WO2017161601A1 - Method and base station for sending a pilot signal - Google Patents

Abstract

A method and base station for sending a pilot signal, the method comprising: a first base station generating, when a criterion for sending a pilot signal is satisfied, a first downlink subframe comprising the pilot signal; and sending the first downlink subframe to a terminal. According to a method provided by an embodiment of the present application, the first base station sends, after determining that the condition for sending the pilot signal has been satisfied, the pilot signal to the terminal. The invention thereby reduces resource consumption when sending a pilot signal and improves resource utilization rate.

Description

Pilot signal transmitting method and base station Technical field

The present application relates to the field of mobile communications technologies, and in particular, to a pilot signal transmitting method and a base station.

Background technique

In mobile communication systems, due to the time-varying characteristics of wireless fading channels, there is a large amount of uncertainty in the communication process. In order to determine the quality of the channel, the base station may send a pilot signal to the terminal, so that the terminal tests the quality of the downlink channel according to the received pilot signal, obtains a channel quality indicator (CQI), and obtains CQI feedback. The base station is provided such that the base station determines the quality of the channel between the base station and the terminal.

At present, the base station needs to carry the pilot signal in the downlink subframe as long as the downlink subframe is transmitted, that is, the base station transmits the pilot signal in any scenario, for example, the base station sends the pilot signal in the periodic broadcast message; or A pilot signal or the like is transmitted in a downlink subframe in which resources are allocated to the terminal. For example, in a Time Division Long Term Evolution (TD-LTE) system, Cell-Specific Reference Singals (CRS) is an important pilot signal, and a terminal can perform channel estimation and the like according to CRS. . The CRS occupies one resource element (RE) every six subcarriers in the frequency domain, and every two to four symbols appear in the time domain. In the case of a single antenna, the CRS occupies 4 resource elements in each resource block (RB), and the CRS is across the entire system bandwidth. According to the number of transmitting antennas of the base station, the proportion of resources occupied by CRS in one downlink subframe is between 4.8% and 14.3%, and the resources occupying the channel are very large, and the resource utilization of the channel is low.

Summary of the invention

The embodiment of the present application provides a pilot signal sending method and a base station, which are used to reduce channel resources required for transmitting a pilot signal.

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

When the pilot signal transmission condition is met, the first base station generates a first downlink subframe that includes a pilot signal, and the first base station sends the first downlink subframe to the terminal.

According to the method provided by the embodiment of the present application, the first base station sends a pilot signal to the terminal after determining that the pilot signal transmission condition is satisfied, thereby reducing resources consumed by transmitting the pilot signal, and improving resource utilization.

Optionally, the pilot signal sending condition is any one of the following conditions:

Receiving, by the first base station, an access request sent by the terminal;

The first base station determines that downlink data needs to be sent to the terminal;

Receiving, by the first base station, a resource request sent by the terminal;

The first base station receives the notification message sent by the second base station, where the notification message is used to instruct the first base station to send a pilot signal to the terminal.

Optionally, it also includes:

The first base station sends pilot signal indication information to the terminal, where the pilot signal indication information includes at least one of the following information:

The configuration indication information is used to indicate whether the first downlink subframe is included in the downlink subframe sent by the first base station to the terminal;

The subframe indication information is used to indicate that the first downlink subframe is located in a downlink subframe that is sent by the first base station to the terminal;

The frequency domain location indication information is used to indicate a location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe;

The time domain location indication information is used to indicate a location of the time domain resource unit occupied by the pilot signal in the first downlink subframe;

The duration indication information is used to indicate a sum of durations of the at least one of the first downlink subframes sent by the first base station.

The pilot signal indication information may indicate to the terminal, the downlink subframe in which the pilot signal is located, the location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe, and the pilot signal in the first downlink. Information such as the location of the time domain resource unit in the frame, so that the terminal can quickly receive the pilot signal, so that the terminal can quickly determine the CQI and other information according to the pilot signal.

Optionally, the frequency domain location indication information is a bit bitmap; one bit in the bit bitmap uniquely corresponds to one frequency domain resource unit in the first downlink subframe;

When the value of one bit in the bit bitmap is a first preset value, the value of the bit indicates that the pilot signal occupies the bit corresponding to the bit in the first downlink subframe. Frequency domain resource unit.

Optionally, the configuration indication information is K consecutive bits, where K is a positive integer;

When the value of the K consecutive bits is a second preset value, the value of the K consecutive bits indicates that the first base station includes the first one in a downlink subframe sent by the terminal Downstream subframe.

Optionally, the pilot signal indication information is located in a second downlink subframe that is sent by the first base station to the terminal.

Optionally, the first downlink subframe and the second downlink subframe are the same downlink subframe;

Optionally, the first downlink subframe is located after the second downlink subframe.

Optionally, the pilot signal indication information is located in a dedicated physical layer channel in the second downlink subframe, where the dedicated physical layer channel is a preset resource block in the second downlink subframe.

Optionally, the pilot signal indication information is located in a media access control MAC layer message sent by the first base station to the terminal.

Transmitting the pilot signal indication information through the MAC layer message can reduce the consumption of physical layer resources, thereby improving resource utilization.

Optionally, the pilot signal indication information is located in a radio resource control RRC signaling sent by the first base station to the terminal.

Transmitting the pilot signal indication information through RRC signaling can reduce the consumption of physical layer resources, thereby improving resource utilization.

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

The terminal receives the first downlink subframe sent by the first base station, where the first downlink subframe is sent when the first base station determines that the pilot signal sending condition is satisfied, where the first downlink subframe The frame includes a pilot signal;

The terminal determines a channel quality indication CQI according to the pilot signal, and sends the CQI to the first base station.

According to the method provided by the embodiment of the present application, the terminal may determine the pilot signal by using the first downlink subframe sent by the first base station, so as to quickly determine the CQI.

In a third aspect, the embodiment of the present application provides a base station, including multiple function modules, for implementing any one of the pilot signal sending methods described in the foregoing first aspect, so that the base station determines that the pilot signal sending condition is satisfied. The pilot signal is sent to the terminal, thereby reducing the resources consumed by transmitting the pilot signal and improving resource utilization.

In a fourth aspect, the embodiment of the present application provides a terminal, including multiple function modules, for implementing any one of the pilot signal receiving methods described in the foregoing second aspect, including multiple function modules, so that the terminal sends according to the base station. The pilot signal determines a channel quality indication CQI and transmits the CQI to the base station.

The fifth aspect, in order to implement the foregoing method for transmitting a pilot signal, the embodiment of the present application provides a base station, where the structure of the base station includes a processor and a transceiver;

Wherein the processor is configured to:

When it is determined that the pilot signal transmission condition is satisfied, generating a first downlink subframe that includes the pilot signal;

The transceiver is configured to transmit the first downlink subframe to a terminal.

Optionally, the pilot signal sending condition is any one of the following conditions:

Receiving, by the transceiver, an access request sent by the terminal;

The processor determines that downlink data needs to be sent to the terminal;

Receiving, by the transceiver, a resource request sent by the terminal;

The transceiver receives a notification message sent by the second base station, where the notification message is used to instruct the first base station to send a pilot signal to the terminal.

Optionally, the transceiver is further configured to:

Transmitting, to the terminal, pilot signal indication information, where the pilot signal indication information includes at least one of the following information:

The configuration indication information is used to indicate whether the first downlink subframe is included in a downlink subframe that is sent by the first base station to the terminal;

The subframe indication information is used to indicate that the first downlink subframe is located in a downlink subframe that is sent by the first base station to the terminal;

The frequency domain location indication information is used to indicate a location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe;

The time domain location indication information is used to indicate a location of the time domain resource unit occupied by the pilot signal in the first downlink subframe;

The duration indication information is used to indicate a sum of durations of the at least one of the first downlink subframes sent by the first base station.

Optionally, the frequency domain location indication information is a bit bitmap; one bit in the bit bitmap uniquely corresponds to one frequency domain resource unit in the first downlink subframe;

When the value of one bit in the bit bitmap is a first preset value, the value of the bit indicates that the pilot signal occupies the bit corresponding to the bit in the first downlink subframe. Frequency domain resource unit.

Optionally, the configuration indication information is K consecutive bits, where K is a positive integer;

When the value of the K consecutive bits is a second preset value, the value of the K consecutive bits indicates that the first base station includes the first one in a downlink subframe sent by the terminal Downstream subframe.

Optionally, the transceiver is further configured to send a second downlink subframe to the terminal, where the second downlink subframe includes the pilot signal indication information.

Optionally, the first downlink subframe and the second downlink subframe are the same downlink subframe.

Optionally, the first downlink subframe is located after the second downlink subframe.

Optionally, the pilot signal indication information is located in a dedicated physical layer channel in the second downlink subframe, where the dedicated physical layer channel is a preset resource block in the second downlink subframe.

Optionally, the pilot signal indication information is located in a media access control MAC layer message sent by the base station to the terminal.

Optionally, the pilot signal indication information is located in a radio resource control RRC signaling sent by the base station to the terminal.

