WO2017132806A1

WO2017132806A1 - Method for configuring pilot signal, and first device

Info

Publication number: WO2017132806A1
Application number: PCT/CN2016/073092
Authority: WO
Inventors: 严平
Original assignee: 华为技术有限公司
Priority date: 2016-02-01
Filing date: 2016-02-01
Publication date: 2017-08-10

Abstract

Provided is a method for configuring a pilot signal, comprising: a first device determining channel state information about a current communication channel communicating with a second device; the first device determining a target pilot pattern from at least two candidate pilot patterns according to the state information about the current communication channel, wherein the pilot pattern is used for characterizing a time-domain resource distribution of pilot signals; and the first device sending identification information about the target pilot pattern to the second device, wherein the identification information about the target pilot pattern is used to instruct the second device to communicate with the first device by using the target pilot distribution pattern. In the embodiments of the present invention, by determining channel state information about a current communication channel, an optimal target pilot pattern can be selected from a plurality of candidate pilot patterns, and a current pilot signal can be dynamically configured. The method is flexibly suitable for a plurality of types of communication channel states, and improves the utilization rate of resources.

Description

Method for configuring pilot signal and first device

Technical field

The embodiments of the present invention relate to the field of communications, and in particular, to a method for configuring a pilot signal and a first device.

Background technique

Orthogonal Frequency Division Multiplexing (OFDM) technology uses a series of orthogonal subcarriers to modulate high-speed serially transmitted signals in parallel, which can efficiently utilize the spectrum resources of the system while effectively Against the frequency selective fading caused by wireless channels, OFDM modulation has become one of the most popular technologies in the future design of broadband wireless communication systems. At present, OFDM technology has been widely used in various multimedia digital transmission and mobile communication systems, such as digital broadcast television, wireless local area network access IEEE802.11a, wireless metropolitan area network IEEE802.16a/d/e, and fourth generation mobile communication. .

The wireless channel environment, as the medium of communication for wireless communication systems, is the theoretical basis for all wireless communication systems, and is also a key to the ability of real engineering systems to work with high quality and reliability. Signals propagate in a wireless channel environment, and the fading experienced is much more complicated than wired communication. In mobile communication systems, the channel environment is more severe than fixed wireless communication systems. Therefore, to study wireless channels, it is necessary to target electromagnetic waves in different propagation environments. Measurement, analysis, and modeling with geographic features. Multipath propagation is one of the most important features of wireless channels. It appears as a frequency selective fading of the signal in the frequency domain; the relative movement between transceivers causes the channel to have a Doppler shift, which appears as a signal in time. Time-selective fading; it is the ubiquitous time and frequency dual selective fading characteristics of wireless channels, which poses a huge challenge to the high-quality design of receivers.

For the above reasons, channel estimation and channel equalization are indispensable for all wireless communication systems. Currently, Pilot-Aid based channel estimation is the most commonly used method in OFDM systems. The pilot signal with strong anti-interference ability is modulated onto the pre-set subcarrier, and transmitted together with the data, and the receiving end extracts the pilot signal to capture the information of the channel at these positions, and obtains the channel on the entire spectrum by interpolation. response.

The distribution pattern of the pilot signal is related to the reliability of the OFDM channel estimation result and the overall efficiency of the system. The pilot has a block, comb, slash, diamond, random, etc. distribution pattern in the OFDM symbol, and the channel estimation algorithm and the interpolation method which are usually required by different distribution methods are also different; The pilot needs to occupy a certain bandwidth overhead, so the number of pilots that can be inserted in an OFDM system is limited.

When the channel scene changes, the original pilot distribution mode and the number of pilots may not be applicable to the changed channel, or the number is too small, resulting in system performance degradation, or the number is too large, resulting in unnecessary overhead of the system. There are many 5G communication scenarios, including high-speed mobile channels, such as high-speed rail, airplanes, etc., including static channels, such as small station backhaul, some Internet of Things (English: Internet of Things, shorthand: IOT), line of sight transmission (English: Line of Sight, abbreviated: LOS) Channel, Not Line of Sight (NLOS) channel. In various channel scenarios, the characteristics of frequency selective fading and time selective fading of the channel are different. Therefore, in these numerous channel scenarios, how to flexibly configure the corresponding pilot signals according to the actual channel characteristics is urgently needed to be solved. problem.

Summary of the invention

The embodiment of the invention provides a method for configuring a pilot signal, which can flexibly configure a corresponding pilot signal according to actual channel characteristics.

In a first aspect, a method for configuring a pilot signal is provided, the method comprising: determining, by a first device, channel state information of a current communication channel that communicates with a second device; the first device according to the current communication channel Status information, from the at least two candidate pilot patterns, determining a target pilot pattern, the pilot pattern is used to represent a time-frequency resource distribution of the pilot signal; the first device sending the device to the second device The identifier information of the target pilot pattern is used to indicate that the second device uses the target pilot distribution pattern to communicate with the first device.

Therefore, the embodiment of the present invention can determine the optimal target pilot pattern from the plurality of candidate pilot patterns by dynamically determining the channel state information of the current communication channel, and dynamically configure the current pilot signal, thereby being more flexible and adaptable. Communication channel status improves resource utilization.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the method further includes: the first device acquiring the at least two candidate pilot patterns, and obtaining the at least two candidate pilots The identification of each candidate pilot pattern in the pattern.

With reference to the first aspect and the foregoing implementation manner, in a second possible implementation manner of the first aspect, the first device determines channel state information of a current communication channel that communicates with the second device, including: Receiving, by a device, a current pilot signal sent by the second device by using a current pilot pattern; the first device determining, by using the current pilot signal, a channel state signal of the current communication channel Information, wherein the channel state information includes a delay spread of the current communication channel and a Doppler shift spread.

With reference to the first aspect and the foregoing implementation manner, in a third possible implementation manner of the first aspect, the first device determines the target guide from the at least two candidate pilot patterns according to the state information of the current communication channel. a frequency pattern, including: the first device determines, according to a delay spread, a Doppler shift spread, and a pilot pattern, from the at least two candidate pilot patterns, determining the current delay spread and The target pilot pattern corresponding to the current Doppler frequency domain extension.

With reference to the first aspect and the foregoing implementation manner, in a fourth possible implementation manner of the first aspect, the first device is a network device, and the second device is a terminal device, where the first device receives the first Before the second device uses the current pilot signal to send the current pilot signal, the method further includes: the first device sends downlink scheduling signaling to the second device, where the downlink scheduling signaling carries the The identifier information of the current pilot pattern; or the first device sends the high layer signaling to the second device, so that the second device uses the current pilot pattern to send the current pilot signal, where the high layer signal The identifier carries the identification information of the current pilot pattern.

With reference to the first aspect and the foregoing implementation manner, in a fifth possible implementation manner of the first aspect, the first device is a terminal device, the second device is a network device, and the first device receives the first Before the second device uses the current pilot signal sent by the current pilot pattern, the method further includes: the first device receiving the downlink scheduling signaling sent by the second device, where the downlink scheduling signaling carries the The identifier information of the current pilot pattern is used; or the first device receives the high layer signaling sent by the second device, where the high layer signaling carries the identifier information of the current pilot pattern.

A second aspect provides a method for configuring a pilot signal, where: the first device determines N spectral efficiencies corresponding to when the N candidate candidate pilot patterns are respectively used to communicate with the second device, where N is a positive integer; The first device selects, as the target pilot pattern, a candidate pilot pattern corresponding to the largest spectral efficiency among the N spectral efficiencies from the candidate pilot patterns in the N.

