CN109548132B

CN109548132B - Reference signal transmission method and device

Info

Publication number: CN109548132B
Application number: CN201811520930.4A
Authority: CN
Inventors: 张厦
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-12-12
Filing date: 2018-12-12
Publication date: 2021-09-17
Anticipated expiration: 2038-12-12
Also published as: CN109548132A

Abstract

The embodiment of the invention discloses a reference signal transmission method and equipment, relates to the technical field of communication, and aims to solve the problem of transmission resource waste of a communication system caused by the fact that UE sends a plurality of reference signals in the form of narrow-band signals. The method is applied to user equipment, and comprises the following steps: in a first sub-period of a target transmission period, sending N reference signals to access network equipment, wherein time-frequency resources occupied by each reference signal in the N reference signals are different, and N is an integer greater than or equal to 2; and transmitting a target signal to the access network equipment in each sub-period except the first sub-period in the target transmission period, wherein the target signal comprises a first reference signal which is the same as a second reference signal in the N reference signals. The method can be applied to the scene of transmitting the reference signal.

Description

Reference signal transmission method and device

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a reference signal transmission method and device.

Background

In a communication system, a User Equipment (UE) may transmit a reference signal in the form of a wideband signal to a base station. However, since the power spectral density of the reference signal in this form is low, the channel quality of the uplink channel of the UE estimated by the base station according to the reference signal in this form may be low.

Currently, in order to improve the channel quality of the uplink channel of the UE evaluated by the base station, the UE may transmit a reference signal to the base station in the form of a narrowband signal. For example, as shown in fig. 1, the UE may transmit one reference signal in each of a plurality of periods of one transmission cycle T, respectively. In the frequency domain, the frequency bands corresponding to the reference signals may cover the entire communication bandwidth B of the communication system.

However, in the process that the UE transmits the reference signal to the base station in the form of a narrowband signal, each reference signal occupies a certain transmission resource, thereby causing a waste of transmission resources of the communication system.

Disclosure of Invention

The embodiment of the invention provides a reference signal transmission method and equipment, which aim to solve the problem of transmission resource waste of a communication system caused by the fact that UE sends a plurality of reference signals in the form of narrow-band signals.

In order to solve the above technical problem, the embodiment of the present invention is implemented as follows:

in a first aspect, an embodiment of the present invention provides a reference signal transmission method, where the method is applied to a user equipment, and the method includes: in a first sub-period of a target transmission period, sending N reference signals to access network equipment, wherein time-frequency resources occupied by each reference signal in the N reference signals are different, and N is an integer greater than or equal to 2; and transmitting a target signal to the access network equipment in each sub-period except the first sub-period in the target transmission period, wherein the target signal comprises a first reference signal which is the same as a second reference signal in the N reference signals.

In a second aspect, an embodiment of the present invention provides a reference signal transmission method, which is applied to an access network device, and the method includes: receiving N reference signals sent by UE in a first sub-period of a target transmission period, wherein time-frequency resources occupied by each reference signal in the N reference signals are different, and N is an integer greater than or equal to 2; and receiving a target signal sent by the UE in each sub-period except for the first sub-period in the target transmission period, wherein the target signal comprises a first reference signal which is the same as a second reference signal in the N reference signals.

In a third aspect, an embodiment of the present invention provides a UE, where the UE includes a sending module. The sending module is used for sending N reference signals to the access network equipment in a first sub-period of the target transmission period, wherein time-frequency resources occupied by each reference signal in the N reference signals are different, and N is an integer greater than or equal to 2; and transmitting a target signal to the access network equipment in each sub-period except the first sub-period in the target transmission period, wherein the target signal comprises a first reference signal, and the first reference signal is the same as a second reference signal in the N reference signals.

In a fourth aspect, an embodiment of the present invention provides an access network device, where the access network device includes a receiving module. A receiving module, configured to receive, in a first sub-period of a target transmission period, N reference signals sent by a UE, where time-frequency resources occupied by each reference signal in the N reference signals are different, and N is an integer greater than or equal to 2; and receiving a target signal sent by the UE in each sub-period except the first sub-period in the target transmission period, wherein the target signal comprises a first reference signal which is the same as a second reference signal in the N reference signals.

In a fifth aspect, an embodiment of the present invention provides a UE, including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the reference signal transmission method provided in the first aspect.

In a sixth aspect, an embodiment of the present invention provides an access network device, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, and when executed by the processor, the computer program implements the steps of the reference signal transmission method provided in the second aspect.

In a seventh aspect, an embodiment of the present invention provides a communication system, where the communication system includes the UE in the third aspect and the access network device in the fourth aspect. Alternatively, the communication system includes the UE in the fifth aspect and the access network device in the sixth aspect.

In an eighth aspect, the embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the reference signal transmission method in the first aspect or the second aspect.

