WO2021147106A1 - Method and device for dmrs configuration - Google Patents

Abstract

A method and device for DMRS configuration, for use in solving the problem in the prior art in which adjacent cell channel estimation could not be performed in a multicell scenario. A first network device acquires information of a first resource area of a first cell and a first DMRS generating parameter corresponding to the first resource area; transmits a first message and a second message to a terminal device, the first message comprising the information of the first resource area and the first DMRS generating parameter; the second message comprising a second DMRS generating parameter, the second DMRS generating parameter being used for generating a DMRS corresponding to a resource outside of the first resource area; and transmits a third message to a second network device, the third message comprising a first DMRS generating parameter; the terminal device generates a corresponding DMRS on the basis of the first DMRS generating parameter and/or the second DMRS generating parameter; and, the second network device receives the first DMRS from the terminal device and estimates channel information of the first cell on the basis of the first DMRS generating parameter and of the first DMRS.

Description

A DMRS configuration method and device Technical field

This application relates to the field of communication technology, and in particular to a method and device for configuring a demodulation reference signal (DMRS).

Background technique

In the fourth generation (4G) and fifth generation (5G) wireless communication systems, such as the new radio access technology (NR) system, a demodulation reference signal (demodulation reference signal) is defined , DMRS), sounding reference signal (sounding reference signal, SRS) is used for network side channel estimation. The SRS signal is used for channel state information (channel state information, CSI) measurement, and the DMRS is used for physical uplink shared channel (physical uplink shared channel, PUSCH) data demodulation. When performing CSI measurement and data demodulation, it is necessary to first estimate the current channel state based on the pilot, that is, perform channel estimation.

In the uplink DMRS channel estimation, it is also closely related to the adopted waveform configuration. In the NR system, two waveforms are supported, namely, cyclic prefix-based orthogonal frequency division multiplexing (CP-OFDM) and discrete fourier transform based orthogonal frequency division multiplexing (discrete fourier transform -spread-orthogonal frequency division multiplexing, DFT-S-OFDM) waveform. Which waveform to use for uplink is mainly configured through high-level signaling. Among them, the different waveforms will lead to the failure of the DMRS sequence generation method. For example, the DFT-S-OFDM waveform adopts the ZC sequence, and the CP-OFDM waveform adopts the gold sequence. For different sequence generation methods, different channel estimation algorithms need to be designed. Specifically, the DMRS sequence generation is related to high-level configuration parameters, such as scrambling codes.

At present, each cell independently configures a set of DMRS generation parameters for terminal equipment for one waveform. When generating DMRS sequences in different cells, interference randomization is used to reduce interference. However, in a multi-cell scenario, channel estimation of neighboring cells cannot be performed, which is not conducive to interference suppression or interference cancellation.

Summary of the invention

The present application provides a DMSR configuration method and device to solve the problem that the channel estimation of neighboring cells cannot be performed in a multi-cell scenario in the prior art, which is not conducive to interference suppression or interference cancellation.

In the first aspect, this application provides a DMRS configuration method. The method may include: acquiring information of a first resource area of a first cell and a first DMRS generation parameter corresponding to the first resource area, and the first resource The area is the same frequency domain resources of at least two cells, the at least two cells include the first cell; a first message and a second message are sent to the terminal device, wherein the first message includes the first cell Information about a resource area and the first DMRS generation parameter corresponding to the first resource area, the second message includes a second DMRS generation parameter, and the second DMRS generation parameter is used to generate a second DMRS, so The second DMRS corresponds to a resource outside the first resource area; and a third message is sent to a second network device, the third message includes the first resource area corresponding to the first cell of the first cell A DMRS generation parameter.

Through the above method, by dividing the same frequency domain resources for at least two cells, network devices can generate DMRS parameters in the resource area of the cells covered by the exchange, so that the network devices can analyze the DMRS interfered by neighboring cells, and then can target Channel estimation in the neighboring cell is beneficial for network equipment to suppress or eliminate interference in the neighboring cell, thereby improving the throughput of uplink edge users and the average throughput of uplink cells.

In a possible design, the signal strength difference between any cell other than the first cell in the at least two cells and the first cell is less than a set threshold. In this way, the at least two cells may share the first resource area.

In a possible design, downlink control signaling is sent to the terminal device, where the downlink control signaling indicates a first scheduling resource, and the first scheduling resource belongs to and/or does not belong to the first resource area . In this way, resource scheduling can be completed, so that the terminal device generates corresponding DMRS based on the corresponding DMRS generation parameters according to the resource scheduling result.

In a possible design, a notification message is sent to the second network device, the notification message includes the information of the first resource area, or the third message includes the information of the first resource area; then A confirmation message is received from the second network device. In this way, the negotiation of the information of the first resource area between network devices can be completed.

In a possible design, the information of the first resource region is resource block RB allocation information of the first resource region.

In the second aspect, the present application provides a DMRS configuration method. The method may include: receiving a first message through a first cell of a first network device, where the first message includes information about the first resource area and information related to the The first DMRS generation parameter corresponding to the first resource area, the first resource area is the same frequency domain resources of at least two cells, and the at least two cells include the first cell; The network device receives a second message, where the second message includes a second DMRS generation parameter, the second DMRS generation parameter is used to generate a second DMRS, and the second DMRS corresponds to a second DMRS outside the first resource area Resource; then generate a corresponding DMRS according to the first DMRS generation parameter and/or the second DMRS generation parameter; send the DMRS.

Through the above method, the terminal equipment can determine and send the corresponding DMRS according to the DMRS generation parameters corresponding to different resource areas, and by dividing the same frequency domain resources for at least two cells, the network equipment exchanges the coverage of the cell in the resource area. DMRS generation parameters inside, so that the network equipment can analyze the DMRS of the neighboring cell interference, and then can estimate the channel for the neighboring cell, which is conducive to the network equipment to suppress or eliminate the interference of the neighboring cell, thereby improving the uplink edge user throughput And the average throughput of the uplink cell.

In a possible design, the signal strength difference between any cell other than the first cell in the at least two cells and the first cell is less than a set threshold. In this way, the at least two cells may share the first resource area.

In a possible design, downlink control signaling is received from a first network device, where the downlink control signaling indicates a first scheduling resource; when the first scheduling resource belongs to the first resource area, according to the The first DMRS parameter generates the first DMRS corresponding to the first resource area; and/or, when the first scheduling resource does not belong to the first resource area, the second DMRS is generated according to the second DMRS parameter . In this way, the terminal device can generate the corresponding DMRS based on the corresponding DMRS generation parameters according to the resource scheduling result.

In a possible design, the information of the first resource region is resource block RB allocation information of the first resource region.

In a possible design, when the waveform of the DMRS sequence is an orthogonal frequency division multiplexing DFT-S-OFDM waveform extended based on discrete Fourier transform, the first DMRS parameter corresponding to the first resource region is generated according to the first DMRS parameter. For a DMRS, a specific method may be: generating the first DMRS corresponding to the first resource region according to the first DMRS parameter and the RB allocation information. In this way, a matching DMRS can be generated based on the DMRS generation parameters that comply with the first resource area.

In a possible design, when the first scheduling resource belongs to the first resource area, and the first scheduling resource is N ₁ RBs, the first DMRS generated according to the first DMRS parameter The length satisfies the following formula:

Wherein, M1 is the length of the first DMRS;

Is the number of subcarriers included in one RB; δ is a fixed value; N _{1 is} less than or equal to M, and M is the number of RBs corresponding to the RB allocation information;

and / or,

When the first scheduling resource does not belong to the first resource area and the first scheduling resource is N ₂ RBs, the length of the second DMRS generated according to the second DMRS parameter satisfies the following formula:

Wherein, M2 is the length of the second DMRS.

In a possible design, when the _{RBs that belong to the first resource region of the first scheduling resource are N 1} RBs, and the RBs that do not belong to the first resource region are N ₂ RBs, the The total length of a DMRS and the second DMRS satisfy the following formula:

Wherein, M3 is the total length of the first DMRS and the second DMRS;

Is the number of subcarriers included in one RB; δ is a fixed value; N _{1 is} less than or equal to M, and M is the number of RBs of the RB corresponding to the RB allocation information;

or,

The total length of the first DMRS and the second DMRS satisfies the following formula:

Wherein, M4 is the total length of the first DMRS and the second DMRS;

Is the number of subcarriers included in one RB; δ is a fixed value; M is the number of RBs corresponding to the RB allocation information.

In a third aspect, the present application provides a DMRS configuration method. The method includes: receiving a third message from a first network device, where the third message includes a first DMRS generation parameter corresponding to a first resource area, and the first The resource area is the same frequency domain resources of at least two cells, the at least two cells including the first cell; a first DMRS is received from a terminal device, and the first DMRS is generated based on the first DMRS generation parameter ; Finally, the channel information of the first cell is estimated according to the first DMRS generation parameter and the first DMRS.