Therefore, the embodiment of the present invention can determine the optimal target pilot pattern from the plurality of candidate pilot patterns by dynamically determining the spectrum efficiency obtained under the configuration of the plurality of candidate pilot patterns of the current communication channel, and dynamically configure the current pilot signal. Therefore, it is more flexible to adapt to various communication channel states and improve resource utilization.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the first device is a network device, the second device is a terminal device, and the first device determines that the N candidate is utilized And the Nth spectral efficiency of the first candidate device is configured to be the current pilot pattern, where the first device configures the ith candidate pilot pattern of the N candidate pilot patterns to be the current pilot pattern, where 1 ≤ i ≤ N; the first device sends downlink scheduling signaling to the second device, and sends a current downlink pilot signal by using the ith pilot pattern, where the downlink scheduling signaling is used. Carrying the identifier information of the ith pilot pattern; or the first device sends the high layer signaling to the second device, and sends the current downlink pilot signal by using the ith pilot pattern, where The high-level signaling carries the identification information of the ith pilot pattern.

With reference to the second aspect and the foregoing implementation manner, in a second possible implementation manner of the second aspect, the first device is a terminal device, the second device is a network device, and the first device determines to utilize N The N spectral efficiencies corresponding to the candidate pilot patterns respectively communicating with the second device, the first device configuring the ith candidate pilot pattern of the N candidate pilot patterns as the current pilot pattern The first device sends the uplink scheduling signaling to the second device, so that the second device sends the current uplink pilot signal by using the ith pilot pattern, where And the uplink scheduling signaling carries the identifier information of the ith pilot pattern; or the network device sends high layer signaling to the terminal device, so that the terminal device uses the ith pilot pattern The current uplink pilot signal is sent, where the high-level signaling carries the identifier information of the ith pilot pattern.

With reference to the second aspect and the foregoing implementation manner, in a second possible implementation manner of the second aspect, the first device determines, when the N types of candidate pilot patterns are used to communicate with the second device, respectively. The spectrum efficiency includes: the first device scheduling, by the second device, data transmission by using the ith pilot pattern; and the first device determining spectrum efficiency of data transmission by using the ith pilot pattern .

A third aspect provides a first device for performing the method of any of the above first aspect or any of the possible implementations of the first aspect. In particular, the first device comprises means for performing the method of any of the above-described first aspect or any of the possible implementations of the first aspect.

A fourth aspect provides a first device for performing the method of any of the above-described second aspect or any of the possible implementations of the second aspect. In particular, the first device comprises means for performing the method of any of the above-described second or second aspects of the second aspect.

In a fifth aspect, a computer program product is provided, the computer program product comprising computer program code, when the computer program code is executed by a first device, causing the first device to perform the first aspect or the first aspect described above Any of the possible implementations of the described methods.

In a sixth aspect, a computer readable storage medium is provided, the computer readable storage medium storing a program that causes a predictive device of photovoltaic power generation to perform any of the first aspect or the first aspect of the first aspect The method described in the manner.

DRAWINGS

1 is a schematic diagram of a communication system to which an embodiment of the present invention is applied.

FIG. 2 is a schematic flowchart of a method for configuring a pilot signal according to an embodiment of the present invention.

3 is a schematic diagram of a pilot pattern in an LTE protocol.

FIG. 4 is a schematic diagram of pilot patterns in four typical scenarios.

FIG. 5 is a schematic flowchart of a method for configuring a pilot signal according to another embodiment of the present invention.

FIG. 6 is a schematic flowchart of a method for configuring a pilot signal according to an embodiment of the present invention.

FIG. 7 is a schematic flowchart of a method for configuring a pilot signal according to another embodiment of the present invention.

FIG. 8 is a schematic flowchart of a method for configuring a pilot signal according to another embodiment of the present invention.

FIG. 9 is a schematic flowchart of a method for configuring a pilot signal according to another embodiment of the present invention.

FIG. 10 shows a first device for configuring a pilot signal according to an embodiment of the present invention.

FIG. 11 shows a first device for configuring a pilot signal according to an embodiment of the present invention.

FIG. 12 is a schematic block diagram of a system for configuring a pilot signal according to another embodiment of the present invention.

FIG. 13 is a schematic block diagram of a system for configuring a pilot signal according to another embodiment of the present invention.

FIG. 14 is a schematic block diagram of a system for configuring a pilot signal according to another embodiment of the present invention.

FIG. 15 is a schematic block diagram of a system for configuring a pilot signal according to another embodiment of the present invention.

Figure 16 is a schematic block diagram of a first device in accordance with another embodiment of the present invention.

Figure 17 is a schematic block diagram of a first device in accordance with another embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

It should be understood that in the current cellular communication system, for example, Global System for Mobile Communication ("GSM") system, Wideband Code Division Multiple Access (WCDMA) system In a communication system such as a Long Term Evolution (LTE) system, the supported communications are mainly voice communication and data communication. In general, a traditional base station supports a limited number of connections and is easy to implement.

There are many 5G communication scenarios, including high-speed mobile channels, such as high-speed rail, airplanes, etc., including static channels, such as small station backhaul, some Internet of Things (English: Internet of Things, shorthand: IOT), line of sight transmission (English: Line of Sight, abbreviated: LOS) Channel, Not Line of Sight (NLOS) channel. The characteristics of frequency selective fading and time selective fading of the channel are different in various channel scenarios.

1 is a schematic diagram of a communication system to which an embodiment of the present invention is applied. As shown in FIG. 1, the network 100 includes a network device 102 and

terminal devices

104, 106, 108, 110, 112, and 114 (referred to as UEs in the figure), wherein the network device and the terminal device are connected through a wireless connection or a wired connection or Other ways to connect. It should be understood that FIG. 1 only illustrates a network including a network device as an example, but the embodiment of the present invention is not limited thereto. For example, the network may further include more network devices; similarly, the network may also include more terminals. The device, and the network device may also include other devices.

The network of the embodiment of the present invention may refer to a Public Land Mobile Network (PLMN) or a Device to Device (D2D) network or an M2M network or other network. For example, a simplified schematic diagram may be used, and other network devices may be included in the network, which are not shown in FIG.

The terminal device in the embodiment of the present invention may also be referred to as a user equipment (User Equipment, referred to as "UE"), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, and a user. Terminal, terminal, wireless communication device, user agent or user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol ("SSIP") phone, a Wireless Local Loop (WLL) station, and a personal digital processing (Personal Digital) Assistant, referred to as "PDA"), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network, or a future evolved PLMN network. Terminal equipment, etc.

The network device in the embodiment of the present invention may be a device for communicating with a terminal device, where the network The device may be a base station (Base Transceiver Station, abbreviated as "BTS") in GSM or Code Division Multiple Access ("CDMA"), or may be a Wideband Code Division Multiple Access (Wideband Code Division Multiple Access). The base station (NodeB, abbreviated as "NB") in the system of the "WCDMA" system, and may also be an evolved base station (Evolutional Node B) in the Long Term Evolution (LTE) system. The "eNB" or "eNodeB" may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the network device may be a relay station, an access point, or an in-vehicle device. , wearable devices, and network devices in future 5G networks or network devices in future evolved PLMN networks.

The application scenario of the embodiment of the present invention is described above with reference to FIG. 1. Hereinafter, a method for transmitting a pilot sequence according to an embodiment of the present invention will be described with reference to FIG. 2 to FIG.

FIG. 2 is a schematic flowchart of a method for configuring a pilot signal according to an embodiment of the present invention. As shown in FIG. 2, the method 200 includes:

Step 210: The first device determines channel state information of a current communication channel that communicates with the second device.

Step 220: The first device determines, according to the status information of the current communication channel, a target pilot pattern from the at least two candidate pilot patterns, where the pilot pattern is used to represent a time-frequency resource distribution of the pilot signal.