In the embodiment of the present invention, N reference signals (each of the N reference signals occupies different time-frequency resources, where N is an integer greater than or equal to 2) may be sent to the access network device in a first sub-period of the target transmission period; and transmitting a target signal to the access network device in each sub-period except for the first sub-period in the target transmission period (the target signal comprises a first reference signal which is the same as a second reference signal in the N reference signals). Through the scheme, the UE can only send one reference signal without sending N reference signals in each sub-period (the duration of one sub-period is equal to the duration of a traditional period) except the first sub-period in the target transmission period, so that the embodiment of the invention can save the overhead of a communication system, and can solve the problem of transmission resource waste of the communication system.

Drawings

Fig. 1 is a schematic diagram of a time-frequency structure of a reference signal provided in the prior art;

fig. 2 is a schematic diagram of a communication system according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a reference signal transmission method according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a time-frequency structure of a reference signal according to an embodiment of the present invention;

fig. 5 is a second schematic diagram of a reference signal transmission method according to an embodiment of the present invention;

fig. 6 is a third schematic diagram of a reference signal transmission method according to an embodiment of the present invention;

fig. 7 is a fourth schematic diagram of a reference signal transmission method according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a detection circuit according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 10 is a second schematic structural diagram of a UE according to the embodiment of the present invention;

fig. 11 is a schematic structural diagram of an access network device according to an embodiment of the present invention;

fig. 12 is a second schematic structural diagram of an access network device according to an embodiment of the present invention;

fig. 13 is a hardware diagram of a UE according to an embodiment of the present invention;

fig. 14 is a hardware schematic diagram of an access network device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The term "and/or" herein is an association relationship describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. The symbol "/" herein denotes a relationship in which the associated object is or, for example, a/B denotes a or B.

The terms "first" and "second," and the like, in the description and in the claims of the present invention are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first received power and the second received power, etc. are used to distinguish different received powers, and are not used to describe a specific order of the received powers.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the description of the embodiments of the present invention, unless otherwise specified, "a plurality" means two or more, for example, a plurality of reference signals means two or more reference signals.

The embodiment of the invention provides a reference signal transmission method and equipment, which can send N reference signals (each reference signal in the N reference signals occupies different time-frequency resources, and N is an integer greater than or equal to 2) to access network equipment in a first sub-period of a target transmission period; and transmitting a target signal to the access network device in each sub-period except for the first sub-period in the target transmission period (the target signal comprises a first reference signal which is the same as a second reference signal in the N reference signals). Through the scheme, the UE can only send one reference signal without sending N reference signals in each sub-period (the duration of one sub-period is equal to the duration of a traditional period) except the first sub-period in the target transmission period, so that the embodiment of the invention can save the overhead of a communication system, and can solve the problem of transmission resource waste of the communication system.

The reference signal transmission method and apparatus provided in the embodiments of the present invention are described in detail below with reference to fig. 2 to fig. 14 through specific embodiments and application scenarios thereof.

Fig. 2 is a schematic diagram illustrating an architecture of a communication system according to an embodiment of the present invention. As shown in fig. 2, the communication system may include a UE 201 and an access network device 202. Wherein, a connection can be established between the UE 201 and the access network device 202.

It should be noted that fig. 2 is an exemplary illustration taking a wired network connection between the UE 201 and the access network device 202 as an example, which does not limit any embodiment of the present invention, and may be determined according to actual usage requirements.

A UE is a device that provides voice and/or data connectivity to a user, a handheld device with wired/wireless connectivity, or other processing device connected to a wireless modem. A UE may communicate with one or more core Network devices via a Radio Access Network (RAN). The UE may be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, or a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, that exchanges speech and/or data with the RAN, such as a Personal Communication Service (PCS) phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), and so on. A UE may also be referred to as a User Agent (User Agent) or a terminal device, etc.

An access network device is a device deployed in a RAN for providing wireless communication functionality for a UE. In the embodiment of the present invention, the access network device may be a base station, and the base station may include various macro base stations, micro base stations, relay stations, access points, and the like. In systems using different radio access technologies, the names of devices that function as base stations may differ. For example, in a 5G system, it may be referred to as a 5G base station (gNB); in a fourth Generation wireless communication (4-Generation, 4G) system, such as a Long Term Evolution (LTE) system, it may be referred to as an evolved NodeB (eNB); in a third generation mobile communication (3G) system, it may be referred to as a base station (Node B). As communication technology evolves, the name "base station" may change.

Based on the communication system shown in fig. 2, an embodiment of the present invention provides a measurement indication method. As shown in fig. 3, the measurement indication method may include steps 301 to 304 described below.

Step 301, in the first sub-period of the target transmission period, the UE sends N reference signals to the access network device.

The time-frequency resources occupied by each of the N reference signals may be different. N is an integer greater than or equal to 2.