Through the above method, by dividing the same frequency domain resources for at least two cells, network devices can generate DMRS parameters in the resource area of the cells covered by each other, so that the network devices can analyze the DMRS interfered by neighboring cells, and then can target Channel estimation in the neighboring cell is beneficial for network equipment to suppress or eliminate interference in the neighboring cell, thereby improving the throughput of uplink edge users and the average throughput of uplink cells.

In a possible design, the signal strength difference between any cell other than the first cell in the at least two cells and the first cell is less than a set threshold. In this way, the at least two cells may share the first resource area.

In a possible design, a notification message is received from the first network device, and the notification message includes information about the first resource area; or the third message includes information about the first resource area; The first network device sends a confirmation message. In this way, the negotiation on the information of the first resource area between the network devices can be completed.

In a possible design, the information of the first resource region is resource block RB allocation information of the first resource region.

In a fourth aspect, the present application also provides a device, which may be a first network device, and the device has the function of implementing the foregoing method example of the first aspect or each possible design example of the first aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the device includes a transceiver unit and a processing unit. These units can perform the corresponding functions in the first aspect or each possible design example of the first aspect. For details, please refer to the detailed description in the method example. , Do not repeat it here.

In a possible design, the structure of the device includes a transceiver, a processor, and optionally a memory. The transceiver is used for sending and receiving data and for communicating and interacting with other devices in the communication system. The processor is configured to support the device to perform the corresponding functions in the first aspect or each possible design method of the first aspect. The memory is coupled with the processor, and it stores program instructions and data necessary for the device.

In the fifth aspect, the present application also provides a device, which may be a terminal device, and the device has the function of implementing the foregoing method example of the second aspect or each possible design example of the second aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the device includes a transceiver unit and a processing unit. These units can perform the corresponding functions in the second aspect or each possible design example of the second aspect. For details, please refer to the detailed description in the method example , Do not repeat it here.

In a possible design, the structure of the device includes a transceiver, a processor, and optionally a memory. The transceiver is used for sending and receiving data and for communicating and interacting with other devices in the communication system. The processor is configured to support the device to perform corresponding functions in the second aspect or each possible design method of the second aspect. The memory is coupled with the processor, and it stores program instructions and data necessary for the device.

In the sixth aspect, the present application also provides a device, which may be a second network device, and the device has the function of implementing the foregoing method example of the third aspect or each possible design example of the third aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the device includes a transceiver unit and a processing unit. These units can perform the corresponding functions in the third aspect or each possible design example of the third aspect. For details, please refer to the detailed description in the method example , Do not repeat it here.

In a possible design, the structure of the device includes a transceiver, a processor, and optionally a memory. The transceiver is used for sending and receiving data and for communicating and interacting with other devices in the communication system. The processor is configured to support the device to perform corresponding functions in the third aspect or each possible design method of the third aspect. The memory is coupled with the processor, and it stores program instructions and data necessary for the device.

In a seventh aspect, an embodiment of the present application provides a communication system, which may include the aforementioned first network device, terminal device, and second network device.

In an eighth aspect, a computer-readable storage medium provided by an embodiment of the present application, the computer-readable storage medium stores program instructions, and when the program instructions run on a computer, the computer executes the first aspect of the embodiments of the present application and its Any possible design, or any possible design of the second aspect or the second aspect, or any possible design of the third aspect or the third aspect. Exemplarily, the computer-readable storage medium may be any available medium that can be accessed by a computer. Take this as an example but not limited to: computer-readable media may include non-transitory computer-readable media, random-access memory (RAM), read-only memory (ROM), and electrically erasable In addition to programmable read-only memory (electrically EPROM, EEPROM), CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can Any other medium accessed by the computer.

In a ninth aspect, the embodiments of the present application provide a computer program product including computer program code or instructions. When the computer program code or instructions are executed, the computer program product described in the first aspect, the second aspect, or the third aspect The method is implemented.

In a tenth aspect, the present application also provides a chip, which is coupled with a memory, and is configured to read and execute program instructions stored in the memory to implement any of the above methods.

Description of the drawings

FIG. 1 is a schematic diagram of the architecture of a communication system provided by this application;

Figure 2 is a schematic diagram of a type of multi-cell coordination provided by this application;

FIG. 3 is a flowchart of a DMRS configuration method provided by this application;

FIG. 4 is a schematic diagram of a first resource area provided by this application;

FIG. 5 is a schematic diagram of resource allocation of a terminal device provided by this application;

FIG. 6 is a schematic diagram of resource allocation of another terminal device provided by this application;

FIG. 7 is a schematic structural diagram of a device provided by this application;

FIG. 8 is a structural diagram of a device provided by this application;

FIG. 9 is a schematic structural diagram of a network device provided by this application.

Detailed ways

The embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

The DMRS configuration method provided by the embodiment of the present application is used to solve the problem that the channel estimation of the neighboring cell cannot be performed in the multi-cell scenario in the prior art, which is not conducive to interference suppression or interference cancellation.

In the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing description, and cannot be understood as indicating or implying relative importance, nor as indicating or implying order.

It should be understood that in the embodiments of the present application, "at least one" refers to one or more, and "multiple" refers to two or more than two. "And/or" describes the association relationship of the associated object, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are in an "or" relationship. "The following at least one (item)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a). For example, at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c It can be single or multiple.

In order to describe the technical solutions of the embodiments of the present application more clearly, the DMRS configuration method and device provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows the architecture of a possible communication system to which the DMRS configuration method provided in this application is applicable. The architecture of the communication system may include network equipment and terminal equipment. specific:

The network equipment is configured to receive uplink signals from the terminal equipment or send downlink signals to the terminal equipment; the network equipment may be a long term evolution (LTE) and/or NR network equipment, specifically It can be a base station (NodeB), an evolved base station (eNodeB), a base station in a 5G mobile communication system, a next generation Node B (gNB), a base station in a future mobile communication system or a Wi-Fi system Access node, etc. The network device may also be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU).

In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include a radio unit (RU). CU implements some functions of gNB, DU implements some functions of gNB, for example, CU implements radio resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP) layer functions, and DU implements wireless link Channel control (radio link control, RLC), media access control (media access control, MAC) and physical (physical, PHY) layer functions. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling or PHCP layer signaling, can also be used. It is considered to be sent by DU, or sent by DU+RU. It can be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into network equipment in a radio access network (RAN), and the CU can also be divided into network equipment in the core network CN, which is not limited.

The terminal equipment may also be referred to as user equipment (UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), and so on. The terminal device is an entity on the user side that is used to receive or transmit a signal, and is used to send an uplink signal to the network device or receive a downlink signal from the network device. The terminal equipment may include sensors such as mobile phones, cars, tablets, smart speakers, train detectors, gas stations, etc. The main functions include collecting data (part of the terminal equipment), receiving control information and downlink data from network equipment, and sending electromagnetic waves, Transmit uplink data to network equipment.

It should be understood that the communication system may include one or more network devices and one or more terminal devices. In Figure 1, only one network device and four terminal devices (such as terminal device 1, terminal device in Figure 1 The device 2, the terminal device 3, and the terminal device 4) are shown as examples, but the number of network devices and terminal devices in the communication system cannot be limited.

It should be noted that the architecture of the communication system shown in FIG. 1 is not limited to include only the nodes or devices shown in the figure, and may also include other devices not shown in the figure. Specifically, this application will not be one by one here. Enumerate.

It should be noted that the embodiment of the present application does not limit the distribution form of each node or device, and the distribution form shown in FIG. 1 is only exemplary, and the present application does not limit it.

It should be understood that the names of all nodes or devices in this application are merely examples, and may also be referred to as other names in future communications, or in future communications, the nodes or devices involved in this application may also use other entities or devices with the same function. Instead, this application does not limit it. Here is a unified explanation, and will not be repeated in the following.

It should be noted that the communication system shown in FIG. 1 may be a 4G or 5G mobile communication system, and the method of the embodiment of the present application is also applicable to various future communication systems, such as 6G or other communication networks. As long as there is an entity in the communication system that needs to send downlink data and pilot information, another entity needs to receive the indication information, and can feedback information and transmit data through the uplink; that is, as long as the communication system has downlink and uplink communication links, such communication The system can be applied to this application.

