CN110198547B - Layer index reporting method, terminal and base station - Google Patents

Abstract

The embodiment of the invention provides a layer index reporting method, a terminal and a base station, wherein the method comprises the following steps: determining N LI according to the configured PTRS port number of the terminal, wherein N is the PTRS port number, and N is greater than or equal to 1; reporting the N LI, wherein the N LI are indexes of N downlink transmission layers; under the condition that the N is equal to 1, the N downlink transmission layers are the downlink transmission layers with the best channel condition in all the downlink transmission layers corresponding to the DMRS ports in the M demodulation reference signal DMRS port groups; and under the condition that the N is greater than 1, the N downlink transmission layers are downlink transmission layers with the best channel condition in each downlink transmission layer set in M downlink transmission layer sets, and the M downlink transmission layer sets respectively correspond to the M DMRS port groups. The embodiment of the invention can improve the estimation precision of the phase noise.

Description

Layer index reporting method, terminal and base station

technical field

The present invention relates to the field of communication technologies, and in particular to a layer index (layer index, LI) reporting method, a terminal and a base station.

Background technique

In the future-oriented fifth generation ( ^5th generation, 5G) communication system, in order to achieve the target of 20Gbps downlink transmission rate and 10Gbps uplink transmission rate, the combination of high frequency transmission technology and large-scale antenna array technology is the general trend. In addition, in order to improve the effectiveness of transmission, high-order modulation is often used, such as 16 quadrature amplitude modulation (Quadrature Amplitude Modulation, QAM), 64QAM or 256QAM, and the like. Therefore, high-order modulation is often easily affected by phase noise, and the higher the modulation order is, the more sensitive it is to phase noise. To make matters worse, the higher the operating frequency, the greater the phase noise. Therefore, for high-frequency transmission, in order to remove phase noise, the transmitter needs to send a known reference signal to the receiver, that is, a phase tracking reference signal (Phase Tracking Reference Signal, PTRS), and the receiver can measure the phase noise based on it. Estimated and then correspondingly phase compensated to remove phase noise.

In addition, in practical applications, there are multiple demodulation reference signal (demodulation reference signal, DMRS) ports that are quasi-co-located (QCL), so the phase noise of the corresponding data streams of these DMRS ports is the same so that these DMRS ports can share one PTRS port. Therefore, in the actual transmission process, it is only necessary to map the PTRS to a certain DMRS port. According to the progress of current communication standardization, the base station maps the PTRS to the DMRS port with the best channel conditions. However, how the base station determines the DMRS port with the best channel conditions is still inconclusive. It can be seen that how to determine the DMRS port with the best channel condition to improve the estimation accuracy of the phase noise is a technical problem that needs to be solved urgently.

Contents of the invention

Embodiments of the present invention provide an LI reporting method, a terminal and a base station to solve the problem of how the base station determines the DMRS port with the best channel condition to improve the estimation accuracy of phase noise.

In order to solve the above technical problems, the present invention is implemented as follows: a method for reporting a layer index LI, applied to a terminal, including:

Determine N LIs according to the number of PTRS ports configured on the terminal, where N is the number of PTRS ports, and N is greater than or equal to 1;

Reporting the N LIs to the base station, where the N LIs are indexes of N downlink transmission layers;

Wherein, in the case where the N is equal to 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition among all the downlink transmission layers corresponding to the DMRS ports in the M DMRS port groups, wherein the The terminal has the M DMRS port groups, and M is an integer greater than or equal to 1;

In the case where the N is greater than 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition in each of the M downlink transmission layer sets, and the M downlink transmission layer sets Corresponding to the M DMRS port groups respectively.

In the first aspect, the embodiment of the present invention also provides a method for reporting a layer index LI, which is applied to a terminal, including:

Determine N LIs according to the number of PTRS ports configured on the terminal, where N is the number of PTRS ports, and N is greater than or equal to 1;

Reporting the N LIs to the base station, where the N LIs are indexes of N downlink transmission layers;

Wherein, in the case where the N is equal to 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition among all the downlink transmission layers corresponding to the DMRS ports in the M DMRS port groups, wherein the The terminal has the M DMRS port groups, and M is an integer greater than or equal to 1;

In the case where the N is greater than 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition in each of the M downlink transmission layer sets, and the M downlink transmission layer sets Corresponding to the M DMRS port groups respectively.

In a second aspect, an embodiment of the present invention provides a method for reporting LI, which is applied to a base station, including:

Receiving N LIs reported by the terminal, where the N LIs are indexes of N downlink transport layers, N is the number of PTRS ports configured by the terminal, and N is greater than or equal to 1;

Determine N DMRS ports corresponding to the N downlink transport layers according to the N LIs;

Wherein, in the case where the N is equal to 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition among all the downlink transmission layers corresponding to the DMRS ports in the M DMRS port groups, wherein the The terminal has the M DMRS port groups, and M is an integer greater than or equal to 1;

In the case where the N is greater than 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition in each of the M downlink transmission layer sets, and the M downlink transmission layer sets Corresponding to the M DMRS port groups respectively.

In a third aspect, an embodiment of the present invention provides a terminal, including:

A determining module, configured to determine N LIs according to the number of PTRS ports configured on the terminal, where N is the number of PTRS ports, and N is greater than or equal to 1;

A reporting module, configured to report the N LIs to the base station, where the N LIs are indexes of N downlink transmission layers;

Wherein, in the case where the N is equal to 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition among all the downlink transmission layers corresponding to the DMRS ports in the M DMRS port groups, wherein the The terminal has the M DMRS port groups, and M is an integer greater than or equal to 1;

In the case where the N is greater than 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition in each of the M downlink transmission layer sets, and the M downlink transmission layer sets Corresponding to the M DMRS port groups respectively.

In a fourth aspect, an embodiment of the present invention provides a base station, including:

The receiving module is configured to receive N LIs reported by the terminal, where the N LIs are indexes of N downlink transport layers, N is the number of PTRS ports configured by the terminal, and N is greater than or equal to 1;

A determining module, configured to determine N DMRS ports corresponding to the N downlink transport layers according to the N LIs;

Wherein, in the case where the N is equal to 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition among all the downlink transmission layers corresponding to the DMRS ports in the M DMRS port groups, wherein the The terminal has the M DMRS port groups, and M is an integer greater than or equal to 1;

In the case where the N is greater than 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition in each of the M downlink transmission layer sets, and the M downlink transmission layer sets Corresponding to the M DMRS port groups respectively.

In the fifth aspect, an embodiment of the present invention provides a terminal, including: a memory, a processor, and a computer program stored in the memory and operable on the processor, when the computer program is executed by the processor The steps in the LI reporting method at the terminal side provided by the embodiment of the present invention are realized.

In a sixth aspect, an embodiment of the present invention provides a base station, which is characterized by comprising: a memory, a processor, and a computer program stored in the memory and operable on the processor, the computer program being executed by the The processor implements the steps in the LI reporting method at the base station side provided by the embodiment of the present invention when executing.

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the terminal-side LI provided by the embodiment of the present invention is implemented. The steps of the reporting method, or, when the computer program is executed by the processor, implement the steps of the LI reporting method at the base station side provided by the embodiment of the present invention.

In the embodiments of the present invention, the estimation accuracy of phase noise can be improved.

