to one RE of one CDM group within one CDM unit. The length of one FD-OCC may be equal to the number of REs of one CDM group within one CDM unit.

[0106] As shown in Figure 3, one PRB may contain three CDM units of length 2 FD-OCC in one OFDM symbol for each CDM group. Each CDM unit in one CDM group may contain two REs, each of which may correspond to one element of a length 2 FD-OCC.

[0107] As shown in Figure 4, one PRB can contain two CDM units of length 3 FD-OCC in one OFDM symbol for each CDM group. Each CDM unit in one CDM group may contain three REs, each of which may correspond to one element of one FD-OCC of length 3.

[0108] If an FD-OCC of length 2 is used, the UE may obtain a sequence of DMRS ports according to the following equation (1): [ka] During the ceremony, w f (k', w t (l'), and Δ are given by Table 1. k is the index of the subcarrier. The reference point for k is subcarrier 0 in common resource block 0. l is the OFDM symbol of DMRS, [ka] is the first symbol of each of X consecutive OFDM symbols. [ka] As shown in Tables 2-1 to 2-3, the upper layer configuration of l0, mapping type, and PUSCH duration l d This can be based on X and whether intra-slot hopping is enabled. l0 is the first DM-RS symbol of the DMRS. r(m) is the symbol with index m in the symbol sequence generated by the pseudo-random sequence generation function or the low PAPR sequence generation function. p is the DMRS port indicated by the signaling, based on the order indicated in the signaling, and the signaling includes one of DCI signaling, RRC signaling, or MAC-CE signaling. μ is a parameter relating to the subcarrier spacing, for example, the subcarrier spacing of the DMRS is 2 μ *This is 15kHz.

[0109] The reference point l and position l0 for the first DM-RS symbol may depend on the mapping type. For PUSCH mapping type A, l may be set, defined, or determined for the start of a slot if frequency hopping is disabled, and for the start of each hop if frequency hopping is enabled, and l0 may be set, specified, or determined by the higher-level parameter dmrs-TypeA-Position. For PUSCH mapping type B, l is defined for the start of a scheduled PUSCH resource if frequency hopping is disabled, and for the start of each hop if frequency hopping is enabled, and l0=0.

[0110] The location of the DM-RS symbol is, [ka] and duration l d It may be set, specified, or determined by l d This may be the duration between the first OFDM symbol in the slot and the last OFDM symbol of the scheduled PUSCH resource in the slot for PUSCH mapping type A, relating to Tables 3 and 4, if intra-slot frequency hopping is not used. d This could be the duration of the scheduled PUSCH resource for PUSCH mapping type B, relating to Tables 3 and 4, if intra-slot frequency hopping is not used. Or, l d This could be the duration per hop, which falls under Table 6 when in-slot frequency hopping is used. [Table 1] [Table 2-1] [Table 2-2] [Table 2-3]

[0111] Table 2-1 may be used when X is 1 and intra-slot hopping is disabled. Table 2-2 may be used when X is 2 and intra-slot hopping is disabled. Table 2-3 may be used when X is 1 and intra-slot hopping is enabled. X can be the number of consecutive DMRS OFDM symbols.

[0112] Tables 2-1 to 2-3 may be applied to the following Examples 1-1 to 3-4, and the time-domain OFDM position [ka] This can be obtained based on Tables 2-1 to 2-3 in Examples 1-1 to 3-4 below.

[0113] If a length 3 FD-OCC is used, the UE may assume a sequence of DMRS ports according to equation (2) below. [ka] During the ceremony, w f (k', w t (l') and Δ are given by Table 3. l is based on Table 2. In this construction of the largest number of consecutive DMRS OFDM symbols with a value of 1, w for l'=1 in Table 3 t (l') can be ignored. The maximum number of consecutive DMRS OFDM symbols can be set, determined, or configured by the max-length parameter. Then, in this configuration, w t Since (l') can have only one element corresponding to l'=0, it can include DMRS ports {0,1,2,3,8,9,10,11}. DMRS ports distinguished by TD-OCC can be enabled in configurations with DMRS type 1 and max-length 2. [Table 3]

[0114] Alternatively, equations (1) and (2) can be combined into the following equation: [ka] In the formula, L can be the length of FD-OCC. For example, if the length of FD-OCC is 2, then L can be 2. If the length of FD-OCC is 3, then L can be 3. In Table 3, one w t There are two DMRS ports corresponding to (l'). One w for length L of FD-OCC t There can be L DMRS ports corresponding to (l'), but w f DMRS port of FD-OCC of length 2 having (k')=[1,1] and w fA DMRS port with a length 3 FD-OCC having (k')=[1,1,1] may share the same DMRS port number to reduce the overhead of instructions in DCI. UEs may not distinguish between two DMRS ports because their sequences are the same. A gNB can distinguish them based on the DMRS port of the MU UE. For example, if a gNB schedules UE1 with DMRS port 0 and UE2 with DMRS port {8,9}, and UE1 and UE2 are MU UEs, the gNB may take the channel for DMRS port 0 with a length 3 FD-OCC. If a gNB schedules UE1 with DMRS port 0 and UE2 with DMRS port 1, and UE1 and UE2 are MU UEs, the gNB should take the channel for DMRS port 0 with a length 2 FD-OCC. The length of the FD-OCC for DMRS port 0 may be determined by the gNB, and the UE may not need to know it. Similarly, for DMRS ports 0, 2, 4, and 6, FD-OCCs of length 2 and FD-OCCs of length 3 may share the same DMRS port number. The actual length of the FD-OCCs for DMRS ports {0,2,4,6} may be determined by the gNB, and the UE may not need to know the actual FD-OCCs.

[0115] If the rank indicated in the DCI is 1, the gNB can inform the UE which FD-OCC length should be used to transmit uplink DMRS using Table 4-1 or Table 4-2 below. That is, if the rank indicated in the DCI is 1, the gNB informs the DCI of the DMRS ports corresponding to FD-OCCs of length 2 and FD-OCCs of length 3 according to Table 4-1 or Table 4-2. The DMRS ports corresponding to FD-OCCs of length 2 and FD-OCCs of length 3 may be indexed together and included in a single table, and the gNB can dynamically switch between the DMRS ports for FD-OCCs of length 2 and FD-OCCs of length 3. This allows a new UE to be scheduled as an MU (Multiple UE) UE with an old UE or the new UE. The new UE may have Rel-18 DMRS extensions / capabilities. The old UE may not have Rel-18 DMRS extensions / capabilities. For example, if a gNB attempts to schedule one old UE and one new UE within a CDM group as MU UEs, the gNB can schedule the new UE with a DMRS port corresponding to an FD-OCC of length 2. If a gNB attempts to schedule three new UEs within a CDM group as MU UEs, the gNB can schedule three new UEs with DMRS ports corresponding to an FD-OCC of length 3.

[0116] In some implementations, the rank value is determined according to the SRS resource indicator field when a non-codebook scheme is configured, and according to the precoding information field and layer number when a codebook scheme is configured. [Table 4-1] [Table 4-2]

[0117] If the rank indicated in the DCI is 2, the gNB can use Table 5-1 or Table 5-2 below to inform the UE which FD-OCC length should be used to transmit the uplink DMRS. [Table 5-1] [Table 5-2]

[0118] If the rank indicated in the DCI is 3, the gNB can use Table 6-1 or Table 6-2 below to inform the UE which FD-OCC length should be used to transmit the uplink DMRS. [Table 6-1] [Table 6-2]

[0119] If the rank indicated in the DCI is 4, the gNB can use Table 7-1 or Table 7-2 below to inform the UE which FD-OCC length should be used to transmit the uplink DMRS. [Table 7]

[0120] The number of CDM groups without data for values ​​1 and 2 in Tables 4-1 to 7 may refer to CDM groups {0} and {0,1}, respectively, where CDM groups 0,1 are shown in Figures 3, 4, Table 1, and Table 3.

[0121] Tables 4-1 through 7 can be enabled by configuring a second DMRS parameter. For the same rank, only one table may be enabled; for example, only table 4-1 or table 4-2 may be enabled. The number of bits in a field can be determined by the second DMRS parameter, the DMRS type, and the maximum number of consecutive DMRS OFDM symbols. The number of bits in the fields of tables 4-1 through 7 may be the same; they have 4 bits. Alternatively, table 4-1 or table 4-2 may be enabled by the second DMRS parameter. Tables 5-1 through 7 can reuse the old tables from Rel-15 through Rel-17. Some new entries may be added to the old tables of older Rels such as Rel-15 through Rel-17. The number of bits in a field can be determined by the second DMRS parameter, the rank, the DMRS type, and the maximum number of consecutive DMRS OFDM symbols. The number of bits in the fields of table 4-1 or table 4-2 may be 4. The number of bits in the fields of table 5-1 or table 5-2 may be 3.

[0122] A DMRS port that supports FD-OCCs of length 3 may not be scheduled for older UEs that cannot recognize a DMRS port that supports FD-OCCs of length 3. Example 1-2: For DMRS Type I with a value of 2 and the maximum number of consecutive OFDM symbols

[0123] Figure 5 shows the DMRS pattern of a 2-length FD-OCC in two consecutive OFDMs. Figure 6 shows the DMRS pattern of a 3-length FD-OCC in two consecutive OFDMs. Two consecutive OFDMs can correspond to one TD-OCC unit. Each element of a 2-length TD-OCC can correspond to one OFDM within two consecutive OFDMs.

[0124] If a length 2 FD-OCC is used, the UE may assume a sequence of DMRS ports according to equation (4) below. [ka]

[0125] If a length 3 FD-OCC is used, the UE may assume a sequence of DMRS ports according to equation (5) below. [ka]

[0126] Equations (1) through (5) can be combined as shown in equation (6): [ka] X can be the number of consecutive DMRS OFDM symbols. If max-length is determined / configured to be 1, then X can be equal to 1 and l'=0. If max-length is determined / configured to be 2 and a single symbol is represented by DCI, then X can be equal to 1 and l'=0. If max-length is determined / configured to be 2 and a double symbol is represented by DCI, then X can be equal to 2 and l'=0,1.

[0127] DCI can indicate whether the number of consecutive symbols is 1 or 2, depending on the number of front-load symbols, as shown in Tables 8 through 10. DCI can also indicate which FD-OCC length is used by the UE to transmit the uplink DMRS.

[0128] If the rank indicated in the DCI is 1, the gNB can inform the UE of which FD-OCC lengths may be used to transmit the uplink DMRS, according to Table 8 below. [Table 8]

[0129] If the rank indicated in DCI is 2, the gNB can use Table 9 below to inform the UE which FD-OCC length should be used to transmit the uplink DMRS. [Table 9]

[0130] If the rank indicated in DCI is 3, the gNB can use Table 10 below to inform the UE which FD-OCC length should be used to transmit the uplink DMRS. [Table 10]

[0131] If the rank indicated in the DCI is 4, the gNB can use Table 11 or Table 12 below to inform the UE which FD-OCC length should be used to transmit the uplink DMRS. [Table 11]

[0132] Tables 4 through 12 can be enabled by a second DMRS parameter. The number of bits in a field can be determined by the second DMRS parameter, the DMRS type, and the maximum number of consecutive DMRS OFDM symbols. The number of bits in the values ​​in Tables 4 through 11 may be the same, or they may be 5 bits.

