Indicator of association between demodulation reference signal and phase tracking reference signal

Abstract

Methods, apparatus, and systems are provided that enable the indication of demodulation reference signals (DMRS) and phase tracking reference signals (PTRS) to enhance PTRS and DMRS transmissions in future generations of wireless communication systems. In one example aspect, a method for wireless communication includes sending a signaling message from a base station to a terminal device, the signaling message indicating an association between more than four DMRS ports and at least two PTRS ports. The signaling message includes multiple groups of bits. Each group corresponds to a PTRS port, and each group includes one or more bits indicating a value corresponding to one of the more than four DMRS ports. The method also includes receiving a transmission from the terminal device by the base station based on the signaling message.

Description

[0001] This application is a divisional application of the invention patent application filed on April 28, 2022, with application number 202280037948.7 and title "Indication of Association between Demodulation Reference Signal (DMRS) and Phase Tracking Reference Signal (PTRS)". Technical Field

[0002] This patent document relates to wireless communication. Background Technology

[0003] Mobile communication technology is propelling the world towards an increasingly interconnected and networked society. The rapid growth of mobile communications and technological advancements have led to greater demands for capacity and connectivity. Other factors, such as energy consumption, device cost, spectrum efficiency, and latency, are also important for meeting the needs of various communication scenarios. Various technologies are being discussed, including new approaches to provide higher quality of service, longer battery life, and improved performance. Summary of the Invention

[0004] The patent document specifically describes techniques that enable the indication of demodulation reference signals (DMRS) and phase tracking reference signals (PTRS) to enhance PTRS and DMRS transmission in future generations of wireless communication systems.

[0005] In one example aspect, a method for wireless communication includes sending a signaling message from a base station to a terminal device, the signaling message indicating an association between more than four DMRS ports and at least two PTRS ports. The signaling message includes multiple groups of bits. Each group corresponds to a PTRS port, and each group includes one or more bits indicating a value corresponding to one of the more than four DMRS ports. The method also includes receiving a transmission from the terminal device by the base station based on the signaling message.

[0006] In another example, a method for wireless communication includes receiving a signaling message from a base station by a terminal device, the signaling message indicating an association between more than four DMRS ports and at least two PTRS ports. The signaling message includes multiple groups of bits. Each group corresponds to a PTRS port, and each group includes one or more bits indicating a value corresponding to one of the more than four DMRS ports. The method also includes the terminal device performing a transmission to the base station based on the signaling message.

[0007] In another example, a method for wireless communication includes sending a signaling message from a base station to a terminal device, the signaling message including at least three bits indicating an association between more than four DMRS ports and a single PTRS port. The method also includes receiving, from the terminal device, transmissions based on the signaling message by the base station.

[0008] In another example, a method for wireless communication includes receiving a signaling message from a base station by a terminal device, the signaling message including at least three bits indicating an association between more than four DMRS ports and a single PTRS port. The method also includes the terminal device performing a transmission to the base station according to the signaling message.

[0009] In another example, a communication device is disclosed. This device includes a processor configured to implement the methods described above.

[0010] In yet another example, a computer program storage medium is disclosed. This computer program storage medium includes code stored thereon. When executed by a processor, this code causes the processor to implement the methods described above.

[0011] These and other aspects are described in this document. Attached Figure Description

[0012] Figure 1A This is a flowchart representation of a method for wireless communication according to one or more embodiments of the present technology.

[0013] Figure 1B This is a flowchart representation of another method for wireless communication according to one or more embodiments of the present technology.

[0014] Figure 2A This is a flowchart representation of another method for wireless communication according to one or more embodiments of the present technology.

[0015] Figure 2B This is a flowchart representation of yet another method for wireless communication according to one or more embodiments of the present technology.

[0016] Figure 3 An example of a transmission port on an antenna panel according to one or more embodiments of the present technology is shown.

[0017] Figure 4 An example of a transmission port on two antenna panels according to one or more embodiments of the present technology is shown.

[0018] Figure 5 An example of a transmission port on four antenna panels according to one or more embodiments of the present technology is shown.

[0019] Figure 6 An example of PTRS mapping according to one or more embodiments of the present technology is shown.

[0020] Figure 7 An example of a wireless communication system in which one or more embodiments of the present technology can be applied is shown.

[0021] Figure 8 This is a block diagram representation of a portion of a radio station according to one or more embodiments to which the present technology can be applied. Detailed Implementation

[0022] In wireless communication systems, the phase noise of the transmitter increases with the operating frequency. A Phase Tracking Reference Signal (PTRS) can be used for phase noise estimation and demodulation reference signal (DMRS) estimation compensation. Therefore, during transmission, a PTRS port can be associated with a DMRS port. Currently, in New Radio (NR) communication systems, a User Equipment (UE) can support up to four DMRS ports and two PTRS ports. In the Downlink Control Information (DCI) signaling, two bits are used for PTRS-DMRS association. In some cases, only one PTRS port is supported. Two bits are used to indicate which of the up to four DMRS ports is associated with the PTRS port. In some cases, two PTRS ports are supported, and the two DMRS ports each share a PTRS port. Two bits are used to indicate the association between the DMRS port and the two PTRS ports: the first bit indicates which DMRS port is associated with PTRS port 0, and the second bit indicates which DMRS port is associated with PTRS port 1. A DMRS port corresponds to an SRS Resource Indicator (SRI) field and / or precoding information and layer digital segments. In some cases, two SRS resource indicator fields and / or precoded information and layer digital segments are supported, and each bit is used for the PTRS-DMRS association of the corresponding SRS resource indicator field and / or precoded information and layer digital segment.

[0023] Advances in wireless technology necessitate greater use of higher frequency bands and enhanced DMRS / PTRS designs in future generations of communication systems. This patent document discloses techniques enabling such enhancements to PTRS-DMRS designs. Specifically, the disclosed techniques can be used to support more than four DMRS ports and their association with two or more PTRS ports. The disclosed techniques can also be used to determine resource element mapping and power control for PTRS transmissions.

[0024] Figure 1AThis is a flowchart representation of a method 100 for wireless communication according to one or more embodiments of the present technology. Method 100 includes: in operation 110, a base station sending a signaling message to a terminal device, the signaling message indicating an association between more than four DMRS ports and at least two PTRS ports. The signaling message includes multiple groups of bits. Each group corresponds to a PTRS port, and each group includes one or more bits indicating a value corresponding to one of the more than four DMRS ports. Method 100 further includes: in operation 120, a base station receiving a transmission from the terminal device according to the signaling message.