Description of drawings

FIG. 1 is a structural diagram of a network system to which an embodiment of the present invention is applicable;

FIG. 2 is a flowchart of a LI reporting method provided by an embodiment of the present invention;

FIG. 3 is a flowchart of another LI reporting method provided by an embodiment of the present invention;

FIG. 4 is a flow chart of another LI reporting method provided by an embodiment of the present invention;

FIG. 5 is a structural diagram of a terminal provided by an embodiment of the present invention;

FIG. 6 is a structural diagram of a base station provided by an embodiment of the present invention;

FIG. 7 is a structural diagram of another terminal provided by an embodiment of the present invention;

Fig. 8 is a structural diagram of another base station provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Please refer to FIG. 1 . FIG. 1 is a structural diagram of a network system applicable to an embodiment of the present invention. As shown in FIG. 1 , it includes a terminal 11 and a base station 12 . Wherein, the terminal 11 may also be called a terminal device or a user terminal (User Equipment, UE), and the terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a personal digital assistant (Personal Digital Assistant, PDA), mobile Internet device (MobileInternet Device, MID), wearable device (Wearable Device) or vehicle-mounted device and other terminal-side devices. It should be noted that the specific type of terminal 11 is not limited in the embodiment of the present invention. The above-mentioned base station 12 can be a base station of 5G and later versions (for example: gNB, 5G NR NB), or a base station in other communication systems, or called Node B, evolved Node B, or other vocabulary in the field, as long as it reaches With the same technical effect, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present invention, only a 5G base station is taken as an example, but the specific type of the base station 12 is not limited.

It should be noted that the specific functions of the terminal 11 and the base station 12 in the embodiment of the present invention will be specifically described through the following multiple embodiments.

Please refer to FIG. 2. FIG. 2 is a flowchart of a LI reporting method provided by an embodiment of the present invention. The method is applied to a terminal, as shown in FIG. 2, and includes the following steps:

Step 201: Determine N LIs according to the number of PTRS ports configured on the terminal, where N is the number of PTRS ports, and N is greater than or equal to 1.

Wherein, the number of PTRS ports configured for the terminal may be the PTRS port configured for the terminal by the network side, or the number of PTRS ports defined in the protocol, and the number of PTRS ports is greater than or equal to 1. In addition, the above-mentioned number of PTRS ports may be referred to as the maximum number of PTRS ports configured for the above-mentioned terminal. For example: the maximum number of PTRS ports configured on the terminal is 1, or 2, and so on.

In addition, in the embodiment of the present invention, LI is the index of the downlink transmission layer, and the downlink transmission layer is in one-to-one correspondence with the DMRS port, that is, the terminal determines a downlink transmission layer and feeds back the corresponding layer index to its serving base station, then Based on this, the base station can determine its corresponding DMRS port.

The determination of N LIs in step 201 may be determining the same number of LIs as the number of PTRS ports, that is, the number of reported LIs is the same as the number of PTRS ports. For example: if the maximum PTRS port configured by the terminal is 1, then it is determined that the number of LI fed back is 1, that is, 1 LI, and this LI is all downlink transmission layers (the corresponding DMRS ports can be distributed in one or more DMRS In the port group), the LI of the downlink transmission layer with the best channel condition; another example: if the maximum PTRS port configured by the terminal is 2, then the number of LIs to be fed back is determined to be 2, that is, 2 LIs, and these 2 LIs are respectively is the LI of the downlink transmission layer with the best channel condition among the downlink transmission layers corresponding to the DMRS ports in the two DMRS port groups.

Step 202: Report the N LIs to the base station, where the N LIs are indexes of N downlink transmission layers;

Wherein, in the case where the N is equal to 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition among all the downlink transmission layers corresponding to the DMRS ports in the M DMRS port groups, wherein the The terminal has the M DMRS port groups, and M is an integer greater than or equal to 1;

In the case where the N is greater than 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition in each of the M downlink transmission layer sets, and the M downlink transmission layer sets Corresponding to the M DMRS port groups respectively.

Wherein, the existence of the M DMRS port groups in the above-mentioned terminal may be understood as that the above-mentioned M DMRS port groups are all DMRS port groups of the terminal.

In addition, the aforementioned reporting of the N LIs to the base station may be reported through channel state information (channel state information, CSI), or reported through other uplink messages, which is not limited.

In the embodiment of the present invention, the DMRS ports in the same DMRS port group are QCL, and different DMRS port groups may not be QCL. And each DMRS port group may include one or more DMRS ports. Since the DMRS ports correspond to the downlink transmission layers one by one, the number of downlink transmission layers corresponding to the DMRS ports in the M DMRS port groups is the same as the number of DMRS ports included in the M DMRS port groups. In addition, the set of downlink transport layers corresponding to the DMRS port group may be a set of downlink transport layers corresponding to all DMRS ports in the DMRS port group. For example: M=2, the first DMRS port group includes 5 DMRS ports, these 5 DMRS ports are QCL, the second DMRS port group includes another 6 DMRS ports, these 6 DMRS ports are QCL, the first The first downlink transport layer set corresponding to each DMRS port group is the 5 downlink transport layers corresponding to the 5 DMRS ports respectively, and the second downlink transport layer set corresponding to the second DMRS port group is respectively the 6 DMRS The 6 downlink transmission layers corresponding to the ports, and all the downlink transmission layers corresponding to the DMRS ports in the above M DMRS port groups are the 11 downlink transmission layers.

Through the above steps, it can be realized that in the case where the above N is 1, the above N downlink transmission layers are the one with the best channel condition among all the downlink transmission layers corresponding to the DMRS ports in the above M DMRS port groups ; In the case where the above-mentioned N is 2, the above-mentioned N downlink transport layers are the downlink transport layers with the best channel conditions in each set of downlink transport layers in the two sets of downlink transport layers corresponding to the above-mentioned two DMRS port groups. For example: the downlink transport layer with the best channel condition in the downlink transport layer corresponding to the DMRS port in the first DMRS port group is downlink transport layer a, and the channel condition in the downlink transport layer corresponding to the DMRS port in the second DMRS port group The best downlink transmission layer is downlink transmission layer b, and the above two LIs are the LIs of downlink transmission layer a and downlink transmission layer b respectively.

It should be noted that, in the embodiment of the present invention, the downlink transmission layer with the best channel condition may also be called the strongest downlink transmission layer. In addition, the channel condition may be a condition for evaluating channel quality, such as: channel reception quality, channel interference level, channel signal-to-noise ratio, or channel transmission performance, etc., which is not limited in this embodiment of the present invention.