[0133] Alternatively, tables 8 and 9 may be new tables, enabled by a second DMRS parameter. Tables 10 and 11 may be older tables with several new entries, including DMRS ports corresponding to FD-OCCs of length 3. The number of bits in a field may be determined by a second DMRS parameter, the DMRS type, the maximum number of consecutive DMRS OFDM symbols, and the rank. The number of bits in the values ​​from tables 4 through 11 may be the same, or they may be 5 bits.

[0134] Alternatively, tables 8 through 12 may be enabled, but these tables may have different bit counts. The bit count may depend on the rank.

[0135] In some embodiments, a DMRS port corresponding to a length 3 FD-OCC may only be shown for new UEs with Rel-18 DMRS extension / capabilities. [Table 12]

[0136] The values ​​in the first column of Tables 4 through 12 may correspond to the values ​​in the antenna bit field shown in DCI.

[0137] The number of CDM groups without data for values ​​1, 2, and 3 in Tables 8 through 12 may refer to CDM groups {0} and {0,1}, respectively, and CDM groups 0,1 are shown in Figures 5, 6, Table 1, and Table 3. Example 2: UL DMRS case where the maximum length of FD-OCC is 6

[0138] The UE may determine that the length of the frequency domain (FD)-OCC of an uplink DMRS port may fall within {2,6}. The DCI may inform the UE which FD-OCC should be adopted for a given uplink DMRS port. The UE may adopt the determined FD-OCC length and transmit DMRS in PUSCH or PUCCH.

[0139] The frequency pattern of a DMRS can be configured by the type of DMRS. The time-domain pattern of a DMRS can be configured by the maximum number of consecutive OFDM symbols and additional DMRS positions, as shown in Tables 2-1, 2-2, or 2-3. The following example of dynamic switching between FD-OCC of length 2 and FD-OCC of length 6 may be for different FD pattern configurations and time-domain pattern configurations. The maximum number of consecutive OFDM symbols can be configured by the parameter max-length. Example 2-1: DMRS Type I with a value of 1 and the maximum number of consecutive OFDM symbols

[0140] A DMRS pattern of FD-OCCs of length 2 in one OFDM may be shown in Figure 3. A DMRS pattern of FD-OCCs of length 6 in one OFDM may be shown in Figure 7. One DMRS port may occupy each resource element (RE) of its corresponding CDM group. One FD-OCC may correspond to one CDM unit. One FD-OCC may correspond to an RE of one CDM group within one CDM unit. In order, each element of one FD-OCC corresponds to an RE of one CDM group in one CDM unit.

[0141] The length of one FD-OCC may be equal to the number of REs in one CDM group within one CDM unit. The number of REs in one CDM unit may be equal to the number of CDM groups in one CDM unit multiplied by the length of the FD-OCC. As shown in Figure 7, the number of REs in one CDM unit could be 6 * 2 = 12.

[0142] As shown in Figure 7, one PRB may contain one CDM unit of a length 6 FD-OCC in one OFDM symbol for each CDM group. Each CDM unit in a CDM group may contain six REs, each of which may correspond to one element of a length 3 FD-OCC.

[0143] If a length 2 FD-OCC is used, the UE may assume a sequence of DMRS ports according to equation (1) and Table 1.

[0144] If a length 6 FD-OCC is used, the UE may assume a sequence of DMRS ports according to equation (7). [ka] During the ceremony, w f (k', w t (l'), and Δ can be obtained by Table 13. l can be obtained based on one of Tables 2-1, 2-2, or 2-3. In this configuration of the maximum number of consecutive OFDM symbols with a value of 1, w for l'=1 in Table 13 t (l') can be ignored. Next, in this configuration, w t (l') can have only one element corresponding to l'=0, thus including DMRS ports {0,1,2,3,8,9,10,11}. DMRS ports distinguished by TD-OCC may be enabled in the case of max-length configurations equal to DMRS types 1 and 2. [Table 13]

[0145] Alternatively, equations (1) and (7) can be combined into the following equation (8): [ka] In the formula, L can be the length of FD-OCC. For example, if the length of FD-OCC is 2, L can be 2, and if the length of FD-OCC is 6, L can be 6. In Table 13, one w t There are two DMRS ports corresponding to (l'). One w for length L of FD-OCC t There are L DMRS ports corresponding to (l'), but in order to reduce the overhead of instructions in DCI, w f DMRS port of FD-OCC of length 2 having (k')=[1,1] and w f A DMRS port of an FD-OCC of length 6 having (k')=[1,1,1,1,1,1] can share the same DMRS port number, w f DMRS port of FD-OCC of length 2 with (k')=[1,-1] and w f A DMRS port of length 6 with (k')=[1,-1,1,-1,1,-1] can share the same DMRS port number. For example, four w from six orthogonal FD-OCCs of length 6 f(k') may be selected or chosen. The UE may not distinguish between two DMRS ports that share the same DMRS port number because their sequences are the same. The gNB may distinguish them based on the DMRS ports of the MU UE. For example, if the gNB schedules UE1 with DMRS ports {0,1} and UE2 with DMRS ports {8,9} and UE1 and UE2 are MU UEs, the gNB may obtain a channel for DMRS port {0,1} with an FD-OCC of length 6. If the gNB schedules UE1 with DMRS port 0 and UE2 with DMRS port 1 and UE1 and UE2 are MU UEs, the gNB may obtain a channel for DMRS port 0 with an FD-OCC of length 2. The length of the FD-OCC for DMRS port 0 may be determined by the gNB and the UE does not need to know it. A similar embodiment can be applied to DMRS ports {1-7}. For example, for DMRS ports 0-7, an FD-OCC of length 2 and an FD-OCC of length 6 may share the same DMRS port number (number of DMRS ports). The actual lengths of the FD-OCCs for DMRS ports {0,1,2,3,4,5,6,7} may be determined by the gNB and may not be known by the UE.

[0146] If the rank indicated in the DCI is 1, the gNB can use Table 14-1 or 14-2 below to inform the UE which FD-OCC length should be used to transmit uplink DMRS. DMRS ports corresponding to FD-OCCs of length 2 and DMRS ports corresponding to FD-OCCs of length 6 may be indexed together or included in a single table, and the gNB can dynamically switch between DMRS ports for FD-OCCs of length 2 and FD-OCCs of length 6. This allows a new UE to be scheduled as a multi-UE (MU) with an old UE or the new UE. The new UE may have or be compatible with Rel-18 DMRS extensions. The old UE may not have or support Rel-18 DMRS extensions. For example, if the gNB attempts or intends to schedule one old UE and one new UE as a MU within a single CDM group, the gNB can schedule the new UE with a DMRS port corresponding to an FD-OCC of length 2. If a gNB attempts to schedule four new UEs as MUs within a single CDM group, or attempts to schedule them, the gNB can schedule the new UEs with DMRS ports corresponding to FD-OCCs of length 6. For example, each of the four new UEs can be scheduled by one of the DMRS ports {0,1,8,9}.

[0147] In some implementations, the rank value may be determined according to the SRS resource indicator field if a non-codebook scheme is configured, and according to the precoding information field and layer number if a codebook scheme is configured. [Table 14-1] [Table 14-2]

[0148] If the rank indicated in DCI is 2, the gNB can use Table 15 below to inform the UE which FD-OCC length should be used to transmit the uplink DMRS. [Table 15]

[0149] If the rank indicated in DCI is 3, the gNB can use Table 16 below to inform the UE which FD-OCC length should be used to transmit the uplink DMRS. [Table 16]

[0150] If the rank indicated in DCI is 4, the gNB can use Table 17 below to inform the UE which FD-OCC length should be used to transmit the uplink DMRS. [Table 17]

[0151] The number of CDM groups without data for values ​​1, 2, and 3 in Tables 14 through 17 may refer to CDM groups {0}, {0,1}, and {0,1,2}, respectively, where CDM groups 0,1 are shown in Figures 3, 7, Table 1, and Table 13.

[0152] Tables 14-1 through 17 may be enabled by a second DMRS parameter. Alternatively, table 14-1 or table 14-2 may be enabled by a second DMRS parameter. Tables 15 through 17 can reuse the old tables from Rel-15. Some new entries may be added to the old tables of older Rels, such as Rel-15 through Rel-17. DMRS ports corresponding to FD-OCCs of length 6 may not be scheduled for older UEs that may not recognize DMRS ports corresponding to FD-OCCs of length 6. Example 2-2: For DMRS Type I with a value of 2 and the maximum number of consecutive OFDM symbols

[0153] Figure 5 shows the DMRS pattern of a 2-length FD-OCC in two consecutive OFDMs, and Figure 8 shows the DMRS pattern of a 6-length FD-OCC in two consecutive OFDMs. Two consecutive OFDMs correspond to one TD-OCC unit. Each element of the 2-length TD-OCC corresponds to one OFDM within the two consecutive OFDMs.

[0154] If a length 2 FD-OCC is used, the UE may assume a sequence of DMRS ports according to equation (4) and Table 1 below.

[0155] If an FD-OCC of length 6 is used, the UE may assume a sequence of DMRS ports corresponding to the length of the FD-OCC according to equation (9) below. [ka]

[0156] Equations (1), (7), (8), and (9) can be combined with the following equation (10). [ka] Here, X is the number of consecutive OFDM symbols for DMRS. If max-length is determined (or configured) to be 1, then X is equal to 1 and l'=0. If max-length is determined (or configured) to be 2 and a single symbol is indicated by DCI, then X is equal to 1 and l'=0. If max-length is determined / configured to be 2 and a double symbol is indicated by DCI, then X is equal to 2 and l'=0,1.

[0157] The DCI may indicate whether the number of consecutive symbols is 1 or 2, depending on the number of front-load symbols, as shown in Tables 18 to 21. The DCI may indicate which FD-OCC length is used by the UE to transmit uplink DMRS. The DCI may indicate which DMRS port corresponds to the FD-OCC of length 2 and the FD-OCC of length 6.

[0158] If the rank indicated in the DCI is 1, the gNB can inform the UE which FD-OCC length should be used to transmit the uplink DMRS according to Table 8 below. [Table 18]

[0159] If the rank indicated in the DCI is 2, the gNB can use Table 19 below to inform the UE which FD-OCC length should be used to transmit the uplink DMRS. [Table 19]

[0160] If the rank indicated in DCI is 3, the gNB can use Table 20 below to inform the UE which FD-OCC length should be used to transmit the uplink DMRS. [Table 20]

[0161] If the rank indicated in the DCI is 4, the gNB can use Table 21 or Table 22 below to inform the UE which FD-OCC length should be used to transmit the uplink DMRS. [Table 21]

[0162] Tables 18 through 21 may be enabled by a second DMRS parameter. Alternatively, tables 18 and 19 may be new tables, which may also be enabled by a second DMRS parameter. Tables 20 and 21 may be older tables with some new entries, including DMRS ports corresponding to FD-OCCs of length 6. DMRS ports corresponding to FD-OCCs of length 6 may only be shown to new UEs with Rel-18 DMRS extensions / capabilities. [Table 22]

[0163] Furthermore, DMRS ports 8 through 15 corresponding to FD-OCCs of length 3 shown in Table 3 and DMRS ports 8 through 15 corresponding to FD-OCCs of length 6 shown in Table 13 are shared in the same order, although the tables shown in Tables 4-1 through 4-12 and Table 14-22 may be different. For example, DMRS8, which is an FD-OCC of length 6, may be two repeating FD-OCCs of length 3. This is because, when a single symbol is used, there may be three CDM orthogonal DMRS ports in one CDM group for an FD-OCC of length 3 such as DMRS port {0,8,9}, but there may be four CDM orthogonal DMRS ports in one CDM group for an FD-OCC of length 6 such as DMRS port {0,1,8,9}. In one embodiment, DMRS port 1 is shared between FD-OCCs of length 2 and length 6, but is not used for FD-OCCs of length 3.