In a sixth aspect, in order to implement the foregoing method for receiving a pilot signal, a terminal in the embodiment of the present application includes a transceiver and a processor;

The transceiver is configured to receive a first downlink subframe sent by the first base station, where the first downlink subframe is sent when the first base station determines that a pilot signal sending condition is met, The first downlink subframe includes a pilot signal;

The processor is configured to: determine a channel quality indicator CQI based on the pilot signal,

The transceiver is further configured to transmit the CQI to the first base station.

A seventh aspect of the present invention provides a method for transmitting a pilot signal, including

The first base station generates a pilot signal and pilot signal indication information, where the pilot signal indication information is used to indicate a configuration of the pilot signal in a downlink subframe that is sent by the first base station to the terminal; The first base station transmits the pilot signal and the pilot signal indication information to the terminal.

The base station uses the pilot signal indication information to indicate the configuration of the pilot signal in the downlink subframe sent by the base station to the terminal, that is, the base station can flexibly configure the pilot signal according to requirements without using a fixed configuration pilot signal, thereby reducing the transmission of the pilot signal. The resources consumed increase resource utilization.

Optionally, the generating, by the first base station, the pilot signal includes: the first base station generating a first downlink subframe that includes a pilot signal.

Optionally, the pilot signal indication information includes at least one of the following information:

The configuration indication information is used to indicate whether the first downlink subframe is included in a downlink subframe that is sent by the first base station to the terminal;

Subframe indication information, configured to indicate that the first downlink subframe is located at the first base station to the end The position in the downlink subframe sent by the terminal;

The frequency domain location indication information is used to indicate a location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe;

The time domain location indication information is used to indicate a location of the time domain resource unit occupied by the pilot signal in the first downlink subframe;

The duration indication information is used to indicate a sum of durations of the at least one of the first downlink subframes sent by the first base station.

The frequency domain location indication information may be a bit bitmap; one bit in the bit bitmap uniquely corresponds to one frequency domain resource unit in the first downlink subframe; when the bit bitmap The value of the bit indicates that the pilot signal occupies a frequency domain resource unit corresponding to the bit in the first downlink subframe.

Optionally, the configuration indication information may be K consecutive bits, where K is a positive integer; when the values of the K consecutive bits are a second preset value, the K consecutive bits The value of the bit indicates that the first downlink subframe is included in a downlink subframe that is sent by the first base station to the terminal.

Optionally, when the pilot signal sending condition is met, the first base station sends the pilot signal indication information and the pilot signal to the terminal,

The pilot signal transmission condition is any one of the following conditions:

Receiving, by the first base station, an access request sent by the terminal;

The first base station determines that downlink data needs to be sent to the terminal;

Receiving, by the first base station, a resource request sent by the terminal;

The first base station receives the notification message sent by the second base station, where the notification message is used to instruct the first base station to send a pilot signal to the terminal.

Optionally, the pilot signal indication information is located in a second downlink subframe that is sent by the first base station to the terminal. The first downlink subframe and the second downlink subframe may be the same downlink subframe; or the first downlink subframe is located after the second downlink subframe.

Optionally, the pilot signal indication information is located in a dedicated physical layer in the second downlink subframe. a channel, wherein the dedicated physical layer channel is a preset resource block in the second downlink subframe.

Optionally, the pilot signal indication information is located in a medium access control MAC layer message or a radio resource control RRC signaling sent by the first base station to the terminal.

Transmitting the pilot signal indication information through the MAC layer message or the RRC signaling can reduce the consumption of the physical layer resources, thereby improving resource utilization.

In an eighth aspect, in order to implement the method for transmitting a pilot signal in the foregoing seventh aspect, an embodiment of the present invention provides a base station, where the base station has a function of implementing behavior of a first base station in the foregoing access method. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a possible design, the base station includes a plurality of functional modules, and is used to implement any one of the foregoing seventh methods, so that the base station uses the pilot signal indication information to indicate that the pilot signal is sent by the base station to the terminal. The configuration in the downlink subframe, that is, the base station can flexibly configure the pilot signal according to requirements without using a fixed configuration pilot signal, which reduces the resources consumed by transmitting the pilot signal and improves resource utilization.

In a possible design, the structure of the base station includes a processor and a transceiver, the processor being configured to support the base station to perform a corresponding function in the above access method. The transceiver is configured to support communication between the base station and the terminal, and send information or instructions involved in the foregoing access method to the terminal. A memory may also be included in the base station for coupling with the processor, which stores the necessary program instructions and data for the base station.

DRAWINGS

1 is a schematic diagram of a CRAN communication network;

2 is a schematic diagram of a communication network;

FIG. 3 is a schematic flowchart of a method for transmitting a pilot signal according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a pilot signal according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a pilot signal according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a terminal according to an embodiment of the present application.

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

FIG. 11 is a schematic structural diagram of a base station according to an embodiment of the present application.

detailed description

The embodiments of the present application are applicable to a 4G (fourth generation mobile communication system) evolution system, such as an LTE (Long Term Evolution) system; a 5G (fifth generation mobile communication system) system; and a CRAN (Cloud Radio Access Network) Access network) and other communication networks.

In the embodiment of the present application, the term "terminal" includes but is not limited to a mobile station, a fixed or mobile subscriber unit, a pager, a cellular phone, a Personal Digital Assistant (PDA), a computer or any other type of wireless environment. User equipment in work. The term "base station" includes but is not limited to a base station, a node, a base station controller, an access point (AP), a remote unit (RU), or any other type of interface device capable of operating in a wireless environment. .

The solution provided by the embodiment of the present application is applicable to a network such as CRAN. As shown in FIG. 1, it is a schematic diagram of a CRAN communication network. As shown in FIG. 1, CRAN can be divided into multiple CRAN clusters such as CRAN cluster 110, CRAN cluster 120, and CRAN cluster 130. Each CRAN cluster can serve multiple terminals. For example, CRAN cluster 110 serves terminal 111 and terminal 112, while CRAN cluster 120 serves terminal 121, and CRAN cluster 130 serves terminal 131. Each CRAN cluster can be divided into one or more virtual transmission points (English: Virtual Transmission Point, V-TP for short), and V-TP can be one or more transmission points (English: Transmission Point, TP for short) composition. A V-TP can be a single TP or multiple TPs for joint transmission. In general, CRAN clusters can have different numbers of V-TPs, TPs, etc., and serve a different number of terminals.

The solution provided by the embodiment of the present application is also applicable to a scenario in which a terminal switches between different cells. Specifically, as shown in FIG. 2, when the terminal 204 moves from the area covered by the base station 201 to the area covered by the base station 202, information such as the channel quality and the base station 202 needs to be quickly determined by the pilot signal. The base station 201 and the base station 202 may also cover a plurality of micro base stations 203.

In the prior art, a base station needs to transmit a pilot signal in each downlink subframe, but the terminal only needs to receive a pilot signal when performing channel measurement or channel estimation. Therefore, if the base station transmits a pilot signal in each downlink subframe, it will result in waste of resources. For example, for VoIP (Voice over Internet Protocol) service, the ratio of service duration to waiting time is 1:2. The terminal only needs to perform channel measurement or channel estimation within the service duration. Therefore, if the base station also transmits the pilot signal within the waiting time, the resource consumption is increased.

Based on the foregoing description, as shown in FIG. 3, the embodiment of the present application provides a schematic flowchart of a method for transmitting a pilot signal, including:

Step 301: When the pilot signal transmission condition is met, the first base station generates a first downlink subframe that includes the pilot signal.

Step 302: The first base station sends the first downlink subframe to a terminal.

It can be understood that the number of the first downlink subframes is at least one, that is, the first base station can generate N downlink subframes (the N is a positive integer), and the base station can simultaneously send or separately send the N subframes. A downlink subframe containing a pilot signal.

Optionally, in step 301, the first base station generates the first downlink subframe that includes the pilot signal, where the first base station generates M downlink subframes that include the N first downlink subframes, where , N is a positive integer, and N is less than or equal to M. Correspondingly, in step 302, the sending, by the first base station, the first downlink subframe to the terminal includes: the first base station transmitting, to the terminal, M downlink subframes that include the N first downlink subframes.

Specifically, when determining that the pilot signal transmission condition is satisfied, the first base station may determine, according to the pilot signal transmission condition, the number M of downlink subframes that need to be sent to the terminal, so the value of M may be determined according to actual conditions. Correspondingly, each downlink subframe of the M downlink subframes that the base station can send The pilot signal is sent in the middle, and the pilot signal is also sent in a part of the downlink subframes of the M downlink subframes, and the pilot signal is sent only in the first downlink subframe of the M downlink subframes. Therefore, the value of N can also be determined according to actual conditions, and details are not described herein again. By flexibly selecting a subframe carrying a pilot signal, transmission resources can be further saved and transmission efficiency can be improved.

It should be noted that the M downlink subframes may be M downlink subframes that are continuously transmitted, or may be M downlink subframes that are not continuously transmitted.

For the simplicity of the description, the “M downlink subframes” appearing in the embodiment of the present invention all refer to at least one downlink subframe that the first base station sends to the terminal, and “N first downlink subframes” refer to the first base station. At least one downlink subframe that includes the pilot signal, and the M downlink subframes include N first downlink subframes.