Optionally, in this embodiment of the present invention, the target transmission period may be any one of K transmission periods in which the UE sends the reference signal to the access network device. Wherein K is an integer greater than or equal to 1.

It should be noted that, in the embodiment of the present invention, the target transmission period may include at least two sub-periods (i.e., a first sub-period and at least one sub-period other than the first sub-period), and a length of each sub-period in the target transmission period may be the same as a length of a conventional transmission period.

For example, fig. 4 is a schematic diagram of a time-frequency structure of a reference signal according to an embodiment of the present invention. Assume a target transmission period T_RSIs given by T_iIndicating (e.g. the first sub-period is denoted by T₁Indicating that the second sub-period is T₂Indicates), then the target transmission period T is reached_RSLength of each sub-period T in_iMay be the same as the length T of the conventional transmission period as shown in fig. 1. Wherein i is a positive integer.

Optionally, in this embodiment of the present invention, each of the N Reference signals may be a Demodulation Reference Signal (DMRS) or a Sounding Reference Signal (SRS). The embodiment of the present invention can be determined according to actual use requirements and is not limited.

Optionally, in this embodiment of the present invention, a sum of frequency domain resources occupied by the N reference signals may be a system bandwidth.

Optionally, in this embodiment of the present invention, for N reference signals in the first sub-period, a sum of time domain resources occupied by the N reference signals may be less than or equal to a duration of one sub-period.

Optionally, in the embodiment of the present invention, the N reference signals may be sent in a sequence form, that is, the UE may send a reference signal sequence of the N reference signals to the access network device. Correspondingly, the reference signal sequences of the N reference signals occupy different time-frequency resources.

Step 302, the access network device receives the N reference signals.

In this embodiment of the present invention, in a first sub-period of the target transmission period, the access network device may receive N reference signals (e.g., reference signal sequences of the N reference signals) sent by the UE. The access network device may then estimate channel qualities of channels transmitting the N reference signals based on the received powers of the N reference signals.

It should be noted that, for a specific implementation manner in which the access network device may estimate the channel quality of the channel for transmitting the N reference signals according to the received powers of the N reference signals, step 305 and step 306 in the following embodiments are described in detail, and details are not described here.

Step 303, in each sub-period other than the first sub-period in the target transmission period, the UE sends a target signal to the access network device.

The target signal may include a first reference signal. The first reference signal may be the same as a second reference signal of the N reference signals.

In an embodiment of the present invention, the second reference signal may be any one of N reference signals.

It should be noted that, the first reference signal and the second reference signal may include at least one of the following: the frequency domain resources occupied by the first reference signal are the same as the frequency domain resources occupied by the second reference signal (for example, the same bandwidth), the transmission power of the first reference signal is the same as the transmission power of the second reference signal, and the reference signal sequence of the first reference signal is the same as the reference signal sequence of the second reference signal (i.e., contains the same information).

For example, assuming that the target transmission period includes 2 sub-periods (i.e., a first sub-period and a second sub-period), the UE may transmit the target signal to the access network device in the second sub-period. The first reference signal in the target signal occupies the same frequency domain resources and the reference signal sequence as the second reference signal in the first sub-period.

For example, assuming that the target transmission period includes 3 sub-periods (i.e., a first sub-period, a second sub-period, and a third sub-period), the UE may transmit the target signal to the access network device in the second sub-period and the third sub-period, respectively. The frequency domain resources occupied by the first reference signal in the target signal and the second reference signal in the first sub-period are the same, the transmission power of the first reference signal in the target signal and the transmission power of the second reference signal in the first sub-period are the same, and the reference signal sequence of the first reference signal in the target signal and the reference signal sequence of the second reference signal in the first sub-period are the same.

Optionally, in this embodiment of the present invention, the target signal may further include N-1 compensation values (the N-1 compensation values may be referred to as compensation information). Each compensation value in the N-1 compensation values is a difference between the reflected power of the second reference signal and the reflected power of one of the other reference signals, the N-1 compensation values sent in each of the sub-periods other than the first sub-period are used by the access network device to estimate the received power of the other reference signals in the sub-period, and the other reference signals are the reference signals other than the second reference signal in the N reference signals.

For the specific implementation manner of the UE acquiring N-1 compensation values, steps 307 and 308 in the following embodiments will be described in detail, which is not repeated herein.

Step 304, the access network equipment receives the target signal.

In this embodiment of the present invention, in each sub-period other than the first sub-period in the target transmission period, the access network device may receive a target signal (for example, a reference signal sequence of the target signal) sent by the UE, and obtain a received power (i.e., a first received power) of the target signal. In this way, the access network device can evaluate the channel quality of the channel transmitting the target signal according to the first received power.

