CN109479265A

CN109479265A - Communication means, base station and system

Info

Publication number: CN109479265A
Application number: CN201680087527.XA
Authority: CN
Inventors: 王曼; 邓天乐; 胡星星
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-08-12
Filing date: 2016-08-12
Publication date: 2019-03-15
Anticipated expiration: 2036-08-12
Also published as: WO2018027943A1; CN109479265B

Abstract

A kind of communication means, base station and system, including, first base station determines that pilot signal indicates information, wherein pilot signal instruction information is used to indicate the position of pilot signal that the second base station is sent to terminal in downlink subframe；The first base station sends the pilot signal to terminal and indicates information.According to method provided by the embodiments of the present application, first base station has determined after the pilot signal instruction information of the second base station pilot signal transmitted, pilot signal instruction information is sent to terminal, so that in the case where the second base station and terminal are not connected or connect bad by the channel quality between first base station auxiliary the second base station of terminal check and terminal, so that terminal quickly determines the information such as the occupied running time-frequency resource of pilot signal of the second base station transmission, improve efficiency and accuracy that terminal receives the pilot signal that the second base station is sent, to the quality of channel between the second base station of quick obtaining and terminal, by improving channel quality, improve system throughput.

Description

Communication means, base station and system

Technical field

This application involves mobile communication technology field more particularly to a kind of communication means, base station and system.

Background technique

In mobile communication system, due to wireless fading channel time-varying the characteristics of, so that communication process has a large amount of uncertainty.In order to determine the quality of channel, it base station can be to terminal pilot signal transmitted, so that terminal is tested according to quality of the pilot signal received to down channel, obtain channel quality instruction (Channel Quality Indicator, CQI) and by the CQI feedback of acquisition to base station, so that base station determines the quality of channel between base station and terminal.

At present, after the pilot signal transmitted of base station, terminal can not determine the information such as the occupied running time-frequency resource of pilot signal that base station is sent in advance, to need just receive pilot signal by the long period, to need just to can determine that the quality of channel between base station and terminal by the long period, system effectiveness is reduced.

Summary of the invention

The embodiment of the present application provides a kind of communication means, base station and system, and the efficiency of the quality of channel between base station and terminal is determined to improve terminal.

In a first aspect, the embodiment of the present application provides a kind of communication means, comprising:

First base station determines that pilot signal indicates information, wherein pilot signal instruction information is used to indicate the position of pilot signal that the second base station is sent to terminal in downlink subframe；

The first base station sends the pilot signal to the terminal and indicates information.

According to method provided by the embodiments of the present application, first base station has determined after the pilot signal instruction information of the second base station pilot signal transmitted, pilot signal instruction information is sent to terminal, it may be implemented to assist the channel quality between the second base station of terminal check and terminal by first base station in the case where the second base station and terminal are not connected or connect bad, so that terminal quickly determines the information such as the occupied running time-frequency resource of pilot signal of the second base station transmission, the effect that terminal receives the pilot signal that the second base station is sent is improved Rate and accuracy, so that the quality of channel improves system throughput by improving channel quality between the second base station of quick obtaining and terminal.

Optionally, the method also includes:

The first base station receives the pilot tone instruction request message that the terminal is sent, and the pilot tone instruction request message is for requesting the first base station to send the pilot signal instruction information to the terminal.

Optionally, the method also includes:

The first base station receives the pilot signal request message that the terminal is sent, and the pilot signal request message is for requesting the first base station to indicate that second base station sends the pilot signal to the terminal.

Pass through the above method, first base station can be after the pilot signal request message for receiving terminal transmission, indicate the second base station to terminal pilot signal transmitted, can to avoid between terminal and the second base station due to bad channel quality, cause to connect between terminal and the second base station it is bad in the case where, terminal can not indicate that second terminal is sent to it pilot signal.

Optionally, include at least one of following information in the pilot signal request message:

Cell indicates information, is used to indicate the second base station pilot signal transmitted in the cell of cell instruction information instruction；

Data cell indicates information, is used to indicate the second base station and uses the data cell pilot signal transmitted of data cell instruction information instruction；

Wave beam indicates information, is used to indicate the second base station and uses the wave beam pilot signal transmitted of wave beam instruction information instruction.