In the embodiment of the present application, the pilot signal included in the first downlink subframe may be a pilot signal used for channel measurement by the terminal; the pilot signal may be a pilot signal used for channel estimation by the terminal; The information may be a pilot signal for channel state measurement and feedback, and the terminal may determine information such as CQI, RI (rank indication), and PMI (Precoding Matrix Indicator) according to the pilot signal. And feeding back to the first base station, so that the first base station selects an appropriate resource, a code modulation mode, and the like for the terminal.

It should be noted that, in the embodiment of the present application, the first base station may determine that the pilot signal sending condition is satisfied in multiple cases, which are respectively described in detail below.

The first possible condition is that the first base station receives the access request sent by the terminal.

When the terminal needs to send uplink data, the terminal needs to establish a connection with the first base station through a random access procedure. During the random access process, the terminal needs to send an access request to the first base station, and the first base station receives the access request sent by the terminal, thereby determining that the pilot signal sending condition is satisfied.

For example, the access request sent by the terminal to the first base station is a preamble (Preamble), and after receiving the preamble sent by the terminal, the first base station determines that the first downlink that includes the pilot signal needs to be sent to the terminal. Frame, pilot signal can be used for channel quality between the first base station and the terminal The amount is estimated.

It should be noted that, under the condition, the number M of downlink subframes that the first base station sends to the terminal may be the maximum value of the number of downlink subframes that the first base station needs to send during the process of accessing the network.

The second possible condition is that the first base station determines that downlink data needs to be sent to the terminal. For example, the first base station receives downlink data sent by other base stations or other terminals to the terminal, or needs to directly send downlink data to the terminal.

It should be noted that, under the condition, the number M of downlink subframes that the first base station sends to the terminal may be determined according to the data amount of the downlink data that is sent to the terminal according to the need.

A third possible condition is that the first base station receives the resource request sent by the terminal.

The resource request sent by the first base station may be a scheduling request (Schedule Request, SR), or may be a message for requesting an uplink resource, such as a Buffer Status Reports (BSR).

After receiving the resource request, the first base station may determine the number M of downlink subframes to be sent to the terminal according to the number of uplink resources allocated to the terminal.

Optionally, the first base station sends a downlink subframe to the terminal, and uses the downlink subframe as the first downlink subframe.

The fourth possible condition is that the first base station receives the notification message sent by the second base station, and the notification message is used to instruct the first base station to send a pilot signal to the terminal.

With reference to FIG. 2, under this condition, the first base station may be a micro base station, and the second base station may be a macro base station. The first base station is located within the signal coverage of the second base station. The macro base station has the characteristics of wide signal coverage and large capacity. However, there are objects in the area where the signal is blocked (for example, a tall building), so that the signal of the macro base station cannot cover the area, and the micro base station can be arranged in the area. The micro base station has the characteristics of small coverage, small size, convenient installation, and the like, so that a complementary relationship can be formed with the macro base station.

In order to determine the channel quality between the second base station and the terminal, the second base station may send a notification message to the first base station when the terminal is located within the signal coverage of the first base station, thereby notifying the first base station to send a pilot signal to the terminal. Through the above method, the second base station can avoid using its own resources to send The pilot signal is sent, but the first base station in the coverage of the signal is notified to transmit the pilot signal to the terminal, thereby improving the resource utilization of the second base station.

Of course, the above conditions are only examples, and the pilot signal transmission conditions may have other forms, which are not described herein again.

In the embodiment of the present application, when the first base station determines that the pilot signal sending condition is met, the first base station may perform an operation of allocating an uplink resource to the terminal. The terminal may report the sequence number of the terminal by using the uplink resource allocated by the first base station, or send information such as CQI determined according to the pilot signal to the first base station by using the uplink resource allocated by the first base station.

Optionally, in the embodiment of the present application, after the first base station determines that the pilot signal needs to be sent according to the pilot signal sending condition, the first base station may send the pilot to the terminal by using at least one downlink subframe of the M downlink subframes. The signal indicates information such that the terminal quickly determines the pilot signal based on the pilot signal indication information.

After receiving the pilot signal sent by the first base station, the terminal may determine information such as CQI according to the pilot signal. It should be noted that the terminal determines how the CQI is the prior art. For details, refer to the provisions in the existing communication standards, and details are not described herein again.

In the embodiment of the present application, the pilot signal indication information sent by the first base station to the terminal may include at least one of the following information:

The subframe indication information is used to indicate that the N first downlink subframes are located in the M downlink subframes.

The frequency domain location indication information is used to indicate a location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe.

The time domain location indication information is used to indicate the location of the time domain resource unit occupied by the pilot signal in the first downlink subframe.

The configuration indication information is used to indicate whether the first downlink subframe is included in the M downlink subframes.

The duration indication information is used to indicate a sum of durations of the N first downlink subframes.

Each of the information in the pilot signal indication information is separately described below:

First, the sub-frame indication information

In the embodiment of the present application, the first base station may send the pilot signal only in a part of the downlink sub-frames of the M downlink subframes. To this end, the first base station may indicate the N first downlink sub-subframes by using the sub-frame indication information. The frame is located at a position in the M downlink subframes. The subframe indication information may be represented by a plurality of bits, each bit uniquely corresponding to one of the M downlink subframes, and when the value of the one bit is a preset value, the bit may be represented The pilot signal is included in the downlink subframe corresponding to the bit; when the value of one bit is not the preset value, it may indicate that the pilot signal is not included in the downlink subframe corresponding to the bit.

It should be noted that the correspondence between each bit and the downlink subframe may be pre-agreed by the first base station and the terminal.

For example, when the first base station determines that the pilot signal sending condition is met, it is determined that the downlink subframe needs to be sent to the terminal, and it is determined that only the pilot signal needs to be sent in the first two downlink subframes, and the preset value is 1 . At this time, the subframe indication information sent by the first base station to the terminal may be 1100, indicating that the first frame downlink subframe and the second frame downlink subframe sent by the first base station include a pilot signal, and the first base station sends the third signal. The pilot signal is not included in the frame downlink subframe and the fourth frame downlink subframe. Of course, the subframe indication information may also be in other forms, and details are not described herein again.

In this embodiment, the N first downlink subframes may be periodically configured in the M downlink subframes. For example, the first base station may send one first downlink subframe every 2 downlink subframes. Of course, the first base station may also send a pilot signal in each downlink subframe that is sent, where N and M are equal.

The first base station indicates, by using the subframe indication information, the location of all the first downlink subframes of the first downlink subframe that are sent by the first base station in the M downlink subframes, so that the terminal can be quickly located. The first downlink subframe of the pilot signal is included, thereby acquiring a pilot signal, and improving information processing efficiency.

Second, frequency domain location indication information and time domain location indication information

In the embodiment of the present application, if the location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe is a preset frequency domain resource unit, the pilot signal indication information may not include the frequency domain location indication. information. Correspondingly, if the location of the time domain resource unit occupied by the pilot signal in the first downlink subframe is a preset time domain resource unit, the time domain location indication information may not be included in the pilot signal indication information.

It should be noted that the preset frequency domain resource unit or the preset time domain resource unit refers to a frequency domain resource unit or a time domain resource unit that the first base station and the terminal pre-arrange to transmit a pilot signal.

In the embodiment of the present application, the frequency domain location indication information and the time domain location indication information may have multiple implementation forms. The location of the time domain resource unit occupied by the pilot signal in the first downlink subframe is a preset time domain resource unit, and the location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe is not For example, the preset frequency domain resource unit is used as an example. The implementation of the time domain resource unit in the first downlink subframe is not the preset time domain resource unit. Description, no longer repeat here.

In a possible implementation, the frequency domain location indication information may be a bit bitmap; one bit in the bit bitmap uniquely corresponds to one frequency domain resource unit in the first downlink subframe. When the value of one bit in the bit bitmap is a first preset value, the value of the bit indicates that the pilot signal occupies the bit corresponding to the bit in the first downlink subframe. The frequency domain resource unit; otherwise, the value of the bit indicates that the pilot signal does not occupy a frequency domain resource unit corresponding to the bit in the first downlink subframe.

It should be noted that the correspondence between each bit in the bit bitmap and the frequency domain resource unit may be pre-arranged by the first base station and the terminal, and details are not described herein again.

For example, the first preset value is 1. At this time, when the value of one bit in the bit bitmap is 1, it indicates that the pilot signal occupies the frequency domain resource unit corresponding to the bit in the first downlink subframe; one bit in the bit bitmap A value of 0 indicates that the pilot signal does not occupy the frequency domain resource unit corresponding to the bit in the first downlink subframe. Of course, the above is only an example. The first preset value may also be 0. In this case, when the value of the bit is 1, the pilot signal does not occupy the first downlink subframe corresponding to the bit. Frequency domain resource unit.