Step 230: The first device sends the identifier information of the target pilot pattern to the second device, where the identifier information of the target pilot pattern is used to indicate that the second device uses the target pilot distribution pattern to communicate with the first device.

It should be understood that if the first device is a network device, then the second device is a terminal device; otherwise, if the first device is a terminal device, then the second device is a network device. It should also be understood that the status information of the current communication channel includes related information capable of characterizing the channel state in the current communication scenario, such as delay spread of the current channel, Doppler spread, etc., and the present invention is not limited thereto.

It should be understood that the pilot pattern is used to represent the time-frequency resource distribution of the pilot signal. For example, in the LTE system, the pilot pattern specifically refers to the time-frequency resource distribution of the pilot signal in each subframe, in LTE. The time domain resource of the subframe includes 14 orthogonal frequency division multiplexing (OFDM) symbols, and the frequency domain resource includes 12 subcarriers, wherein each subcarrier bandwidth is 15 kHz. As shown in FIG. 3, a schematic diagram of a pilot pattern in an LTE protocol is shown.

At present, due to the fixed pilot pattern, that is, the time domain resource distribution of the pilot signal is fixed, there are several disadvantages: the fixed pilot pattern cannot adapt to multiple channel scenarios, for example, in some scenarios. The pilot sampling density is low, and the interpolation precision is low, that is, the pilot interval is larger than the coherent bandwidth; in some scenarios, the pilot sampling density is too high, and resources are wasted. Specifically, for example, a high frequency point and a micro cell scene of the 5G, the cell radius is small, the delay spread is small, and the frequency domain coherent bandwidth is large, and the frequency domain sampling density of the DMRS does not need to be too high, otherwise the spectrum resource is wasted.

Therefore, in the embodiment of the present invention, multiple candidate pilot patterns may be preset, and an optimal candidate pilot pattern is selected as the target pilot pattern for communication according to different communication scenarios.

Specifically, the preset pilot pattern needs to satisfy the "optimal pilot pattern design principle":

On the one hand, the inserted pilots require as few as possible to reduce transmission overhead and increase time and frequency band utilization;

On the other hand, in order to estimate the accuracy, it is necessary to consider the requirements of the sampling theorem.

For example, for an OFDM time-frequency two-dimensional channel response surface, the two-dimensional sampling theorem must be satisfied if no distortion is recovered.

It is assumed that the interval of the pilot symbols in the time domain is N _t and the interval in the frequency domain is N _f . According to the sampling theorem:

Where N _t and N _f are the sampling intervals of the pilot in the time and frequency dimensions, f _Dmax is the maximum Doppler shift, τ _max is the maximum delay spread, T _symbol is the length of one OFDM symbol, and Δf is Subcarrier spacing. This ensures that the time intervals of the pilots in time and frequency do not exceed the channel coherence time and the coherence bandwidth, respectively.

Specifically, the method of selecting the optimal pilot pattern is as follows. First, the delay spread τ _max and the Doppler spread f _{Dmax are} measured. Secondly, an appropriate pilot pattern is dynamically selected for different channel scenarios.

For example, examples of four typical channel scenarios are: (1) stationary, LOS; (2) stationary, NLOS; (3) mobile, LOS; (4) mobile, NLOS. As shown in FIG. 4, FIG. 4 is a schematic diagram of pilot patterns in four typical scenarios, including (a), (b), (c), and (d) four pilot patterns, wherein FIG. 4(a) corresponds to a scene. (1), FIG. 4(b) corresponds to the scene (2), FIG. 4(c) corresponds to the scene (3), and FIG. 4(d) corresponds to the scene (4).

Therefore, the embodiment of the present invention can determine the channel state information of the current communication channel. Among the candidate pilot patterns, the optimal target pilot pattern is selected, and the current pilot signal is dynamically configured, so that it can be more flexibly adapted to various communication channel states and improve resource utilization.

Optionally, as an embodiment of the present invention, the method further includes: acquiring, by the first device, at least two candidate pilot patterns, and obtaining a number of each candidate pilot pattern in the at least two candidate pilot patterns.

Optionally, as an embodiment of the present invention, the first device determines channel state information of the current communication channel that is in communication with the second device, where the first device receives the current pilot signal that is sent by the second device by using the current pilot pattern. The first device determines channel state information of the current communication channel by using the current pilot signal, wherein the channel state information includes a delay spread of the current communication channel and a Doppler shift spread.

It should be understood that the current pilot pattern may be a default initial pilot pattern or a pilot pattern configured in current communication.

Specifically, if the first device is a network device and the second device is a terminal device, the first device receives the uplink pilot signal sent by the second device by using the current pilot pattern, and determines the current communication channel according to the uplink pilot signal. Channel state information including delay spread and Doppler spread of the current communication channel.

Specifically, if the first device is the terminal device and the second device is the network device, the first device receives the downlink pilot signal sent by the second device by using the current pilot pattern, and determines the current communication channel according to the downlink pilot signal. Channel state information including delay spread and Doppler spread of the current communication channel.

Optionally, as an embodiment of the present invention, the first device determines, according to the status information of the current communication channel, the target pilot pattern from the at least two candidate pilot patterns, including: the first device according to the delay extension, and the Doppler The correspondence between the frequency shift extension and the pilot pattern determines a target pilot pattern corresponding to the current delay spread and the current Doppler frequency domain extension from the at least two candidate pilot patterns.

Specifically, an identical lookup table may be pre-stored in the first device and the second device, where the lookup table includes three items of delay extension, Doppler spread, and pilot pattern, and the corresponding relationship between them is performed. Therefore, both the terminal device and the network device can look up the target pilot pattern corresponding to the current delay spread and the current Doppler frequency domain extension from the lookup table.

As shown in Table 1, the table characterizes the correspondence table of delay spread, Doppler spread, and optimal pilot pattern.

Table 1 Table of delay spread, Doppler spread and mapping of optimal pilot patterns

It should be understood that 16 preset candidate pilot patterns are included in the table 1. The number and division manner of the pilot patterns of the table are merely exemplary, and other forms of lookup tables may be used according to actual channel state information. The invention is not limited thereto.

Optionally, as an embodiment of the present invention, the first device is a network device, and the second device is a terminal device. Before the first device receives the current pilot signal sent by the second device by using the current pilot pattern, the method further includes: The first device sends the downlink scheduling signaling to the second device, where the downlink scheduling signaling carries the identifier information of the current pilot pattern; or the first device sends the high layer signaling to the second device, so that the second device uses the current The current pilot signal sent by the pilot pattern, where the high layer signaling carries the identification information of the current pilot pattern.

Optionally, as an embodiment of the present invention, the first device is a terminal device, and the second device is a network device. Before the first device receives the current pilot signal sent by the second device by using the current pilot pattern, the method further includes: The first device receives the downlink scheduling signaling sent by the second device, where the downlink scheduling signaling carries the identifier information of the current pilot pattern; or the first device receives the high layer signaling sent by the second device, where the high layer signaling The identifier information of the current pilot pattern is carried in the middle.

FIG. 5 is a schematic flowchart of a method for configuring a pilot signal according to another embodiment of the present invention. As shown in FIG. 5, the method 500 includes:

Step 510: The first device determines N spectral efficiencies corresponding to when the N types of candidate pilot patterns are used to communicate with the second device, where N is a positive integer.

Step 520: The first device selects, as the target pilot pattern, a candidate pilot pattern corresponding to the largest spectral efficiency among the N spectral efficiencies from the candidate pilot patterns in the N.

It should be understood that if the first device is a network device, then the second device is a terminal device; Conversely, if the first device is a terminal device, then the second device is a network device. It should also be understood that the status information of the current communication channel includes related information capable of characterizing the channel state in the current communication scenario, such as delay spread of the current channel, Doppler spread, etc., and the present invention is not limited thereto.