Pass through the above method, terminal can determine cell locating for data cell used in the second base station pilot signal transmitted, wave beam and pilot signal according at least one of lower information in pilot signal request message, so that terminal can quickly determine the information such as the occupied running time-frequency resource of pilot signal of the second base station transmission, improve efficiency and accuracy that terminal receives the pilot signal that the second base station is sent, to be apt to channel quality between terminal and the second base station by changing, system throughput is improved.

Optionally, include at least one of following information in the pilot signal instruction information:

Site information, for sending the second base station of the pilot signal to terminal instruction；

Subframe indicates information, is used to indicate the downlink subframe including the pilot signal and is located at position of second base station into all downlink subframes that the terminal is sent；

Frequency domain position indicates information, is used to indicate the position of the pilot signal shared frequency resource element in downlink subframe；

Time-domain position indicates information, is used to indicate the position of the pilot signal shared time-domain resource unit in downlink subframe；

Duration indicates information, be used to indicate first that second base station is sent include pilot signal downlink subframe to the last one include the sum of the duration between the downlink subframe of pilot signal.

Indicate that information can indicate downlink subframe locating for pilot signal, the pilot signal position of shared frequency resource element, the pilot signal information such as position of shared time-domain resource unit in downlink subframe in downlink subframe to terminal by pilot signal, so that terminal can quickly receive pilot signal, so that terminal quickly can determine the information such as CQI according to pilot signal.

Optionally, the site information includes at least one of following information:

Base station identification information is used to indicate the base station of pilot signal transmitted；

Cell identity information is used to indicate cell locating for the pilot signal of the second base station transmission；

Data cell identification information is used to indicate data cell used in the second base station pilot signal transmitted；

Wave beam identification information is used to indicate wave beam used in the second base station pilot signal transmitted.

By the above method, terminal can be made to determine cell, data cell and the wave beam of the second base station pilot signal transmitted, to improve the efficiency that terminal receives pilot signal.

Optionally, the frequency domain position instruction information is bit map；A bit in the bit map and a frequency resource element in downlink subframe locating for the pilot signal are uniquely corresponding；

When the value of a bit in the bit map be preset threshold when, the value of the bit indicate the pilot signal occupy in downlink subframe locating for the pilot signal with frequency resource element corresponding to the bit.

Optionally, the pilot signal instruction information is located in downlink subframe locating for the pilot signal in dedicated physical layer channel, wherein the dedicated physical layer channel is the default resource block in downlink subframe locating for the pilot signal.

Optionally, after the first base station determines that pilot signal indicates information, further includes:

The first base station sends the pilot signal to second base station by pilot signal notification message and indicates information.

Second aspect, the embodiment of the present application provide a kind of base station, can execute any one communication means for realizing that above-mentioned first aspect provides.

In a kind of possible design, the base station includes multiple functional modules, any one communication means provided for realizing above-mentioned first aspect, so that in the case where the second base station and terminal are not connected or connect bad by the channel quality between first base station auxiliary the second base station of terminal check and terminal, so that terminal quickly determines the information such as the occupied running time-frequency resource of pilot signal of the second base station transmission, improve efficiency and accuracy that terminal receives the pilot signal that the second base station is sent, to the quality of channel between the second base station of quick obtaining and terminal, by improving channel quality, improve system throughput.

It include processor and transceiver in the structure of base station in a kind of possible design, the processor is configured to base station is supported to execute corresponding function in above-mentioned communication means.The transceiver is used to support the communication between base station and terminal, to information or instruction involved in the above-mentioned communication means of terminal transmission.It can also include memory in base station, the memory saves the necessary program instruction in base station and data for coupling with processor.

The third aspect, the embodiment of the present application provide a kind of communication means, comprising:

When pilot signal, which sends condition, to be met, the second base station generates pilot signal；

Second base station sends the pilot signal to terminal.

According to method provided by the embodiments of the present application, second base station is not the pilot signal transmitted in each downlink subframe, but when determining that pilot signal transmission condition meets, to terminal pilot signal transmitted, to avoid requiring to include pilot signal into each downlink subframe that terminal is sent, to reduce resource shared by pilot signal transmitted, improve resource utilization.

