WO2020248691A1

WO2020248691A1 - Reference signal resource allocation method and device

Info

Publication number: WO2020248691A1
Application number: PCT/CN2020/084439
Authority: WO
Inventors: 毕程; 蒋创新; 肖华华
Original assignee: 中兴通讯股份有限公司
Priority date: 2019-06-14
Filing date: 2020-04-13
Publication date: 2020-12-17
Also published as: CN111083739A

Abstract

The present application provides a reference signal resource allocation method and device. The method comprises: a transmitter node classifies the reference signal resources into first-level reference signal resources and N-level reference signal resources, N being a positive integer greater than 1; the transmitter node sets pseudo randomized identifiers in resource blocks of the N-level reference signal resources, wherein the randomized identifiers are used for eliminating the correspondences between reference signal sequences and time domain symbol positions in the resource blocks of the N-level reference signal resources. The present application solves the problem in the related art of difficulty in implementing differentiated classification services by means of reference signal generation, and achieves the effect of implementing reference signals for differentiated services.

Description

Reference signal resource allocation method and device

Technical field

The present disclosure relates to the field of communications, and in particular, to a method and device for allocating reference signal resources.

Background technique

Reference signals play an important role in wireless communication systems. Wireless positioning reference signals (Positioning Reference Signal, referred to as PRS) have been introduced into the LTE system since Rel-9 and used for positioning based on the communication network. Positioning reference signals will continue to be introduced in 5G, and standardization work is in progress.

The application of millimeter wave bands is a new feature of 5G. Due to the characteristics of millimeter waves, the use of beam polling in high frequency bands is a common method to enhance coverage. The time domain density of the beam will affect the coverage and signal strength of the positioning reference signal, thereby affecting the positioning accuracy. Frequency domain bandwidth is also an important factor affecting positioning accuracy.

At the same time, different terminals from different industries have different requirements for positioning accuracy. Providing positioning services with different accuracy for different users is also a new requirement for 5G systems, and it is also an opportunity for operators to bring new charging services. However, the traditional reference signal generation method is difficult to achieve differentiated hierarchical services, and it becomes more difficult after the terminal can perform location calculation and is supported. A more straightforward solution is to provide different PRS configuration information for different users. However, the transmitting reference signal of the transmitting end node is a collection of all user positioning reference signal configurations. The reference signals for low-level services and high-level services will be transmitted at the same time. If different bandwidth configurations are used to configure different levels of positioning for different users With the service, users can easily infer the configuration information of larger bandwidth to obtain higher-level positioning reference signal configuration. Even if different positioning services are distinguished by different density configuration information in the time domain, users can easily infer the possible positioning reference signal sequences and possible time domain positions of other time domain positions through the positioning reference signal generation formula. None of the existing reference signal generation methods can solve this problem. Therefore, there is no better solution to the problem that it is difficult to achieve differentiated hierarchical services through reference signal generation in related technologies.

Public content

The embodiments of the present disclosure provide a reference signal resource allocation method and device, so as to at least solve the problem of difficulty in realizing differentiated hierarchical services through reference signal generation in related technologies.

According to an embodiment of the present disclosure, a method for resource allocation of reference signals is provided, which includes: a transmitting end node classifies reference signal resources into a first-level reference signal resource and an N-level reference signal resource; A pseudo-randomization identifier is set in the resource block of the N-level reference signal resource, where the randomization identifier is used to eliminate the correspondence between the reference signal sequence and the time domain symbol position in the resource block of the N-level reference signal resource, N is a positive integer greater than 1.

According to an embodiment of the present disclosure, there is provided a reference signal resource allocation device, which is located in a transmitting end node. The device includes: a classification module configured to classify reference signal resources into first-level reference signal resources and N-level reference Signal resource; a configuration module configured to set a pseudo-randomization identifier in the resource block of the N-level reference signal resource, wherein the randomization identifier is used to eliminate the reference signal sequence in the resource block of the N-level reference signal resource Correspondence with the position of the time domain symbol, N is a positive integer greater than 1.

According to yet another embodiment of the present disclosure, there is also provided a storage medium in which a computer program is stored, wherein the computer program is configured to execute the steps in any one of the above method embodiments when running.

According to another embodiment of the present disclosure, there is also provided an electronic device, including a memory and a processor, the memory stores a computer program, and the processor is configured to run the computer program to execute any one of the foregoing Steps in the method embodiment.