Since when N is equal to 1, the above N downlink transmission layers are the downlink transmission layers with the best channel conditions among all the downlink transmission layers corresponding to the DMRS ports in the M DMRS port groups of the terminal, so that the base station receives After the 1 LI, a corresponding DMRS port can be determined, that is, a DMRS port with the best channel condition among the M DMRS port groups can be determined. Since when N is greater than 1, the above N downlink transmission layers are the downlink transmission layers with the best channel conditions in each of the M downlink transmission layer sets, so that after receiving the N L1s, the base station , the DMRS port with the best channel condition in each DMRS port group can be determined. Afterwards, the PTRS can be mapped on the N DMRS ports, thereby improving the estimation accuracy of the PTRS phase noise and improving the reliability of transmission. For example: for single codeword transmission, when the above-mentioned N is equal to 1, the base station determines the DMRS port with the best channel condition, so that the DMRS port can be arranged on the DMRS port with the smallest port number, and then the DMRS port with the smallest port number is to map PTRS; another example: for dual-codeword transmission, when the above-mentioned N is equal to 1, the base station determines the DMRS port with the best channel condition, so that the DMRS port can be arranged to a higher modulation coding scheme (modulation coding scheme, MCS) Among the DMRS ports corresponding to the higher code word, the DMRS port with the smallest port number is mapped to the PTRS on the DMRS port with the smallest port number.

In the embodiment of the present invention, the foregoing base station may be a serving base station of the foregoing terminal.

It should be noted that the above method provided in the embodiment of the present invention can be applied to the 5G system, but there is no limitation on this, as long as it can realize basically the same function, it is applicable to other communication systems, for example: 6G system or other application LI can be applied Reported communication systems, etc.

The embodiment of the present invention can improve the estimation accuracy of phase noise and improve the reliability of transmission.

Please refer to FIG. 3. FIG. 3 is a flow chart of another LI reporting method provided by an embodiment of the present invention. The method is applied to a terminal, as shown in FIG. 3, and includes the following steps:

Step 301: Determine N LIs according to the number of PTRS ports configured on the terminal, where N is the number of PTRS ports, and N is greater than or equal to 1.

Wherein, this step may first determine the number of LIs to be fed back according to the number of PTRS ports, and then determine the specific LI. For example: according to the configured maximum PTRS port of the terminal, the number of LIs to be fed back is determined to be 1, and the LI of the downlink transmission layer with the best channel conditions is determined.

Step 302: Report the N LIs to the base station, where the N LIs are indexes of N downlink transmission layers;

Wherein, in the case where the N is equal to 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition among all the downlink transmission layers corresponding to the DMRS ports in the M demodulation reference signal DMRS port groups, Wherein, the terminal has the M DMRS port groups, and M is an integer greater than or equal to 1;

In the case where the N is greater than 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition in each of the M downlink transmission layer sets, and the M downlink transmission layer sets Corresponding to the M DMRS port groups respectively.

As an optional implementation manner, the number of PTRS ports is 1, and N is determined to be 1; or

The number of PTRS ports is 2, and N is determined to be 2.

In this embodiment, if the number of PTRS ports configured by the terminal is 1, then it is determined to feed back 1 LI, and this LI is the index of the downlink transmission layer with the best channel condition in all downlink transmission layers, so that the base station can The strongest layer in the downlink transmission layer is known, and the PTRS is mapped to the DMRS port corresponding to the strongest layer. Therefore, the estimation accuracy of the phase noise is ensured, and the reliability of transmission is improved.

In this embodiment, it can also be realized that the number of PTRS ports configured by the terminal is 2, then it is determined to feed back 2 LIs, and these 2 LIs can be respectively the channel conditions in the 2 downlink transport layer sets corresponding to the 2 DMRS port groups. A good index of the downlink transmission layer can further enable the base station to know the DMRS port with the best channel condition in each DMRS port group of the two DMRS port groups, and map the PTRS to the two DMRS ports respectively. Therefore, the estimation accuracy of the phase noise is guaranteed, and the reliability of the transmission is improved.

Optionally, in this embodiment, the above M is 1 or 2. In this way, when the number of PTRS ports (or the maximum number of PTRS ports) configured for a terminal is 1, and the number of DMRS port groups is 1 or 2, the terminal reports only one LI to the base station. Therefore, the estimation accuracy of the phase noise is guaranteed, the reliability of transmission is improved, and signaling overhead can also be saved. Of course, M being 1 or 2 is only a preferred implementation manner, which is not limited, for example, M may also be 3 or 4 and other integers.

Optionally, in the above implementation manner, the terminal reports the N LIs to the base station through a CSI, where the CSI includes an LI field, and the LI field is used to indicate the N LIs.

For example: the terminal reports the above CSI to the base station, and the CSI includes the above LI field, so that the above N LIs are reported to the base station through the CSI.

In this embodiment, since the reporting is performed through the CSI, no additional message is needed to save overhead.

其中，N₁和N₂分别为所述2个DMRS端口组中所包含的DMRS端口数目，所述LI域中

个比特用于指示所述信道条件最好的下行传输层索引，

为上取整操作符。Optionally, in an implementation manner, when the N is 1 and the M is 2, the number of bits in the LI field is

Wherein, N ₁ and N ₂ are respectively the DMRS port numbers contained in the two DMRS port groups, and in the LI domain

bits are used to indicate the downlink transport layer index with the best channel condition,

is the upper integer operator.

For example: the above two DMRS port groups include a first DMRS port group and a second DMRS port group, wherein the first DMRS port group contains 7 DMRS ports, and the second DMRS port group contains 8 DMRS ports, that is, The aforementioned N ₁ and N ₂ are 7 and 8 respectively, so the number of bits in the aforementioned LI field is 4, and 4 bits are used to indicate the index of the downlink transport layer with the best channel condition.

In this embodiment, in the case of including two DMRS port groups, a small number of bits can be used to indicate the downlink transmission layer with the best channel condition, thereby saving signaling overhead.

的情况下，所述M个DMRS端口组中的DMRS端口的端口索引按照升序排列，所述LI域指示的LI按照升序排列。Optionally, the number of bits in the LI field is

In the case of , the port indexes of the DMRS ports in the M DMRS port groups are arranged in ascending order, and the LI indicated by the LI field is arranged in ascending order.

对应的LI值分别为

其中，第一个式子表示存在为

个0，第二个式子表示存在

个0，另一比特为1，第三个式子表示存在

个0，另2比特为10，第四个式子表示存在为

个1。For example: arrange the N ₁ +N ₂ DMRS ports (denoted as p _i , i= ₁ , ₂ , .

The corresponding LI values are

Among them, the first formula expresses the existence of

0, the second expression indicates the existence of

One bit is 0, another bit is 1, and the third formula indicates the existence of

0, the other 2 bits are 10, the fourth formula means that there is

a 1.

Therefore, the corresponding relationship between the DMRS port index and the LI corresponding to the downlink transmission layer with the best channel condition (abbreviation: the strongest layer) is shown in Table 1.

Table 1:

In this embodiment, since the port indexes of the DMRS ports in the M DMRS port groups are arranged in ascending order, the LI indicated by the LI field is also arranged in ascending order, so that the LI reported by the terminal can be positively correlated with the index of the corresponding DMRS port, or The two are the same, so that the base station can directly determine the corresponding DMRS port, so as to reduce the complexity and improve the working performance of the base station. Of course, the above-mentioned sorting in ascending order is only a preferred implementation manner, and this is not limited in this embodiment, for example, it may also be sorting in descending order.