[0025] Figure 1B This is a flowchart representation of a method 150 for wireless communication according to one or more embodiments of the present technology. Method 150 includes: in operation 160, a terminal device receiving a signaling message from a base station, the signaling message indicating an association between more than four DMRS ports and at least two PTRS ports. The signaling message includes multiple groups of bits. Each group corresponds to a PTRS port, and each group includes one or more bits indicating a value corresponding to one of the more than four DMRS ports. Method 150 further includes: in operation 170, the terminal device performing a transmission to the base station based on the signaling message.

[0026] In some embodiments, the signaling message comprises two sets of bits. Each set comprises at least one of the following: (1) two bits indicating an association between a PTRS port and one of up to four DMRS ports sharing that PTRS port; or (2) one bit indicating an association between a PTRS port and one of the first two DMRS ports sharing that PTRS port. In some embodiments, the signaling message comprises four sets of bits. Each set comprises one bit indicating an association between a PTRS port and one of up to two DMRS ports sharing that PTRS port.

[0027] In some embodiments, signaling messages are instructed for transmission from a terminal device to a base station. This transmission includes at least one of the following: transmission based on a partially coherent codebook, transmission based on an incoherent codebook, and / or transmission based on a non-codebook.

[0028] Figure 2A This is a flowchart representation of a method 200 for wireless communication according to one or more embodiments of the present technology. Method 200 includes: in operation 210, a base station sending a signaling message to a terminal device, the signaling message including at least three bits indicating an association between more than four DMRS ports and a single PTRS port. Method 200 further includes: in step 220, a base station receiving a transmission from the terminal device according to the signaling message.

[0029] Figure 2B This is a flowchart representation of a method 250 for wireless communication according to one or more embodiments of the present technology. Method 250 includes: in operation 260, a terminal device receiving a signaling message from a base station, the signaling message including at least three bits indicating an association between more than four DMRS ports and a single PTRS port. Method 250 further includes: in step 270, the terminal device performing a transmission to the base station according to the signaling message.

[0030] In some embodiments, signaling messages are instructed for transmission from a terminal device to a base station. This transmission includes at least one of fully coherent codebook-based transmission and / or non-codebook-based transmission.

[0031] The following describes some examples of the disclosed technologies.

[0032] Example 1

[0033] In codebook-based UL transmission, three schemes are supported: fully coherent transmission, partially coherent transmission, and incoherent transmission. In this embodiment, it is assumed that eight or more DMRS and two PTRS ports are supported. The UE can receive an indication in the DCI signaling used for uplink (UL) transmission, which indicates the DMRS port associated with the PTRS port. This indication includes at least three bits.

[0034] For fully coherent UL transmissions and / or non-codebook-based transmissions with probe resource signaling (SRS) resources or resource sets configured with the same PTRS port, if a PTRS port is configured, the configured DMRS ports share the same PTRS port. Only the configured DMRS port needs to be signaled, as the PTRS port is implicitly indicated. For example, for fully coherent UL transmissions, Table 1 shows example indications of the association between DMRS ports and configured PTRS ports according to one or more embodiments of the present technology. If eight DMRS ports are supported, three bits can be used to indicate the association between each DMRS port and the PTRS port. Other bits can be used to support more than eight DMRS ports.

[0035] Table 1 Example PTRS-DMRS Indication

[0036] value DMRS port 0 First Dispatch DMRS Port 1 Second Dispatch DMRS Port 2 Third Dispatch DMRS Port 3 Fourth scheduling DMRS port 4 Fifth Dispatch DMRS Port 5 Sixth Dispatch DMRS Port 6 Seventh Dispatch DMRS Port 7 Eighth Dispatch DMRS Port …… …… N to 15 (N>7) Reserved

[0037] For UL transmissions based on partially coherent and / or incoherent codebooks, a portion of the configured DMRS ports share a PTRS port. Therefore, it is necessary to indicate which DMRS port(s) share which PTRS port(s). Furthermore, the association between the sounding reference signal (SRS) resource / port and the DMRS port can be indicated in the SRS Resource Indicator (SRI) field and / or the Transport Precoder Matrix Indicator (TPMI). For example, the codebook used for UL transmissions is indicated by the TPMI field. This codebook can also indicate the association between DMRS ports and SRS ports. If the relationship between SRS ports and PTRS ports is configured, the association between DMRS ports and PTRS ports can be determined based on the association between DMRS ports and SRS ports.

[0038] Figure 3 An example 300 of a transmission port on an antenna panel according to one or more embodiments of the present technology is shown. Figure 3 As shown, eight antenna ports are associated with eight SRS ports. A portion of the SRS / DMRS ports are coherent. For example, SRS ports {0,4,1,5} are coherent with each other, and the other SRS ports {2,6,3,7} are coherent with each other. Therefore, SRS ports {0,4,1,5} share PTRS port 0, and SRS ports {2,6,3,7} share PTRS port 1. If a DMRS port is configured to be associated with a coherent SRS port, then the DMRS ports share the same PTRS port.

[0039] For codebook-based UL transport, the TPMI field indicates the UL codebook and the UL transport layer number. For example, if the codebook indicates DMRS ports sharing the same coherent SRS ports {0,4,1,5}, then it can be determined that the DMRS ports share the same PTRS port 0. In some embodiments, the PTRS-DMRS association can be indicated in a field (e.g., the PTRS-DMRS field) in the DCI signaling to show which DMRS port is associated with PTRS port 0. As another example, if the codebook indicates DMRS ports sharing the same coherent SRS ports {2,6,3,7}, then it can be determined that the DMRS ports share the same PTRS port 1. The PTRS-DMRS association can be indicated in the DCI signaling (e.g., the PTRS-DMRS field) to show which DMRS port is associated with PTRS port 1. As yet another example, if the codebook indicates DMRS ports with different coherent SRS ports, then it can be determined that two PTRS ports are supported and the associations between the DMRS ports and the two PTRSs are indicated separately.

[0040] In some embodiments, the DCI signaling message may include four or more bits for indicating the association between a DMRS port and a PTRS port. Assuming eight DMRS ports are supported, the four bits of the DCI signaling message can be divided into two groups. Each group includes two bits for indicating a PTRS-DMRS association with one of the PTRS ports. Table 2 shows another example indication of the association between DMRS ports and PTRS ports according to one or more embodiments of the present technology. As shown in Table 2, up to four DMRS ports share a PTRS port, and up to two PTRS ports are supported. The first two bits in the DCI field (e.g., in the PTRS-DMRS association field) can be used to indicate which of the up to four DMRS ports is associated with PTRS port 0, and the other two bits can be used to indicate which of the up to four DMRS ports is associated with PTRS port 1.

