WO2016090567A1

WO2016090567A1 - Signal transmitting and receiving method and device

Info

Publication number: WO2016090567A1
Application number: PCT/CN2014/093440
Authority: WO
Inventors: 官磊; 马莎; 郑娟; 余政
Original assignee: 华为技术有限公司
Priority date: 2014-12-10
Filing date: 2014-12-10
Publication date: 2016-06-16
Also published as: CN106165333B; CN106165333A

Abstract

Provided in an embodiment of the present invention is a signal transmitting method, the method comprising: a base station of a U-LTE system acquires, in a time window, a right of use of a channel on an unlicensed frequency spectrum; after the right of use of the channel is obtained, the base station begins to transmit a first signal on the channel in the time window at first time; and the base station transmits an indication message at second time, the second time being not earlier than deadline time of the time window, and the indication message comprising the indication that the base station transmits the first signal in the time window. According to the method of the embodiment of the present invention, the base station transmits, after obtaining the right of use of the unlicensed frequency spectrum, the first signal as soon as possible, the first signal comprising but not being limited to one of a control channel, a data channel and a reference signal or the combination thereof, thus avoiding waste of resource caused by transmitting a filling signal, and improving utilization of the resource; and a user terminal demodulates or decodes, according to the indication message, a received signal correctly without a significant increase in the complexity of calculation.

Description

Method and device for transmitting and receiving signals

Technical field

Embodiments of the present invention relate to the field of communications, and in particular, to the field of competing wireless spectrum resources in communication devices.

Background technique

In the existing mobile communication network, the spectrum resources used by the operator are divided into two types, one is an unlicensed spectrum resource and the other is a licensed spectrum resource. Authorized spectrum resources, that is, only operators that have purchased the licensed spectrum have the right to use. Unlicensed spectrum resources do not need to be purchased, and they can be used free of charge as long as they meet certain requirements. Unlicensed spectrum resources are gradually receiving attention from operators today due to the scarcity of licensed frequency bands and high prices. How to reasonably and efficiently compete in the unlicensed frequency band to send resources is an urgent problem to be solved.

An existing method for competing resources is Listening Before Talk (LBT). The basic idea of LBT is: Before each communication device sends a signal on a certain channel, it needs to detect whether the current channel is idle, that is, Whether it is possible to detect that a nearby node is occupying the channel to transmit a signal, the detection process is called Clear Channel Assessment (CCA); if the channel is idle for a period of time, the communication device can send a signal. If the channel is detected to be occupied, the communication device is currently unable to transmit a signal.

This kind of competition is widely used in existing unlicensed spectrum, such as Wi-Fi systems. However, for a system with a fixed subframe boundary like the Unlicensed Long Term Evolution (U-LTE) system, directly applying this mechanism will bring about a problem of low resource utilization, which is related to a fixed subframe. The characteristics of the boundary are related:

Taking the U-LTE system as an example, the U-LTE system inherits the frame structure of the LTE system, and needs to have a relatively fixed frame structure, and the frame boundary or the subframe boundary is fixed in time, in other words, for a U In the case of an LTE system, a frame boundary or a subframe boundary corresponds temporally to a determined time, and a frame or subframe boundary includes a start time and a cutoff time of a frame or a subframe. Fixed frame boundary Or the manner of the subframe boundary has the following advantages: the synchronization complexity of the receiving end and the transmitting end is reduced; the neighboring cell can perform interference coordination by time synchronization, which is especially important for the TDD system; performing carrier aggregation of the unlicensed carrier and the authorized carrier The time synchronization between the unlicensed carrier and the authorized carrier can be ensured, and the uplink feedback channel can be transmitted on the authorized carrier, which reduces the transmission delay of the feedback channel.

When a communication device in a U-LTE system competes with a communication device of a Wi-Fi system for simultaneously competing resources of an unlicensed spectrum, a new problem arises: for a communication device of a Wi-Fi system, when it is determined that the channel can be occupied, Or, when it is confirmed that the transmission resource of the channel has been contending, the communication device directly transmits a signal containing valid data; but for the communication device in the U-LTE system, since the time at which the channel can be occupied is confirmed to be random, it is generally It is said that the time at which the channel can be occupied and the subframe boundary of the U-LTE system are often not aligned. If the communication device directly transmits a signal including valid data, the user equipment is limited by computing power and power consumption. It is difficult for the user equipment to blindly detect the received signal to correctly obtain valid data in the signal.

A solution to this problem is when the communication device in the U-LTE system confirms that the channel can be occupied, but the time at which the channel can be occupied is not aligned with the start time of the subframe, the communication device first sends a fill signal. To occupy the channel, prevent the channel from being occupied by other communication devices until the start time of the next subframe, the communication device of the U-LTE system transmits a signal containing valid data, the valid signal being different from the padding The signal, the effective signal refers to one or a combination of, but not limited to, a control channel, a data channel or a reference signal; those skilled in the art should know that when referring to the control channel and the data channel, it actually refers to being carried on the control channel. The signal corresponding to the data or the signal corresponding to the data carried on the data channel is not distinguished by the present invention. The prior art also has a problem in a specific application: the time length of one subframe in the existing LTE system or U-LTE is generally 1 ms, and for a communication device of LTE or U-LTE, a continuous occupation The length of the channel does not exceed 10 subframes. According to the prior art, the length of the padding signal sent by the U-LTE communication device after determining that the channel can be occupied is up to almost 1 subframe, so that even if 10 subframes are continuously transmitted, about 10% of the resources are generated. Waste, this pair It is unacceptable for the use of valuable wireless spectrum resources.

In summary, the prior art has a problem of low resource utilization.

Summary of the invention

In order to solve the problem of low resource utilization in the prior art, the embodiment of the present invention provides a method and an apparatus for transmitting a signal:

In a first aspect, an embodiment of the present invention provides a method for transmitting a signal, including:

The base station of the U-LTE system acquires the right to use the channel on the unlicensed spectrum in a time window;

After acquiring the usage right of the channel, the base station starts transmitting the first signal on the channel at a first moment in the time window; wherein the first signal includes at least one of the following: a control channel, Data channel, reference signal;

Sending, by the base station, an indication message at a second moment;

The second time is not earlier than the cutoff time of the time window; wherein the indication message includes an indication that the base station sends the first signal in the time window.

In a first possible implementation of the first aspect, there is a time interval between the cutoff time of the time window and the second time.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the time window includes a time length that is less than a time length of one subframe; or the time included in the time window The length is equal to the length of time of one subframe.

With reference to the first aspect, or any one of the possible implementations of the first to the second aspect of the first aspect, in a third possible implementation, the time window includes each part of time resources in two consecutive subframes.

With reference to the first aspect, or any one of the first to the third possible implementation manners of the first aspect, in the fourth possible implementation manner, the second time is located at a preset time of the subframe.

With reference to the first aspect, or any one of the first to fourth possible implementation manners of the first aspect, in the fifth possible implementation, the second time instant includes the time window deadline The start time of the next subframe of the subframe; or the second time includes a time corresponding to the N times of the end of the subframe where the time window is cut off, where the N symbols are not smaller than the Indicates the number of symbols occupied by the message.

With reference to the first aspect, or any one of the first to fifth possible implementation manners of the first aspect, in the sixth possible implementation, the indication message is transmitted on a channel of the licensed spectrum; or the indication message Transmission on the channel of the unlicensed spectrum.

With reference to the first aspect, or any one of the foregoing first to sixth possible implementation manners, in the seventh possible implementation, the first signal includes one of a control channel, a data channel, and a reference signal, or Combining, the indication message instructing the base station to send the first signal at the first moment in the time window; or the first signal includes a reference signal, the indication message indicating that the base station is in the The first signal is transmitted within a time window.

With reference to the first aspect, or any one of the first to seventh possible implementation manners of the first aspect, in an eighth possible implementation manner, after the acquiring, by the base station, the right to use the channel, Transmitting the first signal on the channel at the first moment in the window includes: the base station transmitting a reference signal from the first moment, wherein the first moment and the termination of the subframe where the first moment is located The time interval between the times is less than a threshold; or the base station sends one or a combination of the control channel and the data channel from the first time, wherein the first time and the end time of the subframe where the first time is located The time interval between them is not less than the threshold.

With reference to the seventh possible implementation manner of the first aspect, and any one of the possible implementation manners of the eighth possible implementation manner, in the ninth possible implementation manner, the reference signal is a non-periodic reference signal. The time-frequency resource of the aperiodic reference signal in the subframe is pre-configured or temporarily notified; or the reference signal is a periodic reference signal, the period of the periodic reference signal and the periodic reference signal in the subframe Time-frequency resources are pre-configured.

With reference to the first aspect, or any one of the first to the ninth possible implementation manners of the first aspect, in the tenth possible implementation manner, the indication message further includes a length of time that the base station continuously uses the channel And/or channel switching information.

In a second aspect, an embodiment of the present invention provides a method for receiving a signal, including:

The user equipment of the U-LTE system receives and buffers the signal on the unlicensed spectrum channel, where the received and buffered signal includes the first signal sent by the base station, starting from the first moment in the time window, the first The signal includes one or a combination of a control channel, a data channel, and a reference signal;

Receiving, by the user equipment, an indication message at a second moment after the time window is cut off; wherein the indication message carries information that includes the first signal in a signal received and buffered in the time window;

The user equipment detects the first signal according to the indication message.

In a first possible implementation of the second aspect, there is a time interval between the cutoff time of the time window and the second time.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation manner, the time window includes a time length that is less than a time length of one subframe; or the time included in the time window The length is equal to the length of time of one subframe.

With reference to the second aspect, or any one of the first to the second possible implementation manners of the second aspect, in a third possible implementation manner, the time window includes each part of time resources in two consecutive subframes.

With reference to the second aspect, or any one of the first to third possible implementation manners of the second aspect, in the fourth possible implementation, the second moment includes a predefined moment.

With reference to the second aspect, or any one of the first to fourth possible implementation manners of the second aspect, in a fifth possible implementation, the second time instant includes: a start time of a subframe; or the second time includes a corresponding time of the N symbols before the end time of the subframe where the time window is cut off, where the N symbols are not smaller than the indication message occupation The number of symbols.

With reference to the second aspect, or any one of the first to fifth possible implementation manners of the second aspect, in the sixth possible implementation, the indication message is transmitted on a channel of the licensed spectrum; or The indication message is transmitted on a channel of the unlicensed spectrum.

With reference to the second aspect, or any one of the first to sixth possible implementation manners of the second aspect, in a seventh possible implementation, the signal that the user equipment receives and caches further includes, from the time window The signal between the cutoff time and the time when the indication message is detected.

With reference to the second aspect, or any one of the first to seventh possible implementation manners of the second aspect, in the eighth possible implementation, the indication message is carried in a signal received and buffered in the time window. The information including the first signal includes: the first signal includes one or a combination of a data channel, a control channel, and the indication message carries a first time from the time window, and receives in the time window The information of the first signal is included in the buffered signal.

With reference to the eighth possible implementation manner of the second aspect, in a ninth possible implementation, the user equipment, according to the indication message, detecting the first signal, includes: the user equipment according to the indication message Determining the first moment; the user equipment decoding the first signal according to the first moment.

With reference to the second aspect, or any one of the first to seventh possible implementation manners of the second aspect, in the tenth possible implementation manner, the indication message is carried in a signal received and buffered in the time window. The information including the first signal includes: the first signal includes a reference signal, and the indication message carries a signal received and buffered in the time window from a first moment of the time window Information of the first signal; or the first signal includes a reference signal carrying information including the first signal in a signal received and buffered within the time window.

With reference to the tenth possible implementation manner of the second aspect, in the eleventh possible implementation manner, the user equipment detects the reference signal according to the information of the first moment carried in the indication message; or The user equipment detects the reference signal according to the indication message.

With reference to the second aspect, or any one of the first to seventh possible implementation manners of the second aspect, in the twelfth possible implementation manner, the indication message is carried from a first moment of the time window, The signal received and buffered within the time window includes information of the first signal; Determining, according to the indication message, that the first signal includes a reference signal, where a time interval between a first moment indicated by the indication message and a termination time of a subframe where the first moment is located is less than a threshold. Or the user equipment determines, according to the indication message, that the first signal includes one or a combination of a data channel and a control channel, where the first moment indicated by the indication message and the first moment are located The time interval between the end times of the frames is not less than the threshold.

With reference to the second aspect, or any one of the first to seventh and the tenth to twelfth possible implementation manners, in the thirteenth possible implementation manner, the reference signal is aperiodic a reference signal, the time-frequency resource of the aperiodic reference signal in the subframe is pre-configured or temporarily notified; or the reference signal is a periodic reference signal, the period of the periodic reference signal and the periodic reference signal are The time-frequency resources in the subframe are pre-configured.