其中，N₁和N₂分别为2个DMRS端口组中所包含的DMRS端口数目，max()为取最大数值函数，所述LI域1个比特用于指示所述信道条件最好的下行传输层对应的DMRS端口所属的DMRS端口组，其余比特用于指示该DMRS端口组中的全部DMRS端口对应的下行传输层中所述信道条件最好的下行传输层索引。Optionally, in another implementation manner, when the N is 1 and the M is 2, the number of bits in the LI field is

Wherein, N ₁ and N ₂ are respectively the number of DMRS ports contained in two DMRS port groups, max() is a function of taking the maximum value, and 1 bit of the LI field is used to indicate the downlink transmission with the best channel condition The DMRS port group to which the DMRS port corresponding to the layer belongs, and the remaining bits are used to indicate the index of the downlink transmission layer with the best channel condition in the downlink transmission layer corresponding to all the DMRS ports in the DMRS port group.

Wherein, the above remaining bits are bits in the above LI field except for the above one bit.

In this embodiment, in the case of two DMRS port groups, one bit can be used to indicate the DMRS port group, and then the remaining bits can be used to indicate the channels in all downlink transport layers corresponding to the DMRS ports in the DMRS port group The index of the downlink transport layer with the best conditions. Therefore, the downlink transmission layer with the best channel condition can be indicated with a smaller number of bits, thereby further saving signaling overhead.

Optionally, the 1 bit is the most significant bit (most significant bit, MSB) in the LI field. Of course, this is not limited. For example, the above-mentioned 1 bit may also be the lowest bit in the LI field.

的情况下，所述2个DMRS端口组的索引以DMRS端口组为单位按照升序排列，在每个DMRS端口组内的DMRS端口的端口索引按照升序排列，所述LI域指示的LI的所述其余比特按照升序排列。Optionally, the number of bits in the LI field is

In the case of , the indexes of the two DMRS port groups are arranged in ascending order in units of DMRS port groups, the port indexes of the DMRS ports in each DMRS port group are arranged in ascending order, and the LI indicated by the LI field The rest of the bits are in ascending order.

Wherein, the ascending order of the DMRS port group may be to arrange the indexes of the two DMRS port groups in ascending order, for example: the index of the first DMRS port group is 0, and the index of the second DMRS port group is 1. In this way, when this bit is 0, it indicates the first DMRS port group, and when this bit is 1, it indicates the second DMRS port group.

且

第二个DMRS端口组内的各个DMRS端口索引分别为

且

那么最强的层对应的DMRS端口索引与LI的对应关系如下表2所示。The MSB of LI is the DMRS port group number indication, for example: 0 means that the DMRS port corresponding to the downlink transmission layer with the best channel conditions (abbreviation: the strongest layer) is in the first DMRS port group, and 1 means that the strongest layer corresponds to The DMRS port in the 2nd DMRS port group. The remaining bits (other bits) of the LI except the MSB are indications of the DMRS port number in the DMRS port group. Assume that each DMRS port index in the first DMRS port group is

and

Each DMRS port index in the second DMRS port group is respectively

and

Then, the corresponding relationship between the DMRS port index corresponding to the strongest layer and the LI is shown in Table 2 below.

Table 2:

In this embodiment, since the port indexes of the DMRS ports in each DMRS port group are arranged in ascending order, the remaining bits of the LI field are also arranged in ascending order, so that the LI reported by the terminal is positively correlated with the index of the corresponding DMRS port, Or the two are the same, so that the base station can directly determine the corresponding DMRS port, so as to reduce the complexity and improve the working performance of the base station. Of course, the above-mentioned sorting in ascending order is only a preferred implementation manner, and this is not limited in this embodiment, for example, it may also be sorting in descending order.

Optionally, as shown in Figure 3, the above method may also include the following steps:

303. The terminal receives the PTRS sent by the base station, where the PTRS is mapped on N DMRS ports corresponding to the N downlink transmission layers.

In this embodiment, the PTRS can be mapped to the DMRS port with the best channel condition, thereby improving the estimation accuracy of the phase noise of the PTRS and improving the reliability of transmission.

In this embodiment, a variety of optional implementations are added on the basis of the embodiment shown in Figure 2, and all of them can improve the estimation accuracy of phase noise, improve the reliability of transmission, and reduce the complexity , and beneficial effects such as saving signaling overhead.

Please refer to FIG. 4. FIG. 4 is a flowchart of another LI reporting method provided by an embodiment of the present invention. The method is applied to a base station, and is characterized in that it includes:

Step 401, receiving N LIs reported by the terminal, wherein the N LIs are indexes of N downlink transport layers, N is the number of PTRS ports configured for the terminal, and N is greater than or equal to 1;

Step 402: Determine N DMRS ports corresponding to the N downlink transport layers according to the N LIs;

Wherein, in the case where the N is equal to 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition among all the downlink transmission layers corresponding to the DMRS ports in the M DMRS port groups, wherein the The terminal has the M DMRS port groups, and M is an integer greater than or equal to 1;

In the case where the N is greater than 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition in each of the M downlink transmission layer sets, and the M downlink transmission layer sets Corresponding to the M DMRS port groups respectively.

Optionally, the number of PTRS ports configured on the terminal is 1, and N is 1; or

The number of PTRS ports configured on the terminal is 2, and N is 2.

Optionally, the M is 1 or 2.

Optionally, the base station receives the N LIs reported by the terminal through CSI, where the CSI includes an LI field, and the LI field is used to indicate the N LIs.

其中，N₁和N₂分别为所述2个DMRS端口组中所包含的DMRS端口数目，所述LI域中

个比特用于指示所述信道条件最好的下行传输层索引，

为上取整操作符；或者Optionally, when the N is 1 and the M is 2, the number of bits in the LI field is

Wherein, N ₁ and N ₂ are respectively the DMRS port numbers contained in the two DMRS port groups, and in the LI domain

bits are used to indicate the downlink transport layer index with the best channel condition,

is the upper integer operator; or

其中，N₁和N₂分别为2个DMRS端口组中所包含的DMRS端口数目，max()为取最大数值函数，所述LI域1个比特用于指示所述信道条件最好的下行传输层对应的DMRS端口所属的DMRS端口组，其余比特用于指示该DMRS端口组中的全部DMRS端口对应的下行传输层中所述信道条件最好的下行传输层索引。In the case where the N is 1 and the M is 2, the number of bits in the LI field is

Wherein, N ₁ and N ₂ are respectively the number of DMRS ports contained in two DMRS port groups, max() is a function of taking the maximum value, and 1 bit of the LI field is used to indicate the downlink transmission with the best channel condition The DMRS port group to which the DMRS port corresponding to the layer belongs, and the remaining bits are used to indicate the index of the downlink transmission layer with the best channel condition in the downlink transmission layer corresponding to all the DMRS ports in the DMRS port group.

Optionally, the 1 bit is the highest bit in the LI field.

的情况下，所述M个DMRS端口组中的DMRS端口的端口索引按照升序排列，所述LI域指示的LI按照升序排列；Optionally, the number of bits in the LI field is

In the case of , the port indexes of the DMRS ports in the M DMRS port groups are arranged in ascending order, and the LI indicated by the LI field is arranged in ascending order;

的情况下，所述2个DMRS端口组的索引以DMRS端口组为单位按照升序排列，在每个DMRS端口组内的DMRS端口的端口索引按照升序排列，所述LI域指示的LI的所述其余比特按照升序排列。The number of bits in the LI field is intended for

In the case of , the indexes of the two DMRS port groups are arranged in ascending order in units of DMRS port groups, the port indexes of the DMRS ports in each DMRS port group are arranged in ascending order, and the LI indicated by the LI field The rest of the bits are in ascending order.