[0041] Table 2 Example PTRS-DMRS Indication

[0042]

[0043] Example 2

[0044] In this embodiment, it is assumed that eight or more DMRS ports and more than two PTRS ports are supported. The DCI signaling includes three or more bits for indicating PTRS-DMRS association. In some embodiments, up to 24 DMRS ports may be supported.

[0045] For fully coherent codebook-based and / or non-codebook-based transmissions with SRS resources or resource sets configured with the same PTRS port, the configured DMRS ports share the same PTRS port. Table 3 shows example indications of the association between DMRS ports and configured PTRS ports according to one or more embodiments of the present technology. If eight DMRS ports are supported, three bits can be used to indicate the association between each DMRS port and the PTRS port. Other bits can be used to support more than eight DMRS ports.

[0046] Table 3 Example PTRS-DMRS Indication

[0047] value DMRS port 0 First Dispatch DMRS Port 1 Second Dispatch DMRS Port 2 Third Dispatch DMRS Port 3 Fourth scheduling DMRS port 4 Fifth Dispatch DMRS Port 5 Sixth Dispatch DMRS Port 6 Seventh Dispatch DMRS Port 7 Eighth Dispatch DMRS Port …… …… N to 15 (N>7) Reserved

[0048] For UL transmissions based on partially coherent / incoherent codebooks and / or non-codebook-based uplink transmissions with SRS resources (sets) configured with the same PTRS port, a subset of the configured DMRS ports (e.g., up to two DMRS ports) may share the same PTRS port.

[0049] In some embodiments, the association between DRMS ​​and PTRS can be determined based on SRS configuration or explicitly indicated. Figure 4 Example 400 of transmission ports on two antenna panels according to one or more embodiments of the present technology is shown. In this example, SRS ports 0 and 2 share a PTRS port; SRS ports 1 and 3 share a PTRS port; SRS ports 4 and 6 share a PTRS port; and SRS ports 5 and 7 share a PTRS port. For codebook-based transmissions, when the TPMI field indicates the codebook for UL transmission, the TPMI field can also indicate which DMRS port(s) share the PTRS port. Figure 5 Example 500 of transmission ports on four antenna panels according to one or more embodiments of the present technology is illustrated. For example, each panel includes two antenna ports (e.g., SRS ports) sharing a PTRS port, and a total of four PTRS ports are supported. As another example, antenna ports in two panels share the same PTRS port, and up to two PTRS ports are supported (e.g., SRS ports 1, 0, 4, and 5 share PTRS port 0, and SRS ports 2, 3, 6, and 7 share PTRS port 1). The PTRS ports can be indicated to the UE in UL transmissions, and PTRS-DMRS associations can be included in DCI signaling to indicate which(s) DMRS ports share a PTRS port.

[0050] In some embodiments, up to four PTRS ports may be supported. Table 4 shows an example indication of the association between DMRS ports and configured PTRS ports according to one or more embodiments of the present technology. In this example, available bits (e.g., four bits) are divided into multiple groups corresponding to the number of supported PTRS ports (e.g., four PTRS ports). Each group includes one or more bits (e.g., one bit) that indicate which DMRS port(s) is associated with the corresponding PTRS port(s).

[0051] Table 4 Example PTRS-DMRS Indication

[0052]

[0053] Example 3

[0054] In some embodiments, when more than four DMRS ports are supported, how PTRS is mapped to resource elements and / or OFDM symbols depends on the DMRS design.

[0055] For fully coherent UL codebook-based and / or non-codebook-based transmissions where SRS resources are configured to share a single PTRS port, the configured DMRS ports share a single PTRS port. Take Type 1 DMRS with eight DMRS ports as an example. When DMRS ports share a single PTRS port, a resource element (RE) on an OFDM symbol can be used to map the PTRS. That is, if the PTRS is configured to be mapped onto a physical resource block (PRB), then REs #0 through #11 can be used for the PTRS. Parameters (e.g., resourceElementOffset) can be introduced to determine which REs can be mapped to the PTRS. Table 5 shows examples of resourceElementOffset values ​​for different DMRS types and ports. Note that the offset values ​​corresponding to the same offset indicator are different for different numbers of DMRS ports to reduce or minimize interference.

[0056] Table 5 Example Parameters

[0057]

[0058] In some embodiments, REs mapped to PTRS can be configured via RRC signaling and / or activated via MAC-CE. For example, there may be 12 REs on a PRB of an OFDM symbol. RRC signaling can configure RE indexes or a set of RE indexes in the PRB. In some embodiments, if a set of RCE indexes is configured, MAC-CE can be used to activate one or more indexes selected from that set. Tables 6-9 show example indications of DMRS ports of DMRS type 1 with different rank values ​​according to one or more embodiments of the present technology.

[0059] Table 6 Antenna Ports, DMRS Type = 1, Maximum Length = 2, Rank = 5

[0060]

[0061] Table 7 Antenna Ports, DMRS Type = 1, Maximum Length = 2, Rank = 6

[0062]

[0063] Table 8 Antenna Ports, DMRS Type = 1, Maximum Length = 2, Rank = 7

[0064]

[0065] Table 9 Antenna Ports, DMRS Type = 1, Maximum Length = 2, Rank = 8

[0066]

[0067] Tables 10-15 show example indications of DMRS ports with DMRS type 2 for different rank values ​​according to one or more embodiments of the present technology.

[0068] Table 10 Antenna Ports, DMRS Type = 2, Maximum Length = 1, Rank = 5

[0069]

[0070] Table 11 Antenna Ports, DMRS Type = 2, Maximum Length = 1, Rank = 6

[0071]

[0072] Table 12 Antenna Ports, DMRS Type = 2, Maximum Length = 2, Rank = 5

[0073]

[0074] Table 13 Antenna Ports, DMRS Type = 1, Maximum Length = 2, Rank = 6

[0075]

[0076] Table 14 Antenna Ports, DMRS Type = 1, Maximum Length = 2, Rank = 7

[0077]

[0078] Table 15 Antenna Ports, DMRS Type = 1, Maximum Length = 2, Rank = 8

[0079]

[0080] More than four DMRS ports can be enabled through UE configuration or indication. For example, if the UE is configured with a frequency domain orthogonal coverage code (OCC) of length 4, the UE can be indicated with more than four DMRS ports. For single-symbol DMRS, up to four DMRS ports can be supported in a code division multiplexing (CDM) group. For double-symbol DMRS, up to eight DMRS ports can be supported in a CDM group. If a DMRS port is indicated in a CDM group, the PTRS is associated with at least one of the DMRS ports indicated in the CDM group. In some embodiments, DMRS ports in a CDM group can share up to one PTRS port.