Optionally, it is any one in the following conditions that the pilot signal, which sends condition:

Second base station receives the access request of terminal transmission；

Second base station, which determines, to be needed to send downlink data to terminal；

Second base station receives the resource request of terminal transmission；

The pilot signal that second base station receives first base station transmission sends a notification message, and the pilot signal, which sends a notification message, is used to indicate second base station to terminal pilot signal transmitted；

Second base station receives the pilot request message of terminal transmission.

Optionally, the pilot request message or the pilot signal send a notification message in include at least one of following information:

By the above method, cell of second base station indicated by terminal can be made, pilot signal transmitted in data cell and wave beam, to improve the efficiency that terminal receives pilot signal.

Optionally, the method also includes:

Second base station sends the pilot signal to the terminal and indicates information, and the pilot signal instruction information is used to indicate the position of pilot signal that the second base station is sent to terminal in downlink subframe.

Downlink subframe locating for pilot signal can be indicated to terminal by pilot signal instruction information, lead The frequency signal position of shared frequency resource element, pilot signal information such as position of shared time-domain resource unit in downlink subframe in downlink subframe, so that terminal can quickly receive pilot signal, so that terminal quickly can determine the information such as CQI according to pilot signal.

Optionally, when pilot signal instruction information includes the site information, the site information includes at least one of following information:

Optionally, when pilot signal instruction information includes the frequency domain position instruction information, the frequency domain position instruction information is bit map；A bit in the bit map and a frequency resource element in downlink subframe locating for the pilot signal are uniquely corresponding；

Optionally, the method also includes:

Second base station sends target downlink subframe to target terminal, and indicates in the target downlink subframe whether include the pilot signal to target terminal；The target terminal is any one terminal in access second base station in addition to the terminal.

Optionally, second base station indicates in the target downlink subframe whether include the pilot signal to target terminal, comprising:

Whether second base station includes the pilot signal by sending the pilot signal to indicate that information indicates in the target downlink subframe to the target terminal；Or

Second base station passes through to physical down chain corresponding with target terminal in the target downlink subframe Scrambling mode used by road control channel or enhancing physical downlink control channel indicates in the target downlink subframe whether include the pilot signal to the target terminal；Or

Second base station indicates in the target downlink subframe whether include the pilot signal to the target terminal by pilot signal transmitted flag information in physical downlink control channel corresponding with target terminal in the target downlink subframe or enhancing physical downlink control channel；Or

Whether second base station includes the pilot signal by the way that pilot signal transmitted flag information indicates in the target downlink subframe to the target terminal in the common physical down instruction channel in the target downlink subframe.

Fourth aspect, the embodiment of the present application provide a kind of base station, can execute any one communication means for realizing that the above-mentioned third aspect provides.

In a kind of possible design, the base station includes multiple functional modules, for realizing any one of the above communication means, so that base station is when determining that pilot signal transmission condition meets, to terminal pilot signal transmitted, to avoid requiring to include pilot signal into each downlink subframe that terminal is sent, to reduce resource shared by pilot signal transmitted, improve resource utilization.

It include processor and transceiver in the structure of the base station in a kind of possible design, the processor is configured to base station is supported to execute corresponding function in above-mentioned communication means.The transceiver is used to support the communication between base station and terminal, to information or instruction involved in the above-mentioned communication means of terminal transmission.It can also include memory in base station, the memory saves the necessary program instruction in base station and data for coupling with processor.

5th aspect, the embodiment of the present application provide a kind of communication system, comprising:

First base station, for determining that pilot signal indicates information, wherein pilot signal instruction information is used to indicate the position of pilot signal that the second base station is sent to terminal in downlink subframe；The pilot signal, which is sent, to the terminal indicates information；

Second base station, for when pilot signal sends condition and meets, the second base station to generate pilot signal；The pilot signal is sent to terminal；

Terminal indicates information for receiving the pilot signal that the first base station is sent, and indicates that information receives the pilot signal that second base station is sent according to the pilot signal.

In communication system provided by the embodiments of the present application, first base station can execute any one communication means for realizing that above-mentioned first aspect provides.Correspondingly, the second base station can execute any one communication means for realizing that the above-mentioned third aspect provides.