In the communication system, according to the different types of sending nodes and receiving nodes, communication can be divided into different types. Generally, sending information from a network device to a terminal device is called downlink (DL) communication, and sending information from a terminal device to a network device is called uplink (UL) communication. In 4G and 5G wireless communication systems, such as NR systems, DMRS is defined, and SRS is used for network side channel estimation. The SRS signal is used for channel state information CSI measurement, and the DMRS is used for PUSCH data demodulation. When performing CSI measurement and data demodulation, it is necessary to first estimate the current channel state based on the pilot, that is, perform channel estimation. In the uplink DMRS channel estimation, it is also closely related to the adopted waveform configuration. In the NR system, two waveforms are supported, namely CP-OFDM and DFT-S-OFDM waveforms. Which waveform to use for uplink is mainly configured through high-level signaling. Among them, different waveforms will lead to different DMRS sequence generation methods. For example, the DFT-S-OFDM waveform adopts the ZC sequence, while the CP-OFDM waveform adopts the gold sequence. Specifically, the DMRS sequence generation is related to high-level configuration parameters, such as scrambling codes.

At present, each cell independently configures a set of DMRS generation parameters for terminal equipment for one waveform. When generating DMRS sequences in different cells, interference randomization is used to reduce interference. In a multi-cell scenario, since the serving network device does not know the DMRS sequence generation parameters and the resource allocation location of the neighboring cell interfering terminal device, it cannot estimate the channel information of the neighboring cell interfering terminal device, and cannot perform interference suppression or interference cancellation. For cell-edge terminal devices, the inter-cell interference is usually more severe; while for cell-edge terminal devices, when the network equipment is densely deployed, they will still suffer from greater neighbor interference. Therefore, how to suppress inter-cell interference is of great significance for improving cell edge coverage and cell average capacity. Based on this, this application proposes a DMRS configuration method to solve the problem that the channel estimation of the neighboring cell cannot be performed in the multi-cell scenario in the prior art, which is not conducive to interference suppression or interference cancellation.

In the multi-cell scenario, multi-cell coordination is mainly divided into two types: intra-site (Intra-site) collaboration and inter-site (Inter-site) collaboration, as shown in Figure 2. Specifically, Intra-site collaboration means that coordinated cells are connected to the same site (site or network equipment), and information exchange between cells can be completed within the same site. Inter-site collaboration means that coordinated cells are connected to different sites, and the information exchange between cells needs to be exchanged through the Xn (defined as Xn interface in NR, and X2 interface in LTE) interface interaction. In addition to Intra-site and Inter-site collaboration, there are many other collaboration architectures, such as a collaboration architecture based on distributed antennas, which will not be listed here. The method of this application is not limited to a certain collaborative architecture. Under a given collaborative architecture, a set of collaborative cells needs to be determined. For example, in Inter-site cooperation, when the terminal device is close to the three network devices, three cells can be considered for cooperation. When the terminal equipment is only close to the network equipment where the cell 1 and cell 2 are located, and far away from the network equipment where the cell 3 is located, the cell 1 and cell 2 can be selected for cooperation. A common method for dividing the coordinated cell set is to divide it according to the reference signal receive power (RSRP). For example, when the difference between the RSRP of each cell measured by the terminal equipment is less than a predetermined threshold, these cells can be divided into the same coordinated cell set.

In the NR or LTE system, the time-frequency unit for uplink or downlink scheduling can be in resource block (resource block, RB) as a unit (1 RB includes 12 subcarriers in the frequency domain), or it can be a resource block group ( The resource block group (RBG) is a unit, and the RBG can be composed of different numbers of consecutive RBs according to different system bandwidths. The composition and size of RBG are shown in Table 1 below:

Table 1

If resources are allocated in units of RBs, the scheduled RBs need to be continuous. If RBG is used as a unit to allocate resources, the scheduled RBG can be continuous or discontinuous, but the RBs in each RBG must be continuous. Below, RB and RGB are both described in terms of "scheduling unit". In addition to frequency domain resources, a scheduling unit may also include time domain resources. Time domain resources refer to the number of orthogonal frequency division multiplexing (OFDM) symbols occupied. In the NR system, based on a slot-based scheduling method, one scheduling unit may include 14 OFDM symbols. Based on a non-slot (non-slot) scheduling method, the number of OFDM symbols included in a scheduling unit is greater than or equal to 2, and less than 14, such as 2, 4, or 7 OFDM symbols.

In PUSCH transmission, in order to demodulate PUSCH data, it is first necessary to perform channel estimation on the uplink DMRS. In addition to the signal quality of the DMRS itself, the strength of the adjacent cell interference signal will also affect the performance of the channel estimation. Especially for cell edge terminal equipment, interference from neighboring cells is more serious. For example, in a peak and nest network consisting of 57 cells, the target cell will receive interference from 56 other cells, but the strong interference mainly comes from the terminal equipment served by the network equipment adjacent to the target cell. For the strong interference of the neighboring cell, if the interference channel can be estimated, the minimum mean square error-interference rejection combination (MMSE-IRC) can be used to suppress the interference. For the estimation of the neighboring cell interference channel, it is necessary to first know the DMRS sequence sent by the neighboring cell terminal equipment. Since the terminal equipment scheduled by the neighboring cell may be different in each transmission time interval (TTI), and the assigned scheduling unit may also change dynamically, resulting in the target cell being unable to dynamically obtain the neighboring cell interfering terminal equipment DMRS sequence generation parameters and time-frequency resource allocation results. In response to this problem, this application proposes a DMRS configuration method.

Based on the foregoing description, this application provides a DMRS configuration method, which is applied to the communication system shown in FIG. 1. Referring to Figure 3, the specific process of this method can be:

Step 301: The first network device obtains the information of the first resource area of the first cell and the first DMRS generation parameter corresponding to the first resource area, where the first resource area is the same frequency domain of at least two cells Resource, the at least two cells include the first cell.

Specifically, the signal strength difference between any one of the at least two cells except the first cell and the first cell is less than a set threshold. That is, the at least two cells are cells that cooperate with each other.

In an optional implementation manner, the first resource area may include part of the resources on the system bandwidth, as shown in FIG. 4. In Figure 4, each grid can be seen as a resource occupied by a scheduling unit in the frequency domain. For example, each grid can represent one RB or one RBG.

Step 302: The first network device sends a first message to the terminal device through the first cell, where the first message includes information about the first resource area and all information corresponding to the first resource area. The first DMRS generation parameter.

The information of the first resource region is RB allocation information of the first resource region. Specifically, the information of the first resource region includes the time-frequency position of the RB in the first resource region.

In an exemplary implementation manner, a bitmap (bitmap) may be used to indicate the time-frequency position of the RB in the first resource region, and the range indicated by the bitmap is the number of RBs in the entire system bandwidth. For example, when the bit value in the bitmap is 1, it means that the RB belongs to the first resource area.

In another exemplary embodiment, if the first resource area is a continuous RB, it may indicate the total number of RBs in the entire system bandwidth, the starting RB position of the first resource area, and the The number of RBs included in the first resource area.

Optionally, when the first resource area includes multiple areas, the RB information of each area may be indicated separately.

In an optional implementation manner, the first message may be cell-specific high-layer signaling, or terminal device-specific high-layer signaling. For example, RRC signaling, MAC signaling, and so on.

In an optional implementation manner, the information of the first resource area may be sent through cell-specific high-level signaling, and the first DMRS generation parameter corresponding to the first resource area may be transmitted through terminal device-specific high-level signaling.令送。 Order to send.

In an optional implementation manner, a DMRS-UplinkConfig IE may be added to the RRC signaling to indicate the first DMRS generation parameter corresponding to the first resource area, in order to be consistent with the first resource area The DMRS generation parameters of external resources can be distinguished, and DMRS-UplinkConfig1 can be used. In another optional implementation manner, a new field may be added to the RRC signaling, and 1 bit is used to indicate whether it is the first DMRS generation parameter corresponding to the first resource area.

Specifically, the first DMRS generation parameters corresponding to the first resource regions of different cells may be different. Exemplarily, the first DMRS generation parameter corresponding to the first resource region of the first cell may be as shown in Table 2 below:

Table 2 The corresponding first DMRS generation parameter of the first resource region of the first cell

It should be noted that when the first resource area includes multiple areas, each area may also be configured with different DMRS parameters, which will not be described in detail here.

Step 303: The first network device sends a second message to the terminal device, where the second message includes a second DMRS generation parameter, and the second DMRS generation parameter is used to generate a second DMRS. The second DMRS corresponds to resources outside the first resource area.

In an optional implementation manner, the second message may be cell-specific high-level signaling, or terminal equipment-specific high-level signaling. For example, RRC signaling, MAC signaling, and so on.

In an optional implementation manner, the indication of the second DMRS generation parameter may be indicated by the RRC parameter DMRS-UplinkConfig according to the existing solution. For detailed indication information, please refer to 3GPP TS38.331. That is, DMRS-UplinkConfig indicates the second DMRS generation parameter; DMRS-UplinkConfig1 indicates the first DMRS generation parameter.