Correspondingly, the time domain location indication information may also be a bit bitmap; a ratio in the bit bitmap The special bit uniquely corresponds to one time domain resource unit in the first downlink subframe. When the value of one bit in the bit bitmap is a first preset value, the value of the bit indicates that the pilot signal occupies the bit corresponding to the bit in the first downlink subframe. The time domain resource unit; otherwise, the value of the bit indicates that the pilot signal does not occupy a time domain resource unit corresponding to the bit in the first downlink subframe.

It should be noted that the correspondence between each bit in the bit bitmap and the time domain resource unit may be pre-arranged by the first base station and the terminal, and details are not described herein again.

The position of the frequency domain resource unit and the time domain resource unit in the downlink subframe may be in various forms, which is not limited in this embodiment of the present application. For example, the pilot signal may occupy one frequency domain resource unit every y frequency domain resource units in the frequency domain, and occupy one time domain resource unit every x time domain resource units in the time domain. For example, the pilot signal may occupy one frequency domain resource unit every y frequency domain resource units in the frequency domain, and occupy (i-k+1) time domains in the i-th to kth time domain resource units in the time domain. Resource unit. Among them, y, x, i, k are all natural numbers.

In this embodiment, a time domain resource unit may be an arbitrary waveform symbol, including but not limited to an Orthogonal Frequency Division Multiplexing (OFDM) symbol, and a sparse code division multiple access (Sparse Code Multiplexing Access). SCMA) Symbol, Orthogonal Frequency Division Multiplexing (F-OFDM) symbol, Non-Orthogonal Multiple Access (NOMA) symbol, abbreviated as an arbitrary waveform symbol in the following description A symbol; a frequency domain resource unit can be one subcarrier.

For example, as shown in FIG. 4, it is a schematic diagram of a pilot signal provided by an embodiment of the present application.

In FIG. 4, in one downlink subframe, the pilot signal occupies one frequency domain resource unit every six frequency domain resource units in the frequency domain, and one time domain resource unit is occupied on the first time domain resource unit in the time domain. .

In the embodiment of the present application, the pilot signal may occupy the entire system bandwidth, or may occupy only part of the system. System bandwidth. When the pilot signal occupies part of the system bandwidth, the density of the pilot signal can be reduced, thereby reducing the occupied resource blocks, thereby improving resource utilization. Specifically, the entire system bandwidth can be divided into Q frequency bands according to the frequency, and the resource blocks occupied by the pilot signals are only located in the E frequency bands, thereby reducing the density of the pilot signals. Where Q is greater than 2 and E is less than Q.

For example, as shown in FIG. 5, it is a schematic diagram of a pilot signal provided by an embodiment of the present application.

In FIG. 5, the entire system bandwidth is divided into three frequency bands according to the frequency, and the resource blocks occupied by the pilot signals are located only in one of the frequency bands.

Third, the configuration instructions

In this embodiment, the configuration indication information in the pilot signal indication information may be K consecutive bits; if the value of the K consecutive bits is the second preset value, the base station is sent to the terminal. The M downlink subframes include the first downlink subframe; if the value of the K consecutive bits is not the second preset value, indicating the M downlinks sent by the first base station to the terminal The first downlink subframe is not included in the subframe. Where K is a positive integer.

Optionally, the configuration indication information may be used to indicate whether a pilot signal is included in a downlink subframe that includes the configuration indication information.

Optionally, the configuration indication information may also be used to indicate whether the pilot signal is included in the downlink subframe after the downlink subframe that includes the configuration indication information.

For example, the configuration indication information is 1 bit, and the second preset value is 1. At this time, when the value of the configuration indication information is 1, it indicates that the downlink subframe including the configuration indication information includes a pilot signal; when the value of the frequency domain location indication information is 0, it indicates that the downlink indication includes the configuration indication information. The pilot signal is not included in the frame.

For another example, the configuration indication information is 2 bits, and the second preset value is 11. At this time, when the value of the configuration indication information is 11, it indicates that the downlink subframe including the configuration indication information includes a pilot signal; when the value of the configuration indication information is 10 or 01 or 00, it indicates that the configuration indication information is included. The pilot signal is not included in the downlink subframe.

Optionally, in the embodiment of the present application, if the configuration indication information is included in the pilot signal indication information, but the frequency domain location indication information and the time domain location indication information are not included, the pilot signal is occupied by the downlink subframe. The domain resource unit may be a preset frequency domain resource unit, and the time domain resource unit occupied in the downlink subframe may be a preset time domain resource unit.

In the embodiment of the present application, for the convenience of description, the downlink subframe including the pilot signal indication information is referred to as a second downlink subframe, that is, the first base station sends the pilot signal indication information to the terminal by using the second downlink subframe. . Optionally, the second downlink subframe may be the first downlink subframe of the M downlink subframes sent by the first base station.

In this embodiment, the second downlink subframe may be the same downlink subframe as the first downlink subframe of the N first downlink subframes, that is, the first base station will use the pilot signal indication information and the pilot signal. The same is sent to the terminal through the same downlink subframe.

For example, when the first base station determines that the pilot signal transmission condition is satisfied, the first base station determines that the pilot signal indication information is sent in the first downlink subframe of the M downlink subframes, if the downlink subframe exists. For redundant resource elements, redundant resource elements can be used to transmit pilot signals.

Optionally, the second downlink subframe may be a different downlink subframe from the first downlink subframe of the N first downlink subframes, that is, the N first downlink subframes are in the second downlink subframe. Then, the first downlink subframe in the N first downlink subframes may be the Pth downlink subframe after the second downlink subframe, where P is a positive integer.

Fourth, duration indication information

In the embodiment of the present application, after determining that the pilot transmission condition is satisfied, the first base station determines the duration indication information according to the length of time required for the N subframes transmitted to the terminal to be transmitted, so that the terminal indicates the duration information. The downlink subframe transmitted by the first base station is received within the indicated time length. Specifically, when N=1, that is, when only one first downlink subframe is included in the M downlink subframes, the duration indication information indicates a time required to send the first downlink subframe; when N>1 When the M downlink subframes include multiple first downlink subframes, the duration indication information indicates that the first first downlink subframe is sent to the last first downlink subframe. time.

Optionally, the pilot signal indication information may be located in a dedicated physical layer channel in the second downlink subframe. The dedicated physical layer channel may be a preset resource block in the second downlink subframe; the pilot signal indication information may also be located in an existing physical layer channel in the second downlink subframe, for example, PDCCH (Physical Downlink) Channels such as a Control Channel (Physical Downlink Control Channel) and an ePDCCH (Enhanced Physical Downlink Control Channel).

Optionally, in the embodiment of the present application, the first base station may further send the pilot signal indication information to the terminal by using a MAC (Media Access Control) layer message or an RRC (Radio Resource Control) signaling. .

If the first base station sends the pilot signal indication information to the terminal by using the MAC layer message, the MAC layer message including the pilot signal indication information may be an existing MAC layer message, or may be a newly created indicator signal for transmitting the pilot signal. MAC layer message.

Correspondingly, if the first base station sends the pilot signal indication information to the terminal through the RRC signaling, the RRC signaling including the pilot signal indication information may be the existing RRC signaling, or may be newly created for transmitting the pilot. The signal indicates the RRC signaling of the information.

If the first base station sends the pilot signal indication information to the terminal through the MAC layer message or the RRC signaling, the consumption of the physical layer resources can be reduced, thereby improving resource utilization.

Finally, in step 302, the first base station sends M downlink subframes to the terminal.

After receiving the first downlink subframe, the terminal may determine CQI and the like according to the pilot signal in the first downlink subframe, and send the CQI to the first base station by using the uplink resource allocated by the first base station. information.

Optionally, if the first base station sends the first downlink subframe to the terminal according to the received notification message sent by the second base station, the terminal may send the determined CQI and the like to the second base station.

In this embodiment, if the first base station determines that the terminal does not need to send uplink data or the first base station does not need to send downlink data to the terminal, the first base station does not send the first downlink subframe that includes the pilot signal to the terminal. For example, the first base station does not receive the resource sent by the terminal within the preset time period. If so, it can be determined that the terminal no longer needs to send uplink data.

According to the method provided by the embodiment of the present application, the first base station does not send the pilot signal in each downlink subframe, but sends the first downlink including the pilot signal to the terminal when determining that the pilot signal transmission condition is satisfied. The sub-frames are arranged to avoid the need to include pilot signals in each downlink subframe transmitted to the terminal, thereby reducing resources occupied by transmitting pilot signals and improving resource utilization.

Based on the same concept, a base station is provided in the embodiment of the present invention for performing the foregoing method flow.

FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present application.

The base station includes, but is not limited to, a macro base station, a micro base station, and the like.

Referring to Figure 6, the base station includes:

The processing unit 601 is configured to generate a first downlink subframe that includes a pilot signal when the pilot signal transmission condition is met.

Specifically, the processing unit 601 may generate M downlink subframes, where the M downlink subframes include N first downlink subframes, where M and N are positive integers, and N is less than or equal to M. .

The transceiver unit 602 is configured to send the first downlink subframe to the terminal.

Specifically, the transceiver unit 602 can send, to the terminal, M downlink subframes that include the N first downlink subframes.