It should be noted that this embodiment is an implementation manner of a base station corresponding to the embodiments shown in FIG. 2 and FIG. Beneficial effects, in order to avoid repeated descriptions, details are not repeated here.

Please refer to FIG. 5. FIG. 5 is a structural diagram of a terminal provided by an embodiment of the present invention. As shown in FIG. 5, the terminal 500 includes:

A determining module 501, configured to determine N LIs according to the number of PTRS ports configured on the terminal, where N is the number of PTRS ports, and N is greater than or equal to 1;

A reporting module 502, configured to report the N LIs to the base station, where the N LIs are indexes of N downlink transmission layers;

Wherein, in the case where the N is equal to 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition among all the downlink transmission layers corresponding to the DMRS ports in the M DMRS port groups, wherein the The terminal has the M DMRS port groups, and M is an integer greater than or equal to 1;

In the case where the N is greater than 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition in each of the M downlink transmission layer sets, and the M downlink transmission layer sets Corresponding to the M DMRS port groups respectively.

Optionally, the number of PTRS ports is 1, and N is determined to be 1; or

The number of PTRS ports is 2, and N is determined to be 2.

Optionally, the M is 1 or 2.

Optionally, the terminal reports the N LIs to the base station through a CSI, where the CSI includes an LI field, and the LI field is used to indicate the N LIs.

其中，N₁和N₂分别为所述2个DMRS端口组中所包含的DMRS端口数目，所述LI域中

个比特用于指示所述信道条件最好的下行传输层索引，

为上取整操作符；或者Optionally, when the N is 1 and the M is 2, the number of bits in the LI field is

Wherein, N ₁ and N ₂ are respectively the DMRS port numbers contained in the two DMRS port groups, and in the LI domain

bits are used to indicate the downlink transport layer index with the best channel condition,

is the upper integer operator; or

其中，N₁和N₂分别为2个DMRS端口组中所包含的DMRS端口数目，max()为取最大数值函数，所述LI域1个比特用于指示所述信道条件最好的下行传输层对应的DMRS端口所属的DMRS端口组，其余比特用于指示该DMRS端口组中的全部DMRS端口对应的下行传输层中所述信道条件最好的下行传输层索引。In the case where the N is 1 and the M is 2, the number of bits in the LI field is

Wherein, N ₁ and N ₂ are respectively the number of DMRS ports contained in two DMRS port groups, max() is a function of taking the maximum value, and 1 bit of the LI field is used to indicate the downlink transmission with the best channel condition The DMRS port group to which the DMRS port corresponding to the layer belongs, and the remaining bits are used to indicate the index of the downlink transmission layer with the best channel condition in the downlink transmission layer corresponding to all the DMRS ports in the DMRS port group.

Optionally, the 1 bit is the highest bit in the LI field.

的情况下，所述M个DMRS端口组中的DMRS端口的端口索引按照升序排列，所述LI域指示的LI按照升序排列；Optionally, the number of bits in the LI field is

In the case of , the port indexes of the DMRS ports in the M DMRS port groups are arranged in ascending order, and the LI indicated by the LI field is arranged in ascending order;

的情况下，所述2个DMRS端口组的索引以DMRS端口组为单位按照升序排列，在每个DMRS端口组内的DMRS端口的端口索引按照升序排列，所述LI域指示的LI的所述其余比特按照升序排列。The number of bits in the LI field is intended for

In the case of , the indexes of the two DMRS port groups are arranged in ascending order in units of DMRS port groups, the port indexes of the DMRS ports in each DMRS port group are arranged in ascending order, and the LI indicated by the LI field The rest of the bits are in ascending order.

The terminal provided by the embodiment of the present invention can implement various processes implemented by the terminal in the method embodiments shown in FIG. 2 and FIG. 3 . In order to avoid repetition, details are not repeated here, and the estimation accuracy of phase noise can be improved, and the reliability of transmission can be improved.

Please refer to FIG. 6. FIG. 6 is a structural diagram of a base station provided by an embodiment of the present invention. As shown in FIG. 6, the base station 600 includes:

The receiving module 601 is configured to receive N LIs reported by the terminal, where the N LIs are indexes of N downlink transport layers, N is the number of PTRS ports configured for the terminal, and N is greater than or equal to 1;

A determining module 602, configured to determine N DMRS ports corresponding to the N downlink transport layers according to the N LIs;

Wherein, in the case where the N is equal to 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition among all the downlink transmission layers corresponding to the DMRS ports in the M DMRS port groups, wherein the The terminal has the M DMRS port groups, and M is an integer greater than or equal to 1;

In the case where the N is greater than 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition in each of the M downlink transmission layer sets, and the M downlink transmission layer sets Corresponding to the M DMRS port groups respectively.

Optionally, the number of PTRS ports configured on the terminal is 1, and N is 1; or

The number of PTRS ports configured on the terminal is 2, and N is 2.

Optionally, the M is 1 or 2.

Optionally, the base station receives the N LIs reported by the terminal through CSI, where the CSI includes an LI field, and the LI field is used to indicate the N LIs.

其中，N₁和N₂分别为所述2个DMRS端口组中所包含的DMRS端口数目，所述LI域中

个比特用于指示所述信道条件最好的下行传输层索引，

为上取整操作符；或者Optionally, when the N is 1 and the M is 2, the number of bits in the LI field is

Wherein, N ₁ and N ₂ are respectively the DMRS port numbers contained in the two DMRS port groups, and in the LI domain

bits are used to indicate the downlink transport layer index with the best channel condition,

is the upper integer operator; or

其中，N₁和N₂分别为2个DMRS端口组中所包含的DMRS端口数目，max()为取最大数值函数，所述LI域1个比特用于指示所述信道条件最好的下行传输层对应的DMRS端口所属的DMRS端口组，其余比特用于指示该DMRS端口组中的全部DMRS端口对应的下行传输层中所述信道条件最好的下行传输层索引。In the case where the N is 1 and the M is 2, the number of bits in the LI field is

Wherein, N ₁ and N ₂ are respectively the number of DMRS ports contained in two DMRS port groups, max() is a function of taking the maximum value, and 1 bit of the LI field is used to indicate the downlink transmission with the best channel condition The DMRS port group to which the DMRS port corresponding to the layer belongs, and the remaining bits are used to indicate the index of the downlink transmission layer with the best channel condition in the downlink transmission layer corresponding to all the DMRS ports in the DMRS port group.

Optionally, the 1 bit is the highest bit in the LI field.

的情况下，所述M个DMRS端口组中的DMRS端口的端口索引按照升序排列，所述LI域指示的LI按照升序排列；Optionally, the number of bits in the LI field is

In the case of , the port indexes of the DMRS ports in the M DMRS port groups are arranged in ascending order, and the LI indicated by the LI field is arranged in ascending order;

的情况下，所述2个DMRS端口组的索引以DMRS端口组为单位按照升序排列，在每个DMRS端口组内的DMRS端口的端口索引按照升序排列，所述LI域指示的LI的所述其余比特按照升序排列。The number of bits in the LI field is intended for

In the case of , the indexes of the two DMRS port groups are arranged in ascending order in units of DMRS port groups, the port indexes of the DMRS ports in each DMRS port group are arranged in ascending order, and the LI indicated by the LI field The rest of the bits are in ascending order.