[0164] The number of CDM groups without data for values ​​1 and 2 in Tables 18 through 22 can refer to CDM groups {0} and {0,1}, respectively, and CDM groups 0 and 1 are shown in Figures 3, 8, Table 1, and Table 8. Example 3: UL DMRS case where the maximum length of FD-OCC is 4

[0165] The UE may determine that the length of the FD-OCC for an uplink DMRS port belongs to {2,4}. The DCI may inform the UE which FD-OCC should be adopted for a given uplink DMRS port. The UE may adopt the determined FD-OCC length and transmit the DMRS for PUSCH, or transmit the DMRS for PUSCH.

[0166] The frequency pattern of a DMRS can be configured by the type of DMRS. The time-domain pattern of a DMRS can be configured by the maximum number of consecutive OFDM symbols and additional DMRS positions, as shown in Table 2. The following example of dynamic switching between FD-OCC of length 2 and FD-OCCL of length 4 may be for different FD pattern configurations and time-domain pattern configurations. The maximum number of consecutive OFDM symbols can be configured by the parameter max-length. Example 3-1:

[0167] For DMRS type I with a value of 1 and the maximum number of consecutive OFDM symbols, a DMRS pattern of FD-OCCs of length 2 in one OFDM may be shown in Figure 3. A DMRS pattern of FD-OCCs of length 4 in one OFDM is shown in Figure 9. One DMRS port may occupy each RE (resource element) of its corresponding CDM group. One FD-OCC may correspond to one CDM unit. One FD-OCC may correspond to an RE of one CDM group within one CDM unit. The elements of one FD-OCC in a sequence correspond to an RE of one CDM group within one CDM unit by the ordering of the elements of one FD-OCC within one CDM unit and the REs of one CDM group within one CDM unit. The length of one FD-OCC may be equal to the number of REs of one CDM group within one CDM unit. The number of REs in a single CDM unit may be equal to the number of CDM groups in that unit multiplied by the length of the FD-OCC. As shown in Figure 9, the number of REs in a single CDM unit is 4 * 2 = 8.

[0168] As shown in Figure 9, two PRBs may contain three CDM units of FD-OCC of length 4 in one OFDM symbol for each CDM group. Each CDM unit in one CDM group may contain four REs, each of which may correspond to one element of one FD-OCC of length 3.

[0169] If a 2-length FD-OCC is used, the UE may obtain a sequence of DMRS ports corresponding to the 2-length FD-OCC according to equation (1) and Table 1.

[0170] If an FD-OCC of length 4 is used, the UE may obtain a sequence of DMRS ports corresponding to the FD-OCC of length 4 according to equation (11). [ka] During the ceremony, w f (k', w t (l'), and Δ are obtained by Table 23. l can be obtained based on Table 2. In this configuration of the maximum number of consecutive OFDM symbols with a value of 1, w for l'=1 in Table 13 t (l') can be ignored. Next, in this configuration, w t (l') can have only one element corresponding to l'=0, thus containing DMRS ports {0,1,2,3,8,9,10,11}. DMRS ports distinguished by TD-OCC may be indicated to the UE in a max-length configuration equal to DMRS types 1 and 2. [Table 23]

[0171] Alternatively, equations (1) and (11) can be combined into the following equation: [ka] In the formula, L is the length of FD-OCC. For example, if the length of FD-OCC is 2, L can be 2, and if the length of FD-OCC is 4, L can be 4. In Table 23, one w t There may be two DMRS ports corresponding to (l'). One w for length L of FD-OCC t L DMRS ports can be provided corresponding to (l'), but in order to reduce the overhead of instructions in DCI, wf The DMRS port of the FD-OCC with length 2 having (k’) = [1, 1] and w f The DMRS port of the FD-OCC with length 4 having (k’) = [1, 1, 1, 1] may share the same DMRS port number, and w f The DMRS port of the FD-OCC with length 2 having (k’) = [1, -1] and w f The DMRS port of the FD-OCC with length 4 having (k’) = [1, -1, 1, -1] may share the same DMRS port number. Four w f (k’) can be selected from four orthogonal FD-OCCs with length 4. Since their sequences are the same, the UE may not distinguish between two DMRS ports sharing the same DMRS port number. The gNB can distinguish them based on the DMRS ports of the MU UE. For example, if the gNB schedules UE1 having DMRS ports {0, 1} and UE2 having DMRS ports {8, 9}, and UE1 and UE2 are MU UEs, the gNB may obtain the channels of the DMRS ports {0, 1} with length 4 FD-OCC. If the gNB schedules UE1 having DMRS port 0 and UE2 having DMRS port 1, and UE1 and UE2 are MU UEs, the gNB may obtain the channel of the DMRS port 0 with length 2 FD-OCC. That is, the length of the FD-OCC of the DMRS port 0 may be determined by the gNB, and the UE may not need to know. A similar manner can be applied to the DMRS ports {1~7}. For example, for the DMRS ports from 0 to 7, the FD-OCCs with length 2 and length 4 may share the same DMRS port number. The actual FD-OCC length of the DMRS ports {0, 1, 2, 3, 4, 5, 6, 7} may be determined by the gNB, and the UE may not need to know the actual FD-OCC length.

[0172] If the ranks indicated in the DCI are 1, 2, 3, and 4 respectively, the gNB can use tables 14 through 17 above to inform the UE which FD-OCC length should be used to transmit uplink DMRS. Tables 14 through 17 in the sequence may correspond to ranks 1 through 4, respectively. For example, table 14 corresponds to rank 1, table 15 corresponds to rank 2, and so on. The gNB can then dynamically switch between the DMRS ports of FD-OCC length 2 and FD-OCC length 4. This allows a new UE to be scheduled as an MU (Multiple UE) UE with an old UE or the new UE. The new UE may have or support the Rel-18 DMRS extension. The old UE may not have or support the Rel-18 DMRS extension. For example, if a gNB attempts or attempts to schedule one old UE and one new UE in one CDM group as MU UEs, the gNB can schedule the new UEs with DMRS ports corresponding to FD-OCCs of length 2. If a gNB attempts or attempts to schedule four new UEs in one CDM group as MU UEs, the gNB can schedule four new UEs with DMRS ports corresponding to FD-OCCs of length 4, for example, each of the four new UEs can be scheduled by one of the DMRS ports {0,1,8,9} in CDM group 0.

[0173] In some implementations, the rank value is determined according to the SRS resource indicator field when a non-codebook scheme is configured, and according to the precoding information field and layer number when a codebook scheme is configured.

[0174] The number of CDM groups without data for values ​​1, 2, and 3 in Tables 14 through 17 may refer to CDM groups {0}, {0,1}, and {0,1,2}, respectively, where CDM groups 0,1 may be shown in Figures 3, 9, Table 1, and Table 13. Example 3-2: DMRS Type I with a value of 2 and the maximum number of consecutive OFDM symbols

[0175] Figure 5 shows the DMRS pattern of a 2-length FD-OCC in two consecutive OFDMs. Figure 10 shows the DMRS pattern of a 6-length FD-OCC in two consecutive OFDMs. Two consecutive OFDMs can correspond to one TD-OCC unit. Each element of a 2-length TD-OCC can correspond to one OFDM within two consecutive OFDMs.

[0176] If a length 2 FD-OCC is used, the UE may assume a sequence of DMRS ports corresponding to FD-length 2 according to equation (4) and Table 1 below.

[0177] If an FD-OCC of length 6 is used, the UE may assume a sequence of DMRS ports corresponding to FD-length 2 according to equation (13) and Table 23 below. [ka]

[0178] Equations (1), (11), (12), and (13) can be combined into the following equation (14): [ka] Here, X is the number of consecutive OFDM symbols for DMRS. If max-length is determined (or constructed) to be 1, then X can be 1 and l'=0. If max-length is determined (or constructed) to be 2 and a single symbol is indicated by DCI, then X can be 1 and l'=0. If max-length is determined / constructed to be 2 and a double symbol is indicated by DCI, then X can be 2 and l'=0,1.

[0179] The DCI may indicate whether the number of consecutive symbols is 1 or 2, depending on the number of front-load symbols, as shown in Tables 18 to 22. The DCI may indicate which FD-OCC length is used by the UE to transmit uplink DMRS. The DCI may indicate which DMRS port corresponds to the FD-OCC of length 2 and the FD-OCC of length 4.

[0180] The gNB can inform the UE which FD-OCC length should be used to transmit the uplink DMRS, according to Tables 18 through 22 below, given that the rank indicated in the DCI is 1, 2, 3, or 4, respectively. The sequence from Tables 18 through 22 may correspond to ranks 1 through 4. Table 18 may be enabled when the rank is indicated as 1, and Table 19 may be enabled when the rank is indicated as 2.

[0181] In the cases of Examples 3-1 and 3-2 described above, the number of REs in one PRB is 12, which is not a multiple of one CDM unit; therefore, it requires a PRB group containing two bundled PRBs and the minimum number of CDM units, i.e., three CDM units. The UE can determine which two PRBs should be bundled in order to obtain three CDM units of FD-OCC of length 4.

[0182] In some implementations, the UE determines that every two consecutive PRBs are bundled and that the first two PRBs of the BWP are bundled. The UE expects that the number of PRBs in the BWP should be an integer multiple of 2. Alternatively, if the number of PRBs in the BWP is not an integer multiple of 2, the UE may not expect to be indicated by the DMRS ports corresponding to FD-OCCs of length 4 when the UE is allocated the last PRB of the BWP. In a third implementation, the UE can be indicated by the DMRS ports corresponding to FD-OCCs of length 4 in the other PRBs except for the last PRB having the DMRS ports corresponding to FD-OCCs of length 2. That is, different PRBs can be allocated to the DMRS ports corresponding to different FD-OCC lengths. Each DMRS port corresponding to an FD-OCC of length 4 can be associated with the DMRS ports of the FD-OCC of length 2. The UE can be indicated by the DMRS ports corresponding to FD-OCCs of length 4, and the UE determines that the indicated DMRS ports are applied to the other PRBs except for the last PRB that should have the DMRS ports of the FD-OCC of length 2 (or 3, 6) associated with the indicated DMRS ports when the UE is allocated the last PRB and the number of PRBs in the BWP is not an integer multiple of 2.