According to the base station provided by the embodiment of the present application, the pilot signal indication information may indicate to the terminal, the downlink subframe in which the pilot signal is located, the location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe, The information of the position of the time domain resource unit occupied by the pilot signal in the first downlink subframe, so that the terminal can quickly receive the pilot signal, so that the terminal can quickly determine the CQI and the like according to the pilot signal.

Optionally, the pilot signal sending condition is any one of the following conditions:

The transceiver unit 602 receives an access request sent by the terminal;

The processing unit 601 determines that downlink data needs to be sent to the terminal;

The transceiver unit 602 receives a resource request sent by the terminal;

The transceiver unit 602 receives a notification message sent by the second base station, where the notification message is used. Instructing the first base station to send a pilot signal to the terminal.

Of course, the above is only an example, and the pilot signal transmission condition may also be other conditions, and details are not described herein again.

Optionally, the transceiver unit 602 is further configured to:

Transmitting, to the terminal, pilot signal indication information, where the pilot signal indication information includes at least one of the following information:

The configuration indication information is used to indicate whether the first downlink subframe is included in the M downlink subframes;

The subframe indication information is used to indicate that the N first downlink subframes are located in the M downlink subframes;

The frequency domain location indication information is used to indicate a location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe;

The time domain location indication information is used to indicate a location of the time domain resource unit occupied by the pilot signal in the first downlink subframe;

The duration indication information is used to indicate a sum of durations of the N first downlink subframes.

For the specific implementation of the information included in the pilot signal indication information, reference may be made to the description in the steps 301 to 302, and details are not described herein again.

According to the base station provided by the embodiment of the present application, the pilot signal indication information may indicate to the terminal, the downlink subframe in which the pilot signal is located, the location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe, The information of the position of the time domain resource unit occupied by the pilot signal in the first downlink subframe, so that the terminal can quickly receive the pilot signal, so that the terminal can quickly determine the CQI and the like according to the pilot signal.

Optionally, the frequency domain location indication information is a bit bitmap; one bit in the bit bitmap uniquely corresponds to one frequency domain resource unit in the first downlink subframe;

When the value of one bit in the bit bitmap is a first preset value, the value of the bit indicates that the pilot signal occupies the bit corresponding to the bit in the first downlink subframe. Frequency domain resources unit.

It should be noted that the first preset value may be 0 or 1 and may be determined according to actual conditions, and details are not described herein again.

Optionally, the configuration indication information is K consecutive bits, where K is a positive integer;

When the value of the K consecutive bits is a second preset value, the value of the K consecutive bits indicates that the first downlink subframe is included in the M downlink subframes.

Correspondingly, the second preset value may be determined according to actual conditions, and details are not described herein again.

Optionally, the transceiver unit 602 is further configured to send, by the terminal, a second downlink subframe, where the second downlink subframe includes the pilot signal indication information.

Optionally, the second downlink subframe is the first downlink subframe of the M downlink subframes.

The second downlink subframe may also be the Lth downlink subframe of the M downlink subframes, and the value of L may be determined according to actual conditions, and details are not described herein again.

Optionally, the second downlink subframe may be the same downlink subframe as the first downlink subframe of the N first downlink subframes; optionally, the second downlink subframe may also be the first one of the N downlink subframes. The first downlink subframe in the downlink subframe is a different downlink subframe, that is, the N first downlink subframes are sent after the second downlink subframe. For details, refer to the related description of the method embodiment of the present invention. I will not repeat them here.

Optionally, the pilot signal indication information is located in a dedicated physical layer channel in the second downlink subframe, where the dedicated physical layer channel is a preset resource block in the second downlink subframe.

The preset resource block may be a resource block agreed in advance by the base station and the terminal.

Optionally, the pilot signal indication information is located in a media access control MAC layer message sent by the base station to the terminal.

It should be noted that the MAC layer message including the pilot signal indication information may be an existing MAC layer message, or may be a newly created MAC layer message dedicated to transmitting pilot signal indication information.

Optionally, the pilot signal indication information is located in a radio resource control RRC signaling sent by the base station to the terminal.

Correspondingly, the RRC signaling including the pilot signal indication information may be RRC signaling used in the prior art, or may be RRC signaling dedicated to transmitting pilot signal indication information.

Based on the same concept, a base station is provided in the embodiment of the present invention for performing the foregoing method flow.

FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present application.

Referring to FIG. 7, the base station includes a processor 701, a memory 702, and a transceiver 703.

Transceiver 703 can be a wired transceiver, a wireless transceiver, or a combination thereof. The wired transceiver can be, for example, an Ethernet interface. The Ethernet interface can be an optical interface, an electrical interface, or a combination thereof. The wireless transceiver can be, for example, a wireless local area network communication interface, a cellular network communication interface, or a combination thereof. The processor 701 may be a central processing unit (English: central processing unit, abbreviated: CPU), a network processor (English: network processor, abbreviation: NP) or a combination of a CPU and an NP. The processor 701 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (abbreviated as PLD), or a combination thereof. The above PLD can be a complex programmable logic device (English: complex programmable logic device, abbreviation: CPLD), field-programmable gate array (English: field-programmable gate array, abbreviation: FPGA), general array logic (English: generic array Logic, abbreviation: GAL) or any combination thereof. The memory 702 may include a volatile memory (English: volatile memory), such as a random access memory (English: random-access memory, abbreviation: RAM); the memory 702 may also include a non-volatile memory (English: non-volatile memory) ), such as read-only memory (English: read-only memory, abbreviation: ROM), flash memory (English: flash memory), hard disk (English: hard disk drive, abbreviation: HDD) or solid state drive (English: solid-state Drive, abbreviation: SSD); the memory 702 may also include a combination of the above types of memory.

Memory 702 can be used to store programs.

The processor 701 reads an instruction corresponding to the program from the memory 702, and performs the following operations:

When the pilot signal transmission condition is satisfied, a first downlink subframe including the pilot signal is generated.

Specifically, the processor 701 may generate M downlink subframes, where the M downlink subframes include N first downlink subframes, where M and N are positive integers, and N is less than or Equal to M;

The first downlink subframe is sent to the terminal by the transceiver 703.

Specifically, the transceiver 703 may send, to the terminal, M downlink subframes including the foregoing N first downlink subframes.

According to the apparatus provided by the embodiment of the present application, when determining that the pilot signal transmission condition is satisfied, only N first downlink subframes of the M downlink subframes transmitted to the terminal include a pilot signal, thereby avoiding all the transmission to the terminal. The pilot signal needs to be included in the downlink subframe, thereby reducing the resources occupied by the pilot signal and improving resource utilization.

Optionally, the pilot signal sending condition is any one of the following conditions:

The transceiver 703 receives an access request sent by the terminal;

The processor 701 determines that downlink data needs to be sent to the terminal;

The transceiver 703 receives a resource request sent by the terminal;

The transceiver 703 receives the notification message sent by the second base station, where the notification message is used to instruct the first base station to send a pilot signal to the terminal.

It should be noted that the above is only an example, and the conditions for transmitting the pilot signal may also be other conditions, and details are not described herein again.

Optionally, the transceiver 703 sends the pilot signal indication information to the terminal, where the pilot signal indication information includes at least one of the following information:

The configuration indication information is used to indicate whether the first downlink subframe is included in the M downlink subframes.

The subframe indication information is used to indicate that the N first downlink subframes are located in the M downlink subframes;

The frequency domain location indication information is used to indicate a location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe;

The time domain location indication information is used to indicate a location of the time domain resource unit occupied by the pilot signal in the first downlink subframe;

The duration indication information is used to indicate a sum of durations of the N first downlink subframes.

For the specific implementation of the information included in the pilot signal indication information, reference may be made to the description in the steps 301 to 302, and details are not described herein again.

According to the base station provided by the embodiment of the present application, the pilot signal indication information may indicate to the terminal, the downlink subframe in which the pilot signal is located, the location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe, The information of the position of the time domain resource unit occupied by the pilot signal in the first downlink subframe, so that the terminal can quickly receive the pilot signal, so that the terminal can quickly determine the CQI and the like according to the pilot signal.

Optionally, the frequency domain location indication information is a bit bitmap; one bit in the bit bitmap uniquely corresponds to one frequency domain resource unit in the first downlink subframe;

When the value of one bit in the bit bitmap is a first preset value, the value of the bit indicates that the pilot signal occupies the bit corresponding to the bit in the first downlink subframe. Frequency domain resource unit.

It should be noted that the first preset value may be 0 or 1 and may be determined according to actual conditions, and details are not described herein again.

Optionally, the configuration indication information is K consecutive bits, where K is a positive integer;

When the value of the K consecutive bits is a second preset value, the value of the K consecutive bits indicates that the first downlink subframe is included in the M downlink subframes.

Correspondingly, the second preset value may be determined according to actual conditions, and details are not described herein again.

Optionally, the transceiver 703 is further configured to send a second downlink subframe to the terminal, where the second downlink subframe includes the pilot signal indication information.

Optionally, the second downlink subframe is the first downlink subframe of the M downlink subframes.