[0081] In some embodiments, the UE is configured to map DMRS to two REs on a PRB of an OFDM symbol. In this case, two REs can be used for a DMRS port mapping. Therefore, if a DMRS port is indicated to be associated with a PTRS port, two REs can be used to map the PTRS, and the PTRS can be mapped based on the following equation:

[0082]

[0083] Here, n = 0, 1, ...; k' = 0, 1 according to the DMRS port index, and Δ is related to the DMRS port index and the CDM group index. The RE offset supports two values, as shown in Table 16.

[0084] Table 16: Example Parameters

[0085]

[0086] Example 4

[0087] Since a PTRS port can be shared by a different number of DMRS ports and can be mapped to different REs of OFDM symbols, different transmission levels can be used to transmit PTRS and related transmissions on the Physical Uplink Shared Channel (PUSCH).

[0088] Table 17 shows example factors related to the PTRS power ratio per RE per layer. Considering the support of up to two PTRS ports, the parameter Q in Table 17... p Indicates the number of PTRS ports. For example, for a fully coherent UL transmission with rank 8, all 8 DMRS ports share one PTRS port, so the energy on each RE of the PTRS can be 8 times that of each PUSCH transmission (e.g., 10 × log(rank), 9 dB). For UL transmissions based on non-codebooks and / or incoherent codebooks, only one SRS port corresponds to one PTRS port. The power of other PUSCH transmissions cannot be used to enhance the transmission power of the PTRS. Therefore, if only one PTRS port is used, the transmission energy is 0, and if two PTRS ports are used, the transmission power of each PTRS port is doubled (e.g., 3 dB). For partially coherent transmissions with up to four DMRS ports sharing one PTRS port, the energy can be up to four times the PUSCH transmission power (e.g., 6 dB if one PTRS port is configured for a fully coherent case). If two PTRS ports are used, the RE mapped to PTRS port 1 can no longer be used for PUSCH transmission, so energy can be added to PTRS port 0 and become 8 times that of each PUSCH layer (e.g., 10 × log(Q)).DMRS )+3×Q p -3). Here, Q DMRS It refers to the number of DMRS ports that share a PTRS, Q. p This refers to the number of PTRS ports. When one or two PTRS ports are configured, the energy becomes 3Q. p +3. In the case of partially coherent transmission, DMRS ports can be divided into subsets corresponding to PTRS ports. The ports in each subset are coherent, but different subsets can have different numbers of ports. For example, for a Layer 6 uplink transmission, DMRS ports can be divided into two subsets, each with three DMRS ports in each group. Alternatively, DMRS ports can be divided into two subsets, each with two and four DMRS ports respectively. In some embodiments, to achieve better power utilization across PTRS ports, power can be shared between different PTRS ports. For example, two DMRS ports share PTRS port 0, and four DMRS ports share PTRS port 1, resulting in PTRS port 0 having twice the power of a Layer 1 PUSCH transmission, while PTRS port 1 has four times the power of a Layer 1 PUSCH transmission. To make power utilization consistent in both cases, power can be shared across PTRS ports so that two PTRS ports use the same power level (e.g., based on a total of six DMRS ports). That is, the power ratio of PTRS ports is related to the total number of DMRS ports sharing the PTRS ports. In some embodiments, PTRS power can be limited by rules so that the transmission power of each PTRS port is the same regardless of how many DMRS ports are associated with the PTRS port.

[0089] Table 17 Factors related to the power ratio of PUSCH and PT-RS per RE per floor

[0090]

[0091] For partially coherent UL transmissions, the power of the PTRS is associated with the codebook indicated by the TPMI or the number of coherent antenna ports associated with the PTRS port. For example, if the UL transmission supports two panels and each panel has four antenna ports, and if the antenna ports in each panel are coherent, the PTRS power is associated with the number of DMRS ports in each panel. For example, when one PTRS port is indicated, the power is determined to be 10 × log (rank). When two SRS ports are shared by two DMRS ports (e.g., the TPMI indicates that DMRS ports 0 and 1 are associated with SRS ports 0 and 2, and DMRS ports 2 and 3 are associated with SRS ports 1 and 3), each panel can be determined to be partially coherent, and the power of the PTRS port is associated with the number of DMRS ports sharing the same SRS port. For example, if up to four DMRS ports are transmitted on a panel and up to two PTRS ports are supported, the power of the PTRS port on each panel can be indicated according to the number of layers (e.g., 1 to 4). If more PTRS ports are supported for up to 8 DMRS ports, the power of the other PTRS ports can also be used to enhance the power of the PTRS ports.

[0092] In some embodiments, for incoherent or non-codebook-based transmissions, the power of the current PTRS port can be boosted using the power of other PTRS ports. The power can be determined as 10 × log(number of PTRS ports). In some embodiments, the PTRS power can be used based on the total number of DMRS ports corresponding to all PTRS ports (e.g., for a panel with full coherence).

[0093] In some embodiments, if the panel has partial coherence, the power of the PTRS port can be 10 × log(number of DMRS). Here, the number of DMRS ports is the total number of DMRS ports that share the same SRS port with each PTRS port. For example, if two DMRS ports share SRS ports 0 and 2, and PTRS port 0 is also associated with these two SRS ports, then two DMRS ports are considered regardless of the actual DMRS ports sharing the PTRS port. In some embodiments, when more than one PTRS port is supported, at least one PTRS port is associated with the number of DMRS ports. For example, two DMRS ports are associated with PTRS1. The total PTRS power of each port is associated with the DMRS ports that share the same SRS port corresponding to the PTRS. If different numbers of DMRS ports share different PTRS ports (e.g., 2 DMRS ports share PTRS port 0, and 4 DMRS ports share PTRS port 1), then the power of each PTRS port can be different without any power boost from other PTRS ports. Therefore, the power of a PTRS port can be associated with the number of PTRS ports and the number of DMRS ports sharing the same SRS port. Alternatively or additionally, the power of a PTRS port may be associated with the total number of DMRS ports that share the same SRS port as that PTRS port and / or other PTRS ports.

[0094] Example 5

[0095] In some embodiments, four or more bits in DCI signaling may form a single field (e.g., a PTRS-DMRS association field). However, due to concerns about DCI signaling overhead and decoding complexity, in some embodiments, four or more bits may come from multiple fields in the DCI signaling. In particular, reserved or unused bits in other fields of the DCI signaling may be used to indicate PTRS-DMRS association.

[0096] As shown in Table 6-15, when the transmission rank is greater than 2, some reserved bits are present in the DMRS port indication field of the DCI. Therefore, the selected bits in this field can be used to indicate PTRS-DMRS association. For example, if more than four DMRS ports are configured (e.g., more than two bits are required), the reserved bits are enabled to indicate PTRS-DMRS association. In some embodiments, two bits in the PTRS-DMRS association field can be used to indicate the association of the first two PTRS ports and the associated DMRS port, and the other two reserved bits in the DCI field can be used to indicate the association of the last two PTRS ports and the associated DMRS port.