Further, if the target signal includes N-1 offset values, the access network device may estimate the received powers (i.e., N-1 second received powers) of the other N-1 reference signals within one sub-period according to the first received power and the N-1 offset values. In this way, the access network device can evaluate the channel quality of the channel for transmitting the other reference signals according to the N-1 second received powers.

For a specific implementation manner of the access network device estimating the received power of the other reference signals in one sub-period according to the target signal, steps 309 to 311 in the following embodiments are described in detail, and are not described herein.

Embodiments of the present invention provide a method for transmitting a reference signal, where in each sub-period other than a first sub-period in a target transmission period (the duration of one sub-period is equivalent to the duration of a conventional period), a UE may send only one reference signal without sending N reference signals, so that the embodiments of the present invention may save overhead of a communication system, and may solve a problem of transmission resource waste of the communication system.

Optionally, with reference to fig. 3, as shown in fig. 5, after the step 302, the method for transmitting a reference signal according to the embodiment of the present invention may further include the following steps 305 and 306.

Step 305, the access network device obtains the received power of each of the N reference signals.

Step 306, the access network device estimates the channel quality of the channel transmitting the N reference signals according to the received power of the N reference signals.

Optionally, in this embodiment of the present invention, the channel for sending the N reference signals may be an Uplink channel, for example, a Physical Uplink Shared Channel (PUSCH).

Optionally, in this embodiment of the present invention, the access network device may obtain the received power corresponding to one reference signal every time the access network device receives the one reference signal.

For example, in the first sub-period of the target transmission period, the UE may sequentially transmit a reference signal RS1, reference signals RS2, … …, and a reference signal RSN to the access network device. Correspondingly, the access network device may receive the reference signal RS1 first, and obtain the received power of the reference signal RS 1; receiving a reference signal RS2, and acquiring the receiving power of a reference signal RS 2; receiving a reference signal RS3, and acquiring the receiving power of a reference signal RS 3; … …, respectively; by analogy, the access network device may receive the reference signal RSN and obtain the received power of the reference signal RSN.

Optionally, in this embodiment of the present invention, a possible implementation manner is that the access network device may estimate, in real time, channel quality of a channel that transmits one reference signal after acquiring the received power of the reference signal; another possible implementation manner is that the access network device may uniformly estimate the channel quality of the channel transmitting the N reference signals after acquiring the received powers of the N reference signals.

Optionally, in this embodiment of the present invention, the access network device may evaluate the channel quality of a channel that transmits the reference signal by determining whether the received power of the reference signal is greater than or equal to a preset value.

For example, if the received power of the reference signal is greater than or equal to a preset value, the access network device may confirm that the channel quality of the channel transmitting the reference signal is good, and allocate a resource block with a good instantaneous channel state to the PUSCH transmission of the UE; if the received power of the reference signal is less than the preset value, the access network device may confirm that the channel quality of the channel transmitting the reference signal is poor and does not need to allocate a resource block with a good instantaneous channel state to the PUSCH transmission of the UE.

According to the reference signal transmission method provided by the embodiment of the invention, the access network equipment can allocate better resource blocks for the UE by evaluating the channel quality of the channels for sending the N reference signals, so that the service quality of the UE can be ensured.

Optionally, with reference to fig. 3, as shown in fig. 6, before the UE sends the target signal to the access network device in the second sub-period of the target transmission period, the reference signal transmission method provided in the embodiment of the present invention may further include steps 307 and 308 described below.

Step 307, the UE obtains the reflected power of each of the N reference signals to obtain N reflected powers.

Step 308, the UE calculates N-1 compensation values according to the N reflected powers.

Illustratively, assume that N-1 compensation values are respectively represented by Δ P_F1、ΔP_F2、……、ΔP_F(n-1)Indicating that the reflected power of the second reference signal is P_FmIndicating that the reflected power of other reference signals is P_F1、P_F2……、P_F(n-1)That means, then the following relationship may exist between the reflected power of the N reference signals and the N-1 compensation values:

ΔP_F1＝P_F1-P_Fm；

ΔP_F2＝P_F2-P_Fm；

……

ΔP_F(n-1)＝P_F(n-1)-P_Fm。

according to the reference signal transmission method provided by the embodiment of the invention, the UE can acquire N-1 compensation values according to the N reference signals and send the compensation values to the access network equipment, so that the access network equipment can acquire the receiving power of other reference signals according to the receiving power of the target signal and the N-1 compensation values, and the channel quality evaluation of N channels can be realized.

Optionally, with reference to fig. 3, as shown in fig. 7, for each sub-period other than the first sub-period, after step 304, the method for transmitting a reference signal according to the embodiment of the present invention may further include steps 309 to 311 described below.

Step 309, the access network device obtains the first receiving power.

The first received power may be a received power of a target signal received in one sub-period.

Step 310, the access network device estimates N-1 second received powers according to the first received power and the N-1 compensation values.