With reference to the second aspect, or any one of the first to the thirteenth possible implementation manners of the second aspect, in the fourteenth possible implementation manner, the indication message further includes a time when the channel continuously receives signals Information on length and/or channel switching.

In a third aspect, an embodiment of the present invention provides an apparatus for transmitting a signal, including a transceiver and a processor, where: the processor is configured to acquire an unlicensed spectrum in a time window with the assistance of the transceiver. Right to use the channel;

The transceiver is configured to: after acquiring the usage right of the channel, send a first signal on the channel at a first moment in the time window; wherein the first signal includes at least one of the following: Control channel, data channel, reference signal;

The transceiver is further configured to send an indication message at a second moment;

Wherein the second moment is not earlier than the time window deadline;

The indication message includes an indication that the device transmitting the signal transmits the first signal within the time window.

In a first possible implementation of the third aspect, there is a time interval between the cutoff time of the time window and the second time.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation manner, the time window includes a time length that is less than a time length of one subframe; or the time included in the time window The length is equal to the length of time of one subframe.

With reference to the third aspect, or any one of the possible implementation manners of the first to the second aspect of the third aspect, in a third possible implementation manner, the time window includes each part of time resources in two consecutive subframes.

With reference to the third aspect, or any one of the first to the third possible implementation manners of the third aspect, in the fourth possible implementation manner, the second moment is located at a preset moment of the subframe.

With reference to the third aspect, or any one of the first to fourth possible implementation manners of the third aspect, in a fifth possible implementation, the second moment includes a sub-frame in which the time window is cut off a start time of a subframe; or the second time includes a time corresponding to the N times of the end time of the subframe where the time window is cut off, where the N symbols are not smaller than the occupied by the indication message. The number of symbols.

With reference to the third aspect, or any one of the first to fifth possible implementation manners of the third aspect, in the sixth possible implementation, the indication message is transmitted on a channel of the licensed spectrum; or the indication message Transmission on the channel of the unlicensed spectrum.

With reference to the third aspect, or any one of the first to the sixth possible implementation manners of the third aspect, in the seventh possible implementation, the first signal includes one of a control channel, a data channel, and a reference signal, or Combining, the indication message indicating that the device transmitting the signal transmits the first signal at the first moment in the time window; or the first signal comprises a reference signal, the indication message indicating the sending The means of the signal transmits the first signal within the time window.

With reference to the third aspect, or any one of the first to seventh possible implementation manners of the third aspect, in an eighth possible implementation, after acquiring the usage right of the channel, the transceiver is in the Transmitting the first signal on the channel at a first time in the time window comprises: the transceiver transmitting a reference signal from the first time, wherein the first time and the first time are in a subframe The time interval between the termination times is less than a threshold; or the transceiver is from the first time And starting to send one of the control channel, the data channel, or a combination, wherein a time interval between the first moment and a termination time of the subframe where the first moment is located is not less than the threshold.

With reference to the seventh possible implementation manner of the third aspect, and any one of the possible implementation manners of the eighth possible implementation manner, in the ninth possible implementation manner, the reference signal is a non-periodic reference signal, The time-frequency resource of the aperiodic reference signal is pre-configured or temporarily notified; or the reference signal is a periodic reference signal, the period of the periodic reference signal and the time-frequency of the periodic signal in the subframe Resources are pre-configured.

With reference to the third aspect, or any one of the first to the ninth possible implementation manners of the third aspect, in the tenth possible implementation manner, the indication message further includes a length of time that the base station continuously uses the channel And/or channel switching information.

In a fourth aspect, an embodiment of the present invention provides an apparatus for receiving a signal, including a processor, a transceiver, and a buffer, where:

The transceiver is configured to receive a signal on an unlicensed spectrum channel;

The buffer is configured to buffer a signal on an unlicensed spectrum channel received by the transceiver, where the received and buffered signal includes a first signal sent by a base station, starting from a first time in a time window, where A signal includes one or a combination of a control channel, a data channel, and a reference signal;

The transceiver receives an indication message at a second moment after the time window deadline; wherein the indication message carries information including the first signal in a signal received and buffered in the time window;

The processor is configured to detect the first signal according to the indication message.

In a first possible implementation manner of the fourth aspect, a time interval exists between a cutoff time of the time window and the second time.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the time window includes a time length that is less than a time length of one subframe; or

The time window includes a length of time equal to the length of time of one subframe.

With reference to the fourth aspect, or any one of the possible implementation manners of the first to the second aspect of the fourth aspect, in a third possible implementation manner, the time window includes each part of time resources in two consecutive subframes.

With reference to the fourth aspect, or any one of the first to the third possible implementation manners of the fourth aspect, in the fourth possible implementation manner, the second moment includes a predefined moment.

With reference to the fourth aspect, or any one of the first to fourth possible implementation manners of the fourth aspect, in a fifth possible implementation, the second time includes a subframe that includes the time window of the time window a start time of the next subframe; or the second time includes a corresponding time of the N symbols before the end time of the subframe where the time window is cut off, where the N symbols are not smaller than the indication message The number of symbols occupied.

With reference to the fourth aspect, or any one of the first to fifth possible implementation manners of the fourth aspect, in the sixth possible implementation, the indication message is transmitted on a channel of the licensed spectrum; or the indication message Transmission on the channel of the unlicensed spectrum.

With reference to the fourth aspect, or any one of the first to the sixth possible implementation manners of the fourth aspect, in a seventh possible implementation, the signal that is received by the transceiver and buffered by the buffer further includes A signal from a cut-off time of the time window to a time at which the indication message is detected.

With reference to the fourth aspect, or any one of the first to seventh possible implementation manners of the fourth aspect, in an eighth possible implementation manner, the indication message is carried in a signal received and buffered in the time window. The information including the first signal includes:

The first signal includes one or a combination of a data channel and a control channel, the indication message carrying a first signal from a first time of the time window, and the signal received and buffered in the time window includes the first signal Information.

With reference to the eighth possible implementation manner of the fourth aspect, in a ninth possible implementation, the determining, by the processor, the first signal according to the indication message includes:

The processor is configured to determine the first moment according to the indication message;

The processor is further configured to decode the first signal according to the first moment.

With reference to the fourth aspect, or any one of the first to seventh possible implementation manners of the fourth aspect, in the tenth possible implementation manner, the indication message is carried in a signal received and buffered in the time window. The information including the first signal includes: the first signal includes a reference signal, and the indication message carries a signal received and buffered in the time window from a first moment of the time window Information of the first signal; or the first signal includes a reference signal carrying information including the first signal in a signal received and buffered within the time window.

With reference to the tenth possible implementation manner of the fourth aspect, in an eleventh possible implementation manner, the processor is configured to detect the reference signal according to the information of the first moment carried in the indication message; or The processor detects the reference signal according to the indication message.

With reference to the fourth aspect, or any one of the first to seventh possible implementation manners of the fourth aspect, in the twelfth possible implementation manner, the indication message carries a first moment from the time window, The signal received and buffered within the time window includes information of the first signal;

The processor is configured to determine, according to the indication message, that the first signal includes a reference signal, where a time interval between a first moment indicated by the indication message and a termination time of a subframe where the first moment is located is less than a threshold, or the processor determines, according to the indication message, that the first signal includes one or a combination of a data channel and a control channel, where the first moment indicated by the indication message and the first moment are The time interval between the end times of the subframes is not less than the threshold.

With reference to the fourth aspect, or any one of the first to seventh and the tenth to the eleventh possible implementation manners, in the thirteenth possible implementation manner, the reference signal is aperiodic a reference signal, the time-frequency resource of the aperiodic reference signal in the subframe is pre-configured or temporarily notified; or the reference signal is a periodic reference signal, the period of the periodic reference signal and the periodic reference signal are The time-frequency resources in the subframe are pre-configured.

With reference to the fourth aspect, or any one of the first to the thirteenth possible implementation manners of the fourth aspect, In a fourteenth possible implementation manner, the indication message further includes information about a length of time and/or channel switching of continuously receiving signals on the channel.

According to the method provided by the embodiment of the present invention, after acquiring the usage right of the channel of the unlicensed spectrum, the base station may send the first signal including but not limited to one of the control channel, the data channel, the reference signal or the combination as soon as possible, thereby avoiding sending the padding signal. The resulting resource is wasted, thereby improving the utilization of resources; the user terminal can correctly demodulate or decode the received signal according to the indication message without increasing the computational complexity.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the prior art or the embodiments will be briefly described below. Obviously, the drawings in the following description are only some implementations of the present invention. For example, other drawings may be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a timing diagram showing a method of transmitting a signal in the prior art;

FIG. 2 is a flowchart of a method for transmitting a signal according to an embodiment of the present invention;

FIG. 3 is a schematic diagram showing timing of time window division according to an embodiment of the present invention; FIG.

FIG. 4 is a schematic diagram showing timing of time window division according to an embodiment of the present invention; FIG.

FIG. 5 is a schematic diagram showing timing of time window division according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic diagram showing a time window division timing according to an embodiment of the present invention; FIG.

FIG. 7 is a timing diagram showing a transmission signal according to an embodiment of the present invention;

FIG. 8 is a timing diagram showing a transmission signal according to an embodiment of the present invention;

FIG. 9 is a timing diagram showing a transmission signal according to an embodiment of the present invention;

FIG. 10 is a flowchart of a method for transmitting a signal according to an embodiment of the present invention;

FIG. 11 is a flowchart of a method for receiving a signal according to an embodiment of the present invention;

FIG. 12 is a flowchart of a method for communication according to an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of an apparatus for transmitting a signal according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of an apparatus for receiving a signal according to an embodiment of the present invention.

detailed description

The technical solutions of 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, and not all embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

Long Term Evolution (LTE) system is based on Orthogonal Frequency Division Multiplexing Access (OFDMA) technology. Time-frequency resources are divided into OFDM symbols and frequencies in the time domain dimension. The OFDM subcarrier on the domain dimension, and the smallest resource granularity is called a resource element (English Resource Element, abbreviated as RE), that is, an OFDM symbol in the time domain and a time-frequency grid point of one OFDM subcarrier on the frequency domain.

The transmission of services in the LTE system is based on base station scheduling. The basic time unit of scheduling is one subframe, and the length of time is generally 1 millisecond. For the normal cyclic prefix case, one subframe includes 14 OFDM symbols; for the extended cyclic prefix case, one subframe includes 12 OFDM symbols.

There is a fixed frame structure in the LTE system, and the boundary of the frame or the boundary of the subframe is fixed in time. In other words, the frame boundary or the subframe boundary of the LTE system corresponds in time to the determined time. The frame or subframe boundary includes the start time and the end time of the frame or the subframe. Generally, the boundary of the frame or the subframe is both the end time of one subframe and the start time of the next subframe. Such a fixed frame boundary or a subframe boundary has the following advantages: the synchronization complexity of the receiving end and the transmitting end is reduced; the neighboring cell can perform interference coordination by time synchronization, especially for the time division multiplexing system: performing unauthorized When the carrier aggregation of the carrier and the authorized carrier is performed, the time synchronization between the unlicensed carrier and the authorized carrier can be ensured, and the uplink feedback channel can be transmitted on the authorized carrier, which reduces the transmission delay of the feedback channel.

Generally, the scheduling process of the resources in the LTE system includes the following steps: the base station sends a control channel, where the control channel can carry scheduling information, where the scheduling information includes, for example, resource allocation information, adjusting coding mode and other control information; User Equipment, abbreviation: UE) and After the time-frequency synchronization of the base station, the control channel is detected according to the subframe boundary, that is, at the start time of each subframe, and the downlink data channel is received or the uplink data channel is transmitted according to the detected scheduling information carried in the control channel.

The spectrum deployed in the existing LTE system is the licensed spectrum, that is, it can only be used by the carrier network that purchased the licensed spectrum. Due to the shortage of licensed spectrum resources and high prices, at the same time, unlicensed spectrum does not need to be paid, and as long as certain rules are met, people's attention to unlicensed spectrum is increasing. An LTE system deployed in an unlicensed spectrum is called a U-LTE system.

Considering the U-LTE system of multiple operators and the coexistence requirements with other wireless communication systems utilizing unlicensed spectrum, U-LTE systems need to consider application competition rules in design; communication due to U-LTE systems When a device competes for unlicensed spectrum resources, its competing objects include not only communication devices of other U-LTE systems that also have predictable subframe boundaries, but also random access capabilities represented by Wi-Fi communication devices. Other communication devices. Since some communication devices occupy a wireless channel of an unlicensed spectrum at a random time based on a method similar to Listening-Before-Talk (LBT), then for the communication device of the U-LTE system, It is desirable to have the ability to occupy unlicensed spectrum channels at random times.