[0183] In some implementations, the UE may determine which two PRBs should be bundled according to the PRB size of the BWP, i.e., the starting PRB index of the BWP. For example, the BWP is divided into a plurality of PRB groups each including two consecutive PRBs except for the first PRB group and the last PRB group. The first PRB group may include 2 - P start,BWP mod2 PRBs starting from the first PRB of the BWP. P start,BWP may be the common PRB index of the first PRB of the BWP. The common PRB index may be the PRB index having the reference subcarrier 0 that coincides with point A. The first PRB group may include the first two consecutive PRBs of the BWP when P start,BWP mod2 = 0. The first PRB group may include P start,BWPIf mod2≠0, it may only contain the first PRB of BWP. The last PRB group is (P start,BWP +N size,BWP If mod 2 ≠ 0, then (P start,BWP +N size,BWP ) may contain modulo 2 PRBs. That is, the last PRB group is (P start,BWP +N size,BWP If mod 2 ≠ 0, then the last PRB in BWP may be included. The last PRB group is (P start,BWP +N size,BWP)mod2=0, which may include the last two PRBs of the BWP. In some implementations, the UE may expect that the first and last PRB groups may contain two PRBs if a DMRS port corresponding to an FD-OCC of length 4 can be assigned to the UE. In another implementation, if the first PRB group (and / or last PRB group) does not contain two PRBs, the UE does not need to expect that if the UE is assigned a PRB in the first PRB group (or last PRB group), it will be indicated by a DMRS port corresponding to an FD-OCC of length 4. In a third implementation, the UE may be indicated by a DMRS port corresponding to an FD-OCC of length 4 in any PRB group other than the first PRB group (and / or last PRB group), which may be a DMRS port corresponding to an FD-OCC of length 2. For example, different PRB groups may be assigned to DMRS ports corresponding to different FD-OCC lengths. Each DMRS port in a length 4 FD-OCC can be associated with a DMRS port in a length 2 (or 3, 6) FD-OCC. A UE can be identified by a DMRS port corresponding to a length 4 FD-OCC, and the UE may determine that the identified DMRS port applies to all PRB groups except the first PRB group (and / or last PRB group), which should have a DMRS port in a length 2 FD-OCC associated with the identified DMRS port if the UE is assigned to a PRB in the first PRB group (and / or last PRB group) and the number of PRBs in the first PRB group (and / or second PRB group) BWP is 1. A single PRB group may be in a single PRG (Precoding Resource Block Group). The precoding of channels in a single PRG may be the same.

[0184] In the above implementation, if a UE is assigned a DMRS port corresponding to an FD-OCC of length 4, the UE may be assigned not by just one PRB in a PRB group, but by all PRBs in a PRB group. For example, the UE may be assigned by two PRBs in a PRB group, or by two PRBs in a PRB group. Alternatively, the UE may use a DMRS port corresponding to an FD-OCC of length 4 for a PRB group to which two PRBs are assigned. The UE may use a DMRS port corresponding to an FD-OCC of length 4 / 2 for a PRB group to which one PRB is assigned according to DCI instructions.

[0185] In some implementations, the UE may determine two bundled PRBs based on assigned PRBs. The UE may determine two bundled PRBs in the manner described above, except that it replaces the PRB of the BWP with the assigned PRB. An assigned PRB is a PRB assigned by a single push transmission. It can be indicated by DCI or constituted by RRC signaling. For example, the UE is assigned by {PRB2, PRB3, PRB7, PRB17}, and then the UE determines which two PRBs are bundled in the manner described above by replacing the PRB of the BWP with a set of assigned PRBs such as {PRB2, PRB3, PRB7, PRB17}.

[0186] DMRS ports {0-7} corresponding to FD-OCCs of length 2 can be sequentially associated with DMRS ports {8-15} corresponding to FD-OCCs of length 4. Example 3-3

[0187] For the maximum number of consecutive OFDM symbols with DMRS type II and value 1, the DMRS pattern of FD-OCC of length 2 in one OFDM is shown in Figure 11. The DMRS pattern of FD-OCC of length 4 in one OFDM is shown in Figure 12.

[0188] If a length 2 FD-OCC is used, the UE may assume a sequence of DMRS ports corresponding to FD-length 2 according to equation (15) and table 24. [ka]

[0189] If an FD-OCC of length 4 is used, the UE may assume a sequence of DMRS ports corresponding to FD-length 4 according to equation (16) and table 25. [ka]

[0190] Equations (15) and (16) can be combined with equation (17). [ka] [Table 24] [Table 25]

[0191] DMRS ports corresponding to FD-OCCs of length 2 and length 4 can be dynamically switched by DCI. If the rank indicated in DCI is 1, the gNB can use Table 26 below to inform the UE which length of FD-OCC should be used to transmit uplink DMRS. For example, if the rank indicated in DCI is 1, the gNB may inform the DCI of the DMRS ports corresponding to FD-OCCs of length 2 and length 4 according to Table 26.

[0192] The number of CDM groups without data for values ​​1, 2, and 3 in Tables 26 through 29 may refer to CDM groups {0}, {0,1}, and {0,1,2}, respectively, where CDM groups 0,1,2 are shown in Figures 11, 12, Table 24, and Table 25. [Table 26]

[0193] As shown in Table 25, if a UE is associated with a DMRS port corresponding to an FD-OCC of length 4, the number of DMRS CDM groups without data may be 3, not 1 or 2. For example, gNB may only indicate UEs with DMRS ports corresponding to FD-OCCs of length 4 if gNB attempts or attempts to schedule more than 6 MU UEs; otherwise, gNB may only indicate UEs with DMRS ports corresponding to FD-OCCs of length 2.

[0194] If the rank indicated in the DCI is 2, the gNB may be notified by the DCI of DMRS ports corresponding to FD-OCCs of length 2 and FD-OCCs of length 4, according to Table 27. [Table 27]

[0195] If the rank indicated in the DCI is 3, the gNB may be notified by the DCI of DMRS ports corresponding to FD-OCCs of length 2 and FD-OCCs of length 4, according to Table 28. [Table 28]

[0196] If the rank indicated in the DCI is 4, the gNB may be notified by the DCI of DMRS ports corresponding to FD-OCCs of length 2 and FD-OCCs of length 4, according to Table 29. [Table 29]

[0197] In an alternative implementation, tables 26 through 29 can be replaced by tables 30 through 33, respectively. Table 26 can be replaced by table 30. Table 27 can be replaced by table 31, etc. When tables 30 through 33 are enabled, the gNB can schedule a DMRS corresponding to a length 4 FD-OCC in CDM group 0, and the number of DMRS CDM groups without data is one of {1, 2, 3}. The gNB can schedule a DMRS corresponding to a length 4 FD-OCC in CDM group 1, and the number of DMRS CDM groups without data is one of {2, 3}. The gNB can schedule a DMRS corresponding to a length 4 FD-OCC in CDM group 2, and the number of DMRS CDM groups without data is 3. [Table 30] [Table 31] [Table 32] [Table 33]

[0198] For a single push transmission, the UE can be indicated by DMRS ports corresponding to FD-length 2 and FD-OCC lengths 4, such as DMRS ports corresponding to values ​​5 to 11 in Table 32 and DMRS ports corresponding to values ​​4 to 9 in Table 33. Example 3-4: For DMRS Type II with a value of 2 and the maximum number of consecutive OFDM symbols

[0199] Figure 13 shows the DMRS pattern of a 2-length FD-OCC in two consecutive OFDMs. Figure 14 shows the DMRS pattern of a 6-length FD-OCC in two consecutive OFDMs. Two consecutive OFDMs can correspond to one TD-OCC unit. Each element of a 2-length TD-OCC can correspond to one OFDM within two consecutive OFDMs.

[0200] If a length 2 FD-OCC is used, the UE may assume a sequence of DMRS ports corresponding to FD-length 2 according to equation (18) and table 24. [ka]

[0201] If an FD-OCC of length 4 is used, the UE may assume a sequence of DMRS ports corresponding to FD-length 4 according to equation (19) and table 25. [ka]

[0202] Equations (15) through (19) can be combined with equation (20). [ka] Here, X is the number of consecutive OFDM symbols for DMRS. If max-length is determined / configured to be 1, then X can be 1 and l'=0. If max-length is determined / configured to be 2 and a single symbol is indicated by DCI, then X can be 1 and l'=0. If max-length is determined / configured to be 2 and a double symbol is indicated by DCI, then X can be 2 and l'=0,1. A single or double symbol may be determined as the number of front-loaded symbols in Tables 33 to 36.

[0203] If the rank is indicated as 1 within DCI, the gNB may notify the UE of a DMRS port from a set of DMRS ports, including DMRS ports corresponding to FD-OCCs of length 2 and DMRS ports corresponding to FD-OCCs of length 4, according to Table 34.

[0204] As shown in Table 34, a DMRS corresponding to FD-OCC and CDM group 0 of length 4 can be represented by a UE with one of {1,3} of the number of DMRS CDM groups without data and one of {1,2} of the number of front-load symbols. A DMRS corresponding to FD-OCC and CDM group 1 of length 4 can be represented by a UE with 3 of the number of DMRS CDM groups without data and 2 of the number of front-load symbols. A DMRS corresponding to FD-OCC and CDM group 2 of length 4 can be represented by a UE with 3 of the number of DMRS CDM groups without data and 2 of the number of front-load symbols. [Table 34-1] [Table 34-2]

[0205] If the rank is indicated as 2 within DCI, the gNB may notify the UE of a DMRS port from a set of DMRS ports, including DMRS ports corresponding to FD-OCCs of length 2 and DMRS ports corresponding to FD-OCCs of length 4, according to Table 35. [Table 35]

[0206] If the rank is indicated as 3 within DCI, the gNB will notify the UE of the DMRS ports from the set of DMRS ports, which include DMRS ports corresponding to FD-OCCs of length 2 and DMRS ports corresponding to FD-OCCs of length 4, according to Table 36.

[0207] As shown in Table 36, TD-OCC w in Table 24 or Table 23 f If the UE is shown a DMRS port corresponding to (l')=[1,-1], the number of front-load symbols should be 2, and the number of DMRS CDM groups without data may be 3. If the UE is shown a DMRS port corresponding to an FD-OCC of length 4 in Table 24, the number of front-load symbols should be 2, and the number of DMRS CDM groups without data may be 3. [Table 36]

[0208] If the rank is indicated as 4 within DCI, the gNB may notify the UE of a DMRS port from a set of DMRS ports, including DMRS ports corresponding to FD-OCCs of length 2 and DMRS ports corresponding to FD-OCCs of length 4, according to Table 37. [Table 37]

[0209] In another implementation, the FD-OCC and TD-OCC w of table 24 have a length of 4. t (l')=[1,1], and the DMRS port corresponding to CDM group 0 can be shown to a UE having a number of DMRS CDM groups where the number of front-loaded symbols is one of {1,2}, rather than one of {1,2,3}. FD-OCC, TD-OCC w of length 4 in Table 24 t (l')=[1,-1], and the DMRS port corresponding to CDM group 0 can be shown to a UE where the number of DMRS CDM groups without data is one of {1,2,3} and the number of front-loaded symbols is 2.