It should be noted that the first message and the second message may be different information elements of the same message, or may be different messages.

Step 304: The first network device sends a third message to the second network device, where the third message includes the first DMRS generation parameter corresponding to the first resource area of the first cell.

In an optional implementation manner, the third message includes the information of the first resource area, and the first network device receives the confirmation message from the second network device. In this way, the negotiation for the first resource area can be completed between the first network device and the second network device.

In another optional implementation manner, the first network device sends a notification message to the second network device, and the notification message includes the information of the first resource area; The second network device receives the confirmation message. Through the foregoing process, the first network device and the second network device can complete the negotiation for the first resource area.

It should be noted that when the first network device and the second network device are different network modules in the same base station, that is, in the case of Intra-site cooperation, messages or information are exchanged between cooperative cells in the site . When the first network device and the second network device are two base stations or network modules in two base stations, that is, inter-site cooperation, the base stations exchange messages or information through the Xn interface or the X2 interface .

Step 305: The terminal device generates a corresponding DMRS according to the first DMRS generation parameter and/or the second DMRS generation parameter.

In an optional implementation manner, the terminal device receives downlink control signaling from the first network device, where the downlink control signaling indicates the first scheduling resource;

When the first scheduling resource belongs to the first resource area, the terminal device generates a first DMRS corresponding to the first resource area according to the first DMRS parameter; and/or,

When the first scheduling resource does not belong to the first resource area, the terminal device generates the second DMRS according to the second DMRS parameter.

That is to say, there are three situations for the first scheduling resources: the first scheduling resources are all in the first resource area; the first scheduling resources are not in the first resource area; the first scheduling resources At the same time in the first resource area and outside the first resource area.

Specifically, when terminal device scheduling is performed in each cell, terminal devices with severe interference can be scheduled in the first resource area, which is beneficial to neighboring cell interference estimation.

Exemplarily, the downlink control signaling may be carried by DCI format0_0, DCI format0_1, etc.

In an optional implementation manner, when the waveform of the DMRS sequence is a DFT-S-OFDM waveform, the terminal device generates the first DMRS corresponding to the first resource area according to the first DMRS parameter, and the specific method is It may be that: the terminal device generates the first DMRS corresponding to the first resource region according to the first DMRS parameter and the RB allocation information of the first resource region.

When the waveform of the DMRS sequence is a DFT-S-OFDM waveform, the terminal device generates the second DMRS according to the second DMRS parameter. The specific method may be: the terminal device generates the second DMRS according to the second DMRS parameter and the The RB allocation information outside the first resource area generates the second DMRS.

Specifically, when the waveform of the DMRS sequence is a DFT-S-OFDM waveform, the length of the first DMRS and/or the second DMRS may be as follows:

In an exemplary case, when the first scheduling resource belongs to the first resource area, and the first scheduling resource is N ₁ RBs, the first scheduling resource generated according to the first DMRS parameter The length of DMRS satisfies the following formula 1:

Wherein, M1 is the length of the first DMRS;

Is the number of subcarriers included in one RB; δ is a fixed value; N _{1 is} less than or equal to M, and M is the number of RBs corresponding to the RB allocation information.

and / or,

When the first scheduling resource does not belong to the first resource area and the first scheduling resource is N ₂ RBs, the length of the second DMRS generated according to the second DMRS parameter satisfies the following formula 2 :

Wherein, M2 is the length of the second DMRS.

In another exemplary situation, when the RBs that the first scheduled resource belongs to the first resource region are N ₁ RBs, and the RBs that do not belong to the first resource region are N ₂ RBs, The total length of the first DMRS and the second DMRS satisfies the following formula 3:

Wherein, M3 is the total length of the first DMRS and the second DMRS;

Is the number of subcarriers included in one RB; δ is a fixed value; N _{1 is} less than or equal to M, and M is the number of RBs of the RB corresponding to the RB allocation information;

or,

The total length of the first DMRS and the second DMRS satisfies the following formula 4:

Wherein, M4 is the total length of the first DMRS and the second DMRS;

Is the number of subcarriers included in one RB; δ is a fixed value; M is the number of RBs corresponding to the RB allocation information.

Based on the above several situations, the following specifically introduces the method for generating the first DMRS and/or the second DMRS when the waveform of the DMRS sequence is a DFT-S-OFDM waveform:

In a specific example, it is assumed that the total number of RBs in the entire system bandwidth is L, the number of RBs in the first resource area is M, the number of RBs outside the first resource area is P, and the index of the RB Is sj(j=0,1,...,L-1). The RB index in the first resource area is

Where k=0,1,...,M-1,

Is the first RB index of the first resource area. Then the RB index included outside the first resource area is:

In the first resource area, the first DMRS generation formula may be the following formula 5:

In the above formula 5, n=0,1,...,M1-1, n is the index of each element in the DMRS, u∈{0,1,...,29} is the DMRS sequence group index, v is the number of base sequences in a certain sequence group; M1 is the length of the first DMRS, which conforms to the above formula 1; where, when the number of RBs allocated by the terminal equipment in the first resource area N1 is equal to M, then the first The length of a DMRS is

When N ₁ <M, the first DMRS length of the terminal device only takes the part in r(n), and the intercepted length is

Define the index _{of N 1} RB allocated to the terminal device satisfies

in

It is an index set _{of N 1 RBs.} RB index is

The first DMRS corresponding to the RB is

For PUSCH transmission, δ=1 and α=0. also,

The definition can conform to the following formula six:

in,

The value of N _ZC is the largest prime number smaller than M1. For u, its value is

f _gh indicates whether to perform sequence frequency hopping,

The value of is limited to the following two situations:

Case 1: When the upper layer configures the nPUSCH-Identity parameter, and the uplink grant (grant) information is neither a random access response (RAR) grant nor a DCI format0_0 scrambled for TC-RNTI, then

It is configured by the high-level nPUSCH-Identity parameter.

Situation 2:

That is, it is equal to the cell ID.

Because different cells and different terminal equipment can be configured with different

Then the DMRS generated by different cells has a certain degree of randomness.

In an optional implementation manner, if multiple terminal devices are allocated in the first resource area, as shown in FIG. 5, the first DMRS generated by each terminal device is related to the position and number of RBs. . In FIG. 5, it is assumed that the first resource area contains 8 RBs (M=8), the first terminal device is allocated the first 4 RBs in the first cell, and the third terminal device is allocated the last 4 RBs in the first cell. 4 RBs, and the second terminal device is allocated 8 RBs in the second cell. The first DMRS generated in the first resource region of the first cell is r ₁ (n), and the first DMRS sequence corresponding to the first terminal device is

And the first DMRS sequence corresponding to the third terminal device is

And the DMRS sequence corresponding to the second terminal device is

It can be seen from the DMRS generation method that as long as the first cell and the second cell know the starting position of the RB in the first resource area and the DMRS generation parameters, such as initial scrambling code parameters, the first cell can generate the second cell. The second cell corresponds to the DMRS sequence on each RB in the first resource area, and the second cell can also generate the DMRS sequence on each RB in the first cooperation area corresponding to the first cell. In this way, the first cell and the second cell can estimate each other's interference channels. It should be noted that the first cell corresponds to the first network device, and the first network device performs an action, and the second cell corresponds to the second network device, and the action is performed by the second network device, not the cell.

It should be noted that for different coordinated cells, the initialization parameters of the generated sequence r(n) may be different, including nPUSCH-Identity, cell ID, sequence group index u, base sequence index v, and so on. However, it is necessary to ensure that the parameters adopted by all RBs in the first resource area of a certain cell are consistent.

In another specific example, if none of the RBs allocated by the terminal device are in the first resource area, the method for generating the second DMRS may also conform to the above formula 6, except that n=0, 1,... , M2-1, M2 conform to the above formula two, and the details will not be described in detail here.