The second downlink subframe may also be the Lth downlink subframe of the M downlink subframes, and the value of L may be determined according to actual conditions, and details are not described herein again.

Optionally, the second downlink subframe may be the same downlink subframe as the first downlink subframe of the N first downlink subframes; optionally, the second downlink subframe may also be the first one of the N downlink subframes. The first downlink subframe in the downlink subframe is a different downlink subframe, that is, the N first downlink subframes are sent after the second downlink subframe. For details, refer to the related description of the method embodiment of the present invention. I will not repeat them here.

Optionally, the pilot signal indication information is located in a dedicated physical layer channel in the second downlink subframe, where the dedicated physical layer channel is a preset resource block in the second downlink subframe.

The preset resource block may be a resource block agreed in advance by the first base station and the terminal.

Optionally, the pilot signal indication information is located in a media access control MAC layer message sent by the base station to the terminal.

It should be noted that the MAC layer message including the pilot signal indication information may be an existing MAC layer message, or may be a newly created MAC layer message dedicated to transmitting pilot signal indication information.

According to the apparatus provided in this embodiment of the present application, the signaling of the pilot signal by using the MAC layer message can reduce the consumption of physical layer resources, thereby improving resource utilization.

Optionally, the pilot signal indication information is located in a radio resource control RRC signaling sent by the base station to the terminal.

Correspondingly, the RRC signaling including the pilot signal indication information may be the existing RRC signaling, or may be a newly created RRC signaling dedicated to transmitting the pilot signal indication information.

According to the apparatus provided in this embodiment of the present application, the pilot signal indication information is sent through RRC signaling, which can reduce the consumption of physical layer resources, thereby improving resource utilization.

Wherein, the bus may also be included in FIG. 7, and the bus may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by the processor and various circuits of the memory represented by the memory. The bus can also link various other circuits such as peripherals, voltage regulators, and power management circuits, and will not be further described in this application. The transceiver provides means for communicating with various other devices on a transmission medium. The processor is responsible for managing the bus architecture and the usual processing, and the memory can store the data that the processor uses when performing operations.

Based on the same concept, a terminal is provided in the embodiment of the present invention.

FIG. 8 is a schematic structural diagram of a terminal provided by an embodiment of the present application.

Referring to Figure 8, the terminal includes:

The transceiver unit 801 is configured to receive a first downlink subframe that is sent by the first base station, where the first downlink subframe is sent when the first base station determines that a pilot signal sending condition is met, where the first The downlink subframe includes a pilot signal.

Specifically, the transceiver unit 801 can obtain N first downlink subframes from the M downlink subframes sent by the base station; where M and N are positive integers, and N is less than or equal to M.

The processing unit 802 is configured to determine a channel quality indicator CQI according to the pilot signal.

The transceiver unit 801 is further configured to send the CQI to the first base station.

Optionally, the pilot signal sending condition is any one of the following conditions:

Receiving, by the first base station, an access request sent by the terminal;

The first base station determines that downlink data needs to be sent to the terminal;

Receiving, by the first base station, a resource request sent by the terminal;

The first base station receives the notification message sent by the second base station, where the notification message is used to instruct the first base station to send a pilot signal to the terminal.

Optionally, the transceiver unit 801 is specifically configured to:

Receiving, by the first base station, pilot signal indication information, where the pilot signal indication information includes at least one of the following information:

The configuration indication information is used to indicate whether the pilot signal is configured in the downlink subframe.

The subframe indication information is used to indicate that the N first downlink subframes are located in the M downlink subframes;

The frequency domain location indication information is used to indicate a location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe;

The time domain location indication information is used to indicate a location of the time domain resource unit occupied by the pilot signal in the first downlink subframe;

The duration indication information is used to indicate a sum of durations of the N first downlink subframes.

Optionally, the frequency domain location indication information is a bit bitmap; one bit in the bit bitmap uniquely corresponds to one frequency domain resource unit in the first downlink subframe;

When the value of one bit in the bit bitmap is a first preset value, the value of the bit indicates that the pilot signal occupies the bit corresponding to the bit in the first downlink subframe. Frequency domain resource unit.

Optionally, the configuration indication information is K consecutive bits, where K is a positive integer;

When the value of the K consecutive bits is a second preset value, the value of the K consecutive bits indicates that the first downlink subframe is included in the M downlink subframes.

Optionally, the pilot signal indication information is located in a second downlink subframe that is sent by the first base station to the terminal.

Optionally, the second downlink subframe is the first downlink subframe of the M downlink subframes.

Optionally, the second downlink subframe may be the same downlink subframe as the first downlink subframe of the N first downlink subframes; optionally, the second downlink subframe may also be the first one of the N downlink subframes. The first downlink subframe in the downlink subframe is a different downlink subframe, that is, the N first downlink subframes are sent after the second downlink subframe. For details, refer to the related description of the method embodiment of the present invention. I will not repeat them here.

Optionally, the pilot signal indication information is located in a dedicated physical layer channel in the second downlink subframe, where the dedicated physical layer channel is a preset resource block in the second downlink subframe.

Optionally, the pilot signal indication information is located in a media access control MAC layer message sent by the first base station to the terminal.

Optionally, the pilot signal indication information is located in a radio resource control RRC signaling sent by the first base station to the terminal.

Based on the same concept, a terminal is provided in the embodiment of the present invention.

FIG. 9 is a schematic structural diagram of a terminal provided by an embodiment of the present application.

Referring to FIG. 9, the terminal includes a processor 901, a memory 902, and a transceiver 903.

Transceiver 903 can be a wired transceiver, a wireless transceiver, or a combination thereof. Wired transceivers such as Can be an Ethernet interface. The Ethernet interface can be an optical interface, an electrical interface, or a combination thereof. The wireless transceiver can be, for example, a wireless local area network communication interface, a cellular network communication interface, or a combination thereof. The processor 901 can be a central processor, a network processor or a combination of a CPU and an NP. The processor 901 may further include a hardware chip. The hardware chip described above may be an application specific integrated circuit, a programmable logic device, or a combination thereof. The PLD may be a complex programmable logic device, a field programmable gate array, a general array logic, or any combination thereof. The memory 902 can include volatile memory, such as random access memory; the memory 902 can also include non-volatile memory, such as read only memory, flash memory, hard disk or solid state hard disk; the memory 902 can also include memory of the kind described above. combination.

Memory 902 can be used to store programs.

The processor 901 reads an instruction corresponding to the program from the memory 902, and performs the following operations:

Receiving, by the transceiver 903, a first downlink subframe sent by the first base station, where the first downlink subframe is sent when the first base station determines that a pilot signal sending condition is satisfied, where the first The downlink subframe includes a pilot signal;

Specifically, the transceiver 901 can obtain N first downlink subframes from the M downlink subframes sent by the base station; where M and N are positive integers, and N is less than or equal to M.

Determining a channel quality indicator CQI according to the pilot signal;

The CQI is transmitted to the first base station by the transceiver 903.

For a detailed description of the functions of the device or device in the terminal, reference may be made to the related content of other embodiments of the present invention, and no further details are provided herein.

Wherein, the bus may also be included in FIG. 9, and the bus may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by the processor and various circuits of the memory represented by the memory. The bus can also link various other circuits such as peripherals, voltage regulators, and power management circuits, and will not be further described in this application. The transceiver provides means for communicating with various other devices on a transmission medium. The processor is responsible for managing the bus architecture and In normal processing, the memory can store the data that the processor uses when performing operations.

It will be apparent to those skilled in the art that the description of the embodiments of the present invention can be referred to each other. For the convenience and brevity of the description, the functions and steps of the devices and devices provided by the embodiments of the present invention may be Reference is made to the related description of the method embodiment of the present invention, and details are not described herein.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, or a computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. A device that implements the functions specified in one or more processes and/or block diagrams of one or more blocks of the flowchart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. A device implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of a flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in a block or blocks of a flow or a flow and/or a block diagram of a flowchart Step.

While the preferred embodiment of the present application has been described, it will be apparent that those skilled in the art can make further changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

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

The method includes steps S1001-S1002:

S1001: The first base station generates a pilot signal and pilot signal indication information, where the pilot signal indication information is used to indicate a configuration of the pilot signal in a downlink subframe that is sent by the first base station to a terminal.

The configuration of the pilot signal in the downlink subframe that is sent by the first base station to the terminal includes a time domain resource or a frequency domain resource that the pilot signal occupies in the downlink subframe, and the pilot signal is in the downlink subframe. Various types of configuration information such as the sending location.

It should be noted that, in the embodiment of the present invention, the sequence of generating the pilot signal and the pilot signal indication information by the first base station is not limited, for example, the first base station may simultaneously generate the pilot signal and the pilot signal indication information; A base station may also generate a pilot signal by using the pilot signal indication information, that is, first complete the configuration of the pilot signal, such as time domain resource configuration and frequency domain resource configuration, and then generate a pilot signal according to the configuration.