Through the present disclosure, different levels of reference signal resources are allocated for services with different precisions. At the same time, for high-precision services, a variable pseudo-randomized identifier that can eliminate the correspondence between the reference signal sequence and the position of the time domain symbol is set. Therefore, the problem that it is difficult to realize differentiated hierarchical services through reference signal generation in related technologies can be solved, and the effect of realizing reference signals for differentiated services can be achieved.

Description of the drawings

The drawings described here are used to provide a further understanding of the present disclosure and constitute a part of the present application. The exemplary embodiments of the present disclosure and their descriptions are used to explain the present disclosure, and do not constitute an improper limitation of the present disclosure. In the attached picture:

Fig. 1 is a flowchart of a method for resource allocation of reference signals according to an embodiment of the present disclosure;

Fig. 2 is a schematic diagram of a reference signal resource according to an embodiment of the present disclosure;

Fig. 3 is a schematic diagram of another reference signal resource according to an embodiment of the present disclosure;

Fig. 4 is a structural diagram of a system for realizing a positioning reference service according to an embodiment of the present disclosure;

Fig. 5 is a structural block diagram of a reference signal resource allocation device according to an embodiment of the present disclosure.

Detailed ways

Hereinafter, the present disclosure will be described in detail with reference to the drawings and in conjunction with embodiments. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other if there is no conflict.

It should be noted that the terms "first" and "second" in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence.

Example 1

In this embodiment, a reference signal resource allocation method is provided. FIG. 1 is a flowchart of a reference signal resource allocation method according to an embodiment of the present disclosure. As shown in FIG. 1, the process includes the following steps:

Step S102, the transmitting end node classifies the reference signal resource into a first-level reference signal resource and an N-level reference signal resource, where N is a positive integer greater than 1.

Step S104: The transmitting end node sets a pseudo-randomization identifier in the resource block of the N-level reference signal resource, where the randomization identifier is used to eliminate the reference signal sequence in the resource block of the N-level reference signal resource Correspondence with the position of the time domain symbol.

In at least one exemplary embodiment, the transmitting end node setting a pseudo-randomization identifier in the resource block of the N-level reference signal resource includes: the transmitting end node is generating the resource of the N-level reference signal resource The parameter of the pseudo-randomization identifier is added to the initial value of the sequence of the reference signal sequence of the block.

In at least one exemplary embodiment, the reference signal sequence on each time domain symbol in each resource block in the N-level reference signal resource and the reference signal on each time domain symbol in each resource block in the non-N-level reference signal resource The sequence is different.

Fig. 2 is a schematic diagram of a reference signal resource according to an embodiment of the present disclosure. As shown in Figure 2, different patterns in the figure represent different sequences. The transmitting end node divides the reference signal resources in a reference signal interval into two levels, one level and two levels. Specifically, the oblique line is the first-level service reference signal resource. The cross-line part is the reference signal resource of the secondary service. The blanks are other reference signal resources. There are 2 reference signal resource sequences in each service reference signal resource.

The reference signal sent by each symbol in each reference signal resource block serving the first-level positioning requirement corresponds to the same. As an example, the reference signal sequence is generated by the following formula:

The sequence c(i) is generated by 3GPP TS 38.211 section 5.2.1, and x is related to the frequency domain resource mapping density of the sequence.

Is the maximum transmission bandwidth of the reference signal.

As an example, the initial value of the primary reference signal sequence can be generated in the following manner:

or,

among them

Is the number of time slots in a radio frame, l is the symbol index in a time slot,

Is the number of symbols contained in a reference signal resource block, s _i is the position of the first symbol of the corresponding reference signal resource block,

The reference signal identifier used to generate the initial value.

The reference signal sequence transmitted by each symbol of each reference signal resource block serving the second-level positioning requirements corresponds to each other, but is different from the reference signal sequence of the resource block used for the first-level positioning service. As one of the examples, it serves the second-level positioning service. The initial value of the reference signal sequence required for positioning is generated by one of the following methods:

or,

or,

among them

It is a pseudo-random identification defined at the symbol level. The symbols in each reference signal resource use an independent pseudo-random identification.

In at least one exemplary embodiment, when the reference signal resource is a positioning reference signal resource, the method further includes: the transmitting end node sends resource configuration information to the positioning server, where the resource configuration information includes : The classification information of the first-level reference signal resource and the N-level reference signal resource; the resource information of the N-level reference signal resource carrying the pseudo-randomization identifier; and the law of change corresponding to the randomization identifier information.