[0097] In some embodiments, only two PTRSs are supported, and each PTRS port is shared by up to four DMRS ports. Two bits in the PTRS-DMRS field are used to indicate the association between the DMRS port and the first PTRS port (PTRS port 0). Two bits in the reserved bits in the DCI field are used to indicate the association between the DMRS port and the second PTRS port (PTRS port 1). In some embodiments, the reserved bits can be considered as the second PTRS-DMRS association field used to indicate the association between DMRS and PTRS ports.

[0098] Example 6

[0099] If two or more PTRS ports are supported, PTRS can be mapped to RE using OCC in the frequency domain. Frequency domain OCC (FD-OCC) is used to multiplex DMRS ports together (e.g., multiplex them into a pair of symbols).

[0100] In some embodiments, four PTRS ports can be mapped to an RE using an OCC of length four, such as [1,1,1,1], [1,1,-1,-1], [1,-1,1,-1], and [1,-1,-1,1]. In some embodiments, two PTRS ports can be mapped to an RE using an OCC of length two, such as [1,1] or [1,-1]. Figure 6 An example 600 of PTRS mapping according to one or more embodiments of the present technology is shown. In this example, such as Figure 6 As shown, four PTRS ports are supported and mapped onto a PRB. PTRS ports 0 and 1 can be mapped onto two REs of the PRB as PTRS group 0, and PTRS ports 2 and 3 can be mapped onto two REs of the PRB as PTRS group 1. In some embodiments, PTRS ports in a CDM group can be determined by the index of the PTRS ports (e.g., the lower index of two PTRS ports is PTRS port group 0, and the higher index of two PTRS ports is PTRS port group 1). In some embodiments, PTRS ports in a CDM group can be determined by the association between DMRS ports and PTRS ports. If a PTRS is associated with a DMRS port in a CDM group, the two PTRS ports can be mapped onto an RE as a group. Each group of PTRS ports can be mapped onto a combined RE on an OFDM symbol, such as the first group on REs #0 and #2 and the second group on REs #5 and #7, as shown below. Figure 6 As shown.

[0101] Example 7

[0102] In some embodiments, the DMRS port is indicated based on the OCC length in the frequency domain. Specifically, different types of OCCs in the frequency domain can have a length of 2 or 4 (or other values). In the frequency domain, such as scheduling of PRBs or PRB groups, different types of OCCs can be used for a single DMRS port.

[0103] For DMRS type 1, a DMRS port is mapped to six REs in a PRB. If the FD-OCC length is 4, the 6 REs cannot be equally divided into 4 groups. Therefore, PRB binding can be used for scheduled PRBs / PRB groups / bandwidth portions (BWPs) to allow the same PMI to be applied to adjacent resource blocks, enabling PMI / RI reporting with the same granularity. The binding size can be an even number (e.g., 2, 4, etc.). PRBs can be bound from the lowest or highest PRB ID in each PRG or scheduled PRB. When binding a PRB from the lowest PRB ID, the last two REs of the CDM group in the highest PRB or PRB with the highest ID cannot be used for mapping a DMRS port with an FD-OCC of length 4. Therefore, an FD-OCC of length 2 can be used to map a DMRS port to the remaining PRBs without PRB binding.

[0104] For DMRS port mapping with an FD-OCC of length 4, 8 or 12 DMRS ports can be supported for single-symbol DMRS, and 16 or 24 DMRS ports can be supported for dual-symbol DMRS. If the DMRS port index is less than 4 for single-symbol DMRS, or less than 4 for dual-symbol DMRS, the DMRS port can be used as a traditional DMRS port in the PRB (e.g., with an FD-OCC of length 2) without PRB binding.

[0105] Some embodiments may preferably implement the following solutions. A set of preferred solutions may include the following (e.g., as described with reference to embodiments 1-7).

[0106] 1. A method for wireless communication, comprising: sending a signaling message from a base station to a terminal device, the signaling message indicating an association between more than four demodulation reference signal (DMRS) ports and at least two phase tracking reference signal (PTRS) ports, wherein the signaling message includes multiple sets of bits, each set corresponding to a PTRS port, and wherein each set includes one or more bits indicating a value corresponding to one of the more than four DMRS ports; and receiving a transmission from the terminal device by the base station according to the signaling message.

[0107] 2. A method for wireless communication, comprising: receiving a signaling message from a base station by a terminal device, the signaling message indicating an association between more than four demodulation reference signal (DMRS) ports and at least two phase tracking reference signal (PTRS) ports, wherein the signaling message includes multiple sets of bits, each set corresponding to a PTRS port, and wherein each set includes one or more bits indicating a value corresponding to one of the more than four DMRS ports; and performing a transmission to the base station by the terminal device based on the signaling message.

[0108] 3. The method according to solution 1 or 2, wherein the signaling message comprises two sets of bits, and each set comprises at least one of the following: two bits indicating an association between a PTRS port and one of up to four DMRS ports sharing the PTRS port; or one bit indicating an association between a PTRS port and one of the first two DMRS ports sharing the PTRS port.

[0109] 4. The method according to any one of solutions 1 to 3, wherein the signaling message comprises four groups of bits, and each group comprises one bit for indicating an association between a PTRS port and one of up to two DMRS ports sharing the one PTRS port.

[0110] 5. The method according to any one of solutions 1 to 4, wherein the signaling message is instructed for transmission from the terminal device to the base station, the transmission including at least one of partial coherent codebook-based transmission, non-coherent codebook-based transmission, or non-codebook-based transmission.

[0111] 6. A method for wireless communication, comprising: sending a signaling message from a base station to a terminal device, the signaling message including at least three bits indicating an association between more than four demodulation reference signal (DMRS) ports and a single phase tracking reference signal (PTRS) port; and receiving, by the base station, a transmission from the terminal device according to the signaling message.

[0112] 7. A method for wireless communication, comprising: receiving a signaling message from a base station by a terminal device, the signaling message including at least three bits indicating an association between more than four demodulation reference signal (DMRS) ports and a single phase tracking reference signal (PTRS) port; and performing a transmission to the base station according to the signaling message by the terminal device.

[0113] 8. The method according to solution 6 or 7, wherein the signaling message is used for transmission from the terminal device to the base station, the transmission including at least one of fully coherent codebook-based or non-codebook-based transmission.

[0114] 9. The method according to any one of solutions 1 to 8, wherein the association is indicated using a total of four bits in the signaling message.