[0210] Table 24, length 4, FD-OCC, TD-OCC w t (l')=[1,1], and the DMRS port corresponding to CDM group 1 can be shown to a UE where the number of DMRS CDM groups without data is one of {2,3} and the number of front-loaded symbols is one of {1,2}. FD-OCC, TD-OCC w of length 4 in Table 24 t (l')=[1,-1], and the DMRS port corresponding to CDM group 0 can be shown to a UE where the number of DMRS CDM groups without data is one of {2,3} and the number of front-loaded symbols is 2.

[0211] Table 24, length 4, FD-OCC, TD-OCC w t (l')=[1,1], and the DMRS port corresponding to CDM group 2 can be indicated to a UE where the number of DMRS CDM groups without data is 3 and the number of front-load symbols is one of {1,2}. FD-OCC, TD-OCC w of length 4 t (l')=[1,-1], and the DMRS port corresponding to CDM group 0 can be shown to a UE where the number of DMRS CDM groups without data is one of {2,3} and the number of front-loaded symbols is 2.

[0212] Table 24 TD-OCC w t The DMRS port corresponding to (l')=[1,1] can be indicated to a UE whose number of frontload symbols is one of {1,2}. See TD-OCC w in Table 24. t The DMRS port corresponding to (l')=[1,-1] can be indicated to a UE with 2 frontload symbols.

[0213] A DMRS port for a CDM group n ∈ {0, 1, 2} can be shown to a UE that has a number of DMRS CDM groups, rather than the data being one of {n+1, n+2, ..., 3}. For example, a DMRS port for CDM group 0 can be shown to a UE that has a number of DMRS CDM groups, rather than the data being one of {1, 2, 3}. A DMRS port for CDM group 1 can be shown to a UE that has a number of DMRS CDM groups, rather than the data being one of {2, 3}. A DMRS port for CDM group 1 can be shown to a UE that has a number of DMRS CDM groups, rather than the data being 3.

[0214] In some implementations, tables 34 through 37 are replaced by tables 38 through 41, respectively. [Table 38-1] [Table 38-2] [Table 39] [Table 40]

[0215] The UE can be represented by two DMRS ports corresponding to FD-OCCs of length 4 and one DMRS port corresponding to an FD-OCC of length 2. [Table 41] Example 4

[0216] UE corresponds to FD-length L, and resource elements (k,l) according to equation (21) for DMRS type I. p,μ We can assume a sequence of DMRS ports that are mapped to. [ka]

[0217] In some implementations, the UE corresponds to FD-length L, and the resource element (k,l) is defined according to equation (22) for DMRS type II. p,μ We can assume a sequence of DMRS ports that are mapped to. [ka]

[0218] In some implementations, UE corresponds to FD-length L, and resource elements (k,l) according to equation (23) p,μ We can assume a sequence of DMRS ports that are mapped to. [ka] In the expression, l' can be obtained according to Table 42. [Table 42]

[0219] [ka] It is the first symbol in each sequence of symbols. It can be obtained according to Table 2.

[0220] L is the length of the FD-OCC. f (k', w t(l'), the table used to obtain Δ is shown in Table 43. [Table 43]

[0221] In some implementations, for DMRS type I, the gNB can indicate the UE by a DCI having DMRS ports from a set of DMRS ports including DMRS ports corresponding to length 2 FD-OCCs shown in Table 1 and length 3 FD-OCCs shown in Table 3, as described in Examples 1-1 and 1-2. Tables 4 to 7 or 8 to 12 can be enabled by RRC / MAC-CE signaling that includes 1-bit information indicating whether Tables 4 to 7 or Tables 8 to 12 are enabled. In some implementations, the four new tables containing DMRS ports corresponding to length 3 FD-OCCs can be four other tables, each corresponding to one rank, and the four new tables can be enabled by a 1-bit parameter. Table 3 can also be enabled by a 1-bit parameter. If the four new tables are disabled, the old four tables can be enabled. Each of the old four tables may contain only DMRS ports containing length 2 FD-OCCs, each corresponding to one rank.

[0222] In some implementations, for DMRS type I, the gNB can indicate the UE by a DCI having a DMRS port from a set of DMRS ports including DMRS ports corresponding to length 2 FD-OCCs shown in Table 1 and length 6 FD-OCCs shown in Table 13, as described in Examples 2-1 and 2-2. Tables 14 to 17 or tables 18 to 22 can be enabled by RRC / MAC-CE signaling that includes 1-bit information to indicate whether tables 14 to 17 or tables 18 to 22 are enabled. In some implementations, the four new tables including DMRS ports corresponding to length 6 FD-OCCs can be four other tables, each corresponding to one rank, and the four new tables can be enabled by a 1-bit parameter. Table 13 can also be enabled by a 1-bit parameter.

[0223] In some implementations, for DMRS type I, the gNB can indicate the UE by a DCI having a DMRS port from a set of DMRS ports including DMRS ports corresponding to length 2 FD-OCCs shown in Table 1 and length 4 FD-OCCs shown in Table 23, as described in Examples 3-1 and 3-2. Tables 14 to 17 or tables 18 to 22 can be enabled by RRC / MAC-CE signaling that includes 1-bit information to indicate whether tables 14 to 17 or tables 18 to 22 are enabled. In some implementations, the four new tables including DMRS ports corresponding to length 4 FD-OCCs can be four other tables, each corresponding to one rank, and the four new tables can be enabled by a 1-bit parameter. Table 23 can also be enabled by a 1-bit parameter.

[0224] In some implementations, for DMRS Type II, the gNB can indicate the UE by a DCI having a DMRS port from a set of DMRS ports including DMRS ports corresponding to length 2 FD-OCCs shown in Table 24 and length 4 FD-OCCs shown in Table 25, as described in Examples 3-3 and 3-4. Any of Tables 26 to 29, 30 to 33, 34 to 37, or 38 to 41 can be enabled by RRC / MAC-CE signaling that includes 1-bit information indicating whether Tables 14 to 17 or Tables 18 to 22 are enabled. In some implementations, the four new tables including DMRS ports corresponding to length 4 FD-OCCs can be four other tables, each corresponding to one rank, and the four new tables can be enabled by a 1-bit parameter. Table 25 can also be enabled by a 1-bit parameter.

[0225] In some implementations, for DMRS type I, the gNB can be identified by a DCI having a DMRS port from a set of DMRS ports that includes DMRS ports corresponding to FD-OCCs of length 2 as shown in Table 1, FD-OCCs of length 3 as shown in Table 3, and FD-OCCs of length 6. That is, the length of the FD-OCC can be dynamically switched by the DCI between lengths 2, 3, and 6. For one CDM group / one UL transmission, the UE can be identified by a DMRS port corresponding to an FD-OCC length that is one of {2,3,6,(2,3),(2,6)}, excluding (3,6). The DMRS port corresponding to 3 and another DMRS port corresponding to an FD-OCC of length 6 do not have to be identified together in the UE for one UL transmission / one CDM group. One UL transmission corresponds to one code point value in the table. The code point is the code point of the antenna indication. DMRS ports corresponding to FD-OCC lengths (2,3) include DMRS ports corresponding to FD-OCCs of length 2 and DMRS ports corresponding to FD-OCC lengths. This is because different FD-OCC lengths may be suitable for different scenarios. For example, shorter FD-OCC lengths are suitable for frequency-selective channels, while longer FD-OCC lengths are suitable for frequency-flat channels. There are more orthogonal DMRS ports that use longer FD-OCC lengths. The gNB can assign the appropriate DMRS port according to the current scenario. In RRC signaling / MAC-CE signaling, one bit of information enables four new tables containing DMRS ports corresponding to three FD-OCC lengths. Each of the four new tables containing DMRS ports of three FD-OCC lengths corresponds to one rank. Tables 3 and 13 can also be enabled by one bit of information.

[0226] In some implementations, for DMRS type I, the gNB can identify the UE by a DCI having a DMRS port from a set of DMRS ports that includes DMRS ports corresponding to FD-OCCs of length 2 shown in Table 1, FD-OCCs of length 4 shown in Table 23, and FD-OCCs of length 6 shown in Table 13. That is, the length of the FD-OCC can be dynamically switched by the DCI between lengths 2, 4, and 6. For one CDM group, the UE can be identified by a DMRS port corresponding to an FD-OCC length that is one of {2,4,6,(2,4),(2,6)}, excluding (4,6). The DMRS port corresponding to 4 and another DMRS port corresponding to an FD-OCC of length 6 do not have to be identified together in the UE for one UL transmission / one CDM group. In RRC signaling / MAC-CE signaling, one bit of information enables four new tables containing DMRS ports corresponding to three FD-OCC lengths. Each of the four new tables, containing DMRS ports of three FD-OCC lengths, corresponds to one rank. Tables 3 and 23 can also be enabled by 1-bit information.

[0227] In some implementations, for DMRS type I, the gNB can be identified by a DCI having a DMRS port from a set of DMRS ports that includes DMRS ports corresponding to FD-OCCs of length 2 shown in Table 1, FD-OCCs of length 4 shown in Table 23, FD-OCCs of length 6 shown in Table 13, and FD-OCCs of length 3 shown in Table 3. That is, the length of the FD-OCC can be dynamically switched by the DCI between lengths 2, 3, 4, and 6. For one CDM group, the UE can be identified by a DMRS port corresponding to an FD-OCC length that is one of {2,4,6,(2,4),(2,6),(2,3)}, excluding {(4,6),(3,4),(3,6)}. Two DMRS ports corresponding to two different FD-OCC lengths that do not include 2 do not have to be identified together in the UE for one UL transmission / one CDM group. In RRC signaling / MAC-CE signaling, a single bit of information enables four new tables containing DMRS ports corresponding to four FD-OCC lengths. Each of these four new tables, containing DMRS ports for three FD-OCC lengths, corresponds to one rank. Tables 3, 13, and 23 can also be enabled by a single bit of information.

[0228] In the above implementation, only one type of new table exists. The new type of table can be enabled by 1-bit information. The table is selected by the DMRS type, the max-length of consecutive OFDM symbols, and the 1-bit information. The 1-bit information can be in RRC signaling or MAC-CE signaling, and can be new information such as new table enablement, FD-OCC max-length, or other names. The table may be for displaying DMRS port information as shown in Tables 4 to 11, Tables 14 to 22, and Tables 16 to 41. The number of bits in the antenna bit field can be determined by the DMRS type, the max-length of consecutive OFDM symbols, and the 1-bit information.

[0229] In an alternative implementation, the new table contains more modes than one in the DMRS table, and more than one bit parameter indicates which mode in the table is used. The antenna bit field table is selected by the DMRS type, the max-length of consecutive OFDM symbols, and one bit of information. The number of bits in the antenna bit field can be determined by the DMRS type, the max-length of consecutive OFDM symbols, and more than one bit of information. For example, more than one bit parameter may be used to allow tracking of at least two modes, including modes A through F. Modes A through F may also be named types A through F. Modes A through F may be used here to avoid confusion with DMRS types I / II. [Table 44]

[0230] In some implementations, the DMRS type parameters may reside within MAC-CE, and then Type I and Type II can be switched via MAC-CE signaling.