Each of the second received powers may be a received power of another reference signal in one sub-period.

It should be noted that the reflected power of a reference signal may be inversely proportional to the received power of a reference signal.

For example, assume that the received power of other reference signals in a sub-period is P_BSiIndicating that the reflected power of other reference signals is P_FiIndicating that the received power of the target signal is P_BSmIndicating the reflected power of the target signal by P_FmRepresents, and the reflected power P of the other reference signal_FiDifference P of reflected power from target signal_FmBy Δ P_FiAnd (4) showing. Since the reflected power of a reference signal is inversely proportional to the received power of a reference signal, the following formula one exists:

P_BSi-P_BSm＝P_Fm-P_Fi。

further, a formula two can be obtained according to the formula one:

P_BSi＝P_BSm-(P_Fi-P_Fm)

＝P_BSm-ΔP_Fi

wherein i is more than or equal to 1 and less than or equal to n-1, and i is a positive number.

The access network device may receive the first received power P according to the above formula_BSmAnd N-1 compensation values Δ P_F1、ΔP_F2、……、ΔP_F(n-1)Obtaining N-1 second received powers P_BS1、P_BS2、……、P_BS(n-1)。

Step 311, the access network device estimates the channel quality of the first channel according to the first receiving power, and estimates the channel quality of one second channel according to each second receiving power.

The first channel may be a channel for transmitting a target signal, and each second channel may be a channel for transmitting one reference signal of other reference signals.

Illustratively, the access network device may be based on the second received power P_BS1Estimating a channel quality of a second channel; according to N-1 second received powers P_BSiThe channel quality of the respective N-1 second channels is estimated.

Compared with the prior art in which the UE sends N reference signals to the access network device, so that the access network device evaluates the signal quality according to the N reference signals, the reference signal transmission method provided in the embodiments of the present invention can only send one target signal (the target signal includes one reference signal and N-1 compensation values) without sending the N reference signals, so that the access network device in the embodiments of the present invention can obtain the receiving power of other reference signals according to the receiving power of the target signal and the N-1 compensation values, thereby implementing channel quality evaluation on N channels, and further saving system overhead.

For a clearer understanding of the embodiments of the present invention, the following description will exemplarily describe "the reflected power of a reference signal is inversely proportional to the received power of a reference signal" in conjunction with the detection circuit shown in fig. 8.

As shown in fig. 8, the detection circuitry may include a UE and an access network device 85. The UE may include a processor 81, a modem module 82 connected to the processor 81, a radio frequency transceiver 83 connected to the modem module 82, and a radio frequency front end device 84 connected to the radio frequency transceiver 83.

The processor 81 may be configured to control the relevant devices such as the modem module 82 and process the reference signal.

The modem module 82 may include a radio frequency signal modem circuit 82b and a reflected signal demodulator circuit 82 a. The rf signal modulation/demodulation circuit 82b may be specifically configured to modulate an rf signal, and send the modulated rf signal to the rf front-end device 84 through the rf transceiver 83; the reflected signal demodulation circuit 82a may be specifically configured to receive the reflected signal sent by the rf front-end device 84 through the rf transceiver 83, demodulate the reflected signal, and send the demodulated reflected signal to the processor 81.

The radio frequency front end device 84 may include an amplifier 84a, a duplexer 84b connected to the amplifier 84a, a switch 84c connected to the duplexer 84b, and a bi-directional coupler 84d connected to the switch 84 c. The reference signal is transmitted to the access network device 85 through the antenna of the UE after passing through the amplifier 84a, the duplexer 84b, the switch 84c, and the bidirectional coupler 84 d.

Suppose that the power of the reference signal input to the input of the bi-directional coupler 84d is P₀The forward insertion loss value of the bidirectional coupler 84d is IL_CThe forward and reverse coupling coefficient of the bidirectional coupler 84d is constant C, and the antenna transmission power is P_fuAntenna loss of P_ANTThe reflected power of the reference signal detected by the RF transceiver is P_FThe power of the reference signal received by the access network equipment is P_BSAnd a spatial loss of L_AIR，

Then the relationship between the antenna incident power, the antenna radiation power, the reflected power and the antenna loss power at the antenna port plane can be expressed by the following formula three:

P₀-IL_C＝P_fu+(P_F+C)+P_ANT。

the power of the reference signal received by the access network equipment end can be represented by the following formula four:

P_BS＝P_fu-L_AIR。

combining the formula three and the formula four to obtain

P_BS＝P₀-IL_C-P_F-C-P_ANT-L_AIR。

Due to P₀、IL_C、C、P_ANTRelative to the mobile terminal, the values are fixed values, and if the spatial losses of different frequency bands are ignored within a certain time, P is_BSAnd P_FInversely proportional, i.e. the reflected power of a reference signal is inversely proportional to the received power of a reference signal. Therefore, the access network equipment can obtain the receiving power of each sending of the multiple reference signals according to the reflection power difference of the reference signals of different frequency bands in the communication bandwidth, and therefore the quality of uplink channels of different frequency bands can be evaluated.