Where N _t and N _f are the sampling intervals of the pilot in the time and frequency dimensions, f _Dmax is the maximum Doppler shift, τ _max is the maximum delay spread, T _symbol is the length of one OFDM symbol, and Δf is Subcarrier spacing. This ensures that the pilot time and frequency spacing does not exceed the channel coherence time and the coherence bandwidth, respectively.

Optionally, as an embodiment of the present invention, the first device is a network device, and the second device is a terminal device, where the first device determines N spectral efficiencies corresponding to when the N candidate candidate pilot patterns are respectively used to communicate with the second device. The first device configures an ith candidate pilot pattern of the N candidate pilot patterns as a current pilot pattern, where 1≤i≤N; the first device sends downlink scheduling signaling to the second device, and Transmitting the current downlink pilot signal by using the ith pilot pattern, where the downlink scheduling signaling carries the identifier information of the ith pilot pattern; or the first device sends the high layer signaling to the second device, and uses the ith The pilot pattern transmits the current downlink pilot signal, where the high-level signaling carries the identification information of the i-th pilot pattern.

Optionally, as an embodiment of the present invention, the first device is a terminal device, and the second device is a network device, and the first device determines N spectral efficiencies corresponding to when the N types of candidate pilot patterns are respectively used to communicate with the second device. The first device configures an ith candidate pilot pattern of the N candidate pilot patterns as a current pilot pattern, where 1≤i≤N; the first device sends uplink scheduling signaling to the second device, so that The second device transmits the current uplink pilot signal by using the ith pilot pattern, where the uplink scheduling signaling carries the identifier information of the ith pilot pattern; or the network device sends the high layer signaling to the terminal device, Therefore, the terminal device sends the current uplink pilot signal by using the ith pilot pattern, where the high-level signaling carries the identifier information of the ith pilot pattern.

Optionally, as an embodiment of the present invention, the first device is a network device, and the second device is a terminal device, where the first device determines N spectral efficiencies corresponding to when the N candidate candidate pilot patterns are respectively used to communicate with the second device. The method includes: the first device scheduling, the second device, using the ith pilot pattern Data transmission; the first device or the second device determines a spectral efficiency of data transmission using the ith pilot pattern.

Specifically, the first device or the second device may calculate the frequency efficiency S(i) of the uplink data transmission, specifically, the “the total number of bits of the data transmission correctly” in a period of time, and then calculate the spectrum efficiency according to the following formula:

The first network device or the second network device acquires the N frequency efficiencies, and selects a candidate pilot pattern corresponding to the maximum frequency efficiency from the N spectral efficiencies as the target pilot pattern.

FIG. 6 is a schematic flowchart of a method for configuring a pilot signal according to an embodiment of the present invention. The specific flow chart of the method is as follows:

In step 601, candidate pilot patterns of 16 channel scenes are preset and numbered separately. The network device and the terminal device preset the 16 pilot pattern and its number, respectively.

It should be understood that the execution body of the candidate pilot pattern may be a separate network device, or may be a network device or the like, and the present invention is not limited thereto.

Step 602: The network device initializes the current pilot pattern number to a preset default pilot pattern.

In step 603, the network device sends the indication information to the terminal device, where the indication information is used to indicate that the terminal device performs the configuration of the uplink pilot information by using the current pilot pattern.

Specifically, the network device may send the uplink scheduling signaling by using the pilot pattern number configuration message sending module, where the uplink scheduling signaling carries the number of the current pilot pattern to indicate the used pilot pattern of the current scheduling subframe of the terminal device. Or the network device can also send the high-level signaling by using the pilot pattern number configuration message sending module, where the high-level signaling carries the number of the current pilot pattern, and semi-statically configures the pilot pattern number used by the terminal device for a certain period of time. The current period of time may be the time occupied by 100 subframes, or 3 seconds, 5 seconds, etc., and the present invention is not limited thereto. It should be understood that the above indication information may also be carried in other messages, and the present invention is not limited thereto.

Step 604: The terminal device determines the current pilot pattern according to the indication information received in step 603, and sends the uplink pilot by using the current pilot pattern.

Specifically, the terminal device may receive the current pilot pattern number in step 603 through the pilot pattern number configuration message receiving module, and send the corresponding uplink pilot signal through the uplink pilot transmission module.

Step 605: The network device receives the uplink pilot sent by the terminal device in step 604 by using the current pilot pattern, and measures delay spread and Doppler spread of the uplink channel.

Specifically, the network device may measure delay spread and Doppler spread of the uplink channel by using an uplink channel measurement module; further, channel estimation may be performed by using a “channel estimation module” by using a current pilot number, and the result of the channel estimation is used for Subsequent equalization processing.

Step 606: The network device selects a target pilot pattern number according to the measured channel delay spread and Doppler spread, and updates the current pilot pattern number to the target pilot pattern.

Specifically, the network device selects an optimal target pilot pattern number by using an optimal pilot pattern selection module. Specifically, the target pilot pattern number may be selected by searching for the foregoing Table 1.

It should be understood that the foregoing steps 601 to 606 may be periodically repeated between the network device and the terminal device, and the period may be 300 milliseconds or 500 milliseconds, etc., and the foregoing steps may be triggered according to the service type change to meet different terminal devices. In the application scenario, configure a pilot distribution pattern suitable for the application scenario in which it is located.

FIG. 7 is a schematic flowchart of a method for configuring a pilot signal according to another embodiment of the present invention. The specific flow chart of the method is as follows:

In step 701, pilot patterns of 16 channel scenes are preset and numbered separately. The network device and the base station side respectively preset the 16 pilot pattern and its number.

As shown in Table 1 above, the table characterizes the correspondence table of delay spread, Doppler spread, and optimal pilot pattern.

Step 702: The network device initializes the current pilot pattern number to a preset default pilot pattern.

Step 703: The terminal device receives the indication information sent by the network device, where the indication information is used to indicate the terminal device, and the network device sends the downlink pilot information by using the current pilot pattern.

Specifically, the network device may send the downlink scheduling signaling by using the pilot pattern number configuration message sending module, where the downlink scheduling signaling carries the number of the current pilot pattern to indicate the used pilot pattern of the current scheduling subframe of the terminal device. Or the network device can also send the high-level signaling by using the pilot pattern number configuration message sending module, where the high-level signaling carries the number of the current pilot pattern, and semi-statically configures the pilot pattern number used by the terminal device for a certain period of time. . It should be understood that the above indication information may also be carried in other messages, and the present invention is not limited thereto.

At the same time, the terminal device receives the downlink pilot transmitted by the network device using the current pilot pattern.

Specifically, the terminal device may receive the current pilot pattern number in step 703 through the pilot pattern number configuration message receiving module, and send the corresponding uplink pilot signal through the uplink pilot transmission module.

Step 704: The terminal device receives the downlink pilot transmitted by the network device in step 704, and uses the downlink pilot to measure delay spread and Doppler spread of the downlink channel.

Specifically, the terminal device may measure the delay spread and the Doppler spread of the downlink channel by using the downlink channel measurement module; further, the channel estimation may be performed by using the “channel estimation module” by using the current pilot number, and the result of the channel estimation is used for Subsequent equalization processing.

Step 705: The terminal device selects a target pilot pattern number according to the measured channel delay spread and Doppler spread, and updates the current pilot pattern number to the target pilot pattern.

Specifically, the terminal device selects an optimal target pilot pattern number by using an optimal pilot pattern selection module. Specifically, the target pilot pattern number may be selected by searching for the foregoing Table 1.

Step 706: The terminal device feeds back the selected target pilot pattern number to the network device. Specifically, the terminal device may notify the network device of the selected target pilot pattern number by the optimal pilot number message sending module.