[0115] 10. The method according to any one of solutions 1 to 8, wherein the association is indicated in the signaling message using a total of N bits, wherein N is at least one of the following: four bits for partially coherent, incoherent codebook-based uplink transmission or codebook-based uplink transmission; or three bits for fully coherent codebook-based uplink transmission.

[0116] 11. The method according to any one of solutions 1 to 10, wherein one PTRS port is associated with at least one other PTRS port in the frequency domain using code division multiplexing (CDM).

[0117] 12. The method according to solution 11, wherein the DMRS ports are organized into one or more CDM groups, and wherein the orthogonal cover code (OCC) in each CDM group includes at least one of the following: [1,1], [1,-1], [1,1,1,1], [1,1,-1,-1], [1,-1,1,-1] or [1,-1,-1,1].

[0118] 13. The method according to any one of solutions 1 to 12, wherein the signaling message is a downlink control information (DCI) message, and wherein a portion of the bits is represented using reserved bits in the DCI message.

[0119] 14. The method according to any one of solutions 1 to 13, wherein DMRS ports in the same code division multiplexing (CDM) group share at most one PTRS port.

[0120] 15. The method according to any one of solutions 1 to 14, wherein the resource element mapped to the PTRS is determined based on the association between the more than four DMRS ports and the at least two PTRS ports.

[0121] 16. The method according to solution 15, wherein the resource element is based on The mapping is performed where n is a non-negative integer, k' is equal to 0 or 1 according to the DMRS port index, and Δ is associated with the DMRS port index and the code division multiplexing (CMD) group index.

[0122] 17. The method according to solution 15, wherein the resource element mapped to the PTRS is based on parameters defined as follows. To determine:

[0123]

[0124] 18. The method according to solution 15, wherein the subcarrier to which the PTRS is mapped is based on parameters defined as follows To determine:

[0125]

[0126] 19. The method according to any one of solutions 1 to 18, wherein the PTRS is determined based on at least one of the following: the number of DMRS ports sharing a PTRS port, the number of PTRS ports, or the number of PTRS ports sharing the same antenna port for data transmission from the terminal device to the base station.

[0127] 20. The method according to solution 19, wherein the power ratio is determined according to a rule, wherein the rule is associated with the coherence type of each transmission group of the DMRS port sharing the PTRS port, wherein the rule includes at least one of the following:

[0128] (1) The power ratio of non-coherent or non-codebook-based transmissions is determined to be 10 × log (number of PTRS ports);

[0129] (2) The power ratio of fully coherent transmission is determined based on the total number of DMRS ports corresponding to all PTRS ports, and the power ratio is expressed as 10×log(number of DMRS ports);

[0130] (3) The power ratio mentioned therein is based on 10×log(Q DMRS )+3*Q p -3 is used to determine where Q DMRS This indicates the number of DMRS ports sharing a single PTRS port, where the number of PTRS ports is represented as Qp; or

[0131] (4) The power ratio mentioned therein is based on 10×log(Q DMRS ) to determine, where Q DMRS This indicates the total number of counted DMRS ports, where the counted DMRS ports in each group share the same SRS port as the associated PTRS port.

[0132] 21. The method according to solution 19, wherein the number of PTRS ports is represented by Q. pAnd the power therein is defined as follows:

[0133]

[0134] 22. The method according to solution 19, wherein the number of PTRS ports is represented by Q. p And the power therein is defined as follows:

[0135]

[0136] 23. The method according to any one of solutions 1 to 22, wherein the signaling message includes at least one of the following: four bits in the PTRS-DMRS association field; or two bits in the PTRS-DMRS association field and two bits in the reserved field or antenna port indication field.

[0137] 24. The method according to any one of solutions 1 to 23, wherein more than 4 of a total of up to 24 DMRS ports are indicated in the signaling message.

[0138] 25. The method according to any one of solutions 1 to 24, wherein the DMRS port is configured for a DMRS sequence in a single symbol.

[0139] 26. A communication device comprising a processor configured to implement the method according to any one or more of solutions 1 to 25.

[0140] 27. A computer program product having code stored thereon, which, when executed by a processor, causes the processor to implement the method according to any one or more of solutions 1 to 25.

[0141] Figure 7An example of a wireless communication system 700 in which one or more embodiments of the present technology can be applied is shown. The wireless communication system 700 may include one or more base stations (BS) 705a, 705b, one or more wireless devices (or UEs) 710a, 710b, 710c, 710d, and a core network 725. Base stations 705a, 705b may provide wireless services to user equipment 710a, 710b, 710c, and 710d in one or more wireless sectors. In some implementations, base stations 705a, 705b include directional antennas for generating two or more directional beams to provide wireless coverage in different sectors. The core network 725 may communicate with one or more base stations 705a, 705b. The core network 725 provides connectivity to other wireless communication systems and wired communication systems. The core network may include one or more service subscription databases for storing information related to subscribed user equipment 710a, 710b, 710c, and 710d. The first base station 705a can provide wireless services based on a first radio access technology, while the second base station 705b can provide wireless services based on a second radio access technology. Depending on the deployment scenario, base stations 705a and 705b can be located in the same location or can be installed separately in the field. User equipment 710a, 710b, 710c, and 710d can support multiple different radio access technologies. The technologies and embodiments described in this document can be implemented by the base stations of the wireless devices described in this document.

[0142] Figure 8 This is a block diagram representation of a portion of a radio station according to one or more embodiments to which the present technology may be applied. Radio station 805, such as a network node, base station, or wireless device (or user equipment UE), may include processor electronics 810, such as a microprocessor, which implements one or more of the wireless technologies proposed in this document. Radio station 805 may include transceiver electronics 815 for transmitting and / or receiving wireless signals through one or more communication interfaces, such as antenna 820. Radio station 805 may include other communication interfaces for transmitting and receiving data. Radio station 805 may include one or more memories (not explicitly shown) configured to store information such as data and / or instructions. In some implementations, processor electronics 810 may include at least a portion of transceiver electronics 815. In some embodiments, at least some of the disclosed technologies, modules, or functions are implemented using radio station 805. In some embodiments, radio station 805 may be configured to perform the methods described herein.

[0143] It should be understood that this document discloses techniques that can be embodied in various embodiments to facilitate efficient scheduling of split transmission schemes, where, for TDD systems, the base station performs full-duplex transmission and the UE performs half-duplex transmission. The disclosures and other embodiments, modules, and functional operations described in this document can be implemented in digital electronic circuit systems, or in computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or in combinations thereof. The disclosed embodiments and other embodiments can be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer-readable medium for execution by or control of the operation of a data processing device. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of material affecting machine-readable propagation signals, or a combination thereof. The term "data processing apparatus" covers all means, devices, and machines for processing data, including, for example, a programmable processor, a computer, or multiple processors or computers. In addition to hardware, the device may also include code that creates an execution environment for the computer program in question, such as code constituting processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of these. The propagating signal is an artificially generated signal, such as a machine-generated electrical, optical, or electromagnetic signal, which is generated to encode information for transmission to a suitable receiver device.