The base station provided by the embodiment of the present invention can implement various processes implemented by the base station in the method embodiment in FIG. 3 . To avoid repetition, details are not repeated here, and the estimation accuracy of phase noise can be improved, and the reliability of transmission can be improved.

FIG. 7 is a schematic diagram of a hardware structure of a terminal implementing various embodiments of the present invention,

The terminal 700 includes but not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, a processor 710, and a power supply 711 and other components. Those skilled in the art can understand that the terminal structure shown in FIG. 7 does not constitute a limitation on the terminal, and the terminal may include more or less components than shown in the figure, or combine certain components, or arrange different components. In the embodiment of the present invention, the terminals include, but are not limited to, mobile phones, tablet computers, notebook computers, palmtop computers, vehicle-mounted terminals, wearable devices, and pedometers.

The processor 710 is configured to determine N LIs according to the number of phase tracking reference signal PTRS ports configured for the terminal, where N is the number of PTRS ports, and N is greater than or equal to 1;

A radio frequency unit 701, configured to report the N LIs to the base station, where the N LIs are indexes of N downlink transmission layers;

Wherein, in the case where the N is equal to 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition among all the downlink transmission layers corresponding to the DMRS ports in the M demodulation reference signal DMRS port groups, Wherein, the terminal has the M DMRS port groups, and M is an integer greater than or equal to 1;

In the case where the N is greater than 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition in each of the M downlink transmission layer sets, and the M downlink transmission layer sets Corresponding to the M DMRS port groups respectively.

Optionally, the number of PTRS ports is 1, and N is determined to be 1; or

The number of PTRS ports is 2, and N is determined to be 2.

Optionally, the M is 1 or 2.

Optionally, the terminal reports the N LIs to the base station through channel state information (CSI), where the CSI includes an LI field, and the LI field is used to indicate the N LIs.

其中，N₁和N₂分别为所述2个DMRS端口组中所包含的DMRS端口数目，所述LI域中

个比特用于指示所述信道条件最好的下行传输层索引，

为上取整操作符；或者Optionally, when the N is 1 and the M is 2, the number of bits in the LI field is

Wherein, N ₁ and N ₂ are respectively the DMRS port numbers contained in the two DMRS port groups, and in the LI domain

bits are used to indicate the downlink transport layer index with the best channel condition,

is the upper integer operator; or

其中，N₁和N₂分别为2个DMRS端口组中所包含的DMRS端口数目，max()为取最大数值函数，所述LI域1个比特用于指示所述信道条件最好的下行传输层对应的DMRS端口所属的DMRS端口组，其余比特用于指示该DMRS端口组中的全部DMRS端口对应的下行传输层中所述信道条件最好的下行传输层索引。In the case where the N is 1 and the M is 2, the number of bits in the LI field is

Wherein, N ₁ and N ₂ are respectively the number of DMRS ports contained in two DMRS port groups, max() is a function of taking the maximum value, and 1 bit of the LI field is used to indicate the downlink transmission with the best channel condition The DMRS port group to which the DMRS port corresponding to the layer belongs, and the remaining bits are used to indicate the index of the downlink transmission layer with the best channel condition in the downlink transmission layer corresponding to all the DMRS ports in the DMRS port group.

Optionally, the 1 bit is the highest bit in the LI field.

的情况下，所述M个DMRS端口组中的DMRS端口的端口索引按照升序排列，所述LI域指示的LI按照升序排列；Optionally, the number of bits in the LI field is

In the case of , the port indexes of the DMRS ports in the M DMRS port groups are arranged in ascending order, and the LI indicated by the LI field is arranged in ascending order;

的情况下，所述2个DMRS端口组的索引以DMRS端口组为单位按照升序排列，在每个DMRS端口组内的DMRS端口的端口索引按照升序排列，所述LI域指示的LI的所述其余比特按照升序排列。The number of bits in the LI field is intended for

In the case of , the indexes of the two DMRS port groups are arranged in ascending order in units of DMRS port groups, the port indexes of the DMRS ports in each DMRS port group are arranged in ascending order, and the LI indicated by the LI field The rest of the bits are in ascending order.

The terminal described above can improve the estimation accuracy of phase noise.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 701 can be used to receive and send signals during sending and receiving information or during a call. Specifically, the downlink data from the base station is received and processed by the processor 710; in addition, the Uplink data is sent to the base station. Generally, the radio frequency unit 701 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 701 can also communicate with the network and other devices through a wireless communication system.

The terminal provides users with wireless broadband Internet access through the network module 702, such as helping users send and receive emails, browse web pages, and access streaming media.

The audio output unit 703 may convert audio data received by the radio frequency unit 701 or the network module 702 or stored in the memory 709 into an audio signal and output as sound. Also, the audio output unit 703 may also provide audio output related to a specific function performed by the terminal 700 (for example, call signal reception sound, message reception sound, etc.). The audio output unit 703 includes a speaker, a buzzer, a receiver, and the like.

The input unit 704 is used to receive audio or video signals. The input unit 704 may include a graphics processing unit (Graphics Processing Unit, GPU) 7041 and a microphone 7042, and the graphics processor 7041 is used for still pictures or video images obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The data is processed. The processed image frames may be displayed on the display unit 706 . The image frames processed by the graphics processor 7041 may be stored in the memory 709 (or other storage media) or sent via the radio frequency unit 701 or the network module 702 . The microphone 7042 can receive sound, and can process such sound into audio data. The processed audio data can be converted into a format that can be sent to a mobile communication base station via the radio frequency unit 701 for output in the case of a phone call mode.

The terminal 700 also includes at least one sensor 705, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 7061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 7061 and/or when the terminal 700 moves to the ear. or backlight. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in various directions (generally three axes), and can detect the magnitude and direction of gravity when it is stationary, and can be used to identify terminal posture (such as horizontal and vertical screen switching, related games, Magnetometer posture calibration), vibration recognition related functions (such as pedometer, knocking), etc.; sensor 705 can also include fingerprint sensor, pressure sensor, iris sensor, molecular sensor, gyroscope, barometer, hygrometer, thermometer, infrared ray Sensors, etc., will not be described in detail here.

The display unit 706 is used to display information input by the user or information provided to the user. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an organic light-emitting diode (Organic Light-Emitting Diode, OLED), or the like.

The user input unit 707 can be used to receive input numbers or character information, and generate key signal input related to user settings and function control of the terminal. Specifically, the user input unit 707 includes a touch panel 7071 and other input devices 7072 . The touch panel 7071, also referred to as a touch screen, can collect touch operations of the user on or near it (for example, the user uses any suitable object or accessory such as a finger or a stylus on the touch panel 7071 or near the touch panel 7071). operate). The touch panel 7071 may include two parts, a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and sends it to the For the processor 710, receive the command sent by the processor 710 and execute it. In addition, the touch panel 7071 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 7071 , the user input unit 707 may also include other input devices 7072 . Specifically, other input devices 7072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be repeated here.