As shown in fig. 9, an embodiment of the present invention provides a UE 900. The UE may include a transmitting module 901. The sending module 901 is configured to send N reference signals to the access network device in a first sub-period of a target transmission period, where time-frequency resources occupied by each reference signal in the N reference signals are different, and N is an integer greater than or equal to 2; and transmitting a target signal to the access network equipment in each sub-period except the first sub-period in the target transmission period, wherein the target signal comprises a first reference signal, and the first reference signal is the same as a second reference signal in the N reference signals.

Optionally, in the embodiment of the present invention, the target signal may further include N-1 compensation values. Each compensation value is a difference value between the reflected power of the second reference signal and the reflected power of one of the other reference signals, N-1 compensation values sent in each sub-period except the first sub-period are used for the access network equipment to estimate the received power of the other reference signals in the sub-period, and the other reference signals are the reference signals except the second reference signal in the N reference signals.

Optionally, with reference to fig. 9, as shown in fig. 10, the UE provided in the embodiment of the present invention may further include an obtaining module 902 and a calculating module 903. An obtaining module 902, configured to obtain, before the sending module 901 sends the target signal to the access network device in the second sub-period of the target transmission period, the reflected power of each of the N reference signals to obtain N reflected powers; a calculating module 903, configured to calculate N-1 compensation values according to the N reflected powers acquired by the acquiring module 902.

Optionally, in this embodiment of the present invention, each of the reference signals may be a demodulation reference signal or a sounding reference signal.

The UE provided in the embodiment of the present invention can implement each process implemented by the UE in the foregoing method embodiments, and is not described here again to avoid repetition.

The embodiment of the invention provides the UE, and the UE can only send one reference signal without sending N reference signals in each sub-period (the duration of one sub-period is equal to the duration of a traditional period) except for the first sub-period in the target transmission period, so the UE provided by the embodiment of the invention can save the overhead of a communication system, and the problem of waste of transmission resources of the communication system can be solved.

As shown in fig. 11, an embodiment of the present invention provides an access network device 1100. The access network device 1100 may include a receiving module 1101. The receiving module 1101 is configured to receive, in a first sub-period in a target transmission period, N reference signals sent by a UE, where time-frequency resources occupied by each reference signal in the N reference signals are different, and N is an integer greater than or equal to 2; and receiving a target signal sent by the UE in each sub-period except the first sub-period in the target transmission period, wherein the target signal comprises a first reference signal which is the same as a second reference signal in the N reference signals.

Optionally, in the embodiment of the present invention, the target signal may include N-1 compensation values. Each compensation value is the difference between the reflected power of the second reference signal and the reflected power of one of the other reference signals, N-1 compensation values in the target signal transmitted in each sub-period are used for estimating the received power of the other reference signals in one sub-period, and the other reference signals are the reference signals except the second reference signal in the N reference signals.

Optionally, with reference to fig. 11, as shown in fig. 12, the access network device provided in the embodiment of the present invention may further include an obtaining module 1102 and a calculating module 1103. The obtaining module 1102 is configured to obtain a first received power, where the first received power is a received power of a target signal received in one sub-period. A calculating module 1103, configured to estimate N-1 second received powers according to the first received power and the N-1 compensation values obtained by the obtaining module 1102, where each second received power is a received power of another reference signal in the sub-period; and estimating the channel quality of a first channel according to the first receiving power, and estimating the channel quality of a second channel according to each second receiving power, wherein the first channel is a channel for transmitting the target signal, and each second channel is a channel for transmitting one reference signal in the other reference signals.

The access network device provided by the embodiment of the present invention can implement each process implemented by the access network device in the above method embodiments, and is not described here again to avoid repetition.

The embodiment of the invention provides access network equipment, and because in each sub-period except for the first sub-period in a target transmission period (the duration of one sub-period is equivalent to the duration of a traditional period), UE can only send one reference signal without sending N reference signals, the access network equipment provided by the embodiment of the invention only receives one reference signal, thereby saving the overhead of a communication system and further solving the problem of transmission resource waste of the communication system.

Fig. 13 is a schematic hardware structure diagram of a UE implementing various embodiments of the present invention. As shown in fig. 13, the UE 100 includes, but is not limited to: radio frequency unit 101, network module 102, audio output unit 103, input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the UE structure shown in fig. 13 does not constitute a limitation of the UE, which may include more or fewer components than those shown, or combine certain components, or a different arrangement of components. In the embodiment of the present invention, the UE includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a wearable device, a pedometer, and the like.