[0231] In some implementations, the parameter for a max-length continuous OFDM symbol may be located within the MAC-CE, and the MAC-CE can switch between max-length being 1 and max-length being 2.

[0232] In some implementations, the candidate modes for a new Type I table differ from those for a new Type II table. For example, in the case of Type II, only Mode C can be a candidate mode. In the case of Type I, Modes A through F can be candidate modes. Instead of Type I, Mode B can be a candidate mode.

[0233] In some implementations, the parameter for enabling a new table and the DMRS type selection parameter are two different parameters. In other implementations, one parameter can indicate one combination of the DMRS type and the new table mode. That is, the DMRS type and the new table mode can be indicated together up to the same parameter overhead, because some combinations of the two parameters are not candidate combinations. For example, only mode C can be used for DMRS type II. Example 5

[0234] In the case of downlink transmission, the DMRS for the downlink channel can be represented by a table, which includes DMRS ports corresponding to FD-OCC lengths greater than 2, such that the FD-OCC length can be one of {2, 3, 4, 6}.

[0235] In the case of PDSCH's DMRS, the UE is: [ka] Except that it is based on Table 45-1 or Table 45-2, the sequence of DMRS ports of FD-OCC of length L can be obtained according to the above method of DMRS PUSCH.

[0236] For PDSCH DMRS, the reference point and position l0 for the first DM-RS symbol l in the above formula may depend on the mapping type. For PDSCH mapping type A, l is defined or determined relative to the start of the slot, and l0=3 when the upper-level parameter dmrs-TypeA-Position is equal to "position 3" and l0=2. For PDSCH mapping type B, l is defined relative to the start of the scheduled PDSCH resource and l0=0.

[0237] The location of the DM-RS symbol is, [ka] and duration l d It can be given by. For example, in the case of PDSCH mapping type A, l d This can be the duration between the first OFDM symbol of the slot and the last OFDM symbol of the scheduled PDSCH resource within the slot. For PDSCH mapping type B, l d l1 may be the duration of the scheduled PDSCH resource. Table 45-1 is applicable when the number of OFDM symbols in one DMRS OFDM symbol group is 1, and Table 45-2 may be applicable when the number of OFDM symbols in one DMRS OFDM symbol group is 2. In some embodiments, l1 is 11 or 12, depending on the upper layer configuration. [Table 45-1] [Table 45-2] Furthermore, if the same DMRS index is shared between different FD-OCCs having different FD-OCC lengths, the DMRS table for PUSCH should be unlinked, and the DMRS table for PDSCH should include a second parameter to indicate the FD-OCC length of the DMRS port having the same DMRS index. This is so that the UE can obtain the DMRS port and channel estimate of the DMRS port of the concurrently scheduled UE according to the actual FD-OCC of the DMRS port. The UE will then be subjected to concurrently scheduled UE interference according to the DMRS port of the concurrently scheduled UE. Subsequently, the UE can decode the PDSCH more accurately.

[0238] For example, in the case of DMRS type I, the same DMRS port index is shared between the DMRS ports of the first category, which have a first FD-OCC[1,1], and the DMRS ports of the second category, which have a second FD-OCC of length L and L elements that are 1, e.g., [1,1,1] for L=3, [1,1,1,1] for L=4, and [1,1,1,1,1,1] for L=6. When a UE is assigned a DMRS port from DMRS ports {0,2,4,6}, the UE needs to know which DMRS port is used by the FD-OCC between the first and second FD-OCCs. Each CDM group contains up to two DMRS ports with the same index. If the FD-OCC of DMRS ports with the same index is [1,1], then the DMRS ports of concurrently scheduled DMRS ports include other DMRS ports with an FD-OCC of length 2 in each CDM group without data. If the FD-OCC of DMRS ports with the same index is [1,1,1], then the DMRS ports of concurrently scheduled DMRS ports include other DMRS ports with an FD-OCC of length 3 in each CDM group without data. In some implementations, for DMRS type I, the same DMRS port index for each of the DMRS ports {1,3,5,7} is shared between the DMRS ports of a first category with a first FD-OCC[1,-1] and the DMRS ports of a second category with a second FD-OCC of length L, where L elements include L / 2 iterations of [1,-1], such as [1,-1,1,-1] when L=4, and [1,-1,1,-1,1,-1] when L=6. If a UE is assigned a DMRS port from DMRS ports {1,3,5,7}, the UE needs to know which DMRS port is used by the FD-OCC between the first FD-OCC and the second FD-OCC. Each CDM group contains a maximum of two DMRS ports with the same index.If the FD-OCC of DMRS ports with the same index is [1,-1], then the DMRS ports of concurrently scheduled DMRS ports include other DMRS ports with an FD-OCC of length 2 in each CDM group without data. If the FD-OCC of DMRS ports with the same index is an L / 2 iteration of [1,-1], then the DMRS ports of concurrently scheduled DMRS ports include other DMRS ports with an FD-OCC of length L in each CDM group without data. For example, for DMRS type II, the same DMRS port index for each of the DMRS ports {0,2,4,6,8,10} is shared between the DMRS ports of a first category with a first FD-OCC [1,1] and the DMRS ports of a second category with a second FD-OCC of length L and L elements being 1, such as [1,1,1,1] when L=4. If a UE is assigned a DMRS port from DMRS ports {0,2,4,6,8,10}, the UE needs to know which DMRS port is used by the FD-OCC between the first FD-OCC and the second FD-OCC. Each CDM group contains up to two DMRS ports with the same index. If the FD-OCC of a DMRS port with the same index is [1,1], then the DMRS port of a concurrently scheduled DMRS port includes other DMRS ports with an FD-OCC of length 2 in each CDM group without data. If the FD-OCC of a DMRS port with the same index is [1,1,1], then the DMRS port of a concurrently scheduled DMRS port includes other DMRS ports with an FD-OCC of length 3 in each CDM group without data. In some implementations, for DMRS type II, the same DMRS port index is shared between the DMRS ports of a first category having a first FD-OCC[1,-1] and the DMRS ports of a second category having a second FD-OCC of length L, where L elements include L / 2 iterations of [1,-1], such as [1,-1,1,-1] when L=4.If a UE is assigned a DMRS port from DMRS ports {1,3,5,7}, the UE needs to know which DMRS port is used by the FD-OCC between the first FD-OCC and the second FD-OCC. Each CDM group contains up to two DMRS ports with the same index. If the FD-OCC of a DMRS port with the same index is [1,-1], then the DMRS port of a concurrently scheduled DMRS port includes other DMRS ports with an FD-OCC of length 2 in each CDM group without data. If the FD-OCC of a DMRS port with the same index is an L / 2 iteration of [1,-1], then the DMRS port of a concurrently scheduled DMRS port includes other DMRS ports with an FD-OCC of length L in each CDM group without data. Unlike the DMRS table for PUSCH, the DMRS table for PDSCH is not selected by rank. The DMRS table for PDSCH contains multiple values, each of which can correspond to a different rank.

[0239] Alternatively, in the case of PUSCH, the same DMRS index is shared between different FD-OCCs having different FD-OCC lengths, whereas in the case of PDSCH, the same DMRS index is shared between different FD-OCCs having different FD-OCC lengths. Furthermore, gNBs can schedule MU-UEs. Different CDM groups can have DMRS ports with different FD-OCC lengths. Each CDM group without a date is associated with its respective FD-OCC length. The DMRS table should include a third parameter to allow UEs to obtain DMRS ports for concurrently scheduled UEs. For example, the third parameter may include at least one of the following: the FD-OCC length for each CDM group without data, or whether different CDM groups have different FD-OCC lengths. Example 5-1 The maximum length of DMRS Type I and FD-OCC is 3

[0240] Similar to Example 1, when the DMRS type is configured to be Type I and the max-length is configured to be 1, there is one table for showing the downlink DMRS ports of the PDSCH, including a first category of DMRS ports corresponding to FD-OCCs of length 2 and a second category of DMRS ports corresponding to FD-OCCs of length 3. The pattern of the first DMRS ports can be obtained based on Table 1, Equation (1), and Figure 1. The pattern of the second DMRS can be obtained based on Table 45 or Table 46, Equation (2), and Figure 4. Unlike Table 3, the DMRS ports [1,1] corresponding to FD-OCCs and the DMRS ports [1,1,1] corresponding to FD-OCCs do not have to share the same DMRS port. This is because the UE may not know the actual length of the FD-OCC of the DMRS port in order to obtain the channel coefficient of the DMRS port. [Table 45] [Table 46]

[0241] The difference between Table 45 and Table 46 is the number sequence of the DMRS. When Table 42 is used, the same DMRS ports for uplink and downlink DMRS ports can correspond to the same FD-OCC, but the number of DMRS ports within one CDM group for a single symbol is not consecutive. For CDM group 0, it includes DMRS ports {8, 9, 16} for a single symbol / one TD-OCC. When Table 43 is used, the number of DMRS ports within one CDM group for a single symbol is consecutive. For CDM group 0, it includes DMRS ports {8, 9, 10} for a single symbol / one TD-OCC. Following the DMRS table, Table 43 can be used. When Table 42 is used, the DMRS ports {8~19} in the indicator table can be sequentially replaced by {8, 9, 16, 10, 11, 17, 12, 13, 18, 14, 15, 19}, respectively. For example, DMRS port 10 can be replaced by DMRS port 16. DMRS port 11 can be replaced by DMRS port 10, etc. Example 5-2: Maximum length of DMRS Type II and FD-OCC is 3

[0242] Similar to Example 3-3, the DMRS table may include DMRS ports with FD-OCCs of length 2 and FD-OCCs of length 4. The gNB can use Table 47 or Table 48 below to inform the UE which length of FD-OCC should be used to transmit downlink DMRS. [Table 47-1] [Table 47-2] [Table 48-1] [Table 48-2] [Table 48-3]

[0243] From Table 47, if the DMRS port corresponds to an FD-OCC length of 4, the number of CDM groups can be 3. For DMRS type I and max-length 1, a maximum of 8 DMRS ports can be assigned to the UE.

[0244] One difference between Table 47 and Table 48 is that Table 48 includes information indicating whether two CDM groups contain DMRS ports corresponding to different FD-OCC lengths, if there is more than one CDM group without data and a UE is assigned a DMRS corresponding to an FD-OCC of length 2 in CDM group 0, or an FD-OCC of length 4 in CDM group 1 or 2. Without clarification such as the two codeword values ​​0-7, DMRS ports in different CDM groups correspond to the same FD-OCC length. When DMRS ports in different CDM groups correspond to different FD-OCC lengths, DMRS ports for a potential MU UE in another CDM group without an assigned DMRS port may include DMRS ports corresponding to other FD-OCC lengths. Based on the information indicating whether different CDM groups contain DMRS ports corresponding to different FD-OCC lengths, a UE may obtain DMRS ports for potential concurrently scheduled UEs. For example, for one codeword and value 3, a UE may be assigned DMRS port 0 for its PDSCH transmission, and the two CDM groups include DMRS ports corresponding to the same FD-OCC length, and the UE then obtains that the DMRS for potential concurrently scheduled UEs includes {1, 2-3}. For one codeword and value 40, a UE may be assigned DMRS port 0 for its PDSCH transmission, and the two CDM groups include DMRS ports corresponding to different FD-OCC lengths, and the UE then obtains that the DMRS for potential concurrently scheduled UEs includes {1, 2, 3, 14, 15}.