Step 707: After receiving the target pilot pattern number fed back by the terminal device, the network device updates the current pilot pattern number to the target pilot pattern number fed back by the terminal device.

It should be understood that, between the network device and the terminal device, the foregoing steps 501 to 707 may be periodically repeated to meet the configuration of the pilot distribution pattern suitable for the application scenario in which the terminal device is configured in different application scenarios.

FIG. 8 is a schematic flowchart of a method for configuring a pilot signal according to another embodiment of the present invention. The specific flow chart of the method is as follows:

In step 801, pilot patterns of 16 channel scenes are preset and numbered separately. The network device and the base station side respectively preset the 16 pilot patterns and their numbers, for example, may be sequentially numbered starting from the number n=1.

Step 802: The network device initializes a pilot pattern whose current pilot pattern number is corresponding to the number n=1.

Step 803: The network device sends the indication information to the terminal device, where the indication information is used to indicate that the terminal device performs the configuration of the uplink pilot information by using the current pilot pattern.

Specifically, the network device may send the uplink scheduling signaling by using the pilot pattern number configuration message sending module, where the current scheduling pattern carries the number n=1 of the current pilot pattern to indicate that the terminal device currently uses the scheduled subframe. Pilot pattern number; or, the network device can also pass the pilot map The case number configuration message sending module sends the high layer signaling, where the high layer signaling carries the current pilot pattern number n=1, and semi-statically configures the pilot pattern number used by the terminal device for a period of time. It should be understood that the above indication information may also be carried in other messages, and the present invention is not limited thereto.

Step 804: When receiving the number n=1 of the current pilot pattern sent by the network device, the terminal device sends the uplink pilot by using the pilot pattern.

Specifically, the terminal device receives the indication information carrying the current pilot pattern number by using the “pilot pattern number configuration message receiving module”, and sends the uplink pilot corresponding to the pilot distribution pattern by using the “uplink pilot transmission module”.

Step 805: After receiving the uplink pilot sent by the terminal device in step 804, the network device performs channel estimation according to the current pilot distribution pattern number n. Specifically, the channel estimation module of the network device may be used for channel estimation and channel estimation. The result can be used for subsequent equalization processing.

Step 806: The network device schedules the terminal device to perform uplink data transmission, and collects a spectrum efficiency S(n) of the uplink data transmission.

Specifically, the network device schedules the terminal device to perform uplink data transmission through the “uplink data transmission scheduling module”, and determines the spectrum efficiency of the uplink data transmission by using the “uplink spectrum efficiency statistics module”. The frequency efficiency statistics method specifically includes: “counting the total number of bits of data transmission correctly” for a period of time, for example, the period of time may be, and then calculating the spectrum efficiency according to the following formula:

Spectrum efficiency = total number of bits for data transmission / (total duration of data transmission × transmission bandwidth)

Among them, the unit of spectral efficiency is (bits/second/Hz).

Further, the current spectrum pattern number n=n+1 is updated, and the above steps 603 to 606 are repeated until n=16, and the frequency efficiencies S(1), S(2)...S(16) are respectively obtained.

Step 807: The network device selects, from the spectral efficiency 16 spectral efficiencies, the highest spectral efficiency S(k), 1 ≤ k ≤ n, and the frequency efficiency S(k) corresponds to the pilot pattern number k.

Step 808: The network device sends indication information to the terminal device, where the indication information carries a pilot pattern number k.

Specifically, the network device may send the uplink scheduling signaling (carrying the current pilot pattern number k) by using the “pilot pattern number configuration message sending module” to indicate the pilot pattern number k used by the terminal device for the current scheduling subframe, or send a high-level letter. Let (with the current pilot pattern number k), configure the pilot number used by the terminal device for a period of time in a semi-static manner.

Periodically repeat steps 802 to 808 above, which can be configured optimally in different application scenarios. The appropriate pilot distribution may be 300 milliseconds, 500 milliseconds, or the like, and the present invention is not limited thereto.

FIG. 9 is a schematic flowchart of a method for configuring a pilot signal according to another embodiment of the present invention. The specific flow chart of the method is as follows:

In step 901, pilot patterns of 16 channel scenes are preset and numbered separately. The network device and the base station side respectively preset the 16 pilot patterns and their numbers, for example, may be sequentially numbered starting from the number n=1.

Step 902: The network device initializes a pilot pattern whose current pilot pattern number is corresponding to the number n=1.

Step 903: The network device sends the indication information to the terminal device, where the indication information is used to notify the terminal device that the network device sends the downlink pilot signal by using the current pilot pattern.

Specifically, the network device may send the downlink scheduling signaling by using the pilot pattern number configuration message sending module, where the downlink scheduling signaling carries the current pilot pattern number n=1, to indicate that the terminal device currently uses the scheduled subframe. The pilot pattern number; or the network device may also send the high-level signaling by using the pilot pattern number configuration message sending module, where the high-level signaling carries the current pilot pattern number n=1, and the semi-statically configured network device is currently in the current period of time. The pilot pattern number used. It should be understood that the above indication information may also be carried in other messages, and the present invention is not limited thereto.

Step 904: When the terminal device receives the number n=1 of the current pilot pattern sent by the network device, the terminal device performs channel estimation by using the pilot pattern.

Specifically, the terminal device receives the indication information carrying the current pilot pattern number through the “pilot pattern number configuration message receiving module”, and performs channel estimation through the “channel estimation module”, and the channel estimation result is used for subsequent equalization processing.

Step 905: The network device schedules the terminal device to perform downlink data transmission, and collects a spectrum efficiency S(n) of the downlink data transmission.

Specifically, the network device schedules the terminal device to perform downlink data transmission by using the “downlink data transmission scheduling module”, and determines the spectrum efficiency of the downlink data transmission by using the “downlink spectrum efficiency statistics module”. The frequency efficiency statistics method specifically includes: “counting the total number of bits of data transmission correctly” for a period of time, for example, the period may be 2 seconds, and then calculating the spectrum efficiency according to the following formula:

Among them, the unit of spectral efficiency is (bits/second/Hz).

Further, updating the current spectrum pattern number n=n+1, repeating the above steps 903 to 906, The frequency efficiency S(1), S(2)...S(16) are obtained until n=16, respectively.

Step 906: The network device selects, from the spectral efficiency 16 spectral efficiencies, the highest spectral efficiency S(k), 1 ≤ k ≤ n, and the frequency efficiency S(k) corresponds to the pilot pattern number k.

Step 907: The network device sends indication information to the terminal device, where the indication information carries a pilot pattern number k.

Specifically, the network device may send the downlink scheduling signaling (carrying the current pilot pattern number k) to indicate the pilot pattern number k used by the terminal device in the current scheduling subframe, or send a high-level letter through the “pilot pattern number configuration message sending module”. Let (with the current pilot pattern number k), semi-statically configure the pilot number used by the network device for a period of time.

The above-mentioned steps 902 to 907 are periodically repeated, and the most suitable pilot distribution can be configured in different application scenarios. The period interval can be 500 milliseconds, and the present invention is not limited thereto.

It should be understood that, in the foregoing step 905 or step 906, the statistics of the spectrum efficiency of the downlink data and the pilot pattern corresponding to the maximum spectrum efficiency may also be performed by the terminal device.

FIG. 10 is a first device for configuring a pilot signal according to an embodiment of the present invention. As shown in FIG. 10, the first device 1000 includes:

The determining unit 1001 is configured to determine channel state information of a current communication channel that communicates with the second device.

The determining unit 1001 is further configured to determine, according to the status information of the current communication channel, a target pilot pattern from the at least two candidate pilot patterns, where the pilot pattern is used to represent a time-frequency resource distribution of the pilot signal.