Optionally, the generating, by the first base station, the pilot signal includes: the first base station generating a first downlink subframe that includes a pilot signal. The first downlink subframe may be one or more downlink subframes in the downlink subframe that the first base station sends to the terminal. Correspondingly, the pilot signal indication information may indicate a configuration of the first downlink subframe in a downlink subframe that is sent by the first base station to the terminal, including a location, a time domain resource, or a frequency domain of the first downlink subframe. Resource configuration, etc.

S1002: The first base station sends the pilot signal and the pilot signal indication information to the terminal.

Optionally, the pilot signal indication information is located in a second downlink subframe that is sent by the first base station to the terminal. The first downlink subframe and the second downlink subframe may be the same downlink subframe; or the first downlink subframe is located after the second downlink subframe.

For a detailed description of the second downlink subframe, refer to the related description of other embodiments of the present invention, and no further details are provided herein.

It should be noted that, in the embodiment of the present invention, the sequence of transmitting the pilot signal and the pilot signal indication information by the first base station is not limited. If the pilot signal and the pilot signal indication information are in the same downlink subframe, for example, the first downlink subframe including the pilot signal and the second downlink subframe including the pilot signal indication information are the same downlink subframe, The first base station sends the downlink subframe to the terminal, that is, the first base station simultaneously transmits the pilot signal and the pilot signal indication information; if the pilot signal and the pilot signal indication information are located in different downlink subframes, for example, including the pilot. After the first downlink subframe of the signal is located in the second downlink subframe that includes the pilot signal indication information, the first base station sends the second downlink subframe to the terminal, and then sends the first downlink subframe, that is, the pilot signal. Sent after the pilot signal indicates the information.

Optionally, the pilot signal indication information includes at least one of the following information:

The configuration indication information is used to indicate whether the first downlink subframe is included in a downlink subframe that is sent by the first base station to the terminal.

Optionally, the configuration indication information may be K consecutive bits, where K is a positive integer; when the values of the K consecutive bits are a second preset value, the K consecutive bits The value of the bit indicates that the first downlink subframe is included in a downlink subframe that is sent by the first base station to the terminal.

The subframe indication information is used to indicate that the first downlink subframe is located in a downlink subframe that is sent by the first base station to the terminal.

The frequency domain location indication information is used to indicate a location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe.

Optionally, the frequency domain location indication information may be a bit bitmap; one bit in the bit bitmap uniquely corresponds to one frequency domain resource unit in the first downlink subframe; when the bit When the value of one bit in the bitmap is the first preset value, the value of the bit indicates the pilot signal The number occupies a frequency domain resource unit corresponding to the bit in the first downlink subframe.

The time domain location indication information is used to indicate the location of the time domain resource unit occupied by the pilot signal in the first downlink subframe.

The duration indication information is used to indicate a sum of durations of the at least one of the first downlink subframes sent by the first base station.

For a detailed description of the above-mentioned various types of pilot signal indication information, reference may be made to related content of other embodiments of the present invention, and details are not described herein.

Optionally, the pilot signal indication information is located in a dedicated physical layer channel in the second downlink subframe, where the dedicated physical layer channel is a preset resource block in the second downlink subframe, detailed The content may refer to related descriptions of other embodiments of the present invention, and details are not described herein.

Optionally, the pilot signal indication information is located in a MAC layer message or RRC signaling sent by the first base station to the terminal. The MAC layer message or the RRC signaling may be a MAC layer message or RRC signaling used in the prior art, or may be a MAC layer message or RRC signaling newly designed to specifically carry the pilot signal indication information, and the embodiment of the present invention This is not specifically limited. Transmitting the pilot signal indication information through the MAC layer message or the RRC signaling can reduce the consumption of the physical layer resources, thereby improving resource utilization.

Optionally, when the pilot signal sending condition is met, the first base station sends the pilot signal indication information and the pilot signal to the terminal, where the pilot signal sending condition is any one of the following conditions:

Receiving, by the first base station, an access request sent by the terminal; the first base station determines that the downlink data needs to be sent to the terminal; the first base station receives the resource request sent by the terminal; and the first base station receives the notification message sent by the second base station, where the notification is sent. The message is used to instruct the first base station to send a pilot signal to the terminal.

The base station can determine the configuration manner of transmitting the pilot signal and the pilot signal according to the above-mentioned pilot signal transmission condition. For a detailed description of the conditions for the transmission of the pilot signals, reference may be made to the related content of other embodiments of the present invention, and details are not described herein.

According to the method for transmitting a pilot signal provided by the embodiment of the present invention, the base station uses the pilot signal indication information to indicate the configuration of the pilot signal in the downlink subframe that the base station sends to the terminal, that is, the base station can The flexible configuration of the pilot signal does not require the use of a fixed configuration of the pilot signal, which reduces the resources consumed by transmitting the pilot signal, improves resource utilization, and is applicable to various communication scenarios in which pilot signals need to be transmitted.

FIG. 11 is a schematic structural diagram of a base station according to an embodiment of the present invention. The base station has a function for implementing the pilot transmission method shown in FIG. 10. For a detailed description of the functions of the base station, reference may be made to the method steps of the embodiment shown in FIG. The related content of other embodiments of the present invention is briefly described in this embodiment.

The base station includes: a processing unit 1101, configured to generate a pilot signal and pilot signal indication information, where the pilot signal indication information is used to indicate a downlink of the pilot signal sent by the first base station to a terminal The configuration in the frame.

The transceiver unit 1102 is configured to send the pilot signal and the pilot signal indication information to the terminal.

Optionally, the processing unit 1101 is configured to generate a first downlink subframe that includes a pilot signal.

Optionally, the pilot signal indication information includes at least one of the following information:

The configuration indication information is used to indicate whether the first downlink subframe is included in a downlink subframe that is sent by the first base station to the terminal;

The subframe indication information is used to indicate that the first downlink subframe is located in a downlink subframe that is sent by the first base station to the terminal;

The frequency domain location indication information is used to indicate a location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe;

The time domain location indication information is used to indicate a location of the time domain resource unit occupied by the pilot signal in the first downlink subframe;

The duration indication information is used to indicate a sum of durations of the at least one of the first downlink subframes sent by the first base station.

Optionally, the pilot signal indication information is located in a second downlink subframe that is sent by the base station to the terminal. The first downlink subframe and the second downlink subframe may be the same downlink. a subframe; or, the first downlink subframe is located after the second downlink subframe.

Optionally, the pilot signal indication information is located in a dedicated physical layer channel in the second downlink subframe, where the dedicated physical layer channel is a preset resource block in the second downlink subframe.

Optionally, the pilot signal indication information is located in a MAC layer message or RRC signaling sent by the first base station to the terminal.

Optionally, when the pilot signal transmission condition is met, the first base station sends the pilot signal indication information and the pilot signal to the terminal.

The pilot signal transmission condition may be any one of the following conditions:

The transceiver unit 1102 receives the access request sent by the terminal; the processing unit 1101 determines that the downlink data needs to be sent to the terminal; the transceiver unit 1102 receives the resource request sent by the terminal; and the transceiver unit 1102 receives the notification message sent by the second base station, where the notification is received. The message is used to instruct the base station to send a pilot signal to the terminal.

In another embodiment of the present invention, in hardware implementation, the function of the transceiver unit 802 can be performed by a transceiver, and the processing unit 801 can be embedded as a function module in hardware or independent of the processor of the base station. It can also be stored in the memory of the base station in software form, so that the processor calls to perform the operations corresponding to the above respective modules.

The base station provided by the embodiment of the present invention uses the pilot signal indication information to indicate the configuration of the pilot signal in the downlink subframe sent by the base station to the terminal, that is, the base station can flexibly configure the pilot signal according to requirements without using the fixed configuration pilot. The signal reduces the resources consumed by transmitting the pilot signal, improves the resource utilization, and is applicable to various communication scenarios that need to transmit pilot signals.

Claims (38)