Furthermore, the touch panel 7071 can be covered on the display panel 7061. When the touch panel 7071 detects a touch operation on or near it, it will be sent to the processor 710 to determine the type of the touch event. The type of event provides a corresponding visual output on the display panel 7061. Although in FIG. 7, the touch panel 7071 and the display panel 7061 are used as two independent components to realize the input and output functions of the terminal, in some embodiments, the touch panel 7071 and the display panel 7061 can be integrated to form Realize the input and output functions of the terminal, which is not limited here.

The interface unit 708 is an interface for connecting an external device to the terminal 700 . For example, an external device may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, audio input/output (I/O) ports, video I/O ports, headphone ports, and more. The interface unit 708 may be used to receive input from an external device (for example, data information, power, etc.) transfer data between.

The memory 709 can be used to store software programs as well as various data. The memory 709 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application program required by a function (such as a sound playback function, an image playback function, etc.); Data created by the use of mobile phones (such as audio data, phonebook, etc.), etc. In addition, the memory 709 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

The processor 710 is the control center of the terminal. It uses various interfaces and lines to connect various parts of the entire terminal. By running or executing software programs and/or modules stored in the memory 709, and calling data stored in the memory 709, execution Various functions and processing data of the terminal, so as to monitor the terminal as a whole. The processor 710 may include one or more processing units; preferably, the processor 710 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface and application programs, etc., and the modem The processor mainly handles wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 710 .

The terminal 700 can also include a power supply 711 (such as a battery) for supplying power to various components. Preferably, the power supply 711 can be logically connected to the processor 710 through a power management system, so as to manage charging, discharging, and power consumption through the power management system. Function.

In addition, the terminal 700 includes some functional modules not shown, which will not be repeated here.

Preferably, the embodiment of the present invention also provides a terminal, including a processor 710, a memory 709, and a computer program stored in the memory 709 and operable on the processor 710, and the computer program is implemented when executed by the processor 710 Each process of the above LI reporting method embodiment can achieve the same technical effect, so in order to avoid repetition, details are not repeated here.

Referring to FIG. 8, FIG. 8 is a structural diagram of another base station provided by an embodiment of the present invention. As shown in FIG. 8, the base station 800 includes: a processor 801, a transceiver 802, a memory 803, and a bus interface, wherein:

The transceiver 802 is configured to receive N LIs reported by the terminal, where the N LIs are indexes of N downlink transport layers, N is the number of PTRS ports configured by the terminal, and N is greater than or equal to 1;

A processor 801, configured to determine N DMRS ports corresponding to the N downlink transport layers according to the N LIs;

Wherein, in the case where the N is equal to 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition among all the downlink transmission layers corresponding to the DMRS ports in the M DMRS port groups, wherein the The terminal has the M DMRS port groups, and M is an integer greater than or equal to 1;

In the case where the N is greater than 1, the N downlink transmission layers are the downlink transmission layer with the best channel condition in each of the M downlink transmission layer sets, and the M downlink transmission layer sets Corresponding to the M DMRS port groups respectively.

Optionally, the number of PTRS ports configured on the terminal is 1, and N is 1; or

The number of PTRS ports configured on the terminal is 2, and N is 2.

Optionally, the M is 1 or 2.

Optionally, the base station receives the N LIs reported by the terminal through CSI, where the CSI includes an LI field, and the LI field is used to indicate the N LIs.

其中，N₁和N₂分别为所述2个DMRS端口组中所包含的DMRS端口数目，所述LI域中

个比特用于指示所述信道条件最好的下行传输层索引，

为上取整操作符；或者Optionally, when the N is 1 and the M is 2, the number of bits in the LI field is

Wherein, N ₁ and N ₂ are respectively the DMRS port numbers contained in the two DMRS port groups, and in the LI domain

bits are used to indicate the downlink transport layer index with the best channel condition,

is the upper integer operator; or

其中，N₁和N₂分别为2个DMRS端口组中所包含的DMRS端口数目，max()为取最大数值函数，所述LI域1个比特用于指示所述信道条件最好的下行传输层对应的DMRS端口所属的DMRS端口组，其余比特用于指示该DMRS端口组中的全部DMRS端口对应的下行传输层中所述信道条件最好的下行传输层索引。In the case where the N is 1 and the M is 2, the number of bits in the LI field is

Wherein, N ₁ and N ₂ are respectively the number of DMRS ports contained in two DMRS port groups, max() is a function of taking the maximum value, and 1 bit of the LI field is used to indicate the downlink transmission with the best channel condition The DMRS port group to which the DMRS port corresponding to the layer belongs, and the remaining bits are used to indicate the index of the downlink transmission layer with the best channel condition in the downlink transmission layer corresponding to all the DMRS ports in the DMRS port group.

Optionally, the 1 bit is the highest bit in the LI field.

的情况下，所述M个DMRS端口组中的DMRS端口的端口索引按照升序排列，所述LI域指示的LI按照升序排列；Optionally, the number of bits in the LI field is

In the case of , the port indexes of the DMRS ports in the M DMRS port groups are arranged in ascending order, and the LI indicated by the LI field is arranged in ascending order;

的情况下，所述2个DMRS端口组的索引以DMRS端口组为单位按照升序排列，在每个DMRS端口组内的DMRS端口的端口索引按照升序排列，所述LI域指示的LI的所述其余比特按照升序排列。The number of bits in the LI field is intended for

In the case of , the indexes of the two DMRS port groups are arranged in ascending order in units of DMRS port groups, the port indexes of the DMRS ports in each DMRS port group are arranged in ascending order, and the LI indicated by the LI field The rest of the bits are in ascending order.

The base station described above can improve the estimation accuracy of phase noise.

Wherein, the transceiver 802 is configured to receive and send data under the control of the processor 801, and the transceiver 802 includes at least two antenna ports.

In FIG. 8 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 801 and various circuits of memory represented by memory 803 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. Transceiver 802 may be a plurality of elements, including a transmitter and a receiver, providing a means for communicating with various other devices over transmission media. For different user equipments, the user interface 804 may also be an interface capable of connecting externally and internally to required equipment, and the connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 801 is responsible for managing the bus architecture and general processing, and the memory 803 can store data used by the processor 801 when performing operations.

Preferably, the embodiment of the present invention also provides a base station, including a processor 801, a memory 803, and a computer program stored in the memory 803 and operable on the processor 801, and the computer program is implemented when executed by the processor 801 Each process of the above LI reporting method embodiment can achieve the same technical effect, so in order to avoid repetition, details are not repeated here.

The embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, each of the embodiments of the terminal-side LI reporting method provided by the embodiment of the present invention is implemented. process, or when the computer program is executed by the processor, each process of the embodiment of the LI reporting method on the base station side provided by the embodiment of the present invention can be realized, and the same technical effect can be achieved. To avoid repetition, details are not repeated here. Wherein, the computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM for short), a random access memory (Random Access Memory, RAM for short), a magnetic disk or an optical disk, and the like.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products are stored in a storage medium (such as ROM/RAM, disk, CD) contains several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in various embodiments of the present invention.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, without departing from the gist of the present invention and the protection scope of the claims, many forms can also be made, all of which belong to the protection of the present invention.