In at least one exemplary embodiment, the method further includes: receiving a positioning service request sent by the target node, analyzing and determining the requested positioning reference signal resource type; sending a resource configuration corresponding to the requested positioning reference signal resource type Information to the target node.

In at least one exemplary embodiment, the sending resource configuration information corresponding to the requested positioning reference signal resource type to the target node includes: when it is determined that the requested positioning reference signal resource type is the first level When the reference signal resource is used, the target node sends the resource configuration information corresponding to the first-level reference signal resource to the target node; when it is determined that the requested positioning reference signal resource type is the N-level reference signal resource, The target node sends resource configuration information corresponding to the N-level reference signal resources and resource configuration information corresponding to the reference signal resources below the N level to the target node.

In at least one exemplary embodiment, the method further includes: within the change period of the pseudo-randomization identifier, sending the updated pseudo-randomization identifier to the corresponding N-level reference signal resource Target node.

In at least one exemplary embodiment, both the first-level reference signal resource and the N-level reference signal resource include at least: a resource block identifier of the reference signal resource; a reference signal sequence identifier of the reference signal resource , The time domain density of the resource block of the reference signal resource, the frequency domain density of the resource block of the reference signal resource, the bandwidth of the reference signal resource, and the number of time domain symbols in the reference signal resource.

Fig. 3 is a schematic diagram of another reference signal resource according to an embodiment of the present disclosure. As shown in Figure 3, different patterns in Figure 3 represent different sequences. The transmitting end node divides the reference signal resources in a reference signal interval into two levels, one and two and three levels. Specifically, the oblique line is the reference signal resource of the first-level positioning service. The cross line part is the reference signal resource of the secondary positioning service. The lattice part is the reference signal resource of the three-level positioning service. There are two reference signal resource sequences in the primary and secondary positioning service reference signal resources. There is one reference signal resource sequence in the three-level positioning service reference signal resource.

Fig. 4 is a structural diagram of a system for implementing a positioning reference service according to an embodiment of the present disclosure. As shown in FIG. 4, it includes: a transmitting end node 42, a positioning service 44, and a target node 46.

It should be pointed out that the transmitting end node 42 includes a base station, and the target node 46 includes a terminal device. In addition, it should be noted that the transmitting end node 42 sends the positioning service reference signal resource to the positioning server 44. The terminal device 46 may subsequently send a positioning request to the positioning server 44 to obtain it. Of course, in other cases, for example but not limited to, when the terminal device 46 is handed over from one cell to another cell, and the positioning server may not obtain the positioning service reference signal resource of the transmitting end node 42 corresponding to another cell, the terminal device 46 It can directly interact with the transmitting end node 42 to obtain positioning service reference signal resources. When the terminal device A requests the first-level positioning service without payment, the positioning server does not tell the user the sequence pseudo-random identification of the high-level positioning reference signal resource, so the user will not be able to perform the detection, only the first-level reference signal resource, that is, the resource 0,4,8,12, its positioning accuracy and delay are only satisfied with the first-level positioning service.

If terminal device B pays to request the second-level positioning service for high-precision positioning, the positioning server sends all configuration information of the first-level positioning service reference signal resource and the second-level positioning service reference signal resource to terminal device B, including the current second-level positioning service reference The pseudo-random identification used by each symbol in the signal resource, the pseudo-random identification of each symbol in a resource is the same, the pseudo-random identification of each resource of a level is also the same, and the second-level positioning reference signal resource 2, 6, 10, 14 The pseudo-random identifiers used in each symbol within are the same. After obtaining the pseudo-random identifier, the terminal device B can detect the eight-beam downlink positioning reference signal resources, the detected signal strength may be more, the algorithm that can be used is richer, the positioning accuracy is higher, and the time delay is shorter.

If the terminal device B does not meet the current positioning service requirements for precision positioning. For example, if user B is an annual member of the positioning service, he can also obtain a three-level positioning service with higher accuracy and additional services such as route prediction. The positioning server will use the first-level positioning service reference signal resource and the second-level positioning service. The service reference signal resource and all configuration information of the three-level positioning service reference signal resource are sent to the terminal device B, including the pseudo-random identifier used by each symbol in each current high-level positioning reference signal resource (the pseudo-random identifier corresponding to the second-level reference signal resource) 1. The pseudo-random identifier corresponding to the three-level reference signal resource 12), the pseudo-random identifier of each symbol in a resource is the same, and the pseudo-random identifier of each resource at one level is also the same, that is, the second-level positioning reference signal resource 2,6, The pseudo-random identifiers used by the symbols in 10 and 14 are the same, and the pseudo-random identifiers used by the symbols in the three-level positioning reference signal resources 1, 3, 5, 7, 9, 11, and 13 are the same. After obtaining the pseudo-random identification, the number of detected signal strengths may be greater, the algorithms that can be used are richer, the positioning accuracy is higher, the delay is shorter, and the functions are more.