6th aspect, the embodiment of the present application provide a kind of computer storage medium, and for being stored as computer software instructions used in the base station that above-mentioned second aspect provides, it includes for executing program designed by above-mentioned first aspect.

7th aspect, the embodiment of the present application provide a kind of computer storage medium, and for being stored as computer software instructions used in the base station that above-mentioned fourth aspect provides, it includes for executing program designed by the above-mentioned third aspect.

Detailed description of the invention

Fig. 1 is a kind of CRAN communication network schematic diagram；

Fig. 2 is a kind of communication network schematic diagram；

Fig. 3 is that a kind of base station network provided by the embodiments of the present application covers schematic diagram；

Fig. 4 is a kind of communication means flow diagram provided by the embodiments of the present application；

Fig. 5 is a kind of pattern schematic diagram of pilot signal provided by the embodiments of the present application；

Fig. 6 is a kind of pattern schematic diagram of pilot signal provided by the embodiments of the present application；

Fig. 7 is a kind of communication means schematic diagram provided by the embodiments of the present application；

Fig. 8 is a kind of communication means schematic diagram provided by the embodiments of the present application；

Fig. 9 is a kind of communication means flow diagram provided by the embodiments of the present application；

Figure 10 is a kind of architecture of base station schematic diagram provided by the embodiments of the present application；

Figure 11 is a kind of architecture of base station schematic diagram provided by the embodiments of the present application；

Figure 12 is a kind of architecture of base station schematic diagram provided by the embodiments of the present application；

Figure 13 is a kind of architecture of base station schematic diagram provided by the embodiments of the present application；

Figure 14 is a kind of communication system architecture schematic diagram provided by the embodiments of the present application.

Specific embodiment

The embodiment of the present application is suitable for 4G (forth generation mobile communication system) evolution system, such as LTE (Long Term Evolution, long term evolution) system, 5G (the 5th Generation Mobile Communication System) system, such as use the access net of novel radio access technology (newo radio access technology, New RAT)；The communication networks such as CRAN (Cloud Radio Access Network, cloud wireless access network).

In the embodiment of the present application, term " terminal " includes but is not limited to movement station, fixation or moving user unit, pager, cellular phone, personal digital assistant (Personal Digital Assistant, PDA), computer or the user equipment (user equipment, UE) that can be worked in wireless environments of any other type.Term " base station " includes but is not limited to base station, node, base station controller, access point (Access Point, AP), macro station, micro- station or small station, high frequency station, low frequency station, wave beam, relay station, base station part of functions, the interface equipment that can be worked in wireless environments of CRAN unit or any other type.Meanwhile " base station " includes but is not limited to the base station in 4G system, the base station in 5G system.

Scheme provided by the embodiments of the present application is suitable for the networks such as CRAN.As shown in Figure 1, being a kind of CRAN communication network schematic diagram.As shown in figure 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 service multiple terminals.For example, 110 service terminal 111 of CRAN cluster and terminal 112, and 120 service terminal 121 of CRAN cluster, 130 service terminal 131 of CRAN cluster.Each CRAN cluster can be divided into one or more control units (Central Unit, CU), and the one or more data cells (Data Unit, DU) of CU connection.CU can connect single DU or multiple DU.In general, CRAN cluster can have different number of CU, DU etc., and service different number of terminal.

Scheme provided by the embodiments of the present application applies also in the scene that terminal switches between different community.Specifically, as shown in Fig. 2, needing quickly to determine the information such as the channel quality between base station 202 by pilot signal when terminal 203 is from the cell that the cell of base station 201 is moved to base station 202.It wherein, include but is not limited to the scenes such as the cell under same base station, the cell under different base station between different community.

Scheme provided by the embodiments of the present application applies also for the scene that multiple micro-base stations are covered in macro station.Specifically, as shown in figure 3, for a kind of base station network covering schematic diagram provided by the embodiments of the present application.Macro station 301 Signal cover in there are two micro-base stations, respectively 302 and 303, terminal 304 can select to access macro station 301, micro-base station 302 or micro-base station 303 according to the actual situation.Wherein, macro station includes but is not limited to the macro station in 4G system, the macro station in 5G system；Correspondingly, micro-base station includes but is not limited to the micro-base station in 4G system, the micro-base station in 5G system.