[0144] Computer programs (also known as programs, software, software applications, scripts, or code) can be written in any form of programming language, including compiled or interpreted languages, and can be deployed in any way, including as standalone programs or as modules, components, subroutines, or other units suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored as a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), as a single file dedicated to the program in question, or as multiple coordinating files (e.g., a file storing one or more code modules, subroutines, or sections). Computer programs can be deployed to execute on one or more computers located at a single site or distributed across multiple sites and interconnected via a communications network.

[0145] The processes and logical flows described in this document can be executed by one or more programmable processors that execute one or more computer programs to perform functions by manipulating input data and generating output. The processes and logical flows can also be executed by special-purpose logic circuit systems, and the devices can be implemented as special-purpose logic circuit systems, such as FPGAs (Field-Programmable Gate Arrays) or ASICs (Application-Specific Integrated Circuits). For example, processors suitable for executing computer programs include general-purpose and special-purpose microprocessors, and any one or more processors of any type of digital computer. Typically, the processor receives instructions and data from read-only memory or random access memory, or both. The basic elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Typically, a computer will also include one or more mass storage devices for storing data, such as magnetic disks, magneto-optical disks, or optical disks, or be operatively coupled to such mass storage devices to receive data from or send data to or both. However, a computer does not necessarily have such devices. Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory devices, including, for example, semiconductor memory devices such as EPROM, EEPROM, and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magneto-optical disks; and CD-ROMs and DVD-ROMs. Processors and memory may be supplemented by or incorporated into dedicated logic circuitry systems.

[0146] While this patent document contains numerous details, these details should not be construed as limiting the scope of any invention or claimable content, but rather as descriptions of features specific to particular embodiments of a particular invention. Certain features described in this patent document within the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments. Furthermore, although features may be described above as functioning in certain combinations, and even initially claimed in this way, in some cases one or more features from a claimed combination may be excluded from that combination, and the claimed combination may involve sub-combinations or variations thereof.

[0147] Similarly, although the operations are described in a specific order in the figures, this should not be construed as requiring such operations to be performed in the specific order shown or sequentially, or requiring all the shown operations to be performed to obtain the desired result. Furthermore, the separation of various system components in the embodiments described in this patent document should not be construed as requiring such separation in all embodiments.

[0148] Only a few implementations and examples are described, and other implementations, enhancements and variations can be made based on what is described and illustrated in this patent document.

Claims

1. A method for wireless communication, comprising: transmitting, by a base station to a terminal device, a downlink control information, DCI, signaling message, wherein the DCI signaling message comprises four bits indicating an association between eight demodulation reference signal, DMRS, ports and two or more phase tracking reference signal, PTRS, ports for a partial-coherent or non-coherent codebook-based transmission, wherein the four bits comprise two groups of bits, wherein each group corresponds to one PTRS port and a respective subset of four DMRS ports, and wherein each group comprises two bits indicating a value corresponding to one of the respective subset of four DMRS ports sharing the PTRS port, wherein a first group of two bits has a value of 0 indicating a first DMRS port in a first subset of DMRS ports is associated with PTRS port 0, wherein the first group of two bits has a value of 1 indicating a second DMRS port in the first subset of DMRS ports is associated with PTRS port 0, wherein the first group of two bits has a value of 2 indicating a third DMRS port in the first subset of DMRS ports is associated with PTRS port 0, wherein the first group of two bits has a value of 3 indicating a fourth DMRS port in the first subset of DMRS ports is associated with PTRS port 0, wherein a second group of two bits has a value of 0 indicating a first DMRS port in a second subset of DMRS ports is associated with PTRS port 1, wherein the second group of two bits has a value of 1 indicating a second DMRS port in the second subset of DMRS ports is associated with PTRS port 1, wherein the second group of two bits has a value of 2 indicating a third DMRS port in the second subset of DMRS ports is associated with PTRS port 1, and wherein the second group of two bits has a value of 3 indicating a fourth DMRS port in the second subset of DMRS ports is associated with PTRS port 1; and receiving, by the base station from the terminal device, the partial-coherent or non-coherent codebook-based transmission in accordance with the DCI signaling message.

2. The method of claim 1, wherein the first subset of DMRS ports share coherent SRS ports {0, 4, 1, 5} and share PTRS port 0, and wherein the second subset of DMRS ports share coherent SRS ports {2, 6, 3, 7} and share PTRS port 1.

3. The method of claim 1, wherein a power per layer per resource element for PTRS for a physical uplink shared channel, PUSCH, is determined according to a rule, wherein the rule is associated with a coherence type of each DMRS port transmission group sharing the PTRS port, wherein the rule provides that a power ratio for non-coherent or non-codebook based transmission is determined as and wherein a number of PTRS ports is denoted as Qp. 4.The method of claim 1, wherein a power per resource element per layer for PTRS for a physical uplink shared channel (PUSCH) is determined according to and wherein Q DMRS denotes a number of DMRS ports sharing one PTRS port, and wherein a number of PTRS ports is denoted as Q p.

5. A method for wireless communication, comprising: receiving, by a terminal device from a base station, a downlink control information, DCI, signaling message, wherein the DCI signaling message comprises four bits indicating an association between eight demodulation reference signal, DMRS, ports and two or more phase tracking reference signal, PTRS, ports for a partial-coherent or non-coherent codebook-based transmission, wherein the four bits comprise two groups of bits, wherein each group corresponds to one PTRS port and a respective subset of four DMRS ports, and wherein each group comprises two bits indicating a value corresponding to one of the respective subset of four DMRS ports sharing the PTRS port, wherein a first group of two bits has a value of 0 indicating a first DMRS port in a first subset of DMRS ports is associated with PTRS port 0, wherein the first group of two bits has a value of 1 indicating a second DMRS port in the first subset of DMRS ports is associated with PTRS port 0, wherein the first group of two bits has a value of 2 indicating a third DMRS port in the first subset of DMRS ports is associated with PTRS port 0, wherein the first group of two bits has a value of 3 indicating a fourth DMRS port in the first subset of DMRS ports is associated with PTRS port 0, wherein a second group of two bits has a value of 0 indicating a first DMRS port in a second subset of DMRS ports is associated with PTRS port 1, wherein the second group of two bits has a value of 1 indicating a second DMRS port in the second subset of DMRS ports is associated with PTRS port 1, wherein the second group of two bits has a value of 2 indicating a third DMRS port in the second subset of DMRS ports is associated with PTRS port 1, and wherein the second group of two bits has a value of 3 indicating a fourth DMRS port in the second subset of DMRS ports is associated with PTRS port 1; and performing, by the terminal device, the partial-coherent or non-coherent codebook-based transmission to the base station in accordance with the DCI signaling message.