The sending unit 1002 is configured to send the identifier information of the target pilot pattern to the second device, where the identifier information of the target pilot pattern is used to instruct the second device to communicate with the first device 1000 by using the target pilot distribution pattern.

Optionally, as an embodiment of the present invention, the determining unit 1001 is specifically configured to: receive a current pilot signal that is sent by the second device by using a current pilot pattern; and determine, by using the current pilot signal, Channel state information of the current communication channel, wherein the channel state information includes a delay spread of the current communication channel and a Doppler shift spread.

Optionally, as an embodiment of the present invention, the determining unit 1001 is specifically configured to: determine, according to a correspondence between a delay spread, a Doppler shift, and a pilot pattern, from the at least two candidate pilot patterns. The target pilot pattern corresponding to the current delay spread and the current Doppler frequency domain spread.

Optionally, as an embodiment of the present invention, the first device is a network device, and the second device is a terminal device, where the sending unit 1002 is specifically configured to: send downlink scheduling signaling to the second device, where The downlink scheduling signaling carries the identifier information of the current pilot pattern, or sends the high layer signaling to the second device, so that the current device transmits the current pilot signal by using the current pilot pattern, where The high layer signaling carries identification information of the current pilot pattern.

Optionally, as an embodiment of the present invention, the first device is a terminal device, the second device is a network device, and the sending unit 1002 is specifically configured to: receive downlink scheduling signaling sent by the second device. And the downlink scheduling signaling carries the identifier information of the current pilot pattern; or receives the high layer signaling sent by the second device, where the high layer signaling carries the current pilot pattern Identification information.

FIG. 11 is a first device for configuring a pilot signal according to an embodiment of the present invention. As shown in FIG. 11, the first device 1101 includes:

The determining unit 1101 is configured to determine N spectral efficiencies corresponding to when the N types of candidate pilot patterns are respectively used to communicate with the second device.

The selecting unit 1102 is configured to select, as the target pilot pattern, a candidate pilot pattern corresponding to the largest spectral efficiency among the N spectral efficiencies from the candidate pilot patterns in the N.

Optionally, as an embodiment of the present invention, the first device is a network device, and the second device is a terminal device, where the first device further includes a sending unit, where the sending unit is specifically configured to: And configuring an ith candidate pilot pattern in the N candidate pilot patterns as a current pilot pattern, where 1≤i≤N; transmitting downlink scheduling signaling to the second device, and using the ith The pilot pattern transmits the current downlink pilot signal, where the downlink scheduling signaling carries the identifier information of the ith pilot pattern; or sends high layer signaling to the second device, and uses the The ith pilot pattern transmits the current downlink pilot signal, where the high layer signaling carries the identifier information of the ith pilot pattern.

Optionally, as an embodiment of the present invention, the first device is a network device, and the second device is a terminal device, where the first device further includes a sending unit, where the sending unit is specifically configured to: Configuring, by a device, an ith candidate pilot pattern of the N candidate pilot patterns as a current pilot pattern, where 1≤i≤N; the first device sends uplink scheduling signaling to the second device So that the second device sends the current uplink pilot signal by using the ith pilot pattern, where the uplink scheduling signaling carries the identifier information of the ith pilot pattern; or The network device sends the high-level signaling to the terminal device, so that the terminal device sends the current uplink pilot signal by using the ith pilot pattern, where the high-level signaling carries the ith pilot pattern. Identification information.

Optionally, as an embodiment of the present invention, the determining unit 1101 is specifically configured to: schedule, by the second device, data transmission by using the ith pilot pattern; and the first device determines to use the ith guide Frequency pattern for spectral efficiency of data transmission.

As shown in FIG. 12, the system includes a network device and a terminal device, where the network device includes: an equalization module, a channel estimation module, an uplink channel measurement module, an optimal pilot pattern selection module, a pilot pattern number configuration message sending module, and a coding a modulation module or the like; the terminal device includes: an uplink pilot transmission module, a pilot pattern number configuration message receiving module, and a decoding and decoding module.

The network device acquires candidate pilot patterns of 16 channel scenarios preset and numbers them separately. The network device and the base station side respectively preset the 16 pilot pattern and its number, and initialize the current pilot pattern number to a preset default pilot pattern.

The network device sends the indication information to the terminal device by using the “pilot pattern number configuration message sending module”, where the indication information is used to indicate that the terminal device performs uplink pilot information by using the current pilot pattern. Configuration.

The terminal device determines the current pilot pattern by using the indication information received by the “pilot pattern number configuration message receiving module”, and uses the current pilot pattern to transmit the uplink pilot by using the “uplink pilot transmission module”.

The network device may measure the delay spread and Doppler spread of the uplink channel through the “uplink channel measurement module”; further, the channel estimation may be performed through the “channel estimation module” by using the current pilot number, and the result of the channel estimation is used for subsequent Balanced processing.

The network device selects an optimal target pilot pattern number by using an “optimal pilot pattern selection module”. Specifically, the target pilot pattern number may be selected by searching for the foregoing Table 1.

The channel estimation module is configured to perform channel estimation according to the number of the target pilot pattern, and the equalization module is configured to perform equalization processing according to the result of the channel estimation.

FIG. 13 is a schematic block diagram of a system for configuring a pilot signal according to another embodiment of the present invention. The system includes a network device and a terminal device. As shown in FIG. 13, the network device includes: an optimal pilot number message receiving module, a pilot pattern number configuration message sending module, a downlink pilot transmitting module, a decoding decoding module, and a coding. Modulation module, etc. The terminal device includes: an optimal pilot number message sending module, an optimal pilot pattern selecting module, a downlink channel measuring module, a pilot pattern number configuration message receiving module, a channel estimation module, an equalization module, and the like.

The network device and the base station side respectively preset the 16 pilot pattern and its number, and the network device initializes the current pilot pattern number to a preset default pilot pattern.

The "pilot pattern number configuration message sending module" in the network device is configured to send the indication information to the terminal device, where the indication information is used to carry the pilot configuration information required by the terminal device, and the network device may send the message by using the "pilot pattern number configuration message". The module sends a downlink scheduling signaling, where the downlink scheduling signaling carries the number of the current pilot pattern to indicate the used pilot pattern number of the currently scheduled subframe of the terminal device; or the network device can also pass the pilot pattern. The number configuration message sending module sends a high-level signaling, where the high-level signaling carries the number of the current pilot pattern, and semi-statically configures the pilot pattern number used by the terminal device for a period of time. It should be understood that the above indication information may also be carried in other messages, and the present invention is not limited thereto.

The terminal device receives the current pilot pattern through its "pilot pattern number configuration message receiving module" No. The corresponding uplink pilot is transmitted through the “uplink pilot transmission module”.

The terminal device measures the delay spread and the Doppler spread of the downlink channel through the “downlink channel measurement module”; further, the channel estimation may be performed by using the “channel estimation module” by using the current pilot number, and the result of the channel estimation is used for “equalization”. Subsequent equalization processing of the module.

The terminal device selects an optimal target pilot pattern number by using an “optimal pilot pattern selection module”. Specifically, the target pilot pattern number may be selected by searching for the above table 1.

The terminal device informs the network device of the selected target pilot pattern number through the "optimal pilot number message sending module".

After receiving the target pilot pattern number fed back by the terminal device, the network device updates the current pilot pattern number to the target pilot pattern number fed back by the terminal device.

FIG. 14 is a schematic block diagram of a system for configuring a pilot signal according to another embodiment of the present invention. As shown in FIG. 14, the system includes a network device and a terminal device, where the network device includes: an equalization module, a channel estimation module, an uplink data transmission scheduling module, an uplink frequency efficiency statistics module, an optimal pilot pattern selection module, and a pilot pattern. The number configuration message sending module and the like; the terminal device includes: an uplink pilot transmitting module, a pilot pattern number configuration message receiving module, and a decoding decoding module.