FIG. 1 shows a timing diagram of a communication device of a U-LTE system competing for unlicensed spectrum resources. Time t ₁ in FIG particular time channel into a busy idle, one possible case, Wi-Fi communications device transmission signal system is completed at time t ₁ and releasing the channel; the U-LTE communication device system in a reasonable time t ₂ of competition, won the right to confirm that the channel is, in general, not time t _2, the sub-frame boundary with the U-LTE system alignment time t _3, so In order to prevent the channel from being occupied by other communication devices during t ₂ to t ₃ , the communication device of the U-LTE system will start transmitting the padding signal from time t ₂ until the effective signal is transmitted at time t ₃ . Obviously, this approach will result in wasted resources.

The root cause can be found that the communication device of the U-LTE system cannot immediately transmit the valid signal including the control channel, the data channel or the reference signal after acquiring the use right of the channel of the unlicensed spectrum, because the communication device acquires the non- The time at which the right to use the channel of the licensed spectrum is random Often, it cannot be aligned with its sub-frame boundary; if the effective signal including the control channel, the data channel or the reference signal is directly transmitted, the corresponding communication device cannot know the received signal without a priori information when receiving. The starting moment of the effective signal, and therefore it is difficult to decode correctly; on the other hand, considering the complexity of the data format of the U-LTE system and the computational complexity of the communication device at the time of reception, blind detection is not a feasible solution. .

In summary, the waste of the communication device of the U-LTE system when using the unlicensed spectrum resource is a problem existing in the prior art; therefore, the present invention aims to provide a method, device and system for transmitting or receiving a signal, To obtain unlicensed spectrum resources obtained with high efficiency in the current unlicensed spectrum application environment.

The technical solutions of the present invention will be described in detail below in conjunction with specific embodiments. It is to be noted that the base stations mentioned in the various embodiments of the present invention include, but are not limited to, a base station, a macro base station, a micro base station, and a pico base station that support unlicensed spectrum. The user equipment included in each embodiment of the present invention includes However, it is not limited to terminal devices that indicate unlicensed spectrum.

Further, although the transmitting device performing the transmitting method in the embodiment of the present invention considers it to be a base station, and the receiving device performing the receiving method is a user terminal, in a specific implementation process, a specific transmitting or receiving communication device may be performed. The same as the base station or the same as the user terminal: for example, between user equipments in the field of the Internet of Vehicles, the method according to the embodiment of the invention implements communication on the channel of the unlicensed spectrum. Similar scenarios should also fall within the scope of the present invention.

Example 1

The embodiment of the present invention provides a method for transmitting a signal, where a base station of a U-LTE system sends a first signal at a first moment after acquiring a usage right of a channel of an unlicensed spectrum; the base station after the first moment Transmitting, by the second time, an indication message, wherein the indication message includes an indication that the base station sends the first signal; wherein the first signal is consistent with a concept of a valid signal of a background technology portion, the first signal includes It is not limited to one or a combination of a control channel, a data channel, or a reference signal.

According to the method provided by the embodiment of the present invention, after acquiring the usage right of the channel of the unlicensed spectrum, the base station may send the first signal including but not limited to one of the control channel, the data channel, the reference signal, or a combination, as soon as possible, to avoid sending. The resource caused by the padding signal is wasted, thereby improving the utilization of resources; at the same time, the user terminal can correctly demodulate or decode the received signal according to the indication message without increasing the computational complexity.

FIG. 2 shows a method for transmitting a signal according to an embodiment of the present invention. The method includes the following steps:

Step 201: The base station of the U-LTE system acquires the usage right of the channel on the unlicensed spectrum in a time window;

Step 202: After acquiring the usage right of the channel, the base station starts transmitting a first signal on the channel at a first moment in the time window.

Step 203: The base station sends an indication message at a second moment.

The first signal includes at least one of the following: a control channel, a data channel, and a reference signal;

Wherein the second moment is not earlier than a deadline of the time window;

The indication message includes an indication that the base station sends the first signal in the time window; or, so that the user equipment starts to send according to the indication information at a first moment in the time window. The first signal is detected or decoded.

In a specific implementation process, the base station is a base station of a U-LTE system, and supports communication using a channel of an unlicensed spectrum. The U-LTE system has a fixed frame boundary or a subframe boundary. Specifically, the start time and/or the end time of each frame or subframe of the U-LTE system correspond to a certain and predictable time. For example, a U-LTE system has a subframe length of 1 millisecond, and a start time of one subframe coincides with a termination time of a previous subframe. Then, after determining a frame or subframe boundary in time, U- Past and future frame or subframe boundaries of the LTE system can also be determined.

In a specific implementation step 201, the base station may acquire the usage rights of the channel of the unlicensed spectrum by using different methods or according to different criteria, for example, the base station reference The LBT principle, the method of applying the idle channel assessment, contends for the use rights of the channel on the channel of the unlicensed spectrum. The channel usage right includes the right of the base station to transmit a signal on the channel.

In a specific implementation step 201, step 202 or step 203, the time window corresponds to a certain length of time determined in one subframe or multiple subframes, or a start time and a termination time of a time window are used for a subframe boundary. It is relatively fixed. Optionally, the time window may be a continuous period of resources, such as consecutive OFDM symbols; or may be non-contiguous time resources, each segment including consecutive OFDM symbols. The specific form of the time window can be predefined or configured by the base station.

Figures 3, 4, 5, and 6 each illustrate an alternative method of setting a time window:

Optionally, the time length covered by the time window is less than the length of time of one subframe. For example, as shown in FIG. 3, n symbols are included in one subframe, and each symbol takes a period of time, where n is an integer greater than 1. As shown in FIG. 3, each symbol is sequentially numbered as s ₁ , s ₂ ... s _n from the sub-frame boundary, and the time range corresponding to time window 1 or time window 2 or time window 3 is as shown by the dotted line in FIG. 3 . Shown includes s ₁ , s ₂ ... s _k , where k is a positive integer not greater than n.

Optionally, the time length covered by the time window is equal to the length of time of one subframe. For example, as shown in FIG. 4, n symbols are included in one subframe, and each symbol takes a period of time, where n is an integer greater than 1. As shown in FIG. 4, each symbol is sequentially numbered as s ₁ , s ₂ ... s _n from the sub-frame boundary, and the time range corresponding to time window 1 or time window 2 is as shown by the dashed box in FIG. 4 , including s ₁ , s ₂ ... s _n .

Optionally, the time window covers the time length that is greater than the length of time of one subframe. For example, as shown in FIG. 5 and FIG. 6, one subframe includes n symbols, and each symbol takes a period of time, where n is an integer greater than 1, and each symbol is sequentially numbered as s ₁ from the subframe boundary. s ₂ ...s _n . The time window may include more than n symbols, that is, a time window covers a time length of more than one subframe. For example, as shown in FIG. 5, the time range corresponding to the time window 1 is as shown by the dotted line in FIG. s ₁ s s _n of the first subframe and s ₁ s s _k of the second subframe, wherein the second subframe is the next subframe adjacent to the first subframe; the time window 2 corresponds The time range includes s ₁ ... s _n of the second subframe and s ₁ ... s _k of the third subframe, wherein the third subframe is the next subframe adjacent to the second subframe, where k is positive Integer. For another example, as shown in FIG. 6, the time range corresponding to the time window 1 is as shown by the dashed box in FIG. 6, including s _k ... s _n of the first subframe and s ₁ ... s _{m of the} second subframe, wherein The second subframe is a next subframe adjacent to the first subframe; the time range corresponding to the time window 2 includes s _k ... s _n of the second subframe and s ₁ ... s _{m of the} third subframe, The third subframe is a next subframe adjacent to the second subframe, where k and m are positive integers. Only the time modes of the four optional time windows are listed above. In a specific implementation process, a person skilled in the art can set time windows of different lengths and corresponding parts of different subframes according to specific requirements, and the time window of the present invention The specific setting method is not limited.

In a specific implementation process, since the subframes occur periodically in time, the time window may also appear periodically. Taking the time window timing diagram shown in FIG. 3 as an example, each subframe corresponds to one time window, and the corresponding multiple subframes correspond to multiple time windows.

In a specific implementation process, optionally, the time window includes each part of time resources in two consecutive subframes. For example, as shown in FIG. 5 and FIG. 6, a time window includes a part of symbols in two adjacent subframes. Specifically, the subframe in which the start time of the time window is located, and the subframe in which the deadline of the time window is located may not be one subframe, and the time window may include a time length less than, equal to, or greater than one subframe. Length of time.

In a specific implementation process, optionally, adjacent time windows include overlapping time. For example, as shown in FIGS. 5 and 6, the time window 1 and the time window 2 have overlapping overlap times. In a specific implementation process, for the time of the same overlapping coverage, at least two indication messages may be used to indicate the time of the overlapping coverage, so the scheduling flexibility may be increased. That is, if the base station transmits the first signal within the overlapping coverage time formed by the at least two time windows, at least two indication messages may be used for indication, thereby increasing scheduling flexibility.

In a specific implementation step 202, after determining, by using the time window, that the channel usage right on the unlicensed spectrum is acquired, the base station starts to send the first signal from the first moment. Wherein the first The time is not later than the start time of the next symbol at the time when the base station acquires the usage right of the channel. The time relationship between the time when the channel usage right on the unlicensed spectrum is obtained and the first time when the first signal is sent is included in the embodiment of the present invention, including two extreme cases: specifically, on the one hand, the technology in the field Personnel should know that when the base station determines to obtain the right to use the channel, even if the first signal is sent immediately, the base station may consume the certain time, for example, the processing instruction time, during the scheduling process, which may cause the start to send the first The first moment of a signal must lag behind the moment at which the right to use the channel is determined. In this case, the time at which the right to use the channel on the unlicensed spectrum is obtained within the time window is determined to be ahead of the first time; that is, under the premise of ignoring the processing time, the two can also be considered The time is the same time, that is, the time when the base station determines to acquire the channel usage right on the unlicensed spectrum in the time window is the first time, and the first signal is sent from the first time.

On the other hand, if the base station determines that the time at which the usage right is acquired does not coincide with the start time of the symbol in the subframe, the base station may select the start time of the next symbol at the time of acquiring the usage right as the first At the moment, the first signal is sent from the first moment. Optionally, the base station sends a padding signal to prevent the channel from being preempted by other communication devices during a time interval between the first time and the time when the usage right is acquired. The base station does not transmit signals, and the method is advantageous for saving power consumption, and also considers that the time length of one symbol is relatively small, and the probability that the channel is preempted by other communication devices in a small period of time is low.

In a specific implementation step 202, the selection of the first moment may be the above two extreme values, or may be any of the above two extreme value delimiting intervals. Optionally, the first moment is specifically a starting moment of a symbol in the time window. In a specific implementation process, the time when the base station acquires the use right of the channel of the unlicensed spectrum in the time window may not coincide with the start time of any symbol in the time window, but in order to facilitate the time and the present Some symbols are consistent, and are also convenient for the user terminal to decode or detect the received signal, and the base station may select the start time of the symbol in the time window as the first time; preferably, the base station selects at the time Within the window, the start time of the closest symbol after the time at which the usage right is acquired, As a first moment, this further improves the utilization of resources. Optionally, the base station sends a padding signal to prevent the channel from being preempted by other communication devices during a time interval between the first time and the time when the usage right is acquired. Optionally, The base station does not transmit signals, and the method is advantageous in saving power consumption, and also considers that the time length of one symbol is relatively small, and the probability that the channel is preempted by other communication devices in a small period of time is low.

In the process of the specific implementation step 202, the first signal is different from the padding signal in the prior art. Specifically, the first signal mentioned in the embodiment of the present invention has the function of occupying a channel. , also carries information. For example, the first signal includes, but is not limited to, one or a combination of a control channel, a data channel, or a reference signal.

In a specific implementation step 202, optionally, the base station sends a reference signal from the first moment, where the first moment is between the end time of the subframe in which the first moment is located. The time interval is less than a threshold; or the base station sends a control channel and/or a data channel from the first moment, where the length of time between the first moment and the end time of the subframe in which the first moment is located is not Less than the threshold. Specifically, the threshold may be a number of symbols. For example, if the threshold is set to 6 symbols, when the time interval between the first time and the termination boundary of the subframe is less than 6 symbols, the first time A signal is specifically a reference signal; otherwise, the first signal is specifically one or a combination of a data channel or a control channel.