[0245] Another difference between Table 48 and Table 47 is that Table 48 includes entries for DMRS ports of CDM groups 1 and 2, such as {0,1,2,3,14,15}, corresponding to the values ​​8–11 of two codewords. CDM group 0 includes DMRS ports for potential concurrently scheduled UEs of FD-OCC, with a length of 2.

[0246] Another difference between Table 48 and Table 47 is that Table 48 includes entries containing DMRS ports corresponding to different FD-OCC lengths in different CDM groups, such as {0,1,2,3,14,15}, which correspond to the value 2 of two codewords.

[0247] In Tables 47 and 48, for a DMRS port corresponding to FD-OCC length 4, the number of CDM groups without data can be 3. In other implementations, if a DMRS port corresponding to FD-OCC length 4 is in CDM group 0, the number of CDM groups without data can be 1, 2, or 3. If a DMRS port corresponding to FD-OCC length 4 is in CDM group 0, the table will contain entries that have the same DMRS port but with different numbers of entries without data.

[0248] Table 48 indicates whether the values ​​for the parameters contain {0,1} only for different FD-OCC lengths within different CDM groups. In some implementations, the first table may include a parameter indicating the FD-OCC length for each CDM group for which data is unavailable.

[0249] Figure 15 shows a flowchart of a method 1500 for communicating in accordance with DMRS port instructions based on a DMRS table, according to an embodiment of the present disclosure. Method 1500 can be implemented using any of the components and devices detailed herein in relation to Figures 1 to 14. Briefly, a radio communication node may determine a first DMRS table (1505). The radio communication node may transmit information for determining the first DMRS table (1515). A radio communication device may receive information (1520) and determine the first DMRS table in accordance with the information (1530). The radio communication node may transmit signaling, including to the radio communication device (1535). The radio communication device may receive signaling, including field values ​​(1540). The radio communication device may determine a first DMRS parameter in accordance with the first DMRS table and field values ​​(1550). The radio communication device may communicate signals with a communication node (1555 and 1560).

[0250] More specifically, a radio communication node may determine a first DMRS table (1505), and the radio communication node may transmit information for a radio communication device to determine the first DMRS table (1515). The first information may include at least one of the following: a Type I or Type II DMRS type, the maximum number of consecutive DMRS OFDM symbols, a second DMRS parameter, or the number of DMRS ports.

[0251] A wireless communication device may receive information (1520) and determine a first DMRS table according to the information (1530). In one embodiment, the wireless communication device stores a plurality of DMRS tables. Depending on the first information, the wireless communication device may determine a first DMRS table. For example, the wireless communication device may determine a first DMRS table according to a DMRS type between type I and type II, the maximum number of OFDM symbols in one DMRS OFDM symbol group, a second DMRS parameter, the total number of OFDM symbol groups included in one transmission opportunity, the number of DMRS ports, or any combination thereof. In one embodiment, the first DMRS table includes a mapping between the values ​​of signaling fields and the values ​​of the first DMRS parameters. Each of the field values ​​may be associated with each of the values ​​of the first DMRS parameters. In one embodiment, the first DMRS table includes a first DMRS parameter having values ​​associated with at least two categories of DMRS ports. In one embodiment, some values ​​of the first DMRS parameter are associated with one category. Other values ​​may be associated with multiple categories. At least two different categories of a DMRS port may correspond to at least one of the following: a different number of DMRS orthogonal frequency division multiplexing (OFDM) symbol groups in one time-domain orthogonal cover code (TD-OCC), a different number of DMRS OFDM symbols in one TD-OCC, a different number of DMRS OFDM symbols within one DMRS OFDM symbol group in one TD-OCC, or different relationships between vectors in one TD-OCC. Each DMRS OFDM symbol group may contain one or more consecutive OFDM symbols.

[0252] A wireless communication node may transmit signaling to a wireless communication device (1535). Examples of signaling include downlink control information (DCI) signaling, radio access control (RRC) signaling, or media access control / control element (MAC-CE) signaling. A wireless communication device may receive signaling (1540). Signaling may include one or more fields.

[0253] A wireless communication device may determine a first DMRS parameter according to a first DMRS table and the values ​​of the fields (1550). In some embodiments, the number of bits in the field is indicated by or determined according to the first DMRS information. Thus, the wireless communication device may receive a signal and determine, detect, or identify the field according to the number of bits indicated by the first DMRS information. The wireless communication device may apply the value of the field as an index to the first DMRS table and determine, retrieve, or identify the first DMRS parameter stored in the entry of the first DMRS table associated with the index.

[0254] A wireless communication device can communicate signals with a communication node (1555 and 1560). For example, a wireless communication device can select, control, or configure a DMRS port according to a first DMRS parameter. Through the determined DMRS port, the wireless communication device and the wireless communication node can communicate with each other.

[0255] While various embodiments of this solution have been described above, it should be understood that they are presented only as examples and not as limitations. Similarly, various figures may illustrate exemplary architectures or configurations provided to enable those skilled in the art to understand the exemplary features and functions of this solution. However, such persons will understand that the solution is not limited to the exemplary architectures or configurations shown and can be implemented using various alternative architectures and configurations. Furthermore, as will be understood by those skilled in the art, one or more features of one embodiment can be combined with one or more features of another embodiment described herein. Therefore, the breadth and scope of this disclosure should not be limited by any of the exemplary embodiments described above.

[0256] Furthermore, it should be understood that any reference to elements in this specification using designations such as “first,” “second,” etc., does not generally limit the quantity or order of those elements. Rather, these designations can be used in this specification as a convenient means of distinguishing two or more elements or examples of elements. Thus, references to first and second elements do not mean that only two elements can be used, or that the first element must in some way precede the second element.

[0257] Furthermore, those skilled in the art will understand that information and signals can be represented using any of the various different techniques and methods. For example, the data, instructions, commands, information, signals, bits, and symbols that may be mentioned in the above description can be represented by voltage, electric current, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0258] Those skilled in the art will further understand that any of the various exemplary logic blocks, modules, processors, means, circuits, methods, and functions described in connection with the embodiments disclosed herein can be implemented by various forms of programs or design code incorporating electronic hardware (e.g., digital implementations, analog implementations, or a combination of both), firmware, instructions (for convenience, referred to herein as “software” or “software modules”), or any combination thereof. To clearly illustrate this compatibility of hardware, firmware, and software, various exemplary components, blocks, modules, circuits, and steps are generally described above in relation to their functions. Whether such functions are implemented as hardware, firmware, software, or a combination thereof depends on the specific application and design constraints imposed on the overall system. Those skilled in the art can implement the described functions in various ways for specific applications, but such implementation decisions do not deviate from the scope of this disclosure.

[0259] Furthermore, those skilled in the art will understand that the various exemplary logic blocks, modules, devices, components, and circuits described herein can be implemented in and run within an integrated circuit (IC) which may include a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic device, or any combination thereof. The logic blocks, modules, and circuits may further include antennas and / or transceivers for communicating with various components in a network or within a device. The general-purpose processor may be a microprocessor, but in alternative examples, the processor may be any conventional processor, controller, or state machine. The processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other suitable configuration for performing the functions described herein.

[0260] When implemented in software, the functionality can be stored as one or more instructions or code on a computer-readable medium. Thus, steps of the methods or algorithms disclosed herein can be implemented as software stored on a computer-readable medium. The computer-readable medium includes both computer storage media and communication media, which include any media capable of transferring computer programs or code from one location to another. The storage media can be any available medium that can be accessed by a computer. Such computer-readable media, but not limited to examples, may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage devices, magnetic disk storage devices or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and can be accessed by a computer.

[0261] As used herein, the term “module” refers to software, firmware, hardware, and any combination thereof for performing the relevant functions described herein. Furthermore, for illustrative purposes, various modules are described as separate modules. However, as will be apparent to those skilled in the art, two or more modules may be combined to form a single module that performs the relevant functions according to embodiments of this solution.

[0262] Furthermore, in embodiments of this solution, memory or other storage devices, as well as communication components, may be used. For clarity, it will be understood that the above description has illustrated embodiments of this solution with reference to different functional units and processors. However, it will be clear that any suitable distribution of functions between different functional units, processing logic elements, or domains may be used without impairing the solution. For example, functions shown to be performed by separate processing logic elements or controllers may be performed by the same processing logic element or controller. Thus, references to specific functional units are not intended to indicate a strict logical or physical structure or organization, but merely to refer to suitable means for providing the described functions.

[0263] Various modifications to the embodiments described herein will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the embodiments shown herein, but should be given the broadest scope that coincides with the novel features and principles disclosed herein, as set forth in the following claims.

Claims

1. A method, wherein the method is A wireless communication device receives first information from a wireless communication node, wherein the first information includes the value of a field corresponding to a demodulation reference signal (DMRS) parameter, and the first information is present in the received RRC signaling. The wireless communication device determines, according to the first information, that the DMRS port category is enabled, wherein the DMRS port category has a frequency domain orthogonal cover code (FD-OCC) of length L, where L is 4. The wireless communication device, [Math 11] Accordingly, the resource element (k, l) ｐ，μ To determine the sequence of DMRS ports p having FD-OCC of length L that are mapped to and Includes, k = 2 * L * n + 2 * k' + Δ, where k is the subcarrier index. k' = 0, 1 , . . , L-1, where k' is an intermediate parameter for determining the index of the subcarrier k of the DMRS port, [Math 12] l is the OFDM symbol of the DMRS port, and l' is the index of the OFDM symbol among X consecutive DMRS OFDM symbols. 【number】 This is the starting OFDM symbol between the X consecutive OFDM symbols of the DMRS port, l' = 0, 1, ... X-1, where X is the number of consecutive DMRS OFDM symbols. n includes non-negative integer values. lol ｆ (k'), w ｔ (l'), and Δ are the DMRS port and the w ｆ (k'), w ｔ Provided by a defined table including the mapping between (l') and Δ, w ｆ (k') is FD-OCC, and w ｔ (l') is TD-OCC, and Δ is the RE offset associated with the CDM group. μ is a parameter relating to the subcarrier spacing, p is the index of the DMRS port, The aforementioned DMRS port p is a Type I DMRS port, and r(L*n+k') is the symbol that has index L*n+k' in the symbol sequence of r(•), in a way.