The network device and the terminal device respectively preset the 16 pilot patterns and their numbers, for example, may be sequentially numbered starting from the number n=1, and the network device initializes the current pilot pattern number to the pilot pattern corresponding to the number n=1.

The network device may send the uplink scheduling signaling by using the “pilot pattern number configuration message sending module”, where the current scheduling pattern carries the number n=1 of the current pilot pattern to indicate the used guide of the current scheduling subframe of the terminal device. The frequency pattern number; or the network device may also send the high-level signaling by using the “pilot pattern number configuration message sending module”, where the high-level signaling carries the current pilot pattern number n=1, and the semi-static configuration terminal device is currently in a period of time. The pilot pattern number used internally. It should be understood that the above indication information may also be carried in other messages, and the present invention is not limited thereto.

The terminal device receives the indication information carrying the current pilot pattern number through the “pilot pattern number configuration message receiving module”, and transmits the uplink pilot corresponding to the pilot distribution pattern by using the “uplink pilot transmission module”.

After receiving the uplink pilot sent by the terminal device, the network device according to the current pilot distribution pattern The number n performs channel estimation. Specifically, the channel estimation module of the network device can be used for channel estimation, and the result of the channel estimation can be used for subsequent equalization processing.

Specifically, the network device schedules the terminal device to perform uplink data transmission by using the “uplink data transmission scheduling module”, and determines the spectrum efficiency of the uplink data transmission by using the “uplink spectrum efficiency statistics module”, and calculates the spectrum efficiency S of the uplink data transmission. n).

Further, the network device updates the current spectrum pattern number n=n+1 to obtain frequency efficiency S(1), S(2)...S(16), respectively.

The network device selects the highest spectral efficiency S(k) from the spectral efficiency 16 spectral efficiencies through the "optimal pilot pattern selection module", 1 ≤ k ≤ n, and the pilot pattern number k corresponding to the frequency efficiency S(k) .

The network device sends the uplink scheduling signaling (carrying the current pilot pattern number k) to indicate the pilot pattern number k used by the terminal device in the current scheduling subframe, or sends the high layer signaling (carrying the current) by using the “pilot pattern number configuration message sending module”. The pilot pattern number k) configures the pilot number used by the terminal device for a period of time in a semi-static manner.

FIG. 15 is a schematic block diagram of a system for configuring a pilot signal according to another embodiment of the present invention. As shown in FIG. 15, the system includes a network device and a terminal device, where the network device includes: a downlink data transmission scheduling module, a downlink frequency efficiency statistics module, an optimal pilot pattern selection module, a pilot pattern number configuration message sending module, and a downlink. a pilot transmission module or the like; the terminal device includes: an equalization module, a channel estimation module, a pilot pattern number configuration message receiving module, a demodulation decoding code block, and the like.

The network device may send the downlink scheduling signaling by using the “pilot pattern number configuration message sending module”, where the downlink scheduling signaling carries the current pilot pattern number n=1, to indicate the used guide of the current scheduling subframe of the terminal device. The frequency pattern number is used; or the network device can also send the high-level signaling by using the “pilot pattern number configuration message sending module”, where the high-level signaling carries the current pilot pattern number n=1, and the semi-static configuration network device is currently in a period of time. The pilot pattern number used internally. It should be understood that the above indication information may also be carried in other messages, and the present invention is not limited thereto.

The terminal device receives and carries the current pilot map by using the “pilot pattern number configuration message receiving module” The indication information of the case number is used for channel estimation by the "channel estimation module", and the channel estimation result is used for subsequent equalization processing by the "equalization module".

The network device schedules the terminal device to perform downlink data transmission through the “downlink data transmission scheduling module”, and determines the spectrum efficiency of the downlink data transmission through the “downlink spectrum efficiency statistics module”, and collects the spectrum efficiency of the downlink data transmission S(n). .

The network device selects the highest spectral efficiency S(k), 1≤k≤n, and the pilot pattern number k corresponding to the frequency efficiency S(k) from the 16 spectral efficiencies through the "optimal pilot pattern selection module".

The network device sends the downlink scheduling signaling (carrying the current pilot pattern number k) to indicate the pilot pattern number k used by the terminal device in the current scheduling subframe, or sends the high layer signaling (carrying the current) through the "pilot pattern number configuration message sending module". Pilot pattern number k), semi-static way to configure the pilot number used by the network device for a period of time.

16 is a schematic device diagram of a first device according to another embodiment of the present invention. As shown in FIG. 16, the first device 1600 may include a receiver 1601, a processor 1602, a transmitter 1603, a memory 1604, and a bus system 1605. The processor 1602 and the memory 1603 are connected by a bus system 1605. The memory 1603 is for storing instructions, the processor 1602 is configured to execute the instructions stored in the memory 1604, such that the first device 1600 performs a pilot configuration 200, the receiver 1601 is configured to receive information of the second device, and the transmitter 1603 is configured to Send information to the second device.

The first device 1600 can implement the corresponding processes in the foregoing method embodiments. To avoid repetition, details are not described herein again.

It should be understood that, in the embodiment of the present invention, the processor 1602 may be a central processing unit (CPU), and the processor 1602 may be another general-purpose processor or a digital signal processor (DSP). , Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and the like. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

Memory 1604 can include read only memory and random access memory and provides instructions and data to processor 1602. A portion of the memory 1604 can also include a non-volatile random access memory. For example, the memory 1604 can also store information of the device type.

The bus system 1605 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 1605 in the figure. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 1602 or an instruction in a form of software. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, and the like. The storage medium is located in memory 1604, and processor 1602 reads the information in memory 1604 and, in conjunction with its hardware, performs the steps of the above method. To avoid repetition, it will not be described in detail here.

17 is a schematic device diagram of a first device according to another embodiment of the present invention. As shown in FIG. 17, the first device 1700 may include a receiver 1701, a processor 1702, a transmitter 1703, a memory 1704, and a bus system 1705. The processor 1702 and the memory 1703 are connected by a bus system 1705. The memory 1703 is used to store instructions, the processor 1702 is configured to execute the instructions stored in the memory 1704, such that the first device 1700 performs a pilot configuration method 500, the receiver 1701 is configured to receive information of the second device, and the transmitter 1703 is configured to Send information to the second device.

The first device 1700 can implement the corresponding processes in the foregoing method embodiments. To avoid repetition, details are not described herein again.

It should be understood that, in the embodiment of the present invention, the processor 1702 may be a central processing unit (CPU), and the processor 1702 may be another general-purpose processor or a digital signal processor (DSP). , Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and the like. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

Memory 1704 can include read only memory and random access memory and provides instructions and data to processor 1702. A portion of the memory 1704 can also include a non-volatile random access memory. For example, the memory 1704 can also store information of the device type.

The bus system 1705 can include a power bus and a control bus in addition to the data bus. And status signal bus, etc. However, for clarity of description, various buses are labeled as bus system 1705 in the figure.