In a specific implementation step 203, the base station sends an indication message at a second moment after the first moment, where the indication message includes an indication that the base station sends the first signal; in a specific implementation process, The user equipment of the U-LTE system in which the base station performs communication may detect the signal received and buffered in advance according to the indication message. The indication message enables the user equipment to decode or detect the first signal without increasing the computational complexity, thereby avoiding the computational complexity or power consumption brought about by the introduction of blind detection. In this and other embodiments of the invention, the detecting includes detecting the reference signal to perform tasks such as channel estimation, time-frequency synchronization, radio resource management measurements, etc.; the detecting also includes decoding the data channel or the control channel.

In a specific implementation process, the indication message in step 203 corresponds to step 201 and step 202. Time window in. From another perspective, the time window is the time range corresponding to the indication message; the time window includes a time range indicating the indication of the message. For example, if the time window includes 8 symbols, the indication message may be 3 bits to specifically indicate which of the 8 symbols is the first moment.

In a specific implementation process, the second moment is not earlier than the deadline of the time window. That is, the second time at which the base station transmits the indication message overlaps with the cut-off time of the time window or lags behind the cut-off time of the corresponding time window. It should be noted that, as can be seen from FIG. 3 to FIG. 6 , the time window and the indication message are periodically generated, and the time window has a corresponding relationship with the indication message, so the second time that the base station sends the indication message is not earlier than The cut-off time of the time window specifically refers to the time relationship between the time window and the second time of transmitting the corresponding indication message.

In a specific implementation process, optionally, the second moment is a preset moment, and the user equipment may receive the indication message at the preset second moment, thereby further reducing the calculation amount or power consumption of the user terminal. Optionally, the second moment is a moment that the base station is configured to the user equipment.

In a specific implementation process, optionally, the second moment includes a start time of a next subframe of a subframe in which the deadline of the time window is located, that is, the indication message is located at a deadline of the time window. The starting position of the sub-frame after the sub-frame. Specifically, if the cutoff time of the time window coincides with the cutoff time of the subframe, the second time may coincide with the cutoff time, and the second time may also be located one subframe away from the cutoff time. The time of the length of time. Optionally, the second time includes a time corresponding to the N times of the cutoff time of the subframe where the time window is cut off, where the N symbols are not smaller than the number of symbols occupied by the indication message, preferably And indicating that the message occupies the last N symbols of the subframe in which the deadline of the time window is located, and N may be 1, 2, or 3. Optionally, the second moment may also be located at one or more preset moments in the subframe in which the time window is cut off, such as a starting point of one or more symbols, so that the location of the first moment can be known as soon as possible. . Specifically, for example, the first time when the first signal is sent is the third symbol of the subframe, and the second time when the indication message is sent may be the fifth symbol of the subframe, where the indication message is The second moment can be tied to the first moment with a preset For example, if the user equipment receives the indication message, for example, the indication message is a known sequence, the user equipment can determine the position of the first two symbols. For the first moment. It can be seen that the time window at this time is backed up to a symbol, which is specifically indicated by an indication message sent later, and the indication message may be a sequence or an indication bit carried in the control channel.

In a specific implementation step 203, optionally, the indication message is transmitted on a channel of the licensed spectrum. In a specific implementation process, since the channel resources of the licensed spectrum are scheduled by the base station, generally, the channel quality of the licensed spectrum is better, which is advantageous for reliable transmission of signals, so that transmitting the indication message on the channel of the licensed spectrum is advantageous. The quality of the indication message is guaranteed; optionally, the indication message is transmitted on the channel of the unlicensed spectrum.

In a specific implementation step 203, optionally, the first signal includes one or a combination of a control channel and a data channel, where the indication message indicates that the base station sends the first signal at the first moment; The user terminal buffers the signal in advance, and then determines the first time according to the indication message, and further determines a start sending time of the first signal in the pre-cached signal, so that the user equipment subsequently detects the cache according to the initial sending time. Down control channel and / or data channel. For example, the time window includes 8 time units, each time unit corresponds to the time occupied by one symbol; the indication message includes 3 bits, and the 3 bits can be used to distinguish the base station in 8 time units. Any one of the time units begins transmitting the first signal.

In a specific implementation step 203, optionally, the first signal includes a reference signal, where the indication message indicates that the base station sends a first signal at the first moment, and the corresponding user terminal is configured according to the indication message. Determining a starting transmission time of the reference signal in the buffered signal, so that the user equipment subsequently detects the buffered reference signal according to the initial transmission time, and performs, for example, channel estimation, time-frequency synchronization, and wireless according to the reference signal. Tasks such as resource management measurements.

In a specific implementation step 203, optionally, the first signal includes a reference signal, where the indication message indicates that the base station sends the first signal in the time window. Corresponding user terminal determines, according to the indication message, that a reference signal exists in the buffered signal, and is in the A reference signal is detected in the stored signal, and tasks such as channel estimation, time-frequency synchronization, and radio resource management measurement are performed according to the reference signal.

Optionally, the time window corresponding to the control channel and the data channel and the time window corresponding to the reference signal may be independent, that is, the two may completely overlap, partially overlap or even not overlap. The time window for the control channel and the data channel may include the first N symbols of one subframe, such as N is 5, 6, or 7; and the time window for the reference signal may include the last N symbols of one subframe, such as N 5, 6 or 7. Specifically, taking the control channel as the PDCCH as an example, and the reference signal is a CSI-RS as an example, if the indication information is sent in the subframe 2 to indicate the start symbol of the PDCCH and the CSI-RS in the subframe 1, the indication corresponding to the PDCCH The range (ie, the time window corresponding to the control channel) is the first symbol to the fifth symbol of the subframe 1; the indication range corresponding to the CSI-RS (ie, the time window corresponding to the reference signal) is the sixth of the subframe 1, 7 symbols and 9th, 10th, 12th and 13th symbols; it can be seen that the two time windows do not overlap, and the reference signal has a time window corresponding to the reference signal because the time-frequency resources in one subframe are preset. The included symbols can be discontinuous. Other situations, such as partial overlap, are similar.

Optionally, the reference signal is a periodically transmitted reference signal, and the reference signal may be a non-zero power CSI-RS for channel measurement and/or a zero-power CSI-RS, CRS or other period for interference measurement. The period of the reference signal and the time-frequency resource of the reference signal in the subframe are pre-configured; the indication message is used to indicate that the user equipment detects or does not detect the periodic transmission timing. Reference signal. Specifically, considering that the channel usage right of the unlicensed spectrum requires the base station to perform preemptive preemption according to a certain rule, the base station cannot guarantee that the channel usage right can be used at each preset timing of transmitting the reference signal, if the user equipment still According to the signal corresponding to the time-frequency resource of each preset value, the measurement, synchronization, channel estimation, etc. may cause errors due to the absence of the reference signal. The solution is that the user equipment determines, according to the indication message, whether the signal corresponding to the corresponding time-frequency resource includes the reference signal, if the indication message is not received, or the information of the indication message indicates that the base station is at a corresponding predetermined time frequency. If the resource location does not send the reference signal, it is considered that the received and buffered signal does not include the reference signal, and if the user equipment receives When the indication message is sent, or the indication message indicates that the base station sends the reference signal at a corresponding predetermined time-frequency resource location, the user equipment performs, for example, channel estimation, time-frequency synchronization, and radio resource management according to the received and buffered signal. Measurement and other tasks. Optionally, the user equipment discards the use of the reference signal of the sending occasion according to the indication message, that is, if the user equipment does not receive the indication message, the reference signal of the sending timing is used. This ensures that the reference signal is used corresponding to the actual transmission of the reference signal without any use error.

Optionally, the reference signal is a non-periodic transmitted reference signal, and the time-frequency resource of the aperiodic reference signal in the subframe is pre-configured or temporarily notified. Specifically, considering that the channel usage right of the unlicensed spectrum requires the base station to perform preemptive preemption according to a certain rule, the base station cannot guarantee that the channel usage right can be used at each preset timing of transmitting the reference signal, if the user equipment still According to the signal corresponding to the time-frequency resource of each preset value, the measurement, synchronization, channel estimation, etc. may cause an error due to the absence of the reference signal. In a specific implementation process, the non-periodic reference signal may be indicated by the indication message. For the transmission, the time-frequency resource of the aperiodic reference signal may be temporarily allocated, or may be pre-configured, or may be based on the periodic reference signal to perform some time domain delay, and in one subframe. The time-frequency resource in the same is the same as the pre-configured periodic reference signal, or the reference signal temporarily triggered may temporarily send one or more subframes. This scheme can be used in parallel with the scheme of the periodic reference signal described above.

Optionally, the sending of the foregoing control channel and/or the data channel needs to perform rate matching on the aperiodic reference signal indicated by the indication message. Specifically, the user equipment in the active state can be understood to be in an active state on the unlicensed carrier of the user equipment, and the indication message sent is a group. Broadcast or broadcast, such as the indication message is carried in a control channel visible to a group or all active user equipment, the control channel can be scrambled with a common scrambling code. Then, the time-frequency resource of the aperiodic reference signal indicated by the indication message is known to a group of user equipments or all active user equipments. In this case, if an active state user equipment needs to receive the unicast control channel and / or data channel, you need to bypass the time-frequency resources of the reference signal indicated by the above indication message.

In a specific implementation step 203, optionally, there is a time interval between the cutoff time of the time window and the second time. The time interval may be preset or may be configured by the base station to the user equipment. Optionally, the time interval is used to meet a time required by the base station to start acquiring the channel usage right to generate a control channel that includes the indication message: considering a specific implementation process, channel resources on the unlicensed spectrum The occupancy is based on the instantaneous channel idle evaluation, that is, the channel usage right cannot be determined in advance, and it is assumed that the base station starts transmitting the first signal as the first moment, that is, the base station is at the deadline. Only when the right to use the channel is preempted, the base station can determine the information carried by the indication message at the time limit of the time window, for example, the specific time when the base station sends the first signal or whether the base station sends the first signal, thereby affecting To the content of the indication message, in this case, a time interval may be included between the deadline of the time window and the second time of transmitting the indication message to satisfy the time required for the base station to form the indication message.

Optionally, the time interval includes a symbol that is backward of the subframe. That is, the time window occupies the first few symbols of a subframe, that is, the latter symbols of the subframe are not within the time window as the time interval, as the symbol s _{k+1 in} FIG. 3 ... ...s _n . Optionally, in a specific implementation process, even if the base station acquires the usage right of the channel of the unlicensed spectrum in the time interval, because the number of symbols available in the subframe is too small, if the base station is at the time The signal mapped to the data channel or the control channel is transmitted in the interval, and then the resources consumed by the corresponding indication message may be larger than the resources used by the base station in the time interval. Optionally, the subframe is combined with the next subframe to be scheduled by using one control channel.

Optionally, the first signal may be carried in the time interval, that is, the first signal may be outside the time window, but the initial sending time of the first signal is within the time window. Taking FIG. 3 as an example, assuming that the data channel is scheduled for the user equipment in the first subframe, the data channel will start from the first moment to the end time of the first subframe, but the deadline of the time window and the first sub-frame There is a time interval between the cutoff times of the frames, so a portion of the first signal may not be within the time window described above. For Figure 4, all of the first signals are within the time window.

Optionally, before the base station acquires the right to use the channel on the unlicensed spectrum, the base station determines the number of resource block pairs allocated to the user equipment and the modulation and coding mode, where the number of the resource block pairs and the modulation and coding mode are used for the user equipment. Determining a transport block size (ie, a raw number of bits of the data packet) transmitted by the user equipment; the base station generates a coded modulated preset modulation symbol set according to the modulation and coding manner and the allocated number of resource block pairs; the resource The block pair is a preset resource block pair, and the preset resource block pair includes a preset number of symbols in the time domain, such as 14 symbol numbers or other, for example, 10 symbol numbers; after the base station grabs the use right of the channel, according to the current sub- The number of symbols available for the frame (such as 11) and the set of preset modulation symbols to determine the actual set of modulation symbols, and to transmit the actual set of modulation symbols in the symbols available in the current subframe. Specifically, the base station needs to perform the scheduling decision and framing of the subframe n a certain length of time. For example, the base station needs to send a data packet for scheduling the user equipment to the user equipment in the subframe n, and needs to determine the scheduling information by using about one and a half subframes in advance, such as modulation and coding mode, allocation information of resource block pairs, and the like, and then advance half. Subframes to generate a set of modulation symbols to be transmitted, ie framing or framing. Generally, the set of modulation symbols is determined according to the amount of resources of the subframe n (such as the number of available symbols). The number of available symbols in the existing system is known in advance, and generally one complete subframe includes 14 symbols. However, for a U-LTE system, a data packet may be transmitted in a non-initial symbol of one subframe, and the base station cannot predict the number of symbols available for the subframe, and the base station needs to preset a preset resource amount (for example, 1 subframe). 14 symbols or 10 symbols), and then according to the preset resource amount, combined with the number of allocated resource block pairs and modulation and coding mode and coded and modulated to generate a preset modulation symbol set, here assume that the base station follows one The complete subframe is used to generate the pre-configured modulation symbol set; then, the first time when the base station acquires the channel usage right is the fourth symbol of a certain subframe, then the base station needs to use the amount of resources available in the current subframe (such as currently available The number of symbols is 11) to select a part of the preset modulation symbol set as the actual modulation symbol set to be transmitted. If the preset modulation symbol set is generated according to 10 symbols, it is necessary to expand and generate the actual modulation symbol set to be transmitted according to the pre-configured modulation symbol set (assuming 11 symbols are available), for example, the foregoing The set of modulation symbols is subjected to rate matching (such as repetition) to achieve the actual modulation symbol set determined by the amount of resources actually available. Hehe. The embodiment is also applicable to the transmission of the reference signal, that is, the reference signal of the preset modulation symbol set is determined first, and then from the preset modulation symbol set according to the number of symbols available in the current subframe or the number of symbols available for transmitting the reference signal. Take a part to send.