6. The method of claim 5, wherein the first subset of DMRS ports share coherent SRS ports {0, 4, 1, 5} and share PTRS port 0, and wherein the second subset of DMRS ports share coherent SRS ports {2, 6, 3, 7} and share PTRS port 1.

7. The method of claim 5, wherein a power per layer per resource element for PTRS for a physical uplink shared channel, PUSCH, is determined according to a rule, wherein the rule is associated with a coherence type of each DMRS port transmission group sharing the PTRS port, wherein the rule provides that a power ratio for non-coherent or non-codebook based transmission is determined as and wherein a number of PTRS ports is denoted as Qp.

8. The method of claim 5, wherein a power per resource element per layer for PTRS for a physical uplink shared channel (PUSCH) is determined according to and wherein Q DMRS represents a number of DMRS ports sharing one PTRS port, and wherein a number of PTRS ports is denoted as Qp.

9. A communication apparatus comprising at least one processor configured to: transmitting a downlink control information, DCI, signaling message to a terminal device, wherein the DCI signaling message comprises four bits indicating an association between eight demodulation reference signal, DMRS, ports and two or more phase tracking reference signal, PTRS, ports for a partial-coherent or non-coherent codebook-based transmission, wherein the four bits comprise two groups of bits, wherein each group corresponds to one PTRS port and a respective subset of four DMRS ports, and wherein each group comprises two bits indicating a value corresponding to one of the respective subset of four DMRS ports sharing the PTRS port, wherein a first group of two bits has a value of 0 indicating a first DMRS port in a first subset of DMRS ports is associated with PTRS port 0, wherein the first group of two bits has a value of 1 indicating a second DMRS port in the first subset of DMRS ports is associated with PTRS port 0, wherein the first group of two bits has a value of 2 indicating a third DMRS port in the first subset of DMRS ports is associated with PTRS port 0, wherein the first group of two bits has a value of 3 indicating a fourth DMRS port in the first subset of DMRS ports is associated with PTRS port 0, wherein a second group of two bits has a value of 0 indicating a first DMRS port in a second subset of DMRS ports is associated with PTRS port 1, wherein the second group of two bits has a value of 1 indicating a second DMRS port in the second subset of DMRS ports is associated with PTRS port 1, wherein the second group of two bits has a value of 2 indicating a third DMRS port in the second subset of DMRS ports is associated with PTRS port 1, and wherein the second group of two bits has a value of 3 indicating a fourth DMRS port in the second subset of DMRS ports is associated with PTRS port 1; and receiving the partial-coherent or non-coherent codebook-based transmission from the terminal device in accordance with the DCI signaling message.

10. The communication apparatus of claim 9, wherein the first subset of DMRS ports share coherent SRS ports {0, 4, 1, 5} and share PTRS port 0, and wherein the second subset of DMRS ports share coherent SRS ports {2, 6, 3, 7} and share PTRS port 1.

11. The communication apparatus of claim 9, wherein the power ratio per layer per resource element for the Physical Uplink Shared Channel (PUSCH) for the Physical Uplink is determined according to a rule, wherein the rule is associated with the coherence type of each DMRS port transmission group sharing the PTRS port, wherein the rule specifies that the power ratio for incoherent or non-codebook-based transmissions is determined as follows: And the number of PTRS ports is represented as Qp.

12. The communication apparatus according to claim 9, wherein a power per resource element per layer for PTRS for a physical uplink shared channel (PUSCH) is determined according to and wherein Q DMRS denotes a number of DMRS ports sharing one PTRS port, and wherein a number of PTRS ports is denoted as Qp.

13. A communication apparatus comprising at least one processor configured to: receiving a downlink control information, DCI, signaling message from a base station, wherein the DCI signaling message includes four bits indicating an association between eight demodulation reference signal, DMRS, ports and two or more phase tracking reference signal, PTRS, ports for partial-coherent or non-coherent codebook-based transmission, wherein the four bits include two groups of bits, wherein each group corresponds to one PTRS port and a respective subset of four DMRS ports, and wherein each group includes two bits indicating a value corresponding to one of the respective subset of four DMRS ports sharing the PTRS port, wherein a first group of two bits has a value of 0 indicating a first DMRS port in a first subset of DMRS ports is associated with PTRS port 0, wherein the first group of two bits has a value of 1 indicating a second DMRS port in the first subset of DMRS ports is associated with PTRS port 0, wherein the first group of two bits has a value of 2 indicating a third DMRS port in the first subset of DMRS ports is associated with PTRS port 0, wherein the first group of two bits has a value of 3 indicating a fourth DMRS port in the first subset of DMRS ports is associated with PTRS port 0, wherein a second group of two bits has a value of 0 indicating a first DMRS port in a second subset of DMRS ports is associated with PTRS port 1, wherein the second group of two bits has a value of 1 indicating a second DMRS port in the second subset of DMRS ports is associated with PTRS port 1, wherein the second group of two bits has a value of 2 indicating a third DMRS port in the second subset of DMRS ports is associated with PTRS port 1, and wherein the second group of two bits has a value of 3 indicating a fourth DMRS port in the second subset of DMRS ports is associated with PTRS port 1; and performing the partial-coherent or non-coherent codebook-based transmission to the base station in accordance with the DCI signaling message.

14. The communication apparatus of claim 13, wherein the first subset of DMRS ports share coherent SRS port sharing PTRS port 0, and wherein the second subset of DMRS ports share coherent SRS ports {2, 6, 3, 7} and share PTRS port 1.

15. The communication apparatus of claim 13, wherein the power ratio per layer per resource element for the Physical Uplink Shared Channel (PUSCH) for the Physical Uplink is determined according to a rule, wherein the rule is associated with the coherence type of each DMRS port transmission group sharing the PTRS port, wherein the rule specifies that the power ratio for incoherent or non-codebook-based transmissions is determined as follows: And the number of PTRS ports is represented as Qp.

16. The communication apparatus of claim 13, wherein a power per resource element per layer for PTRS for a physical uplink shared channel (PUSCH) is determined according to and wherein Q DMRS denotes a number of DMRS ports sharing one PTRS port, and wherein a number of PTRS ports is denoted as Qp.

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