A method for transmitting a pilot signal, comprising: When the pilot signal transmission condition is met, the first base station generates a first downlink subframe that includes the pilot signal; The first base station sends the first downlink subframe to the terminal. The method according to claim 1, wherein said pilot signal transmission condition is any one of the following conditions: Receiving, by the first base station, an access request sent by the terminal; The first base station determines that downlink data needs to be sent to the terminal; Receiving, by the first base station, a resource request sent by the terminal; The first base station receives the notification message sent by the second base station, where the notification message is used to instruct the first base station to send a pilot signal to the terminal. The method of claim 1 or 2, wherein the method further comprises: The first base station sends pilot signal indication information to the terminal, where the pilot signal indication information includes at least one of the following information: The configuration indication information is used to indicate whether the first downlink subframe is included in a downlink subframe that is sent by the first base station to the terminal; The subframe indication information is used to indicate that the first downlink subframe is located in a downlink subframe that is sent by the first base station to the terminal; The frequency domain location indication information is used to indicate a location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe; The time domain location indication information is used to indicate a location of the time domain resource unit occupied by the pilot signal in the first downlink subframe; The duration indication information is used to indicate a sum of durations of the at least one of the first downlink subframes sent by the first base station. The method of claim 3 wherein said frequency domain location indication information is a ratio a bitmap; one bit in the bit bitmap uniquely corresponding to one frequency domain resource unit in the first downlink subframe; When the value of one bit in the bit bitmap is a first preset value, the value of the bit indicates that the pilot signal occupies the bit corresponding to the bit in the first downlink subframe. Frequency domain resource unit. The method according to claim 3, wherein said configuration indication information is K consecutive bits, wherein K is a positive integer; When the value of the K consecutive bits is a second preset value, the value of the K consecutive bits indicates that the first base station includes the first one in a downlink subframe sent by the terminal Downstream subframe. The method according to any one of claims 3 to 5, wherein the pilot signal indication information is located in a second downlink subframe that is sent by the first base station to the terminal. The method of claim 6, wherein the first downlink subframe and the second downlink subframe are the same downlink subframe; or The first downlink subframe is located after the second downlink subframe. The method according to claim 6, wherein the pilot signal indication information is located in a dedicated physical layer channel in the second downlink subframe, wherein the dedicated physical layer channel is the second downlink sub The default resource block in the frame. The method according to any one of claims 3 to 6, wherein the pilot signal indication information is located in a medium access control MAC layer message sent by the first base station to the terminal. The method according to any one of claims 3 to 6, wherein the pilot signal indication information is located in radio resource control RRC signaling sent by the first base station to the terminal. A base station, comprising: a processing unit, configured to: when the pilot signal sending condition is met, generate a first downlink subframe that includes a pilot signal; And a transceiver unit, configured to send the first downlink subframe to the terminal. The base station according to claim 11, wherein said pilot signal transmission condition is any one of the following conditions: Receiving, by the transceiver unit, an access request sent by the terminal; The processing unit determines that downlink data needs to be sent to the terminal; The transceiver unit receives a resource request sent by the terminal; The transceiver unit receives a notification message sent by the second base station, where the notification message is used to instruct the base station to send a pilot signal to the terminal. The base station according to claim 11 or 12, wherein the transceiver unit is further configured to: Transmitting, to the terminal, pilot signal indication information, where the pilot signal indication information includes at least one of the following information: The configuration indication information is used to indicate whether the first downlink subframe is included in a downlink subframe that is sent by the first base station to the terminal; The subframe indication information is used to indicate that the first downlink subframe is located in a downlink subframe that is sent by the first base station to the terminal; The frequency domain location indication information is used to indicate a location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe; The time domain location indication information is used to indicate a location of the time domain resource unit occupied by the pilot signal in the first downlink subframe; The duration indication information is used to indicate a sum of durations of the at least one of the first downlink subframes sent by the first base station. The base station according to claim 13, wherein the frequency domain location indication information is a bit bitmap; one bit in the bit bitmap and one frequency domain resource in the first downlink subframe Unit unique correspondence; When the value of one bit in the bit bitmap is a first preset value, the value of the bit indicates that the pilot signal occupies the bit corresponding to the bit in the first downlink subframe. Frequency domain resources unit. The base station according to claim 13, wherein the configuration indication information is K consecutive bits, where K is a positive integer; When the value of the K consecutive bits is a second preset value, the value of the K consecutive bits indicates that the first base station includes the first one in a downlink subframe sent by the terminal Downstream subframe. The base station according to any one of claims 13 to 15, wherein the transceiver unit is further configured to send a second downlink subframe to the terminal, where the second downlink subframe includes the pilot signal indication information . The base station according to claim 16, wherein the first downlink subframe and the second downlink subframe are the same downlink subframe; or The first downlink subframe is located after the second downlink subframe. The base station according to claim 16, wherein the pilot signal indication information is located in a dedicated physical layer channel in the second downlink subframe, wherein the dedicated physical layer channel is the second downlink sub The default resource block in the frame. The base station according to any one of claims 13 to 16, wherein the pilot signal indication information is located in a medium access control MAC layer message sent by the base station to the terminal. The base station according to any one of claims 13 to 16, wherein the pilot signal indication information is located in a radio resource control RRC signaling sent by the base station to the terminal. A method for transmitting a pilot signal, comprising: The first base station generates a pilot signal and pilot signal indication information, where the pilot signal indication information is used to indicate a configuration of the pilot signal in a downlink subframe that is sent by the first base station to the terminal; The first base station sends the pilot signal and the pilot signal indication information to a terminal. The method according to claim 21, wherein the generating, by the first base station, a pilot signal comprises: The first base station generates a first downlink subframe that includes a pilot signal. The method according to claim 22, wherein the pilot signal indication information includes at least one of the following information: The configuration indication information is used to indicate whether the first downlink subframe is included in a downlink subframe that is sent by the first base station to the terminal; The subframe indication information is used to indicate that the first downlink subframe is located in a downlink subframe that is sent by the first base station to the terminal; The frequency domain location indication information is used to indicate a location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe; The time domain location indication information is used to indicate a location of the time domain resource unit occupied by the pilot signal in the first downlink subframe; The duration indication information is used to indicate a sum of durations of the at least one of the first downlink subframes sent by the first base station. The method according to any one of claims 21 to 23, when the pilot signal transmission condition is satisfied, the first base station transmits the pilot signal indication information and the pilot signal to the terminal, The pilot signal transmission condition is any one of the following conditions: Receiving, by the first base station, an access request sent by the terminal; The first base station determines that downlink data needs to be sent to the terminal; Receiving, by the first base station, a resource request sent by the terminal; The first base station receives the notification message sent by the second base station, where the notification message is used to instruct the first base station to send a pilot signal to the terminal. The method according to claim 23, wherein the frequency domain position indication information is a bit bitmap; one bit in the bit bitmap and one frequency domain resource in the first downlink subframe Unit unique correspondence; When the value of one bit in the bit bitmap is a first preset value, the value of the bit indicates that the pilot signal occupies the bit corresponding to the bit in the first downlink subframe. Frequency domain resources unit. The method according to claim 23, wherein said configuration indication information is K consecutive bits, wherein K is a positive integer; When the value of the K consecutive bits is a second preset value, the value of the K consecutive bits indicates that the first base station includes the first one in a downlink subframe sent by the terminal Downstream subframe. The method according to any one of claims 22 to 26, wherein the pilot signal indication information is located in a second downlink subframe that is sent by the first base station to the terminal. The method according to claim 27, wherein the first downlink subframe and the second downlink subframe are the same downlink subframe; or The first downlink subframe is located after the second downlink subframe. The method according to claim 27, wherein the pilot signal indication information is located in a dedicated physical layer channel in the second downlink subframe, wherein the dedicated physical layer channel is the second downlink sub The default resource block in the frame. A base station, comprising: a processing unit, configured to generate a pilot signal and pilot signal indication information, where the pilot signal indication information is used to indicate a configuration of the pilot signal in a downlink subframe that is sent by the first base station to a terminal; And a transceiver unit, configured to send the pilot signal and the pilot signal indication information to the terminal. The base station according to claim 30, wherein said processing unit is configured to: A first downlink subframe including a pilot signal is generated. The base station according to claim 31, wherein the pilot signal indication information includes at least one of the following information: The configuration indication information is used to indicate whether the first downlink subframe is included in a downlink subframe that is sent by the first base station to the terminal; Subframe indication information, configured to indicate that the first downlink subframe is located at the first base station to the end The position in the downlink subframe sent by the terminal; The frequency domain location indication information is used to indicate a location of the frequency domain resource unit occupied by the pilot signal in the first downlink subframe; The time domain location indication information is used to indicate a location of the time domain resource unit occupied by the pilot signal in the first downlink subframe; The duration indication information is used to indicate a sum of durations of the at least one of the first downlink subframes sent by the first base station. The base station according to any one of claims 30 to 32, when the pilot signal transmission condition is satisfied, the first base station transmits the pilot signal indication information and the pilot signal to the terminal, The pilot signal transmission condition is any one of the following conditions: Receiving, by the transceiver unit, an access request sent by the terminal; The processing unit determines that downlink data needs to be sent to the terminal; The transceiver unit receives a resource request sent by the terminal; The transceiver unit receives a notification message sent by the second base station, where the notification message is used to instruct the base station to send a pilot signal to the terminal. The base station according to claim 32, wherein the frequency domain location indication information is a bit bitmap; one bit in the bit bitmap and one frequency domain resource in the first downlink subframe Unit unique correspondence; When the value of one bit in the bit bitmap is a first preset value, the value of the bit indicates that the pilot signal occupies the bit corresponding to the bit in the first downlink subframe. Frequency domain resource unit. The base station according to claim 32, wherein the configuration indication information is K consecutive bits, where K is a positive integer; When the value of the K consecutive bits is a second preset value, the value of the K consecutive bits indicates that the first base station includes the first one in a downlink subframe sent by the terminal Downstream subframe. The base station according to any one of claims 31 to 35, wherein the pilot signal indication information is located in a second downlink subframe that is sent by the base station to the terminal. The base station according to claim 36, wherein the first downlink subframe and the second downlink subframe are the same downlink subframe; or The first downlink subframe is located after the second downlink subframe. The base station according to claim 36, wherein the pilot signal indication information is located in a dedicated physical layer channel in the second downlink subframe, wherein the dedicated physical layer channel is the second downlink sub The default resource block in the frame.

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