In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 1702 or an instruction in a form of software. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, and the like. The storage medium is located in memory 1704, and processor 1702 reads the information in memory 1704 and, in conjunction with its hardware, performs the steps of the above method. To avoid repetition, it will not be described in detail here.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A method for configuring a pilot signal, comprising:

Determining, by the first device, channel state information of a current communication channel in communication with the second device;

Determining, by the first device, the target pilot pattern from the at least two candidate pilot patterns according to the status information of the current communication channel, where the pilot pattern is used to represent a time-frequency resource distribution of the pilot signal;

The first device sends the identifier information of the target pilot pattern to the second device, where the identifier information of the target pilot pattern is used to indicate that the second device uses the target pilot distribution pattern and the The first device communicates.
The method according to claim 1, wherein the first device determines channel state information of a current communication channel that communicates with the second device, including:

Receiving, by the first device, a current pilot signal that is sent by the second device by using a current pilot pattern;

Determining, by the first device, channel state information of the current communication channel by using the current pilot signal, where the channel state information includes a delay spread of the current communication channel and a Doppler shift extension.
The method according to claim 2, wherein the determining, by the first device, the target pilot pattern from the at least two candidate pilot patterns according to the status information of the current communication channel, includes:

Determining, from the at least two candidate pilot patterns, the current delay extension and the current current, according to a correspondence between a delay spread, a Doppler shift spread, and a pilot pattern. The Pule frequency domain extends the corresponding target pilot pattern.
The method according to claim 3, wherein the first device is a network device, and the second device is a terminal device, and the first device receives a current guide sent by the second device by using a current pilot pattern. Before the frequency signal, the method further includes:

The first device sends downlink scheduling signaling to the second device, where the downlink scheduling signaling carries the identifier information of the current pilot pattern; or

The first device sends the high-level signaling to the second device, so that the current device transmits the current pilot signal by using the current pilot pattern, where the high-layer signaling carries the current pilot pattern. Identification information.
The method according to claim 3, wherein said first device is a terminal device The second device is a network device, and before the first device receives the current pilot signal that is sent by the second device by using the current pilot pattern, the method further includes:

The first device receives the downlink scheduling signaling sent by the second device, where the downlink scheduling signaling carries the identifier information of the current pilot pattern; or

The first device receives the high layer signaling sent by the second device, where the high layer signaling carries the identifier information of the current pilot pattern.
A method for configuring a pilot signal, comprising:

Determining, by the first device, N spectral efficiencies corresponding to when the N types of candidate pilot patterns are respectively used to communicate with the second device, where N is a positive integer;

The first device selects, as the target pilot pattern, a candidate pilot pattern corresponding to the largest spectral efficiency among the N spectral efficiencies from the candidate pilot patterns in the N.
The method according to claim 6, wherein the first device is a network device, the second device is a terminal device, and the first device determines that the N candidate antenna patterns are respectively used with the second device. The corresponding N spectral efficiencies when communicating, including:

The first device configures an ith candidate pilot pattern of the N candidate pilot patterns as a current pilot pattern, where 1≤i≤N;

The first device sends the downlink scheduling signaling to the second device, and sends the current downlink pilot signal by using the ith pilot pattern, where the downlink scheduling signaling carries the ith pilot Identification information of the frequency pattern; or

The first device sends the high-level signaling to the second device, and sends the current downlink pilot signal by using the ith pilot pattern, where the ith pilot pattern is carried in the high-layer signaling Identification information.
The method according to claim 6, wherein the first device is a terminal device, the second device is a network device, and the first device determines that the N candidate antenna patterns are respectively used by the second device. The corresponding N spectral efficiencies in communication, including:

The first device configures an ith candidate pilot pattern of the N candidate pilot patterns as a current pilot pattern, where 1≤i≤N;

The first device sends the uplink scheduling signaling to the second device, so that the second device sends the current uplink pilot signal by using the ith pilot pattern, where the uplink scheduling signaling carries Identification information of the ith pilot pattern; or

Transmitting, by the network device, high layer signaling to the terminal device, so that the terminal device utilizes the The ith pilot pattern transmits the current uplink pilot signal, where the high layer signaling carries the identifier information of the ith pilot pattern.
The method according to claim 6, wherein the first device determines N spectral efficiencies corresponding to when the N types of candidate pilot patterns are respectively used to communicate with the second device, including:

The first device schedules, by the second device, data transmission by using the ith pilot pattern;

The first device determines a spectral efficiency of data transmission using the ith pilot pattern.
A first device for configuring a pilot signal, comprising:

a determining unit, configured to determine channel state information of a current communication channel that communicates with the second device;

The determining unit is further configured to determine, according to the status information of the current communication channel, a target pilot pattern, where the pilot pattern is used to represent a time-frequency resource distribution of the pilot signal, from the at least two candidate pilot patterns. ;

a sending unit, where the sending unit is configured to send the identifier information of the target pilot pattern to the second device, where the identifier information of the target pilot pattern is used to indicate that the second device uses the target pilot distribution pattern and The first device communicates.
The first device according to claim 10, wherein the determining unit is specifically configured to:

Receiving, by the second device, a current pilot signal transmitted by using a current pilot pattern;

Determining channel state information of the current communication channel by using the current pilot signal, wherein the channel state information includes a delay spread of the current communication channel and a Doppler shift spread.
The first device according to claim 11, wherein the determining unit is specifically configured to:

And determining, from the at least two candidate pilot patterns, the current delay spread and the current Doppler frequency domain extension according to a delay spread, a Doppler shift spread, and a pilot pattern correspondence relationship. Corresponding to the target pilot pattern.
The first device according to claim 12, wherein the first device is a network device, and the second device is a terminal device, and the sending unit is specifically configured to:

Transmitting the downlink scheduling signaling to the second device, where the downlink scheduling signaling carries the identifier information of the current pilot pattern; or

Transmitting high layer signaling to the second device, so that the second device utilizes a current pilot pattern The current pilot signal that is sent, where the high layer signaling carries the identification information of the current pilot pattern.
The first device according to claim 12, wherein the first device is a terminal device, the second device is a network device, and the sending unit is specifically configured to:

Receiving the downlink scheduling signaling sent by the second device, where the downlink scheduling signaling carries the identifier information of the current pilot pattern; or

Receiving the high layer signaling sent by the second device, where the high layer signaling carries the identifier information of the current pilot pattern.
A first device for configuring a pilot signal, comprising:

a determining unit, configured to determine N spectral efficiencies corresponding to when the N types of candidate pilot patterns are respectively used to communicate with the second device, where N is a positive integer;

And a selecting unit, configured to select, as the target pilot pattern, a candidate pilot pattern corresponding to a maximum spectral efficiency among the N spectral efficiencies from among the candidate pilot patterns in the N.
The first device according to claim 15, wherein the first device is a network device, the second device is a terminal device, and the first device further includes a sending unit, where the sending unit is specifically configured to: :

Configuring an i th candidate pilot pattern in the N candidate pilot patterns as a current pilot pattern, where 1≤i≤N;

Transmitting the downlink scheduling signaling to the second device, and transmitting the current downlink pilot signal by using the ith pilot pattern, where the downlink scheduling signaling carries the identifier information of the ith pilot pattern ;or

Sending the high-level signaling to the second device, and transmitting the current downlink pilot signal by using the ith pilot pattern, where the high-level signaling carries the identifier information of the ith pilot pattern.
The first device according to claim 15, wherein the first device is a terminal device, the second device is a network device, and the first device further includes a sending unit, where the sending unit is specifically configured to: :

The first device configures an ith candidate pilot pattern of the N candidate pilot patterns as a current pilot pattern, where 1≤i≤N;

The first device sends the uplink scheduling signaling to the second device, so that the second device sends the current uplink pilot signal by using the ith pilot pattern, where the uplink scheduling signaling carries Identification information of the ith pilot pattern; or

The network device sends the high-level signaling to the terminal device, so that the terminal device sends the current uplink pilot signal by using the ith pilot pattern, where the high-level signaling carries the ith pilot Identification information of the pattern.
The first device according to claim 15, wherein the determining unit is specifically configured to:

Scheduling the second device to perform data transmission by using the ith pilot pattern;

The first device determines a spectral efficiency of data transmission using the ith pilot pattern.