The radio frequency unit 101 is configured to send N reference signals to the access network device in a first sub-period of a target transmission period, where time-frequency resources occupied by each reference signal in the N reference signals are different, and N is an integer greater than or equal to 2; and transmitting a target signal to the access network device in each sub-period other than the first sub-period in the target transmission period, where the target signal may include a first reference signal, and the first reference signal is the same as a second reference signal in the N reference signals.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 101 may be used for receiving and sending signals during a message transmission or call process, and specifically, after receiving downlink data from a base station, the downlink data is processed by the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through a wireless communication system.

The UE 100 provides the user with wireless broadband internet access via the network module 102, such as helping the user send and receive e-mails, browse web pages, and access streaming media.

The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the network module 102 or stored in the memory 109 into an audio signal and output as sound. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the UE 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 includes a speaker, a buzzer, a receiver, and the like.

The input unit 104 is used to receive an audio or video signal. The input unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, and the graphics processor 1041 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the network module 102. The microphone 1042 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode.

The UE 100 also includes at least one sensor 105, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or backlight when the UE 100 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of the mobile terminal (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), and vibration identification related functions (such as pedometer, tapping); the sensors 105 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 106 is used to display information input by a user or information provided to the user. The display unit 106 may include a display panel 1061, and the display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the UE 100. Specifically, the user input unit 107 includes a touch panel 1071 and other input devices 1072. Touch panel 1071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 1071 (e.g., operations by a user on or near touch panel 1071 using a finger, stylus, or any suitable object or attachment). The touch panel 1071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 110, and receives and executes commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. Specifically, other input devices 1072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

Further, the touch panel 1071 may be overlaid on the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although in fig. 13, the touch panel 1071 and the display panel 1061 are two independent components to implement the input and output functions of the UE, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the UE, and is not limited herein.

The interface unit 108 is an interface for connecting an external device to the UE 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the UE 100 or may be used to transmit data between the UE 100 and external devices.

The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 110 is a control center of the UE, connects various parts of the entire UE using various interfaces and lines, performs various functions of the UE and processes data by running or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the UE. Processor 110 may include one or more processing units; alternatively, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The UE 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and optionally, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to implement functions of managing charging, discharging, and power consumption via the power management system. In addition, the UE 100 includes some functional modules that are not shown, and are not described in detail herein.

Fig. 14 is a schematic diagram of a hardware structure of an access network device according to an embodiment of the present invention. The access network device includes: a processor 1401, a transceiver 1402, a memory 1403, a user interface 1404, and a bus interface 1405.

The transceiver 1402 is configured to receive, in a first sub-period of a target transmission period, N reference signals sent by a UE, where time-frequency resources occupied by each reference signal in the N reference signals are different, and N is an integer greater than or equal to 2; and receiving a target signal sent by the UE in each sub-period except the first sub-period in the target transmission period, wherein the target signal comprises a first reference signal which is the same as a second reference signal in the N reference signals.

In embodiments of the present invention, in FIG. 14, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 1401, and various circuits, represented by memory 1403, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further in connection with embodiments of the present invention. Bus interface 1405 provides an interface. The transceiver 1402 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different UEs, the user interface 1404 may also be an interface capable of interfacing externally to the desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

Optionally, an embodiment of the present invention further provides a UE, which includes the processor 110 shown in fig. 13, a memory 109, and a computer program stored in the memory 109 and capable of being executed on the processor 110, where the computer program, when executed by the processor 110, implements the processes of the foregoing method embodiment, and can achieve the same technical effect, and details are not described here to avoid repetition.

Optionally, an embodiment of the present invention further provides an access network device, including a processor 1401 as shown in fig. 14, a memory 1403, and a computer program stored in the memory 1403 and capable of running on the processor 1401, where the computer program, when executed by the processor 1401, implements the processes of the foregoing method embodiments, and can achieve the same technical effect, and details are not described here to avoid repetition.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor 110 shown in fig. 13 or the processor 1401 shown in fig. 14, the computer program implements each process of the foregoing method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method described in the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A reference signal transmission method is applied to user equipment, and is characterized by comprising the following steps:

in a first sub-period of a target transmission period, sending N reference signals to access network equipment, wherein time-frequency resources occupied by each reference signal in the N reference signals are different, and N is an integer greater than or equal to 2;

and transmitting a target signal to the access network device in each sub-period except the first sub-period in the target transmission period, wherein the target signal comprises a first reference signal, and the first reference signal is the same as a second reference signal in the N reference signals.

2. The method of claim 1, wherein the target signal further comprises N-1 compensation values;

each compensation value is a difference between the reflected power of the second reference signal and the reflected power of one of the other reference signals, N-1 compensation values sent in each sub-period except the first sub-period are used for the access network device to estimate the received power of the other reference signals in the sub-period, and the other reference signals are the reference signals except the second reference signal in the N reference signals.