For the above-mentioned advance scheduling and framing problems, it is also possible to adopt a method that does not need to be based on a preset resource amount. Optionally, for the first N subframes that preempt the channel, such as N=1, the first subframe is scheduled according to the normal subframe duration of the complete 14 symbols, so that the scheduling of the first subframe may not be followed. The normal subframe boundary of the carrier; starting from the N+1 subframe, restoring to the normal subframe boundary for scheduling, that is, the scheduling of the N+1th subframe is a partial subframe duration to be transmitted only to the next subframe. The boundary, the next N+2 subframe, is then scheduled according to the normal subframe boundary. This can avoid the problem that the amount of resources based on the advance scheduling and framing does not match the amount of resources available in the current subframe after the preemption channel. Specifically, it is assumed that the base station preempts the channel in the fourth symbol of the subframe 0, that is, the information can be sent from the fourth symbol to the user equipment, and the number of symbols available for the subframe is 11. If N=1 is assumed, the scheduling of the current subframe 0 can be extended to the subframe 1, that is, the duration of the scheduling of the fourth symbol holding the subframe 0 is 14 symbols, that is, the extension to the subframe 1 3 symbols. Then, the scheduling starting from the 4th symbol of the subframe 1 can only be sent to the cutoff boundary of the subframe 1, that is, the schedule starting from the 4th symbol on the subframe 1 can only transmit 11 symbols. Next, the scheduling starting at subframe 2 is the scheduling of the normal subframe duration. The scheduling of the first N subframes is maintained across the subframe boundary, so that the base station can perform the scheduling in advance and the amount of resources based on the framing matches the amount of resources available in the current subframe after the preempting channel.

Optionally, the indication message further includes information about a length of time and/or channel switching that the base station continuously uses the channel. Specifically, after the base station acquires the right to use the channel of the unlicensed spectrum, the time limit can be used continuously for a maximum time limit, for example, 10 subframes, that is, the actual length of use is limited by the maximum time length, or actual The length of the use may also be less than the maximum length of time. For example, only 6 subframes are continuously occupied based on the current load, and the length of time may be different after each channel is grabbed. Therefore, the base station needs to notify the user equipment, for example. Placed in the downlink control channel; considering that the first moment can be a non-starting position of one subframe, then In order to meet the above-mentioned maximum time length limitation, the last subframe that is continuously occupied may also occupy a part of the symbol, and how many symbols may be dynamically notified to the user equipment, or the user equipment may limit the subframe according to the first moment and the actual occupied subframe. To calculate, for example, the dynamic notification continuously occupies 6 subframes, and the first moment starts from the 3rd symbol of the first subframe, then the user equipment can calculate that the last sixth subframe can only occupy The first 9 symbols. Optionally, the indication message may also carry carrier switching indication information, because the bandwidth of the unlicensed spectrum is wider, such as more than 100 megahertz, and thus may be divided into multiple carriers, and the channel may be preempted in parallel on each carrier. For example, according to the load size on different carriers and the current channel idle evaluation rules, dynamic carrier selection can be introduced to improve the channel occupancy probability. Then, the carrier selected by the base station needs to be dynamically notified to the user equipment, for example, using downlink control. The method of channel notification. In summary, considering the strong correlation between the above control information and the similar timeliness, the indication message may further include the foregoing control information, thereby saving control channel overhead. The embodiment may be further combined with the foregoing embodiment of the periodic reference signal. Specifically, the UE may determine, according to the indication message, a duration of the current occupied channel of the base station, if the pre-configured periodic reference signal is within the duration, the UE Synchronization and/or measurement may be performed by using the reference signal within the duration; if there is no pre-configured periodic reference signal within the duration or the UE does not receive the indication message, the UE assumes that the pre-configured periodic reference signal does not exist, ie It is not used for synchronization and/or measurement. This can ensure the accuracy of the measurement by the UE using the reference signal, especially the accuracy of the interference measurement, because the interference measurement is accurately measured when the base station occupies the channel, and the interference of other near-end interference nodes is excluded. The interference measurement is caught, and these near-end interferences do not exist in the normal data scheduling due to the use of the LBT mechanism, and such interference measurements are matched with the actual data scheduling.

According to the method provided by the embodiment of the present invention, after acquiring the usage right of the channel of the unlicensed spectrum, the base station may send the first signal including but not limited to one of the control channel, the data channel, the reference signal or the combination as soon as possible, thereby avoiding sending The resource caused by the padding signal is wasted, thereby improving the utilization of resources; at the same time, the user terminal can correctly demodulate or decode the received signal according to the indication message without increasing the computational complexity.

Example 2

In order to understand the present invention more clearly, the embodiment of the present invention further provides a method for transmitting a signal based on Embodiment 1. The method for transmitting a signal proposed by the present invention is further explained in the embodiment of the present invention in conjunction with the timing diagrams of FIG. 7, FIG. 8, and FIG. It should be noted that the method for transmitting signals proposed by the present invention includes, but is not limited to, the three cases shown in FIGS. 7 to 9.

One subframe of the U-LTE system mentioned in the embodiment of the present invention includes 14 OFDM symbols. However, the embodiments of the present invention do not limit the number of time units, such as the number of symbols, included in one subframe in the system in which the method proposed by the present invention is specifically applied.

The method provided by the embodiment of the present invention includes the following steps:

Step 1001: The base station acquires the usage right of the channel of the unlicensed spectrum in the time window. For example, the unlicensed spectrum resource includes a spectrum resource having a frequency in the range of 2.4 GHz to 2.4835 GHz, or a spectrum resource in the range of 5.725 GHz to 5.85 GHz, or a spectrum resource in the vicinity of 60 GHz, and the embodiment of the present invention and other embodiments of the present invention Without specific limitation, the division and determination of unlicensed spectrum resources shall be subject to the policies of each country or region.

In a specific implementation process, the time window can be set in various ways, including but not limited to the time window division method shown in FIG. 3 to FIG. 9: optional, as shown in FIG. 7, the time window starts from The start time is specifically the start time of one subframe, and the cut-off time of the time window coincides with the cut-off time of the eighth symbol of the subframe, that is, the time length of the eight symbols is included in the time window.

Optionally, as shown in FIG. 8 , the start time of the time window is specifically a start time of one subframe, and the cut-off time of the time window coincides with the cut-off time of the subframe, that is, the time window includes 14 symbols. length of time.

Optionally, as shown in FIG. 9, the time window includes the last 8 symbols of the first subframe and the first 8 symbols of the second subframe, where the first subframe and the second subframe are shown at time. The second sub-frame is specifically the next sub-frame of the first sub-frame, and the start time of the time window is specifically the start time of the seventh symbol of the first sub-frame, and the cut-off time is specifically The eighth character of the second subframe The deadline for the number.

In a specific implementation step 1001, the method for the base station to acquire the right to use the channel on the unlicensed spectrum may be through competition or the right to use obtained by coordinating with other communication devices. This embodiment does not further limit how the base station specifically acquires the usage right.

In an embodiment of the present invention, particularly, the base station t within the time window of _a time determined gain unauthorized use of spectrum to the channel, wherein, t within a symbol _clock time may be located in a sub-frame, i.e., time t ₁ is neither the starting time of the symbol coincide with nor overlap off time of the symbol, for example, as shown in FIGS. 7 and 8; t ₁ may coincide in time with the starting time of a symbol, for example, FIG. 9 Shown.

Step 1002: After acquiring the usage right of the channel, the base station starts transmitting the first signal on the channel at a first moment in the time window. The first signal includes at least one of the following: a control channel, a data channel, and a reference signal. In a process of performing step 1002, optionally, the first moment when the base station sends the first signal may not be a subframe. The starting time of the base station is sent by the base station to obtain a first moment, which is a start time of the symbol; and the first moment when the base station sends the first signal is specifically a time t ₂ .

In a specific implementation process, the first moment is not later than a start time of a next symbol at a time when the base station acquires the usage right of the channel.

If the starting time t ₁ symbol time does not coincide, then the time t ₂ is the particular starting time t ₁ of the next symbol where the symbol timing. In a specific embodiment of the process, optionally, the filling station to the transmission signal within a time t _2, the time gap between time t _1, in order to prevent the occupation of the channel and the channel occupied by other communication devices; Alternatively, the said base station at time t ₁ to time t ₂ in time no gap between the transmission channel; the base station sends a short time t ₁ to time t between the reference signal the _second time interval. If the time t ₁ specifically coincides with the start time of the symbol, then the time t ₂ coincides with the time t ₁ .

In the present embodiment, for example in FIG. 7, FIG. 8, the time t ₁ does not coincide with the starting time of any symbol in a time window starting time t may be the next symbol after the _clock time as transmitting a first signal a first time, i.e., time t _2, i.e., the first time is indicated by the instruction information t _2, or the indication information may also indicate the time t _₁₁ until time t or symbols starting time at this time The user equipment may receive the short reference signal sent between t ₁ and t ₂ . Of course, the indication manner requires that the overhead of the indication information increases as the indicated time granularity decreases; as shown in FIG. 9 , the time t ₁ is starting time of a symbol in the time window are coincident, transmitting a first time t ₁ a first timing signal and the base station coincides with the time t _2.

According to the method of the embodiment of the present invention, in conjunction with the timing diagrams shown in FIG. 7 to FIG. 8 , the base station may send one of the control channel, the data channel, the reference signal, or a combination as soon as possible after acquiring the usage right of the channel of the unlicensed spectrum. The first signal does not have to wait until the start time of the subframe to transmit, thereby avoiding waste of the transmission resources in the time domain.

Step 1003: The base station sends an indication message at a second moment, where the second moment is not earlier than a deadline of the time window, and the indication message includes that the base station sends the first signal in the time window. Instructions.

Optionally, the indication message carries an indication that the base station sends the first information in the first time in the time window, so that the user equipment detects the first moment of the base station in the time window according to the indication message. The first signal to be sent, where the first signal needs to be completely received and buffered before the detection is required, or the user equipment is configured to detect the received reference signal according to the indication message.

In the process of performing step 1003, optionally, the indication message is carried on a channel of the licensed spectrum. For example, as shown in FIG. 7 or FIG. 9, the indication message is transmitted on a channel of the licensed spectrum to indicate a signal transmission within a time window on a channel of the unlicensed spectrum. Since the channel quality of the authorized channel is good, and the channel resource can be controlled by the base station, the user equipment can receive the indication message with high reliability. Optionally, the indication information may carry, by the base station, information about using a channel or transmitting a signal on a channel of multiple unlicensed spectrums.

In the process of performing step 1003, optionally, as shown in FIG. 8, the indication message may also be carried on a channel of an unlicensed spectrum. By carrying the indication message on the channel of the unlicensed spectrum To save the transmission resources of the channel of the licensed spectrum. The sending resource of the specific indication message may start from the start time of the next subframe of the subframe in which the time window corresponding to the indication message is located, as shown in FIG. 8; or may be the subframe in which the time window corresponding to the indication message is located. The last N symbols.

The downlink control channel mentioned here may be a physical downlink control channel PDCCH, an enhanced physical downlink control channel EPDCCH (Enhanced PDCCH), a physical HARQ indicator channel or a physical control format indication channel, and the like.

During the specific implementation of step 1003, the indication message is located at a location that the user equipment can predict. Specifically, the second moment is specifically a preset moment: optionally, the second moment when the base station sends the indication message is specifically the next subframe of the subframe where the deadline of the time window is located The start time of the frame is, for example, as shown in FIG. 7 and FIG. 8; optionally, the indication message is specifically located at the last position of the subframe where the cut-off time of the time window is located, for example, the last symbol as shown in FIG. on. Optionally, the second moment is specifically a moment configured by the base station.