In another specific example, if the RB allocated by the terminal device is both in the first resource area and outside the first resource area, two sets of DMRS sequences (ie, the first DMRS and the second DMRS) need to be generated, such as Shown in Figure 6. In FIG. 6, it is assumed that the terminal device in the first cell (the first terminal device in FIG. 6) is allocated 10 RBs, of which 8 RBs are in the first resource area, and the other 2 RBs are in the first resource area. Outside the first resource area. The DMRS of the terminal device will be composed of the first DMRS in the first resource area and the second DMRS outside the first resource area. Specifically, the generation of the first DMRS in the first resource area still conforms to Formula 5, where M1 conforms to Formula 1 above. It is assumed that the number of RBs outside the first resource region is N2, for example, in FIG. 6, N2=2. Exemplarily, the formula for generating the DMRS sequence composed of the first DMRS and the second DMRS may still conform to the above formula 5, but n can be implemented in two ways, specifically:

Method 1: n=0,1,...,M3-1, M3 is the total length of the first DMRS and the second DMRS, which conforms to the above formula 3. For the N2 RBs outside the first resource region, the sequence corresponding to the N2 RBs in the sequence r(n) is intercepted. Define the index of N1 RB allocated to the terminal device to satisfy

in

It is an index set _{of N 1 RBs.} Define the index of N2 RBs allocated to the terminal equipment to satisfy

in

or

It is an index set of N2 RBs.

if

The sequence corresponding to the N2 RBs allocated to the terminal device is:

if

The sequence corresponding to the N2 RBs allocated to the terminal device is:

If the N2 RBs allocated to the terminal equipment are located on both sides of the first resource area, that is, N3 RBs satisfy

And another N2-N3 RB meet

Then the generated sequence of the second DMRS is:

Method 2: n=0,1,...,M4-1, M4 is the total length of the first DMRS and the second DMRS, which conforms to the above formula 4. For N2 RBs outside the first resource region, a sequence corresponding to N2 RBs in the sequence r(n) is intercepted. It is defined that the indexes of the M RBs allocated to the terminal device satisfy s _j (j=C ₀ , C ₀ +1,..., C ₀ +M1-1). Define the index of N2 RBs allocated to the terminal equipment to satisfy

in

or

Φ _N2 is an index set of N2 RBs.

if

The sequence corresponding to the N2 RBs allocated to the terminal device is (same method 1):

if

The sequence corresponding to the N2 RBs allocated to the terminal device is:

If the N2 RBs allocated to the terminal equipment are located on both sides of the first resource area, that is, N3 RBs satisfy

And another N2-N3 RB meet

Then the sequence for generating the second DMRS is:

When generating DMRS, the ZC sequence used by the DFT-S-OFDM waveform. The above describes the generation method when the waveform of the DMRS sequence is the DFT-S-OFDM waveform.

The following describes how the DMRS is generated when the waveform of the DMRS sequence is a CP-OFDM waveform. When generating DMRS, the CP-OFDM waveform uses the gold sequence.

In an optional implementation manner, it is also assumed that the total number of RBs in the entire system bandwidth is L, the number of RBs in the first resource region is M, and the number of RBs outside the first resource region is P. The RB index in the first resource area is

Where k=0,1,...,M,

Is the first RB index of the first resource area. Then the RB index included outside the first resource area is:

In the first resource area, the generation of the first DMRS may conform to the following formula 7:

Among them, c(i) is a pseudo-random sequence, which conforms to formula eight:

Among them, N _C =1600, x ₁ (n) can be initialized as x ₁ (0) = 1, x ₁ (n) = 0, n = 1, 2,..., 30, x ₂ (n) satisfies

Corresponding to the generation of the DMRS sequence of PUSCH, the _{definition of c init} can conform to the following formula 9:

Among them, l is the OFDM symbol index,

Is the number of time slots in a frame,

Is the number of symbols in a slot, n _SCID ∈ {0,1} is the DMRS sequence initialization parameter,

For the mask.

The value depends on different high-level parameter configurations, for example, the following three situations:

Case 1: When the upper layer configures the parameters scramblingID0 and scramblingID1, and the PUSCH is scheduled through DCI format0_1 or PUSCH based on other DCI format configurations,

Case 2: When the upper layer configures the parameter scramblingID0, and the PUSCH passes DCI format0_0, and it is scrambled by the CRC of C-RNTI,'MCS-C-RNTI, or CS-RNTI,

Case 3: If it is not the case of Case 1 and Case 2,

When the sequence r(n) obtained by formula 9 is mapped to each resource element (RE) on the time domain resource, the CP-OFDM waveform is mapped based on the full bandwidth, that is, the length of the sequence is based on the full bandwidth of the system The number of REs is generated instead of the number of RBs allocated by the terminal device, which is different from the way of generating DMRS sequences in the DFT-S-OFDM waveform. When a certain terminal device only allocates some of these RBs, the sequence corresponding to the subcarrier index is intercepted from r(n). For example, the definition of section 6.4.1.1.3 in the 3GPP TS 38.211 protocol is as follows:

The reference point for k is

-Subcarrier 0 in common resource block 0 if transform is not enabled, and

-Subcarrier 0 of the lowest-numbered resource block of the scheduled PUSCH

allocation if transform precoding is enabled.

In the above definition, when "transform precoding is not enabled" means the CP-OFDM waveform. In this embodiment, the definition of the sequence reference point still adopts the definition in the 3GPP TS 38.211 protocol. The first DMRS generation on the RBs in the first resource region generates the sequence r(n) based on the scramblingID0 and scramblingID1 configured in the first resource region, which has nothing to do with the number of RBs in the first resource region. When the RB index in the first resource area is

According to the rule of mapping each sequence to RE, the sequence on the corresponding RB can be obtained. The mapping rule of sequence to RE is expressed as (see 3GPP TS38.211) the following formula ten:

Among them, k is the frequency domain subcarrier (equivalent to RE) index, l is the time domain symbol index,

Is the port number index,

And the values of Δ are shown in Table 3 and Table 4 below. For example, when n=0 and k′=0, the first element of the sequence corresponds to the first subcarrier on the full bandwidth of the system. By analogy, the sequence value on each subcarrier in the first resource area can be obtained according to the mapping relationship of Formula 10.

table 3

Table 4

Specifically, outside the first resource area, the generation of the second DMRS may also conform to Formula 7, which will not be described in detail here. When the DMRS is generated in the CP-OFDM waveform, the DMRS generation rules in the first resource area and outside the first resource area are the same, the difference is only the DMRS sequence generation parameters, that is, there are two or more sets of initialization parameters, that is, the first resource area One set inside and one set outside the first resource area. The advantage of configuring the two sets of parameters is that on the one hand, it can ensure the interference randomization characteristics outside the first resource area, and on the other hand, it can generate the DMRS of each coordinated cell in the first resource area.

It should be noted that the first resource area may also be referred to as a cooperative area, and the outside of the first resource area may also be referred to as a non-cooperative area. Of course, there may be other names, which are not limited in this application.

Step 306: The terminal device sends the DMRS.

Specifically, the terminal device may send the first DMRS to the second network device, so that the second network device performs neighbor cell channel estimation.

Step 307: The second network device receives a first DMRS from a terminal device, and the first DMRS is generated based on the first DMRS generation parameter.

Step 308: The second network device estimates the channel information of the first cell according to the first DMRS generation parameter and the first DMRS.

By adopting the DMSR configuration method provided in this application, by dividing the same frequency domain resources for at least two cells, network devices can generate parameters of DMRS in the resource area of the cells covered by each other, so that the network devices can analyze the interference of neighboring cells. DMRS, in turn, can perform channel estimation for neighboring cells, which is beneficial for network equipment to suppress or eliminate interference in neighboring cells, thereby improving uplink edge user throughput and uplink cell average throughput.

Based on the above embodiment, an embodiment of the present application further provides a device. As shown in FIG. 7, the device 700 may include a transceiver unit 701 and a processing unit 702. The transceiving unit 701 is used for receiving information (or data) or sending information (or data) by the device 700, and the processing unit 702 is used for controlling and managing the actions of the device 700. The processing unit 702 may also control the steps executed by the processing unit 701.

Exemplarily, the apparatus 700 may be the first network device in the foregoing embodiment, and specifically may be a processor, or a chip or a chip system in the first network device, or a functional module, etc.; or, the apparatus 700 may be the terminal device in the foregoing embodiment, specifically may be a processor, or a chip or a chip system, or a functional module in the terminal device; or, the apparatus 700 may also be the first device in the foregoing embodiment. The second network device may specifically be a processor, or a chip or a chip system, or a functional module in the second network device.

In an embodiment, the apparatus 700 is the first network device in the foregoing embodiment. When the apparatus 700 implements the function of the first network device, it may specifically be:

The processing unit 702 is configured to obtain information of a first resource region of a first cell and a first DMRS generation parameter corresponding to the first resource region, where the first resource region is the same frequency domain resources of at least two cells , The at least two cells include the first cell; the transceiving unit 701 is configured to send a first message to a terminal device, where the first message includes the information of the first resource area and the first cell The first DMRS generation parameter corresponding to the resource area; and sending a second message to the terminal device, where the second message includes a second DMRS generation parameter, and the second DMRS generation parameter is used to generate a second DMRS DMRS, the second DMRS corresponding to resources outside the first resource area; and, sending a third message to the second network device, the third message including the first resource area corresponding to the first cell Of the first DMRS generation parameter.