After a period of time, the pseudo-random identification of the advanced positioning reference signal resource changes. At this time, the terminal device B has stopped paying for the high-precision positioning service request, and the positioning server no longer tells the terminal device B of the updated pseudo-random identification. The device B cannot continue to enjoy the high-precision positioning service. If the terminal device B is still in the high-precision service request, the positioning server sends a more detailed pseudo-random identification to the terminal device B.

If there is no pseudo-random representation in the sequence generation formula of the secondary service, after receiving the low-level configuration information, user A can infer that there may be resource 1 sending between 0 and 2, due to the time domain between resources 0 and 2. The interval is limited, and there is a strict correspondence between the generation of the reference signal and the time domain position, and the terminal device A can detect the secondary positioning reference signal resource through a period of search.

Specifically, the sequences between positioning reference signal resources of the same level may be the same or different. If they are not the same, the initial value generation formula will be changed accordingly. Each reference signal resource above the first level has its own pseudo-random identification. The variety of pseudo-random identifications increases the difficulty of cracking. The value of the pseudo-random identification is

Then all possible combinations among the resources of the secondary reference signal are

In the same way, each symbol in each reference signal resource above level 1 has its own pseudo-random identifier. The number of pseudo-random identifiers further increases, making it difficult to crack.

In addition, the same applies to ordinary services.

For example, terminal device A and terminal device B are both users in cell n, terminal device A needs to be synchronized with cell n with high precision to support corresponding functions, and terminal device B does not need to perform high-precision synchronization with cell n. Then, the pseudo-random identifier can be added to the sequence generation formula of the partial synchronization reference signal, and the update of the pseudo-random identifier can be notified to the terminal device A during the high-precision synchronization service request of the terminal device A.

For another example, for users with high-frequency CSI measurement requirements, the update of the pseudo-random ID is notified to the corresponding users during the service request period.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is Better implementation. Based on this understanding, the technical solution of the present disclosure essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, The optical disc) includes several instructions to enable a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the method described in each embodiment of the present disclosure.

Example 2

In this embodiment, a device for resource allocation of reference signals is also provided, which is used to implement the above-mentioned embodiments and preferred implementations, and those that have been described will not be repeated. As used below, the term "module" can implement a combination of software and/or hardware with predetermined functions. Although the devices described in the following embodiments are preferably implemented by software, hardware or a combination of software and hardware is also possible and conceived.

Fig. 5 is a structural block diagram of a reference signal resource allocation device according to an embodiment of the present disclosure. As shown in Fig. 5, the device includes:

The classification module 52 is configured to classify the reference signal resource into a first-level reference signal resource and an N-level reference signal resource by the transmitting end node, where N is a positive integer greater than 1.

The configuration module 54 is configured to set a pseudo-randomization identifier in the resource block of the N-level reference signal resource, where the randomization identifier is used to eliminate the reference signal sequence and time in the resource block of the N-level reference signal resource. Correspondence between the positions of the domain symbols.

It should be noted that each of the above modules can be implemented by software or hardware. For the latter, it can be implemented in the following manner, but not limited to this: the above modules are all located in the same processor; or, the above modules are combined in any combination The forms are located in different processors.

Example 3

The embodiment of the present disclosure also provides a storage medium in which a computer program is stored, wherein the computer program is configured to execute the steps in any of the foregoing method embodiments when running.

In at least one exemplary embodiment, the above-mentioned storage medium may be configured to store a computer program for executing the following steps:

S1. The transmitting end node classifies the reference signal resource into a first-level reference signal resource and an N-level reference signal resource, where N is a positive integer greater than 1.

S2. The transmitting end node sets a pseudo-randomization identifier in the resource block of the N-level reference signal resource, where the randomization identifier is used to eliminate the reference signal sequence in the resource block of the N-level reference signal resource and Correspondence between symbol positions in the time domain.

In at least one exemplary embodiment, the foregoing storage medium may include, but is not limited to: U disk, Read-Only Memory (Read-Only Memory, ROM for short), Random Access Memory (Random Access Memory, RAM for short), mobile Various media that can store computer programs, such as hard disks, magnetic disks, or optical disks.