During the specific implementation of step 1003, as shown in FIG. 8 and FIG. 9, there is a time interval between the indication message and the cutoff time of the corresponding time window, so that the base station has enough time to form the indication message. When the base station acquires the usage right of the channel of the unlicensed spectrum in the time interval, optionally, the base station sends a padding signal or a reference signal to occupy the channel in the time interval.

Optionally, the first signal includes one or a combination of a control channel, a data channel, and a reference signal, where the indication message indicates that the base station sends the first signal at the first moment. . Specifically, for example, in the timing diagram shown in FIG. 7, the indication message includes 4 bits, and the 4 bits can form 16 different states, and 14 of the states are selected to indicate that the base station is in the time window. The start time of one of the 14 OFDM symbols begins to transmit a signal. For example, the binary symbol 0000 formed by the 4 bits of the indication message indicates that the base station starts transmitting the first signal at the start time of the first symbol, and 0001 identifies that the base station starts to transmit at the start time of the second symbol. The first signal, and so on, when the content of the indication message is specifically 1101, indicating that the base station starts to send the first time at the start time of the 14th symbol. signal. In addition, different time windows corresponding to the indication messages sent by different subframes (such as adjacent subframes) may partially overlap to improve scheduling flexibility.

For another example, as shown in the timing diagram shown in FIG. 7, the indication message includes 3 bits, and the 3 bits can form 8 different states, and the 8 different states are used to indicate that the base station is within the time window. The start time of a certain one of the 8 OFDM symbols starts to transmit a signal. For example, the binary symbol 000 formed by the 3 bits of the indication message indicates that the base station starts transmitting the first signal at the start time of the first symbol, and 001 identifies that the base station starts to send at the start time of the second symbol. The first signal, and so on, when the content of the indication message is specifically 111, instructs the base station to start transmitting the first signal at the start time of the eighth symbol.

In a process of performing step 1003, optionally, the first signal includes a reference signal, where the indication message indicates that the base station sends the first signal in the time window, so that the user equipment is in the time window. The reference signal is detected internally. Specifically, for example, in the timing diagram shown in FIG. 9, the indication message includes 1 bit, and the 1 bit can form 2 different states to indicate whether the base station sends the first signal in the time window. . For example, when the indication message is 1, the base station is instructed to send the first signal in the time window, and the user equipment that communicates with the base station detects the signal of the time window according to the indication message; when the indication message is When it is 0, it indicates that the base station does not send the first signal in the time window, and the user equipment does not detect the signal in the time window according to the indication message to save power consumption.

For the user equipment that communicates with the base station, the user equipment can buffer the signal in the time window; considering the low power consumption requirement of the user equipment, the user equipment is difficult to have the first possible in each time window. The signal is blindly detected and demodulated or decoded at one or a combination of a data channel, a control channel, and a reference signal carried on the first signal, but the user equipment determines that the received message is in the time window by starting the received message at the second moment. Whether the first signal is included in the buffer signal; when the indication message indicates that the buffered signal includes the first signal carrying one or a combination of the data channel, the control channel, and the reference signal, the user equipment performs the buffered signal Detect to obtain the information included in the buffered signal.

The present embodiment is a description of a specific scenario in conjunction with the embodiment 1. Therefore, the definition and explanation of the related concepts in the embodiment 1 are also applicable in the embodiment, and the details are not described in this embodiment.

According to the method provided by the embodiment of the present invention, after determining, by the base station, the right to use the channel of the unlicensed spectrum in the time window, the base station may immediately send the first signal; and send the bearer at the second time to indicate that the base station is in the time window. An indication message for transmitting the first signal. According to the method of the embodiment of the present invention, the length of time occupied by the padding signal can be effectively reduced in time, and the resource utilization rate can be improved. At the same time, the user equipment can correctly demodulate or decode according to the indication message on the premise of increasing the calculation amount. Information carried on the first signal transmitted by the base station within the time window.

Example 3

Corresponding to the method for transmitting a signal according to Embodiment 1 and Embodiment 2 of the present invention, an embodiment of the present invention provides a method for receiving a signal. FIG. 11 shows a method for receiving a signal according to an embodiment of the present invention. The method includes the following steps:

Step 1101: The user equipment of the U-LTE system receives and buffers the signal on the unlicensed spectrum channel, where the received and buffered signal includes the first signal sent by the base station, starting from the first moment in the time window. The first signal includes one or a combination of a control channel, a data channel, and a reference signal;

Step 1102: The user equipment receives an indication message at a second moment.

Step 1103: The user equipment detects the first signal according to the indication message.

The second moment is not earlier than the time window deadline.

Optionally, the first moment is not later than a starting moment of a next symbol at a time when the base station acquires the usage right of the channel in the time window.

Optionally, there is a time interval between the cutoff time of the time window and the second time.

Optionally, the time window includes a length of time less than a time length of one subframe; or the time window includes a length of time equal to a time length of one subframe; or the time window The length of time included is greater than the length of time of one subframe.

Optionally, the time window includes each part of time resources in two consecutive subframes.

Optionally, the second time includes a predefined time; optionally, the second time includes a start time of a next subframe of the subframe in which the time window is cut off; optionally, the The second time includes a corresponding time of the N symbols before the end time of the subframe where the time window is cut off, wherein the N symbols are not smaller than the number of symbols occupied by the indication message.

Optionally, the indication message is transmitted on a channel of the licensed spectrum; optionally, the indication message is transmitted on a channel of the unlicensed spectrum.

Optionally, the indication message further includes a length of time that the base station continuously uses the channel and/or a time of channel switching.

The definitions of the time window, the second time, and the indication message in the embodiment of the present invention are the same as those in the first embodiment and the second embodiment of the present invention, and are not described herein again.

In the embodiment of the present invention, the user equipment of the U-LTE system attempts to communicate with the base station of the U-LTE system on a channel of the unlicensed spectrum, where the base station of the U-LTE system transmits on the channel of the unlicensed spectrum. The method of the signal has been described in detail in Embodiment 1 of the present invention and Embodiment 2 of the present invention, and details are not described herein again.

During the specific implementation of step 1101, the user equipment of the U-LTE system receives and buffers signals of channels of the unlicensed spectrum. In the embodiment of the present invention, the receiving may be understood as a buffer, or an operation of receiving the buffer is parallel; optionally, the user equipment may also include a channel estimation, a constellation point demodulation, and the like on the received and buffered signal. But does not include the decoding operation.

In a specific implementation process, corresponding to the method for transmitting a signal in Embodiment 1 and Embodiment 2 of the present invention, when the base station of the U-LTE system determines to obtain the usage right of the channel of the unlicensed spectrum, it immediately transmits the bearer data. a first signal of the channel, the control channel, the reference signal, or the combination; the user equipment of the U-LTE system cannot determine whether the base station acquires in the time window before the base station sends the base station to send the indication message The user equipment of the unlicensed spectrum transmits the first signal, and the user equipment first receives and buffers the signal of the channel. In order to detect the portion of the first signal in the received and buffered signals in accordance with the received indication message in step 1103.

In a specific implementation step 1101, the receiving and buffering signal includes a first signal from a first moment in a time window, and refers to a first occurrence of the received and buffered signal. The signal, here is not limited to whether the first signal has been completely received within the time window.

In a specific implementation process, the user equipment receives and buffers at least a signal on a channel of the unlicensed spectrum within a time window. Since the user equipment cannot predict at which time in the time window the base station of the U-LTE system transmits the first signal, it is not possible to predict whether the base station of the U-LTE system transmits the first signal in the time window. The user equipment therefore receives and buffers at least the signals within the time window.

In a specific implementation process, optionally, the time length of the signal of the unlicensed spectrum channel received and buffered by the user equipment includes a time range including a time window, and a deadline of the time window to detect the indication message. time. That is, for detecting or decoding a downlink data packet, the length of time that the user equipment needs to be buffered is greater than the length of time that the downlink data packet occupies. Specifically, as shown in FIG. 12, assuming that the time window is a complete subframe (other cases are as described in the foregoing embodiment), the first signal of the subframe in which the time window is located is sent. The first moment of a signal is indicated by the PDCCH of the next subframe on the grant carrier, ie the indication information is transmitted in the first N symbols of the next subframe, such as the first 4 symbols. At this time, in order for the user equipment to detect the first signal, the length of time that the user equipment needs to be buffered is from the starting point of the time window to the duration of detecting the indication message, and may specifically include a time window duration (in this example, one subframe) Time duration + the time interval between the time window cut-off point to the initial transmission point of the indication message (0 in this example) + the length of the buffer indication message (4 symbols in this example) + detection of the indication message required Time (assuming a symbol in this example). Optionally, for detecting or decoding the downlink data packets of two consecutive subframes, the two time intervals that the user equipment needs to separately cache are overlapped in the time domain. If the user equipment does not receive the indication message, the user equipment clears the cache window. At least part of the information, considering that the buffer windows of consecutive subframes may overlap, the user equipment also retains part of the information of the previous buffer window and starts buffering of the first signal corresponding to the next subframe.

In a specific implementation process, optionally, the indication message is carried at a first moment in the time window, and the received and buffered signal includes information of the first signal. That is, the indication message instructs the base station to transmit the first moment of the first signal. Optionally, the user equipment determines the first moment according to the indication message; the user equipment detects the first signal according to the first moment: specifically, the first signal includes a data channel and a control channel. Or combining, the user equipment determines, according to the first moment, a portion of the first signal in the received and buffered signal, and decodes the first signal; or the first signal includes a reference signal, The user equipment determines, according to the first moment, a portion of the reference signal in the received and buffered signal, and detects the reference signal.

In a specific implementation process, optionally, the indication message is carried in the time window, and the received and buffered signal includes information of the reference signal. That is, the indication message instructs the base station to transmit the first signal within the time window. Optionally, the user equipment determines, according to the indication message, that the reference signal is included in the received and buffered signal, and the user equipment detects the reference signal according to the indication message. The user terminal performs tasks such as channel estimation, time-frequency synchronization, radio resource management measurement, and the like according to the reference signal.

The user terminal determines a portion of the reference signal in the buffered signal according to the indication message, and performs tasks such as channel estimation, time-frequency synchronization, and radio resource management measurement according to the reference signal.

In a specific implementation process, optionally, the indication message carries a first time from the time window, and the signal received and buffered in the time window includes the information of the first signal: optionally The user equipment determines, according to the indication message, that the first signal includes a reference signal, where a time interval between the first time indicated by the indication message and the termination time of the subframe where the first time is located is less than a threshold. Optionally, the user equipment determines, according to the indication message, that the first signal includes one or a combination of a data channel and a control channel, where the indication message refers to The time interval between the first time indicated and the end time of the subframe in which the first time is located is not less than the threshold. Specifically, the threshold may be a number of symbols. For example, if the threshold is set to 6 symbols, when the time interval between the first time and the termination boundary of the subframe is less than 6 symbols, the first time A signal is specifically a reference signal; otherwise, the first signal is specifically one or a combination of a data channel or a control channel.

According to the method provided by the embodiment of the present invention, a user equipment of a U-LTE system receives and buffers a signal in a time window on a channel of an unlicensed spectrum, wherein the receiving is started from a first moment in the time window. The buffered signal includes a first signal; the user equipment receives an indication message at a second moment after the first moment; the user equipment detects, according to the indication message, the receiving and buffering in the time window. The first signal in the signal. According to the method provided by the embodiment of the present invention, when the base station of the U-LTE system utilizes the resources of the channel of the unlicensed spectrum with high efficiency, the user equipment of the U-LTE system increases the computation complexity. The information carried in the first signal can be correctly obtained.

Example 4

In order to enable a person skilled in the art to more clearly understand the method for receiving a signal proposed in Embodiment 3 of the present invention, and the method for transmitting a signal proposed in Embodiments 1 and 2 of the present invention, the embodiment of the present invention is in Embodiment 1 to 3 A method of communication is proposed based on the method of transmitting a signal and the method of receiving a signal proposed in Embodiments 1 to 3 of the present invention. The method for receiving a signal proposed by the present invention is further explained in the embodiment of the present invention in conjunction with the timing diagrams of FIGS. 3 to 9.

FIG. 12 is a flowchart of a method for communication according to an embodiment of the present invention. The method provided by the embodiment of the present invention includes the following steps:

In step 1201, the base station of the U-LTE system obtains the usage right of the channel of the unlicensed spectrum in the time window.