In an optional implementation manner, the signal strength difference between any one cell of the at least two cells except the first cell and the first cell is less than a set threshold.

In an optional implementation manner, the transceiving unit 701 is further configured to: send downlink control signaling to the terminal device, where the downlink control signaling indicates a first scheduling resource, and the first scheduling resource Belonging to and/or not belonging to the first resource area.

In an optional implementation manner, the transceiving unit 701 is further configured to: send a notification message to the second network device, the notification message including the information of the first resource area; or the third message Includes the information of the first resource area; receiving a confirmation message from the second network device.

In an optional implementation manner, the information of the first resource region is resource block RB allocation information of the first resource region.

In another embodiment, the apparatus 700 is the terminal device in the foregoing embodiment. When the apparatus 700 implements the function of the terminal device, it may specifically be:

The transceiving unit 701 is configured to receive a first message through a first cell of a first network device, where the first message includes information about a first resource region and a first DMRS generation parameter corresponding to the first resource region, The first resource area is the same frequency domain resources of at least two cells, the at least two cells include the first cell; and, a second message is received from the first network device, wherein the The second message includes a second DMRS generation parameter, the second DMRS generation parameter is used to generate a second DMRS, and the second DMRS corresponds to a resource outside the first resource area; the processing unit 702 is configured to The first DMRS generation parameter and/or the second DMRS generation parameter generate a corresponding DMRS; the transceiver unit 701 is further configured to send the DMRS.

In an optional implementation manner, the signal strength difference between any one cell of the at least two cells except the first cell and the first cell is less than a set threshold.

In an optional implementation manner, the transceiving unit 701 is further configured to receive downlink control signaling from the first network device, where the downlink control signaling indicates the first scheduling resource; the processing unit 702, It is also used to generate the first DMRS corresponding to the first resource area according to the first DMRS parameter when the first scheduling resource belongs to the first resource area; and/or, when the first scheduling resource is not Belonging to the first resource area, and generating the second DMRS according to the second DMRS parameter.

In an optional implementation manner, the information of the first resource region is resource block RB allocation information of the first resource region.

In an optional implementation manner, when the waveform of the DMRS sequence is an Orthogonal Frequency Division Multiplexing DFT-S-OFDM waveform extended based on discrete Fourier transform, the processing unit 702 is configured according to the first DMRS parameter When generating the first DMRS corresponding to the first resource region, it is specifically configured to generate the first DMRS corresponding to the first resource region according to the first DMRS parameter and the RB allocation information.

In an optional implementation manner, when the first scheduling resource belongs to the first resource area, and the first scheduling resource is N ₁ RBs, the first scheduling resource generated according to the first DMRS parameter The length of a DMRS satisfies the following formula:

Wherein, M1 is the length of the first DMRS;

Is the number of subcarriers included in one RB; δ is a fixed value; N _{1 is} less than or equal to M, and M is the number of RBs corresponding to the RB allocation information;

and / or,

When the first scheduling resource does not belong to the first resource area and the first scheduling resource is N ₂ RBs, the length of the second DMRS generated according to the second DMRS parameter satisfies the following formula:

Wherein, M2 is the length of the second DMRS.

In an optional implementation manner, when the RBs of the first scheduling resource belonging to the first resource region are N ₁ RBs, and the RBs not belonging to the first resource region are N ₂ RBs, The total length of the first DMRS and the second DMRS satisfies the following formula:

Wherein, M3 is the total length of the first DMRS and the second DMRS;

Is the number of subcarriers included in one RB; δ is a fixed value; N _{1 is} less than or equal to M, and M is the number of RBs of the RB corresponding to the RB allocation information;

or,

The total length of the first DMRS and the second DMRS satisfies the following formula:

Wherein, M4 is the total length of the first DMRS and the second DMRS;

Is the number of subcarriers included in one RB; δ is a fixed value; M is the number of RBs corresponding to the RB allocation information.

In another embodiment, the apparatus 700 is the second network device in the foregoing embodiment. When the apparatus 700 implements the function of the second network device, it may specifically be:

The transceiving unit 701 is configured to receive a third message from a first network device, the third message including a first DMRS generation parameter corresponding to a first resource area, and the first resource area is the same frequency of at least two cells. Domain resources, the at least two cells include the first cell; and, receiving a first DMRS from a terminal device, and the first DMRS is generated based on the first DMRS generation parameter; the processing unit 702 is configured to The first DMRS generation parameter and the first DMRS estimate channel information of the first cell.

In an optional implementation manner, the signal strength difference between any one cell of the at least two cells except the first cell and the first cell is less than a set threshold.

In an optional implementation manner, the transceiving unit 701 is further configured to: receive a notification message from the first network device, the notification message of the information of the first resource area; or the third message Includes the information of the first resource area; and sends a confirmation message to the first network device.

In an optional implementation manner, the information of the first resource region is resource block RB allocation information of the first resource region.

It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation. The functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , Including a number of instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

Based on the above embodiment, an embodiment of the present application also provides a device. As shown in FIG. 8, the device 800 may include a transceiver 801 and a processor 802. Optionally, the device 800 may further include a memory 803. Wherein, the memory 803 may be provided inside the device 800, or may be provided outside the device 800. Wherein, the processor 802 can control the transceiver 801 to receive and send data.

Specifically, the processor 802 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP. The processor 802 may further include a hardware chip. The above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

Wherein, the transceiver 801, the processor 802, and the memory 803 are connected to each other. Optionally, the transceiver 801, the processor 802, and the memory 803 are connected to each other through a bus 804; the bus 804 may be a Peripheral Component Interconnect (PCI) bus or an extended industry standard Structure (Extended Industry Standard Architecture, EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, only one thick line is used in FIG. 8, but it does not mean that there is only one bus or one type of bus.

In an optional implementation manner, the memory 803 is used to store programs and the like. Specifically, the program may include program code, and the program code includes computer operation instructions. The memory 803 may include RAM, or may also include non-volatile memory, such as one or more disk memories. The processor 802 executes the application program stored in the memory 803 to realize the above-mentioned functions, thereby realizing the functions of the device 800.

Exemplarily, the apparatus 800 may be the first network device, the terminal device, or the second network device in the foregoing embodiment.

In an embodiment, the apparatus 800 is the first network device in the foregoing embodiment. When the apparatus 800 implements the function of the first network device, it may specifically be:

The processor 802 is configured to obtain information of a first resource region of a first cell and a first DMRS generation parameter corresponding to the first resource region, where the first resource region is the same frequency domain resources of at least two cells , The at least two cells include the first cell; the transceiver 801 is configured to send a first message to a terminal device, where the first message includes the information of the first resource area and is related to the first cell. The first DMRS generation parameter corresponding to the resource area; and sending a second message to the terminal device, where the second message includes a second DMRS generation parameter, and the second DMRS generation parameter is used to generate a second DMRS DMRS, the second DMRS corresponding to resources outside the first resource area; and, sending a third message to the second network device, the third message including the first resource area corresponding to the first cell Of the first DMRS generation parameter.

In an optional implementation manner, the signal strength difference between any one cell of the at least two cells except the first cell and the first cell is less than a set threshold.

In an optional implementation manner, the transceiver 801 is further configured to: send downlink control signaling to the terminal device, where the downlink control signaling indicates a first scheduling resource, and the first scheduling resource Belonging to and/or not belonging to the first resource area.

In an optional implementation manner, the transceiver 801 is further configured to: send a notification message to the second network device, the notification message including the information of the first resource area; or the third message Includes the information of the first resource area; receiving a confirmation message from the second network device.

In an optional implementation manner, the information of the first resource region is resource block RB allocation information of the first resource region.

In another embodiment, the apparatus 800 is the terminal device in the foregoing embodiment. When the apparatus 800 implements the function of the terminal device, it may specifically be:

The transceiver 801 is configured to receive a first message through a first cell of a first network device, where the first message includes information of a first resource area and a first DMRS generation parameter corresponding to the first resource area, The first resource area is the same frequency domain resources of at least two cells, the at least two cells include the first cell; and, a second message is received from the first network device, wherein the The second message includes a second DMRS generation parameter, the second DMRS generation parameter is used to generate a second DMRS, and the second DMRS corresponds to a resource outside the first resource area; the processor 802 is configured to generate a second DMRS according to the The first DMRS generation parameter and/or the second DMRS generation parameter generate a corresponding DMRS; the transceiver 801 is also configured to send the DMRS.

In an optional implementation manner, the signal strength difference between any one cell of the at least two cells except the first cell and the first cell is less than a set threshold.