An embodiment of the present disclosure also provides an electronic device, including a memory and a processor, the memory stores a computer program, and the processor is configured to run the computer program to execute the steps in any of the foregoing method embodiments.

In at least one exemplary embodiment, the aforementioned electronic device may further include a transmission device and an input-output device, wherein the transmission device is connected to the aforementioned processor, and the input-output device is connected to the aforementioned processor.

For specific examples in this embodiment, reference may be made to the examples described in the above-mentioned embodiments and alternative implementations, and details are not described herein again in this embodiment.

Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present disclosure can be implemented by a general computing device, and they can be concentrated on a single computing device or distributed in a network composed of multiple computing devices. Above, in at least one exemplary embodiment, they can be implemented with program codes executable by a computing device, so that they can be stored in a storage device for execution by the computing device, and in some cases, they can be The steps shown or described are executed in the order here, or they are separately fabricated into individual integrated circuit modules, or multiple modules or steps of them are fabricated into a single integrated circuit module for implementation. In this way, the present disclosure is not limited to any specific hardware and software combination.

The foregoing descriptions are only preferred embodiments of the present disclosure, and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

A method for allocating reference signal resources includes:

The transmitting end node classifies the reference signal resource into a first-level reference signal resource and an N-level reference signal resource, where N is a positive integer greater than 1.

The transmitting end node sets a pseudo-randomization identifier in the resource block of the N-level reference signal resource, where the randomization identifier is used to eliminate the reference signal sequence and time domain in the resource block of the N-level reference signal resource Correspondence between symbol positions.
The method according to claim 1, wherein the transmitting end node setting a pseudo-randomization identifier in a resource block of the N-level reference signal resource comprises:

The transmitting end node adds the parameter of the pseudo-randomization identifier to the initial sequence value of the reference signal sequence of the resource block for generating the N-level reference signal resource.
The method of claim 1, wherein:

The reference signal sequence on each time domain symbol in each resource block in the N-level reference signal resource is different from the reference signal sequence on each time domain symbol in each resource block in the non-N-level reference signal resource.
The method according to claim 1, wherein when the reference signal resource is a positioning reference signal resource, the method further comprises:

The transmitting end node sends resource configuration information to the positioning server, where the resource configuration information includes:

The first-level reference signal resources and the classification information of the N-level reference signal resources;

Resource information of the N-level reference signal resource carrying the pseudo-randomized identifier; and

The change rule information corresponding to the randomized identifier.
The method according to claim 4, further comprising:

Receiving a positioning service request sent by the target node, analyzing and determining the requested positioning reference signal resource type;

Sending the resource configuration information corresponding to the requested positioning reference signal resource type to the target node.
The method according to claim 5, wherein the sending resource configuration information corresponding to the requested positioning reference signal resource type to the target node comprises:

When it is determined that the requested positioning reference signal resource type is the primary reference signal resource, the target node sends resource configuration information corresponding to the primary reference signal resource to the target node;

When it is determined that the requested positioning reference signal resource type is the N-level reference signal resource, the target node configures the resource configuration information corresponding to the N-level reference signal resource and the resource configuration corresponding to the reference signal resource below the N level The information is sent to the target node.
The method according to claims 1-6, further comprising: sending the updated pseudo-randomized identifier to the target corresponding to the corresponding N-level reference signal resource within the change period of the pseudo-randomized identifier node.
The method according to claims 1-6, wherein each of the first-level reference signal resources and the N-level reference signal resources includes at least:

The resource block identifier of the reference signal resource; the reference signal sequence identifier of the reference signal resource, the time domain density of the resource block of the reference signal resource, the frequency domain density of the resource block of the reference signal resource, the reference The bandwidth of the signal resource, and the number of time-domain symbols in the reference signal resource.
A device for allocating reference signal resources is located in a transmitting end node, and the device includes:

A classification module configured to classify the reference signal resource into a first-level reference signal resource and an N-level reference signal resource by the transmitting end node, where N is a positive integer greater than one;

The configuration module is configured to set a pseudo-randomization identifier in the resource block of the N-level reference signal resource, where the randomization identifier is used to eliminate the reference signal sequence and time domain in the resource block of the N-level reference signal resource Correspondence between symbol positions.
A storage medium, wherein a computer program is stored in the storage medium, wherein the computer program is configured to execute the method in any one of claims 1-8 when running.
An electronic device comprising a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the computer program described in any one of claims 1-8 method.