3. The method of claim 2, further comprising:

in a second sub-period of the target transmission period, before the target signal is sent to the access network device, obtaining reflected power of each reference signal in the N reference signals to obtain N reflected powers;

and calculating the N-1 compensation values according to the N reflected powers.

4. The method according to any one of claims 1 to 3, wherein each of the reference signals is a demodulation reference signal or a sounding reference signal.

5. A transmission method of reference signals is applied to access network equipment, and is characterized in that the method comprises the following steps:

receiving N reference signals sent by User Equipment (UE) in a first sub-period of a target transmission period, wherein time-frequency resources occupied by each reference signal in the N reference signals are different, and N is an integer greater than or equal to 2;

receiving a target signal sent by the UE in each sub-period except the first sub-period in the target transmission period, wherein the target signal comprises a first reference signal, and the first reference signal is the same as a second reference signal in the N reference signals.

6. The method of claim 5, wherein the target signal further comprises N-1 compensation values;

each compensation value is a difference between the reflected power of the second reference signal and the reflected power of one of the other reference signals, N-1 compensation values in the target signal transmitted in each sub-period are used for estimating the received power of the other reference signals in one sub-period, and the other reference signals are reference signals other than the second reference signal in the N reference signals.

7. The method of claim 6, further comprising:

in each sub-period except the first sub-period, executing the following steps:

acquiring first receiving power, wherein the first receiving power is the receiving power of the target signal received by one sub-period;

estimating N-1 second received powers according to the first received power and the N-1 compensation values, wherein each second received power is the received power of the other reference signals in the sub-period;

and estimating the channel quality of a first channel according to the first receiving power, and estimating the channel quality of a second channel according to each second receiving power, wherein the first channel is a channel for sending the target signal, and each second channel is a channel for sending one reference signal in the other reference signals.

8. The method according to any one of claims 5 to 7, wherein each of the reference signals is a demodulation reference signal or a sounding reference signal.

9. A User Equipment (UE), characterized in that, the UE comprises a sending module;

the sending module is configured to send N reference signals to the access network device in a first sub-period of a target transmission period, where time-frequency resources occupied by each reference signal in the N reference signals are different, and N is an integer greater than or equal to 2; and transmitting a target signal to the access network device in each sub-period except the first sub-period in the target transmission period, wherein the target signal comprises a first reference signal, and the first reference signal is the same as a second reference signal in the N reference signals.

10. The UE of claim 9, wherein the target signal further comprises N-1 compensation values;

11. The UE of claim 10, further comprising an acquisition module and a computation module;

the obtaining module is configured to obtain, before the sending module sends the target signal to the access network device in a second sub-period of the target transmission period, reflected power of each of the N reference signals to obtain N reflected powers;

the calculating module is configured to calculate the N-1 compensation values according to the N reflected powers acquired by the acquiring module.

12. The UE of any one of claims 9 to 11, wherein each of the reference signals is a demodulation reference signal or a sounding reference signal.

13. An access network device, characterized in that the access network device comprises a receiving module;

the receiving module is configured to receive, in a first sub-period of a target transmission period, N reference signals sent by a user equipment UE, where time-frequency resources occupied by each reference signal in the N reference signals are different, and N is an integer greater than or equal to 2; and receiving a target signal sent by the UE in each sub-period except the first sub-period in the target transmission period, wherein the target signal comprises a first reference signal, and the first reference signal is the same as a second reference signal in the N reference signals.

14. The access network device of claim 13, wherein the target signal further comprises N-1 offset values;

15. The access network device of claim 14, wherein the access network device further comprises an acquisition module and a computation module;

the acquiring module is configured to acquire a first received power, where the first received power is a received power of the target signal received in one sub-period;

the calculating module is configured to estimate N-1 second received powers according to the first received power and the N-1 compensation values obtained by the obtaining module, where each second received power is a received power of the other reference signals in the sub-period; and estimating the channel quality of a first channel according to the first receiving power, and estimating the channel quality of a second channel according to each second receiving power, wherein the first channel is a channel for transmitting the target signal, and each second channel is a channel for transmitting one reference signal in the other reference signals.

16. The access network device of any of claims 13-15, wherein each reference signal is a demodulation reference signal or a sounding reference signal.

17. A user Equipment, UE, comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the reference signal transmission method according to any of claims 1 to 4.

18. An access network device, characterized in that it comprises a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the reference signal transmission method according to any one of claims 5 to 8.

19. A communication system, characterized in that the communication system comprises a user equipment, UE, according to any of claims 9 to 12, and an access network device according to any of claims 13 to 16; alternatively, the first and second electrodes may be,

the communication system comprises the UE of claim 17 and the access network device of claim 18.

20. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps of the reference signal transmission method according to one of the claims 1 to 4 or the steps of the reference signal transmission method according to one of the claims 5 to 8.