In an optional implementation manner, the transceiver 801 is further configured to receive downlink control signaling from a first network device, where the downlink control signaling indicates a first scheduling resource; the processor 802, It is also used to generate the first DMRS corresponding to the first resource area according to the first DMRS parameter when the first scheduling resource belongs to the first resource area; and/or, when the first scheduling resource is not Belonging to the first resource area, and generating the second DMRS according to the second DMRS parameter.

In an optional implementation manner, the information of the first resource region is resource block RB allocation information of the first resource region.

In an optional implementation manner, when the waveform of the DMRS sequence is an orthogonal frequency division multiplexing DFT-S-OFDM waveform based on discrete Fourier transform expansion, the processor 802 is configured according to the first DMRS parameter When generating the first DMRS corresponding to the first resource region, it is specifically configured to generate the first DMRS corresponding to the first resource region according to the first DMRS parameter and the RB allocation information.

In an optional implementation manner, when the first scheduling resource belongs to the first resource area, and the first scheduling resource is N ₁ RBs, the first scheduling resource generated according to the first DMRS parameter The length of a DMRS satisfies the following formula:

Wherein, M1 is the length of the first DMRS;

Is the number of subcarriers included in one RB; δ is a fixed value; N _{1 is} less than or equal to M, and M is the number of RBs corresponding to the RB allocation information;

and / or,

When the first scheduling resource does not belong to the first resource area and the first scheduling resource is N ₂ RBs, the length of the second DMRS generated according to the second DMRS parameter satisfies the following formula:

Wherein, M2 is the length of the second DMRS.

In an optional implementation manner, when the RBs of the first scheduling resource belonging to the first resource region are N ₁ RBs, and the RBs not belonging to the first resource region are N ₂ RBs, The total length of the first DMRS and the second DMRS satisfies the following formula:

Wherein, M3 is the total length of the first DMRS and the second DMRS;

Is the number of subcarriers included in one RB; δ is a fixed value; N _{1 is} less than or equal to M, and M is the number of RBs of the RB corresponding to the RB allocation information;

or,

The total length of the first DMRS and the second DMRS satisfies the following formula:

Wherein, M4 is the total length of the first DMRS and the second DMRS;

Is the number of subcarriers included in one RB; δ is a fixed value; M is the number of RBs corresponding to the RB allocation information.

In another embodiment, the apparatus 800 is the second network device in the foregoing embodiment, and when the apparatus 800 implements the function of the second network device, it may specifically be:

The transceiver 801 is configured to receive a third message from a first network device, the third message including a first DMRS generation parameter corresponding to a first resource area, and the first resource area is the same frequency of at least two cells. Domain resources, the at least two cells include the first cell; and, receiving a first DMRS from a terminal device, where the first DMRS is generated based on the first DMRS generation parameter; and the processor 802 is configured to The first DMRS generation parameter and the first DMRS estimate channel information of the first cell.

In an optional implementation manner, the signal strength difference between any one cell of the at least two cells except the first cell and the first cell is less than a set threshold.

In an optional implementation manner, the transceiver 801 is further configured to: receive a notification message from the first network device, the notification message of the information of the first resource area; or the third message Includes the information of the first resource area; and sends a confirmation message to the first network device.

In an optional implementation manner, the information of the first resource region is resource block RB allocation information of the first resource region.

Based on the above embodiment, when the device in the embodiment of the present application is a network device (that is, the above-mentioned first network device or the second network device), the device may be as shown in FIG. 9. The device 900 includes one or more radio frequency units, such as a remote radio unit (RRU) 910 and one or more baseband units (BBU) (also referred to as digital units, digital units, DU) 920 . The RRU 910 may be called a transceiving unit, which corresponds to the transceiving unit 701 in FIG. 7. Optionally, the transceiver unit may also be called a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 911 and a radio frequency unit 912. The RRU910 part is mainly used for receiving and sending radio frequency signals and conversion between radio frequency signals and baseband signals, for example, for sending instruction information to terminal equipment. The BBU910 part is mainly used to perform baseband processing, control the base station, and so on. The RRU 910 and the BBU 920 may be physically set together, or may be physically separated, that is, a distributed base station.

The BBU 920 is the control center of the base station, and may also be called a processing unit, which may correspond to the processing unit 702 in FIG. 7, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading. For example, the BBU (processing unit) may be used to control the base station to execute the operation procedure of the network device (the first network device or the second network device) in the foregoing method embodiment.

In an example, the BBU 920 may be composed of one or more single boards, and multiple single boards may jointly support a wireless access network with a single access standard (such as an LTE network), or can respectively support wireless access networks with different access standards. Access network (such as LTE network, 5G network or other networks). The BBU 920 further includes a memory 921 and a processor 922. The memory 921 is used to store necessary instructions and data. The processor 922 is configured to control the base station to perform necessary actions, for example, to control the base station to execute the operation procedure of the network device in the foregoing method embodiment. The memory 921 and the processor 922 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.

Based on the above embodiments, the embodiments of the present application provide a communication system, and the communication system may include the first network device, the terminal device, and the second network device involved in the above embodiment.

The embodiments of the present application also provide a computer-readable storage medium, which is used to store a computer program. When the computer program is executed by a computer, the computer can implement the method shown in FIG. 3 provided by the above-mentioned method embodiment. The process related to the first network device, the terminal device, or the second network device in the embodiment.

The embodiment of the present application also provides a computer program product, the computer program product is used to store a computer program, when the computer program is executed by a computer, the computer can implement the embodiment shown in FIG. 3 provided by the above method embodiment A process related to the first network device, terminal device, or second network device.

Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

This application is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to this application without departing from the protection scope of this application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, then this application is also intended to include these modifications and variations.

Claims (36)

1. A demodulation reference signal DMRS configuration method is characterized in that it includes:

   Acquire information about the first resource region of the first cell and the first DMRS generation parameter corresponding to the first resource region, where the first resource region is the same frequency domain resources of at least two cells, and the at least two The cell includes the first cell;

   Sending a first message to the terminal device, where the first message includes the information of the first resource area and the first DMRS generation parameter corresponding to the first resource area;

   Send a second message to the terminal device, where the second message includes a second DMRS generation parameter, the second DMRS generation parameter is used to generate a second DMRS, and the second DMRS corresponds to the first resource Resources outside the region;

   Send a third message to the second network device, where the third message includes the first DMRS generation parameter corresponding to the first resource region of the first cell.
2. The method according to claim 1, wherein the signal strength difference between any one of the at least two cells except the first cell and the first cell is less than a set threshold.
3. The method according to claim 1 or 2, wherein the method further comprises:

   Sending downlink control signaling to the terminal device, where the downlink control signaling indicates a first scheduling resource, and the first scheduling resource belongs to and/or does not belong to the first resource area.
4. The method according to any one of claims 1-3, wherein the method further comprises:

   Sending a notification message to the second network device, where the notification message includes information about the first resource area; or the third message includes information about the first resource area;

   A confirmation message is received from the second network device.
5. The method according to any one of claims 1-4, wherein:

   The information of the first resource region is resource block RB allocation information of the first resource region.
6. A demodulation reference signal DMRS configuration method is characterized in that it includes:

   A first message is received through the first cell of the first network device, where the first message includes information about the first resource area and a first DMRS generation parameter corresponding to the first resource area, and the first resource area At least two cells have the same frequency domain resources, and the at least two cells include the first cell;

   A second message is received from the first network device, where the second message includes a second DMRS generation parameter, the second DMRS generation parameter is used to generate a second DMRS, and the second DMRS corresponds to the first DMRS A resource outside the resource area;

   Generate a corresponding DMRS according to the first DMRS generation parameter and/or the second DMRS generation parameter;

   Send the DMRS.
7. 7. The method according to claim 6, wherein the signal strength difference between any one of the at least two cells except the first cell and the first cell is less than a set threshold.
8. The method according to claim 6 or 7, wherein the method further comprises:

   Receiving downlink control signaling from the first network device, where the downlink control signaling indicates the first scheduling resource;

   When the first scheduling resource belongs to the first resource area, generate a first DMRS corresponding to the first resource area according to the first DMRS parameter; and/or,

   When the first scheduled resource does not belong to the first resource area, the second DMRS is generated according to the second DMRS parameter.
9. The method of claim 8, wherein:

   The information of the first resource region is resource block RB allocation information of the first resource region.
10. The method according to claim 9, wherein when the waveform of the DMRS sequence is an orthogonal frequency division multiplexing DFT-S-OFDM waveform based on discrete Fourier transform expansion, the first DMRS parameter is generated according to the first DMRS parameter. The first DMRS corresponding to a resource area includes:

    The first DMRS corresponding to the first resource region is generated according to the first DMRS parameter and the RB allocation information.
11. The method of claim 10, wherein:

    When the first scheduling resource belongs to the first resource area, and the first scheduling resource is N ₁ RB, the length of the first DMRS generated according to the first DMRS parameter satisfies the following formula:

    

    Wherein, M1 is the length of the first DMRS;

    

    Is the number of subcarriers included in one RB; δ is a fixed value; N _{1 is} less than or equal to M, and M is the number of RBs corresponding to the RB allocation information;

    and / or,

    When the first scheduling resource does not belong to the first resource area and the first scheduling resource is N ₂ RBs, the length of the second DMRS generated according to the second DMRS parameter satisfies the following formula:

    

    Wherein, M2 is the length of the second DMRS.
12. The method according to claim 10 or 11, wherein when the first scheduled resource belongs to the first resource region, the number of RBs is N ₁ RB, and the number of RBs not belonging to the first resource region is N _{When there are 2} RBs, the total length of the first DMRS and the second DMRS satisfies the following formula:

    

    Wherein, M3 is the total length of the first DMRS and the second DMRS;

    

    Is the number of subcarriers included in one RB; δ is a fixed value; N _{1 is} less than or equal to M, and M is the number of RBs of the RB corresponding to the RB allocation information;

    or,

    The total length of the first DMRS and the second DMRS satisfies the following formula:

    

    Wherein, M4 is the total length of the first DMRS and the second DMRS;

    

    Is the number of subcarriers included in one RB; δ is a fixed value; M is the number of RBs corresponding to the RB allocation information.
13. A demodulation reference signal DMRS configuration method is characterized in that it includes:

    A third message is received from the first network device, the third message includes the first DMRS generation parameter corresponding to the first resource region, the first resource region is the same frequency domain resources of at least two cells, and the at least The two cells include the first cell;

    Receiving a first DMRS from a terminal device, where the first DMRS is generated based on the first DMRS generation parameter;

    Estimating the channel information of the first cell according to the first DMRS generation parameter and the first DMRS.
14. The method according to claim 13, wherein the signal strength difference between any one of the at least two cells except the first cell and the first cell is less than a set threshold.
15. The method according to claim 13 or 14, wherein the method further comprises:

    Receiving a notification message from the first network device, the notification message including the information of the first resource area; or the third message including the information of the first resource area;

    Sending a confirmation message to the first network device.
16. The method according to claim 15, wherein the information of the first resource region is resource block RB allocation information of the first resource region.
17. A device, characterized in that it comprises:

    A processing unit, configured to obtain information about a first resource region of a first cell and a first DMRS generation parameter corresponding to the first resource region, where the first resource region is the same frequency domain resources of at least two cells, The at least two cells include the first cell;

    A transceiving unit, configured to send a first message to a terminal device, where the first message includes information of the first resource area and the first DMRS generation parameter corresponding to the first resource area; and

    Send a second message to the terminal device, where the second message includes a second DMRS generation parameter, the second DMRS generation parameter is used to generate a second DMRS, and the second DMRS corresponds to the first resource Resources outside the region; and

    Send a third message to the second network device, where the third message includes the first DMRS generation parameter corresponding to the first resource region of the first cell.
18. The apparatus according to claim 17, wherein the signal strength difference between any cell other than the first cell in the at least two cells and the first cell is less than a set threshold.
19. The device according to claim 17 or 18, wherein the transceiver unit is further configured to:

    Sending downlink control signaling to the terminal device, where the downlink control signaling indicates a first scheduling resource, and the first scheduling resource belongs to and/or does not belong to the first resource area.
20. The device according to any one of claims 17-19, wherein the transceiver unit is further configured to:

    Sending a notification message to the second network device, where the notification message includes information about the first resource area; or the third message includes information about the first resource area;

    A confirmation message is received from the second network device.
21. The apparatus according to any one of claims 17-20, wherein the information of the first resource region is resource block RB allocation information of the first resource region.
22. A device, characterized in that it comprises:

    The transceiving unit is configured to receive a first message through the first cell of the first network device, where the first message includes the information of the first resource area and the first DMRS generation parameter corresponding to the first resource area, so The first resource area is the same frequency domain resources of at least two cells, and the at least two cells include the first cell; and

    A second message is received from the first network device, where the second message includes a second DMRS generation parameter, the second DMRS generation parameter is used to generate a second DMRS, and the second DMRS corresponds to the first DMRS A resource outside the resource area;

    A processing unit, configured to generate a corresponding DMRS according to the first DMRS generation parameter and/or the second DMRS generation parameter;

    The transceiver unit is also used to send the DMRS.
23. The apparatus according to claim 22, wherein the signal strength difference between any one of the at least two cells except the first cell and the first cell is less than a set threshold.
24. The device according to claim 22 or 23, wherein:

    The transceiving unit is further configured to receive downlink control signaling from the first network device, where the downlink control signaling indicates the first scheduling resource;

    The processing unit is further configured to generate a first DMRS corresponding to the first resource area according to the first DMRS parameter when the first scheduling resource belongs to the first resource area; and/or when the The first scheduling resource does not belong to the first resource area, and the second DMRS is generated according to the second DMRS parameter.
25. The apparatus according to claim 24, wherein the information of the first resource region is resource block RB allocation information of the first resource region.
26. The apparatus according to claim 25, wherein, when the waveform of the DMRS sequence is an orthogonal frequency division multiplexing DFT-S-OFDM waveform based on discrete Fourier transform expansion, the processing unit performs processing according to the first When the DMRS parameters generate the first DMRS corresponding to the first resource area, they are specifically used to:

    The first DMRS corresponding to the first resource region is generated according to the first DMRS parameter and the RB allocation information.
27. The device of claim 26, wherein:

    When the first scheduling resource belongs to the first resource area, and the first scheduling resource is N ₁ RB, the length of the first DMRS generated according to the first DMRS parameter satisfies the following formula:

    

    Wherein, M1 is the length of the first DMRS;

    

    Is the number of subcarriers included in one RB; δ is a fixed value; N _{1 is} less than or equal to M, and M is the number of RBs corresponding to the RB allocation information;

    and / or,

    When the first scheduling resource does not belong to the first resource area and the first scheduling resource is N ₂ RBs, the length of the second DMRS generated according to the second DMRS parameter satisfies the following formula:

    

    Wherein, M2 is the length of the second DMRS.
28. The apparatus according to claim 26 or 27, wherein when the first scheduled resource belongs to the first resource region, the number of RBs is N ₁ RB, and the number of RBs not belonging to the first resource region is N _{When there are 2} RBs, the total length of the first DMRS and the second DMRS satisfies the following formula:

    

    Wherein, M3 is the total length of the first DMRS and the second DMRS;

    

    Is the number of subcarriers included in one RB; δ is a fixed value; N _{1 is} less than or equal to M, and M is the number of RBs of the RB corresponding to the RB allocation information;

    or,

    The total length of the first DMRS and the second DMRS satisfies the following formula:

    

    Wherein, M4 is the total length of the first DMRS and the second DMRS;

    

    Is the number of subcarriers included in one RB; δ is a fixed value; M is the number of RBs corresponding to the RB allocation information.
29. A device, characterized in that it comprises:

    The transceiving unit is configured to receive a third message from the first network device, the third message including the first DMRS generation parameter corresponding to the first resource area, and the first resource area is the same frequency domain of at least two cells Resources, the at least two cells include the first cell; and

    Receiving a first DMRS from a terminal device, where the first DMRS is generated based on the first DMRS generation parameter;

    The processing unit is configured to estimate the channel information of the first cell according to the first DMRS generation parameter and the first DMRS.
30. The apparatus according to claim 29, wherein the signal strength difference between any cell other than the first cell in the at least two cells and the first cell is less than a set threshold.
31. The device according to claim 29 or 30, wherein the transceiver unit is further configured to:

    Receiving a notification message from the first network device, where the notification message includes information about the first resource area; or the third message includes information about the first resource area;

    Sending a confirmation message to the first network device.
32. The apparatus according to claim 31, wherein the information of the first resource region is resource block RB allocation information of the first resource region.
33. A device, characterized by comprising: a transceiver and a processor, wherein:

    The transceiver is used to send and receive data;

    The processor is configured to execute the method according to any one of claims 1-5.
34. A device, characterized by comprising: a transceiver and a processor, wherein:

    The transceiver is used to send and receive data;

    The processor is configured to execute the method according to any one of claims 6-12.
35. A device, characterized by comprising: a transceiver and a processor, wherein:

    The transceiver is used to send and receive data;

    The processor is configured to execute the method according to any one of claims 13-16.
36. A computer-readable storage medium, characterized by comprising a program or instruction, which when running on a computer, causes the computer to execute the method according to any one of claims 1-5, or execute the method as claimed in claims 6-12 The method according to any one, or the method according to any one of claims 13-16 is executed.

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