2. A method, wherein the method is A wireless communication device receives first information from a wireless communication node, wherein the first information includes the value of a field corresponding to a demodulation reference signal (DMRS) parameter, and the first information is present in the received RRC signaling. The wireless communication device determines, according to the first information, that the DMRS port category is enabled, wherein the DMRS port category has a frequency domain orthogonal cover code (FD-OCC) of length L, where L is 4. The wireless communication device, [Number 13] Accordingly, the resource element (k, l) ｐ，μ To determine the sequence of DMRS ports p of FD-OCC of length L that are mapped to and Includes, [Number 14] And k is the index of the subcarrier, k' = 0, 1 , . . , L-1, where k' is an intermediate parameter for determining the index of the subcarrier k of the DMRS port, and L is the length of one FD-OCC. [Number 15] l is the OFDM symbol of the DMRS port, and l' is the index of the OFDM symbol between X consecutive DMRS OFDM symbols. 【number】 This is the starting OFDM symbol between the X consecutive OFDM symbols of the DMRS port, l' = 0, 1, ... X-1, where X is the number of consecutive DMRS OFDM symbols. n includes non-negative integer values. w ｆ (k'), w ｔ (l'), and Δ are provided by a defined table including the mapping between the DMRS port and the w ｆ (k'), w ｔ (l'), and Δ, and w ｆ (k') is FD-OCC, w ｔ (l') is TD-OCC, and Δ is the RE offset associated with the CDM group. μ is a parameter relating to the subcarrier spacing, p is the index of the DMRS port, and the DMRS port is a Type II DMRS port. r(L*n+k') is the symbol that has index L*n+k' in the symbol sequence of r(•), in a way.

3. When the number of consecutive DMRS OFDM symbols is 1, the category of DMRS ports having an FD-OCC of length L includes DMRS ports {0-5, 12-17}. If the number of consecutive DMRS OFDM symbols is 1, then CDM group 0 includes DMRS ports {0, 1, 12, 13}, CDM group 1 includes DMRS ports {2, 3, 14, 15}, and CDM group 2 includes DMRS ports {4, 5, 16, 17}. When the number of consecutive DMRS OFDM symbols is 2, the category of DMRS ports having an FD-OCC of length L includes DMRS ports {0 to 23}. The method according to claim 2, wherein, when the number of consecutive DMRS OFDM symbols is 2, CDM group 0 includes DMRS ports {0, 1, 12, 13, 6, 7, 18, 19}, CDM group 1 includes DMRS ports {2, 3, 14, 15, 8, 9, 20, 21}, and CDM group 2 includes DMRS ports {4, 5, 16, 17, 10, 11, 22, 23}.

4. A method, wherein the method is A wireless communication device receives first information from a wireless communication node, wherein the first information includes the value of a field corresponding to a demodulation reference signal (DMRS) parameter, and the first information is present in the received RRC signaling. The wireless communication device determines, according to the first information, that the DMRS port category is enabled, wherein the DMRS port category has a frequency domain orthogonal cover code (FD-OCC) of length L, where L is 4. The wireless communication device determines the DMRS port of other wireless communication devices scheduled simultaneously with the wireless communication device in accordance with rules and signaling. Includes, The aforementioned rule includes that in one CDM group without data, the DMRS port of the wireless communication device and the DMRS port of the other wireless communication devices scheduled simultaneously have the same L, The signaling method includes the DMRS port of the wireless communication device.

5. A method, wherein the said method is A wireless communication node transmits first information to a wireless communication device, wherein the first information includes the value of a field corresponding to a demodulation reference signal (DMRS) parameter, and the first information is present in the transmitted RRC signaling. Includes, The wireless communication device determines the DMRS ports of other wireless communication devices scheduled simultaneously with the wireless communication device according to rules and signaling, the rules include that in one CDM group without data, the DMRS port of the wireless communication device and the DMRS port of the other wireless communication devices scheduled simultaneously have the same L, and the signaling includes the DMRS port of the wireless communication device. The wireless communication device determines, according to the first information, that a DMRS port category is enabled, and that the DMRS port category has a frequency domain orthogonal cover code (FD-OCC) of length L, where L is 4, in this manner.

6. The aforementioned wireless communication device, [Number 16] Accordingly, the resource element (k, l) ｐ，μ Determine the sequence of DMRS ports p having an FD-OCC of length L that is mapped to, k = 2 * L * n + 2 * k' + Δ, where k is the subcarrier index. k' = 0, 1 , . . , L-1, where k' is an intermediate parameter for determining the index of the subcarrier k of the DMRS port, [Number 17] l is the OFDM symbol of the DMRS port, and l' is the index of the OFDM symbol among X consecutive DMRS OFDM symbols. 【number】 This is the starting OFDM symbol between the X consecutive OFDM symbols of the DMRS port, l' = 0, 1, ... X-1, where X is the number of consecutive DMRS OFDM symbols. n includes non-negative integer values. lol ｆ (k'), w ｔ (l'), and Δ are the DMRS port and the w ｆ (k'), w ｔ Provided by a defined table including the mapping between (l') and Δ, w ｆ (k') is FD-OCC, and w ｔ (l') is TD-OCC, and Δ is the RE offset associated with the CDM group. μ is a parameter relating to the subcarrier spacing, p is the index of the DMRS port, The aforementioned DMRS port p is a Type I DMRS port, and The method according to claim 5, wherein r(L*n+k') is a symbol having index L*n+k' in the symbol sequence of r(•).

7. If the DMRS port in the aforementioned DMRS port category is a DMRS type I, The aforementioned DMRS port occupies REs on two consecutive DMRS PRBs, The method according to claim 5, wherein the number of PRBs in the DMRS port is an integer multiple of 2.

8. The aforementioned wireless communication device, [Number 18] Accordingly, the resource element (k, l) ｐ，μ Determine the sequence of DMRS ports p of FD-OCC of length L that are mapped to, [Number 19] And k is the index of the subcarrier, k' = 0, 1 , . . , L-1, where k' is an intermediate parameter for determining the index of the subcarrier k of the DMRS port, and L is the length of one FD-OCC. [Number 20] l is the OFDM symbol of the DMRS port, and l' is the index of the OFDM symbol between X consecutive DMRS OFDM symbols. 【number】 This is the starting OFDM symbol between the X consecutive OFDM symbols of the DMRS port, l' = 0, 1, ... X-1, where X is the number of consecutive DMRS OFDM symbols. n includes non-negative integer values. lol ｆ (k'), w ｔ (l'), and Δ are the DMRS port and the w ｆ (k'), w ｔ Provided by a defined table including the mapping between (l') and Δ, w ｆ (k') is FD-OCC, and w ｔ (l') is TD-OCC, and Δ is the RE offset associated with the CDM group. μ is a parameter relating to the subcarrier spacing, p is the index of the DMRS port, and the DMRS port is a Type II DMRS port. The method according to claim 5, wherein r(L*n+k') is a symbol having index L*n+k' in the symbol sequence of r(•).

9. A wireless communication device comprising at least one processor, The aforementioned at least one processor is Receiving first information from a wireless communication node via a receiver, wherein the first information includes the value of a field corresponding to a demodulated reference signal (DMRS) parameter, and the first information is present in the received RRC signaling. Determining the DMRS ports of other wireless communication devices scheduled simultaneously with the wireless communication device according to rules and signaling, wherein the rules include that in one CDM group without data, the DMRS ports of the wireless communication device and the DMRS ports of the other wireless communication devices scheduled simultaneously have the same L, and the signaling includes the DMRS ports of the wireless communication device. In accordance with the first piece of information, it is determined that the category of the DMRS port is enabled, wherein the category of the DMRS port has a frequency domain orthogonal cover code (FD-OCC) of length L, where L is 4. A wireless communication device configured to perform the following actions.

10. The aforementioned at least one processor is [Number 26] Accordingly, the resource element (k, l) ｐ，μ To determine the sequence of DMRS ports p having FD-OCC of length L that are mapped to It is configured to do the following: k = 2 * L * n + 2 * k' + Δ, where k is the subcarrier index. k' = 0, 1 , . . , L-1, where k' is an intermediate parameter for determining the index of the subcarrier k of the DMRS port, [Number 27] l is the OFDM symbol of the DMRS port, and l' is the index of the OFDM symbol among X consecutive DMRS OFDM symbols. 【number】 This is the starting OFDM symbol between the X consecutive OFDM symbols of the DMRS port, l' = 0, 1, ... X-1, where X is the number of consecutive DMRS OFDM symbols. n includes non-negative integer values. lol ｆ (k'), w ｔ (l'), and Δ are the DMRS port and the w ｆ (k'), w ｔ Provided by a defined table including the mapping between (l') and Δ, w ｆ (k') is FD-OCC, and w ｔ (l') is TD-OCC, and Δ is the RE offset associated with the CDM group. μ is a parameter relating to the subcarrier spacing, p is the index of the DMRS port, The aforementioned DMRS port p is a Type I DMRS port, and The wireless communication device according to claim 9, wherein r(L*n+k') is a symbol having index L*n+k' in the symbol sequence of r(•).

11. If the DMRS port in the aforementioned DMRS port category is a DMRS type I, The aforementioned DMRS port occupies REs on two consecutive DMRS PRBs, The wireless communication device according to claim 9, wherein the number of PRBs in the DMRS port is an integer multiple of 2.

12. The aforementioned at least one processor is [Number 28] Accordingly, the resource element (k, l) ｐ，μ To determine the sequence of DMRS port p of FD-OCC of length L that is mapped to It is configured to do the following: [Number 29] And k is the index of the subcarrier, k' = 0, 1 , . . , L-1, where k' is an intermediate parameter for determining the index of the subcarrier k of the DMRS port, and L is the length of one FD-OCC. [Number 30] l is the OFDM symbol of the DMRS port, and l' is the index of the OFDM symbol between X consecutive DMRS OFDM symbols. 【number】 This is the starting OFDM symbol between the X consecutive OFDM symbols of the DMRS port, l' = 0, 1, ... X-1, where X is the number of consecutive DMRS OFDM symbols. n includes non-negative integer values. lol ｆ (k'), w ｔ (l'), and Δ are the DMRS port and the w ｆ (k'), w ｔ Provided by a defined table including the mapping between (l') and Δ, w ｆ (k') is FD-OCC, and w ｔ (l') is TD-OCC, and Δ is the RE offset associated with the CDM group. μ is a parameter relating to the subcarrier spacing, p is the index of the DMRS port, and the DMRS port is a Type II DMRS port. The wireless communication device according to claim 9, wherein r(L*n+k') is a symbol having index L*n+k' in the symbol sequence of r(•).

13. When the number of consecutive DMRS OFDM symbols is 1, the category of DMRS ports having an FD-OCC of length L includes DMRS ports {0-5, 12-17}. If the number of consecutive DMRS OFDM symbols is 1, then CDM group 0 includes DMRS ports {0, 1, 12, 13}, CDM group 1 includes DMRS ports {2, 3, 14, 15}, and CDM group 2 includes DMRS ports {4, 5, 16, 17}. When the number of consecutive DMRS OFDM symbols is 2, the category of DMRS ports having an FD-OCC of length L includes DMRS ports {0 to 23}. The wireless communication device according to claim 12, wherein, when the number of consecutive DMRS OFDM symbols is 2, CDM group 0 includes DMRS ports {0, 1, 12, 13, 6, 7, 18, 19}, CDM group 1 includes DMRS ports {2, 3, 14, 15, 8, 9, 20, 21}, and CDM group 2 includes DMRS ports {4, 5, 16, 17, 10, 11, 22, 23}.

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