In a specific implementation process, as in the method 201 of the embodiment of the present invention and the step 1001 of the embodiment 2 of the present invention, the base station of the U-LTE system acquires the usage right of the channel of the unlicensed spectrum, and the base station of the U-LTE system The method for obtaining the right to use the channel may be obtained by a certain rule competition, or may be obtained by coordinating with other communication devices, which is not further limited by the embodiment of the present invention.

Step 1202: After obtaining the usage right of the channel, the base station starts transmitting a first signal on the channel at a first moment in the time window, where the first signal includes at least one of the following: Control channel, data channel, reference signal.

In a specific implementation process, optionally, the first moment is not later than a start time of a next symbol at a time when the base station acquires the usage right of the channel.

In a specific implementation process, the first signal may include, but is not limited to, one or a combination of a control channel, a data channel, or a reference signal, that is, the first signal carries valid information, not just a useless padding signal.

In a specific implementation process, the time when the base station obtains the usage right of the channel may be the start time of one symbol, or may not coincide with the start time of one symbol. Optionally, when the time when the base station obtains the usage right of the channel specifically coincides with the start time of a symbol in the time window, the first time when the base station sends the first signal and the base station obtain the The time of use of the channel coincides; optionally, when the base station obtains the right to use the channel, the base station will acquire the use of the channel when the start time of any symbol in the time window coincides The start time of the next symbol at the time of the right is taken as the first time and the first signal is transmitted.

For example, as shown in FIG. 7 and FIG. 8 , the time when the base station obtains the usage right of the channel of the unlicensed spectrum is specifically t ₁ time, and t _{1 does} not coincide with the start time of any symbol in the time window; said base station at the start time of the next symbol time t _1, i.e., time t _2, as a first time point, starts to send the first signal. Alternatively, the filling station to the transmission signal within a time t _2, the time interval between the time t ₁ to occupy a channel; alternatively, the base station does not transmit any signal within the time interval.

As another example, FIG. 9, the time to obtain the right to use the base station channel as shown in the unlicensed spectrum of the starting time t ₁ and a time within a time window coinciding symbols; the base station starts transmitting at time t ₁ The first signal, that is, the time t _{1 is} the first time.

The base station can immediately transmit the first signal carrying the valid information after obtaining the use right of the channel of the unlicensed spectrum, thereby avoiding waste of channel resources caused by sending the padding signal, thereby improving the utilization of the transmission resource.

Step 1203: The user equipment of the U-LTE system receives and buffers the signal on the unlicensed spectrum channel, where the received and buffered signal includes the first signal from the first moment of the time window. In a specific implementation process, the user equipment of the U-LTE system cannot know in real time when the base station of the U-LTE system can obtain the usage right of the channel of the unlicensed spectrum; the user equipment of the U-LTE system can The signal on the channel of the licensed spectrum is received and buffered; the time of the buffer includes at least the corresponding part of the time window. In a specific implementation process, optionally, the time of the buffer may also include the deadline of the time window to receive the message. Or decode the time of the deadline part.

Step 1204: The base station sends an indication message at a second moment, where the second moment is not earlier than a deadline of the time window, and the indication message includes the base station sending the first time in the time window. Signal indication. In the embodiment of the present invention, the location of the second time relative to the time window, the content of the indication message, the physical channel of the bearer indication message, and the like are the same as those in the method of step 1003 of Embodiment 2 of the present invention, and the embodiment of the present invention does not. Let me repeat.

Step 1205: The user equipment receives an indication message at a second moment after the time window deadline; wherein the indication message carries information that includes the first signal in a signal received and buffered in the time window. .

Step 1206, the user equipment detects the first signal according to the indication message.

In a specific implementation, optionally, the first signal includes one or a combination of a control channel, a data channel, and a reference signal, where the indication message includes a first time that the base station sends the first signal in a time window. At the moment, the user equipment determines, according to the indication of the indication message, Decoding, in the stored signal, the first moment of the first signal, the user equipment further determines, according to the first moment, a portion including the first signal from the buffered signal, and demodulates or decodes the first Information carried on a signal.

In a specific implementation, optionally, the first signal includes a reference signal, where the indication message includes whether the base station sends the first signal in a time window; and the user equipment determines, according to the indication message, the The first signal is detected in the buffered signal.

Specifically, in the embodiment of the present invention, as shown in FIG. 7, the first signal includes one or a combination of a data channel, a control channel, and a reference signal. The indication message includes 4 bits, 14 of the 16 different states that 4 bits can form to indicate the start time of the first signal in the signal received and buffered by the user equipment within the time window.

Specifically, in the embodiment of the present invention, as shown in FIG. 8, the first signal includes a reference signal, the indication message includes 1 bit, and 1 bit may represent different conditions in 2, where one case indicates the base station Transmitting a first signal within a time window; the user equipment detects signals received and buffered within a time window according to the indication message to perform tasks such as channel estimation, time-frequency synchronization, radio resource management measurement, and the like.

According to the method provided by the embodiment of the present invention, the base station of the U-LTE system can obtain the use right of the channel of the unlicensed spectrum in the time window, and immediately send the valid signal, thereby improving the resource utilization rate of the channel of the unlicensed spectrum; The user equipment of the U-LTE system can correctly acquire the information carried in the first signal according to the indication message received later, without increasing the computational complexity.

Example 5

The embodiment of the present invention provides a device for transmitting a signal, and the device provided by the embodiment of the present invention can be used to implement the method for transmitting a signal according to Embodiment 1 of the present invention and Embodiment 2 of the present invention.

FIG. 13 is a structural diagram of a device for transmitting a signal according to an embodiment of the present invention, where the device is configured A processor 1301 and a transceiver 1302 are included, wherein:

The processor 1301 is configured to acquire, by using the transceiver, the right to use the channel on the unlicensed spectrum in a time window;

The transceiver 1302 is configured to: after acquiring the usage right of the channel, start sending a first signal on the channel at a first moment in the time window; wherein the first signal includes at least one of the following Kind: control channel, data channel, reference signal;

The transceiver 1302 is further configured to send an indication message at a second moment;

Wherein the second moment is not earlier than the time window deadline;

In a specific implementation process, optionally, the first moment is not later than a start time of a next symbol at a time when the base station acquires the usage right of the channel in the time window;

In a specific implementation process, optionally, there is a time interval between the cutoff time of the time window and the second time.

Optionally, the time window includes a time length that is less than a time length of one subframe; or, the time window includes a time length equal to a time length of one subframe; or, the time The length of time included in the window is greater than the length of time of one subframe.

In a specific implementation process, optionally, the time window includes each part of time resources in two consecutive subframes.

In a specific implementation process, optionally, the second moment is located at a preset moment of the subframe.

In a specific implementation process, optionally, the second time includes a start time of a next subframe of the subframe in which the time window is cut off; or the second time includes a time window of the time window The termination time of the subframe is forwarded to the time corresponding to the N symbols, where the N symbols are not smaller than the number of symbols occupied by the indication message.

In a specific implementation process, optionally, the indication message is transmitted on a channel of the licensed spectrum; or the indication message is transmitted on a channel of the unlicensed spectrum.

In a specific implementation process, optionally, the first signal includes one or a combination of a control channel, a data channel, and a reference signal, where the indication message indicates that the device that sends the signal is in the time window. Transmitting the first signal at a first time; or the first signal includes a reference signal, the indication message indicating that the device transmitting the signal transmits the first signal within the time window.

In a specific implementation process, optionally, after acquiring the usage right of the channel, the transceiver starts transmitting the first signal on the channel at a first moment in the time window, including: sending and receiving And transmitting, by the first moment, a reference signal, wherein a time interval between the first moment and a termination time of the subframe in which the first moment is located is less than a threshold; or the transceiver is from the first moment And starting to send one or a combination of the control channel and the data channel, wherein a time interval between the first moment and a termination time of the subframe where the first moment is located is not less than the threshold.

In a specific implementation process, optionally, the reference signal is an aperiodic reference signal, where the time-frequency resource of the subframe is pre-configured or temporarily notified; the reference signal is a periodic reference. The signal, the period of the periodic reference signal, and the time-frequency resource of the periodic signal in the subframe are pre-configured.

In a specific implementation process, optionally, the indication message further includes information about a length of time and/or channel switching of the channel continuously used by the base station.

According to the apparatus for transmitting a signal according to an embodiment of the present invention, after the apparatus for transmitting a signal determines the right to use the channel of the unlicensed spectrum in the time window, the first signal may be immediately sent; and the bearer is sent at the second time. Instructing the means for transmitting the signal to transmit an indication message of the first signal within a time window. According to the device provided by the embodiment of the present invention, the time length occupied by the padding signal can be effectively reduced in time, and the resource utilization rate can be improved. At the same time, the user equipment can correctly demodulate according to the indication message on the premise that the calculation amount is not increased. Decoding in the time window The information carried on the first signal sent.

Example 6

The embodiment of the present invention provides a device for receiving a signal, and the device provided by the embodiment of the present invention can be used to implement the method for transmitting a signal according to Embodiment 3 of the present invention.

FIG. 14 is a structural diagram of the apparatus for transmitting a signal according to an embodiment of the present invention. The apparatus includes a processor 1401, a transceiver 1402, and a buffer 1403, where:

The transceiver 1402 is configured to receive a signal on an unlicensed spectrum channel;

The buffer 1403 is configured to buffer a signal on the unlicensed spectrum channel received by the transceiver, where the received and buffered signal includes a first signal sent by the base station, starting from a first time in the time window. The first signal includes one or a combination of a control channel, a data channel, and a reference signal; the transceiver 1402 receives an indication message at a second time after the time window deadline; wherein the indication message is carried in the time window The signal received and buffered therein includes information of the first signal;

The processor 1401 is configured to detect the first signal according to the indication message.

In a specific implementation process, optionally, the time window includes a length of time less than a time length of one subframe; or the time window includes a length of time equal to a time length of one subframe.

In a specific implementation process, optionally, the second moment includes a predefined moment.

In a specific implementation process, optionally, the second moment includes a start time of a next subframe including a subframe in which the time window is cut off; or the second moment includes the time window deadline The end time of the subframe in which the subframe is located is forwarded to the corresponding time of the N symbols, where the N symbols are not smaller than the number of symbols occupied by the indication message.

In a specific implementation process, optionally, the signal buffered by the transceiver and buffered by the buffer further includes a signal from a cutoff time of the time window to a time when the indication message is detected.

Optionally, the indication message carries information that includes the first signal in a signal received and buffered in the time window, where the first signal includes a data channel and a control channel. In one or a combination, the indication message carries information from the first time of the time window, and the signal received and buffered within the time window includes information of the first signal.

In a specific implementation process, optionally, the processor 1401 detects the first signal according to the indication message, where the processor is configured to determine the first moment according to the indication message; The processor is further configured to decode the first signal according to the first moment.

Optionally, the indication message carries information that includes the first signal in a signal received and buffered in the time window, where the first signal includes a reference signal, The indication message carries information from the first time in the time window, the signal received and buffered in the time window includes information of the first signal; or the first signal includes a reference signal, and the indication message carries The information of the first signal is included in the signal received and buffered within the time window.

In a specific implementation process, optionally, the processor detects the reference signal according to the information of the first moment carried in the indication message; or the processor is configured according to the indication message, The reference signal is detected.

In a specific implementation process, optionally, the indication message carries information from the first moment of the time window, and the signal received and buffered in the time window includes information of the first signal; The processor is configured to determine, according to the indication message, that the first signal includes a reference signal, where a time interval between the first moment indicated by the indication message and a termination moment of the subframe where the first moment is located is less than a threshold; Or the processor determines, according to the indication message, that the first signal includes one or a combination of a data channel and a control channel, where the first time indicated by the indication message and the subframe where the first time is located The time interval between the termination times is not less than the threshold.

In a specific implementation process, optionally, the reference signal is an aperiodic reference signal, and the time-frequency resource of the aperiodic reference signal in the subframe is pre-configured or temporarily notified; or the reference signal is The periodic reference signal, the period of the periodic reference signal and the time-frequency resource of the periodic reference signal in the subframe are pre-configured.

In a specific implementation process, optionally, the indication message further includes information about a length of time and/or channel switching of continuously receiving signals on the channel.

According to an apparatus provided by an embodiment of the present invention, a device for receiving a signal receives and buffers a signal within a time window on a channel of an unlicensed spectrum, wherein the received and buffered signal is started from a first time in the time window Included in the first signal; the means for receiving a signal receiving an indication message at a second time after the first time; the means for receiving a signal detecting the receiving and buffering in the time window according to the indication message The first signal in the signal. According to the apparatus provided by the embodiment of the present invention, when the base station of the U-LTE system utilizes the resources of the channel of the unlicensed spectrum with higher efficiency, the apparatus for receiving the signal of the U-LTE system has almost no increase in computational complexity. The information carried in the first signal can be correctly obtained.