Claims (19)

1. A layer index LI reporting method is applied to a terminal and is characterized by comprising the following steps:

determining N LI according to the number of PTRS ports of the phase tracking reference signals configured for the terminal, wherein N is the number of the PTRS ports, and N is greater than or equal to 1;

reporting the N LI to a base station, wherein the N LI are indexes of N downlink transmission layers;

when the N is equal to 1, the N downlink transmission layers are downlink transmission layers with the best channel conditions in all downlink transmission layers corresponding to DMRS ports in M demodulation reference signal DMRS port groups, where the M DMRS port groups exist in the terminal, and M is an integer greater than or equal to 1;

when the N is greater than 1, the N downlink transmission layers are downlink transmission layers with the best channel condition in each of M downlink transmission layer sets, and the M downlink transmission layer sets respectively correspond to the M DMRS port groups; wherein N is equal to M in the case that N is greater than 1.

2. The method of claim 1, wherein the number of PTRS ports is 1, N is determined to be 1; or

The number of PTRS ports is 2, and N is determined to be 2.

3. The method of claim 2, wherein M is 1 or 2.

4. The method of claim 2 or 3, wherein the terminal reports the N LIs to the base station via Channel State Information (CSI), wherein the CSI comprises an LI field indicating the N LIs.

5. The method of claim 4, wherein in the case where N is 1 and M is 2, the number of bits of the LI domain is

Wherein, N ₁ And N ₂ The number of DMRS ports contained in the 2 DMRS port groups respectively, the LI domain

One bit is used to indicate the downlink transport layer index with the best channel conditions,

a rounding operator is used; or

In the case where N is 1 and M is 2, the number of bits of the LI field is aimed at

Wherein N is ₁ And N ₂ The number of the DMRS ports contained in the 2 DMRS port groups is respectively, max () is a maximum value function, 1 bit in the LI domain is used for indicating the DMRS port group to which the DMRS port corresponding to the downlink transmission layer with the best channel condition belongs, and the rest bits are used for indicating the downlink transmission layer index with the best channel condition in the downlink transmission layers corresponding to all the DMRS ports in the DMRS port group.

6. The method of claim 5, wherein the 1 bit is a highest bit in the LI domain.

7. The method of claim 5, wherein the number of bits in the LI domain is

In the case of (2), the port indexes of the DMRS ports in the M DMRS port groups are arranged in an ascending order, and LI indicated by the LI domain is arranged in an ascending order;

the number of bits in the LI field is aimed at

In case of (2), the indexes of the 2 DMRS port groups are arranged in an ascending order by DMRS port group unit, the port indexes of the DMRS ports in each DMRS port group are arranged in an ascending order, and the remaining bits of the LI indicated by the LI domain are arranged in an ascending order.

8. An LI reporting method is applied to a base station, and is characterized by comprising the following steps:

receiving N LI reported by a terminal, wherein the N LI are indexes of N downlink transmission layers, N is the number of PTRS ports configured by the terminal, and N is greater than or equal to 1;

determining N DMRS ports corresponding to the N downlink transmission layers according to the N LI;

wherein, when N is equal to 1, the N downlink transmission layers are downlink transmission layers with the best channel conditions in all downlink transmission layers corresponding to DMRS ports in M DMRS port groups, where the terminal has the M DMRS port groups, and M is an integer greater than or equal to 1;

when the N is greater than 1, the N downlink transmission layers are downlink transmission layers with the best channel condition in each of M downlink transmission layer sets, and the M downlink transmission layer sets respectively correspond to the M DMRS port groups; wherein N is equal to M if N is greater than 1.

9. The method of claim 8, wherein the terminal is configured with a number of PTRS ports of 1, N of 1; or alternatively

The number of PTRS ports configured for the terminal is 2, and N is 2.

10. The method of claim 9, wherein M is 1 or 2.

11. The method of claim 9 or 10, wherein the base station receives the N LI reported by the terminal through CSI, wherein the CSI comprises an LI field, and wherein the LI field is used to indicate the N LI.

12. The method of claim 11, wherein in case that N is 1 and M is 2, the number of bits of the LI domain is

Wherein N is ₁ And N ₂ The number of DMRS ports contained in the 2 DMRS port groups respectively, the LI domain

One bit is used to indicate the downlink transport layer index where the channel condition is best,

a rounding operator is used; or

In the case where N is 1 and M is 2, the number of bits of the LI field is aimed at

Wherein, N ₁ And N ₂ The number of the DMRS ports contained in the 2 DMRS port groups is respectively, max () is a maximum value function, 1 bit of the LI domain is used for indicating the DMRS port group to which the DMRS port corresponding to the downlink transmission layer with the best channel condition belongs, and the rest bits are used for indicating the downlink transmission layer index with the best channel condition in the downlink transmission layers corresponding to all the DMRS ports in the DMRS port group.

13. The method of claim 12, wherein the 1 bit is a highest bit in the LI domain.

14. The method of claim 12, wherein the number of bits in the LI domain is

In case of (2), the port indexes of the DMRS ports in the M DMRS port groups are arranged in ascending order, and LI indicated by the LI domain is arranged in ascending order;

the number of bits in the LI field is aimed at

In case of (2), the group of DMRS portsThe indexes are arranged in ascending order by taking the DMRS port group as a unit, the port indexes of the DMRS ports in each DMRS port group are arranged in ascending order, and the rest bits of the LI indicated by the LI domain are arranged in ascending order.

15. A terminal, comprising:

the determining module is used for determining N LI according to the configured PTRS port number of the terminal, wherein N is the PTRS port number, and N is greater than or equal to 1;

a reporting module, configured to report the N LIs to a base station, where the N LIs are indexes of N downlink transport layers;

wherein, when N is equal to 1, the N downlink transmission layers are downlink transmission layers with the best channel conditions in all downlink transmission layers corresponding to DMRS ports in M DMRS port groups, where the M DMRS port groups exist in the terminal, and M is an integer greater than or equal to 1;

when N is greater than 1, the N downlink transmission layers are downlink transmission layers with the best channel conditions in each of M downlink transmission layer sets, and the M downlink transmission layer sets respectively correspond to the M DMRS port groups; wherein N is equal to M in the case that N is greater than 1.

16. A base station, comprising:

a receiving module, configured to receive N LIs reported by a terminal, where the N LIs are indexes of N downlink transport layers, N is a number of PTRS ports configured for the terminal, and N is greater than or equal to 1;

a determining module, configured to determine, according to the N LIs, N DMRS ports corresponding to the N downlink transmission layers;

wherein, when N is equal to 1, the N downlink transmission layers are downlink transmission layers with the best channel conditions in all downlink transmission layers corresponding to DMRS ports in M DMRS port groups, where the terminal has the M DMRS port groups, and M is an integer greater than or equal to 1;

when N is greater than 1, the N downlink transmission layers are downlink transmission layers with the best channel conditions in each of M downlink transmission layer sets, and the M downlink transmission layer sets respectively correspond to the M DMRS port groups; wherein N is equal to M in the case that N is greater than 1.

17. A terminal, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps in the LI reporting method as claimed in any one of claims 1 to 7.

18. A base station, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps in the LI reporting method as claimed in any one of claims 8 to 14.

19. A computer-readable storage medium, characterized in that it has stored thereon a computer program which, when being executed by a processor, carries out the steps of the LI reporting method as claimed in one of the claims 1 to 7, or which, when being executed by a processor, carries out the steps of the LI reporting method as claimed in one of the claims 8 to 14.

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