In the embodiment of the present application, pilot signal can be the pilot signal for terminal progress channel measurement；Pilot signal can be the pilot signal for terminal progress channel estimation；Pilot signal can also be the pilot signal for terminal progress channel state measurement and feedback, and the particular content of pilot signal can be with reference to the description in existing communication standard, and details are not described herein.

It should be noted that first base station and the second base station are intended merely to distinguish different base stations in the embodiment of the present application, other meanings such as sequence to base station are not represented.

Based on foregoing description, as shown in figure 4, the embodiment of the present application provides a kind of communication means flow diagram, comprising:

Step 401, first base station determines that pilot signal indicates information, wherein pilot signal instruction information is used to indicate the position of pilot signal that the second base station is sent to terminal in downlink subframe；

Step 402, the first base station sends the pilot signal to the terminal and indicates information.

In step 401, before first base station determines pilot signal instruction information, terminal first can send pilot tone to first base station and indicate request message, and the pilot tone instruction request message is for requesting the first base station to send the pilot signal instruction information to the terminal.After the first base station receives the pilot tone instruction request message that terminal is sent, to trigger the step of first base station executes pilot signal transmitted instruction information.

It should be noted that first base station can be macro station, such as eNB (Evolved Node B, evolved base station) in the embodiment of the present application；Second base station can be micro-base station, such as femtocell (winged honeycomb) etc..Macro base station has the characteristics that signal cover is wide, capacity is big.But there is the object (such as high building) for blocking signal in some regions, the region can not be covered so as to cause the signal of macro base station, can arrange micro-base station in the region at this time.Micro-base station has the characteristics that coverage area is small, small in size, easy for installation, so as to form complementary relationship between macro base station.Under the scene, optionally, the second base station is the base station in the signal cover of first base station.Certainly, the second base station may be that there are the base stations of overlapping region for the signal cover of signal cover and first base station.

In the embodiment of the present application, first base station is determined there are many modes of pilot signal instruction information.In a kind of possible implementation, first base station determines that pilot signal indicates information according to information such as running time-frequency resources of pilot signal transmitted that first base station is that the second base station is distributed.In this mode, first base station can independently determine the second base station send pilot signal in downlink subframe the position of shared frequency resource element, shared time-domain resource unit position, it can also independently determine that the downlink subframe including pilot signal that the second base station is sent is located at the information such as position of second base station into all downlink subframes that the terminal is sent, and determine that pilot signal indicates information according to above- mentioned information.

Optionally, if first base station determines that pilot signal indicates that pilot signal can also be indicated that information is sent to the second base station by information, first base station according to information such as the running time-frequency resources of pilot signal transmitted that first base station is that the second base station is distributed.For example, first base station can be sent a notification message by the pilot signal sent to the second base station pilot signal transmitted instruction information be sent to the second base station.The pilot signal, which sends a notification message, is used to indicate second base station to the terminal pilot signal transmitted.Certainly, the above only example, first base station can also indicate information to the second base station pilot signal transmitted by other means, and details are not described herein.

In a kind of possible implementation, first base station can receive the pilot signal instruction information of the second base station transmission, so that the pilot signal received instruction information is transmitted to terminal.

First base station can send a notification message to second base station pilot signal transmitted.Second base station receives after pilot signal sends a notification message, and can indicate information to first base station pilot signal transmitted, and to terminal pilot signal transmitted.At this point, first base station may thereby determine that pilot signal indicates information.

Optionally, before first base station pilot signal transmitted sends a notification message, the pilot signal request message of terminal transmission can also be received, the pilot signal request message is for requesting the first base station to indicate that second base station sends the pilot signal to the terminal.

Optionally, pilot signal send a notification message in may include at least one of following information:

Optionally, in the embodiment of the present application, cell instruction information, data cell instruction information and wave beam instruction information can be determining for terminal and be sent to first base station.Such as, terminal can determine that terminal receives the information such as cell, wave beam, the data cell of pilot signal according to information such as the positions that terminal is presently in, and indicate that information, data cell instruction information, wave beam indicate the pilot signal request message of at least one information in information including cell to first base station transmission, thus by the way that the second base station of first base station instruction is used corresponding cell, using corresponding wave beam, data cell pilot signal transmitted.