Claims

A method for transmitting a signal, comprising:

The base station of the U-LTE system acquires the right to use the channel on the unlicensed spectrum in a time window;

After acquiring the usage right of the channel, the base station starts to send the first signal on the channel at a first moment in the time window; wherein the first signal includes at least one of the following: a control channel, Data channel, reference signal

The base station sends an indication message at a second time; wherein the indication message includes an indication that the base station sends the first signal in the time window, and the second time is not earlier than a deadline of the time window time.
The method of claim 1 wherein there is a time interval between the cutoff time of the time window and the second time.
The method according to any one of claims 1 to 2, wherein the time window comprises a length of time smaller than a time length of one subframe; or

The time window includes a length of time equal to the length of time of one subframe.
The method according to any one of claims 1 to 3, wherein the time window comprises each part of time resources in two consecutive subframes.
The method according to any one of claims 1 to 4, wherein the second moment is at a preset time of the subframe.
The method according to any one of claims 1 to 5, wherein the second time instant comprises a start time of a next subframe of a subframe in which the time window cutoff time is located; or

The second time includes a time corresponding to the N times of the end time of the subframe where the time window is cut off, where the N symbols are not smaller than the number of symbols occupied by the indication message.
The method according to any one of claims 1 to 6, wherein the indication message is transmitted on a channel of the licensed spectrum; or

The indication message is transmitted on a channel of the unlicensed spectrum.
The method according to any one of claims 1 to 7, wherein the first signal comprises one or a combination of a control channel, a data channel and a reference signal, the indication message indicating that the base station is within the time window Transmitting the first signal at the first moment; or

The first signal includes a reference signal, the indication message instructing the base station to transmit the first signal within the time window.
The method according to any one of claims 1 to 8, wherein the base station starts transmitting the first signal on the channel at a first moment in the time window after acquiring the usage right of the channel. include:

The base station sends a reference signal from the first moment, where a time interval between the first moment and a termination time of the subframe in which the first moment is located is less than a threshold; or

The base station sends one or a combination of a control channel and a data channel from the first moment, where a time interval between the first moment and a termination time of the subframe in which the first moment is located is not less than the threshold .
The method according to claim 8 or 9, wherein the reference signal is an aperiodic reference signal, and the time-frequency resource of the aperiodic reference signal in the subframe is pre-configured or temporarily notified; or

The reference signal is a periodic reference signal, and a period of the periodic reference signal and a time-frequency resource of the periodic reference signal in a subframe are pre-configured.
The method according to any one of claims 1 to 10, wherein the indication message further comprises information of a length of time and/or channel switching in which the base station continuously uses the channel.
A method for receiving a signal, comprising:

The user equipment of the U-LTE system receives and buffers signals on the unlicensed spectrum channel, where Starting at a first time in the time window, the received and buffered signal includes a first signal sent by the base station, where the first signal includes one or a combination of a control channel, a data channel, and a reference signal;

Receiving, by the user equipment, an indication message at a second moment after the time window is cut off; wherein the indication message carries information that includes the first signal in a signal received and buffered in the time window;

The user equipment detects the first signal according to the indication message.
The method of claim 12 wherein there is a time interval between the cutoff time of the time window and the second time.
The method according to any one of claims 12 to 13, wherein the time window comprises a length of time less than a time length of one subframe; or

The time window includes a length of time equal to the length of time of one subframe.
The method according to any one of claims 12 to 14, wherein the time window comprises each part of time resources in two consecutive subframes.
A method according to any one of claims 12 to 15, wherein said second time instant comprises a predefined time instant.
The method according to any one of claims 12 to 16, wherein the second time instant comprises a start time of a next subframe of a subframe in which the time window cutoff time is located; or

The second time includes a time corresponding to the N times of the end time of the subframe where the time window is cut off, where the N symbols are not smaller than the number of symbols occupied by the indication message.
The method according to any one of claims 12 to 17, wherein the indication message is transmitted on a channel of the licensed spectrum; or

The indication message is transmitted on a channel of the unlicensed spectrum.
The method according to any one of claims 12 to 18, wherein the signal received and buffered by the user equipment further comprises: detecting the indication from a deadline of the time window The signal between the moments of the message.
The method according to any one of claims 12 to 19, wherein the indication message carries information including the first signal in a signal received and buffered in the time window, including:

The first signal includes one or a combination of a data channel and a control channel, the indication message carrying a first signal from a first time of the time window, and the signal received and buffered in the time window includes the first signal Information.
The method according to claim 20, wherein the detecting, by the user equipment, the first signal according to the indication message comprises: determining, by the user equipment, the first moment according to the indication message;

The user equipment decodes the first signal according to the first moment.
The method according to any one of claims 12 to 19, wherein the indication message carries information including the first signal in a signal received and buffered in the time window, including:

The first signal includes a reference signal carrying information including the first signal from a first time of the time window, and a signal received and buffered within the time window; or

The first signal includes a reference signal carrying information including the first signal in a signal received and buffered within the time window.
The method according to claim 22, wherein the user equipment detects the reference signal according to information of a first moment carried in the indication message; or

The user equipment detects the reference signal according to the indication message.
The method according to any one of claims 12 to 19, wherein the indication message carries a letter received and buffered within the time window from a first time of the time window The number includes information of the first signal;

Determining, according to the indication message, that the first signal includes a reference signal, where a time interval between a first moment indicated by the indication message and a termination time of a subframe where the first moment is located is less than a threshold. ;or

Determining, by the user equipment, that the first signal includes one or a combination of a data channel and a control channel according to the indication message, where the first time indicated by the indication message and the subframe where the first time is located The time interval between the end times is not less than the threshold.
The method according to any one of claims 12 to 19, 22 to 24, wherein the reference signal is an aperiodic reference signal, and the time-frequency resource of the aperiodic reference signal in the subframe is pre-configured or Temporary notice; or

The reference signal is a periodic reference signal, and a period of the periodic reference signal and a time-frequency resource of the periodic reference signal in a subframe are pre-configured.
The method according to any one of claims 12 to 25, wherein the indication message further comprises information on the length of time and/or channel switching of the signal continuously received on the channel.
An apparatus for transmitting a signal, comprising: a transceiver and a processor, wherein: the processor is configured to acquire, by using the transceiver, a right to use a channel on an unlicensed spectrum in a time window;

The transceiver is configured to: after acquiring the usage right of the channel, send a first signal on the channel at a first moment in the time window; wherein the first signal includes at least one of the following: Control channel, data channel, reference signal;

The transceiver is further configured to send an indication message at a second moment;

Wherein the second moment is not earlier than the time window deadline;

Wherein the indication message includes the means for transmitting the signal to send in the time window An indication of the first signal.
The apparatus according to claim 27, wherein there is a time interval between the cutoff time of said time window and said second time.
The apparatus according to any one of claims 27 to 28, wherein said time window comprises a length of time less than a length of time of one subframe; or

The time window includes a length of time equal to the length of time of one subframe.
The apparatus according to any one of claims 27 to 29, wherein said time window comprises each of a plurality of time resources in two consecutive subframes.
The apparatus according to any one of claims 27 to 30, wherein the second time is at a preset time of the subframe.
The apparatus according to any one of claims 27 to 31, wherein the second time instant comprises a start time of a next subframe of a subframe in which the time window cutoff time is located; or

The second time includes a time corresponding to the N times of the end time of the subframe where the time window is cut off, where the N symbols are not smaller than the number of symbols occupied by the indication message.
The apparatus according to any one of claims 27 to 32, wherein said indication message is transmitted on a channel of a licensed spectrum; or

The indication message is transmitted on a channel of the unlicensed spectrum.
The apparatus according to any one of claims 27 to 33, wherein said first signal comprises one or a combination of a control channel, a data channel and a reference signal, said indication message indicating said means for transmitting a signal Transmitting the first signal at the first time in the time window; or

The first signal includes a reference signal, the indication message indicating that the device transmitting the signal transmits the first signal within the time window.
The apparatus according to any one of claims 27 to 34, wherein after acquiring the usage right of the channel, the transceiver starts transmitting the first on the channel at a first moment in the time window. The signals include:

Transmitting, by the transceiver, the reference signal from the first moment, where a time interval between the first moment and a termination time of the subframe where the first moment is located is less than a threshold; or

The transceiver sends one or a combination of a control channel and a data channel from the first moment, wherein a time interval between the first moment and a termination time of the subframe in which the first moment is located is not less than the Threshold.
The apparatus according to any one of claims 34 or 35, wherein the reference signal is a non-periodic reference signal, and the time-frequency resource of the aperiodic reference signal is pre-configured or temporarily notified in a subframe; or

The reference signal is a periodic reference signal, and a period of the periodic reference signal and a time-frequency resource of the periodic signal in a subframe are pre-configured.
The apparatus according to any one of claims 27 to 36, wherein the indication message further comprises information of a length of time and/or channel switching in which the base station continuously uses the channel.
A device for receiving a signal, comprising: a processor, a transceiver, and a buffer, wherein:

The transceiver is configured to receive a signal on an unlicensed spectrum channel;

The buffer is configured to buffer a signal on an unlicensed spectrum channel received by the transceiver, where the received and buffered signal includes a first signal sent by a base station, starting from a first time in a time window, where a signal comprising one or a combination of a control channel, a data channel, a reference signal; the transceiver receiving an indication message at a second time after the time window deadline; wherein the indication message is carried within the time window and received The buffered signal includes the first signal information;

The processor is configured to detect the first signal according to the indication message.
38. Apparatus according to claim 38 wherein there is a time interval between the cutoff time of said time window and said second time.
The apparatus according to any one of claims 38 to 39, wherein said time window comprises a length of time smaller than a time length of one subframe; or

The time window includes a length of time equal to the length of time of one subframe.
The apparatus according to any one of claims 38 to 40, wherein said time window comprises each of a plurality of time resources in two consecutive subframes.
Apparatus according to any of claims 38 to 41 wherein said second time instant comprises a predefined time instant.
The apparatus according to any one of claims 38 to 42, wherein the second time instant comprises a start time of a next subframe including a subframe in which the time window cutoff time is located; or

The second time includes a time corresponding to the N times of the end time of the subframe where the time window is cut off, where the N symbols are not smaller than the number of symbols occupied by the indication message.
The apparatus according to any one of claims 38 to 43, wherein the indication message is transmitted on a channel of the licensed spectrum; or

The indication message is transmitted on a channel of the unlicensed spectrum.
The apparatus according to any one of claims 38 to 44, wherein the signal received by the transceiver and buffered by the buffer further comprises, from a deadline of the time window to detecting the indication message. The signal between the moments.
The device according to any one of claims 38 to 45, wherein the indication message carries information including the first signal in a signal received and buffered in the time window, including:

The first signal includes one or a combination of a data channel and a control channel, the indication message carrying a first signal from a first time of the time window, and the signal received and buffered in the time window includes the first signal Information.
The device according to claim 46, wherein the processor detects the first signal according to the indication message, including:

The processor is configured to determine the first moment according to the indication message;

The processor is further configured to decode the first signal according to the first moment.
The device according to any one of claims 38 to 45, wherein the indication message carries information including the first signal in a signal received and buffered in the time window, including:

The first signal includes a reference signal carrying information including the first signal from a first time of the time window, and a signal received and buffered within the time window; or

The first signal includes a reference signal carrying information including the first signal in a signal received and buffered within the time window.
The apparatus according to claim 48, wherein the processor detects the reference signal according to information of a first moment carried in the indication message; or

The processor detects the reference signal according to the indication message.
The device according to any one of claims 38 to 45, wherein the indication message carries a first time from the time window, and the signal received and buffered in the time window includes the first Signal information;

The processor is configured to determine, according to the indication message, that the first signal includes a reference signal, where a time interval between a first moment indicated by the indication message and a termination time of a subframe where the first moment is located is less than Threshold; or

Determining, according to the indication message, that the first signal includes one or a combination of a data channel and a control channel, where the first time indicated by the indication message and the subframe where the first time is located The time interval between the end times is not less than the threshold.
The apparatus according to any one of claims 38 to 45, wherein the reference signal is an aperiodic reference signal, and the time-frequency resource of the aperiodic reference signal in the subframe is pre-configured or Temporary notice; or

The reference signal is a periodic reference signal, and a period of the periodic reference signal and a time-frequency resource of the periodic reference signal in a subframe are pre-configured.
The apparatus according to any one of claims 38 to 51, wherein said indication message further comprises information on a length of time and/or channel switching of signals continuously received on said channel.