It should be noted that, in the embodiment of the present application, data cell is the entity of the part protocol layer comprising existing base station, such as only comprising the partial function of physical layer, or the function comprising whole physical layers, or the partial function comprising physical layer and MAC (Media Access Control, media access control) layer.

Optionally, may include at least one of following information in the pilot signal instruction information in the embodiment of the present application:

Each information in pilot signal instruction information is described separately below:

One, site information

In the embodiment of the present application, the site information may include at least one of following information:

By site information, can be indicated to terminal pilot signal transmitted base station and base station pilot signal transmitted used in the information such as cell, data cell, wave beam so that terminal quickly determines pilot signal.

Two, subframe indicates information

In the embodiment of the present application, it second base station may be not in the equal pilot signal transmitted into all downlink subframes that terminal is sent, for this purpose, can indicate that information indicates that the downlink subframe including the pilot signal is located at position of second base station into all downlink subframes that the terminal is sent by subframe.Subframe instruction information can indicate that each bit and a downlink subframe are uniquely corresponding with multiple bits, when the value of a bit is default value, can indicate to include pilot signal in downlink subframe corresponding with the bit；When the value of a bit is not default value, it can indicate that in downlink subframe corresponding with the bit do not include pilot signal.

It should be noted that the corresponding relationship of each bit and downlink subframe can be made an appointment by the second base station with terminal.

For example, it when the second base station determines that pilot signal transmission condition meets, determines and needs to send 4 frame downlink subframes to terminal, and determining needs the pilot signal transmitted in front cross frame downlink subframe, presetting value is 1.At this point, subframe instruction information can be 1100, indicate that in the third frame downlink subframe and the 4th frame downlink subframe that send in the first frame downlink subframe and the second frame downlink subframe of the second base station transmission including pilot signal, the second base station do not include pilot signal.Certainly, subframe instruction information can also be other forms, and details are not described herein.

Optionally, in the embodiment of the present application, the second base station can send the downlink subframe including pilot signal every H downlink subframe, and H is natural number.At this point, the period that subframe instruction information can indicate that the second base station sends the downlink subframe including pilot signal is H.

Pass through the above method, the position of all downlink subframes including pilot signal of the second base station transmission is indicated to terminal by subframe instruction information, so that terminal can quickly position the downlink subframe including pilot signal, to obtain pilot signal, information processing efficiency is improved.

Three, frequency domain position instruction information and time-domain position indicate information

It can not include frequency domain position instruction information in pilot signal instruction information if the position of pilot signal shared frequency resource element in downlink subframe is preset frequency resource element in the embodiment of the present application.Correspondingly, can not include time-domain position instruction information in pilot signal instruction information if the position of pilot signal shared time-domain resource unit in downlink subframe is preset time-domain resource unit.

It should be noted that preset frequency resource element or preset time-domain resource unit refer to the second base station and terminal is made an appointment the frequency resource element or time-domain resource unit of pilot signal transmitted.

In the embodiment of the present application, frequency domain position indicates that information and time-domain position instruction information can be there are many ways of realization.Below by pilot signal in downlink subframe the position of shared time-domain resource unit be preset time-domain resource unit, pilot signal shared frequency resource element in downlink subframe position be not preset frequency resource element for be described, pilot signal position of shared time-domain resource unit in downlink subframe is not that the implementation of preset time-domain resource unit can be with reference to following description, and details are not described herein.

In a kind of possible way of realization, frequency domain position indicates that information can be bit map；A bit in bit map and a frequency resource element in downlink subframe locating for the pilot signal are uniquely corresponding.When the value of a bit in the bit map is preset threshold, the value of the bit indicate the pilot signal occupy in downlink subframe locating for pilot signal with frequency resource element corresponding to the bit；Otherwise, the value of the bit indicate in downlink subframe locating for the vacant pilot signal of the pilot signal with frequency resource element corresponding to the bit.

It should be noted that the corresponding relationship of each bit and frequency resource element can be made an appointment by the second base station with terminal in bit map, details are not described herein.

For example, preset threshold 1.At this point, when the value of a bit in bit map is 1, indicate pilot signal occupy locating for pilot signal in downlink subframe with frequency resource element corresponding to the bit；The value of a bit in bit map be 0 when, indicate the vacant downlink subframe of pilot signal in frequency resource element corresponding to the bit.Certainly, it is above only example, preset threshold may be 0, at this point, correspondingly, the value of bit be 1 when, indicate the vacant downlink subframe of pilot signal in frequency resource element corresponding to the bit.

Correspondingly, time-domain position instruction information may be bit map；A ratio in the bit map Special position and a time-domain resource unit in first downlink subframe are uniquely corresponding.When the value of a bit in the bit map be preset threshold when, the value of the bit indicate the pilot signal occupy in first downlink subframe with time-domain resource unit corresponding to the bit；Otherwise, the value of the bit indicate in vacant first downlink subframe of the pilot signal with time-domain resource unit corresponding to the bit.

It should be noted that the corresponding relationship of each bit and time-domain resource unit can be made an appointment by the second base station with terminal in bit map, details are not described herein.

The position of shared frequency resource element and time-domain resource unit can there are many forms, the embodiment of the present application not to limit in downlink subframe for pilot signal.For example, pilot signal can occupy a frequency resource element every y frequency resource element on frequency domain, in time domain every x time-domain resource unit one time-domain resource unit of occupancy.For another example pilot signal can occupy a frequency resource element every y frequency resource element on frequency domain, in time domain in i-th to k time-domain resource unit occupancy (i-k+1) a time-domain resource unit.Wherein, y, x, i, k are natural number.

In the embodiment of the present application, one time-domain resource unit can be random waveform symbol, including but not limited to an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol, sparse Code Division Multiple Access (Sparse Code Multiplexing Access, SCMA) symbol, filtering orthogonal frequency division multiplexing (Filtered Orthogonal Frequency Division Multiplexing, F-OFDM) symbol, non-orthogonal multiple access (Non-Orthogonal Multiple Access, NOMA) Symbol is described below and middle random waveform symbol is referred to as symbol；One frequency resource element can be a subcarrier.

For example, as shown in figure 5, being a kind of pattern schematic diagram of pilot signal provided by the embodiments of the present application.In Fig. 5, in a downlink subframe, pilot signal occupies a frequency resource element every 6 frequency resource elements on frequency domain, occupies a time-domain resource unit on the 1st time-domain resource unit in time domain.

In the embodiment of the present application, pilot signal can occupy whole system bandwidth, can also only take up part system bandwidth.When pilot signal occupies part system bandwidth, it is possible to reduce the density of pilot signal, so that the resource block of occupancy is reduced, to improve resource utilization.Specifically, whole system bandwidth can be pressed It is Q frequency band according to frequency partition, the resource block that pilot signal occupies is only positioned in E frequency band therein, to reduce the density of pilot signal.Wherein, Q is greater than 2, E and is less than Q.

For example, as shown in fig. 6, being a kind of pattern schematic diagram of pilot signal provided by the embodiments of the present application.In Fig. 6, whole system bandwidth is 3 frequency bands according to frequency partition, and the resource block that pilot signal occupies is only positioned in 1 frequency band therein.

Four, the duration indicates information

In the embodiment of the present application, second base station may send the downlink subframe that at least one includes pilot signal to terminal, therefore the pilot signal that information makes terminal receive the transmission of the second base station in the time span that the duration indicates information instruction can be indicated by the duration.

Finally, in step 402, first base station sends the pilot signal determined to terminal and indicates information.

Optionally, pilot signal instruction information can be located in downlink subframe locating for the pilot signal in dedicated physical layer channel, wherein the dedicated physical layer channel is the default resource block in downlink subframe locating for the pilot signal.Pilot signal instruction information may be located in downlink subframe locating for the pilot signal in existing physical layer channel, such as, PDCCH (Physical Downlink Control Channel, physical downlink control channel), the channels such as ePDCCH (enhanced Physical Downlink Control Channel enhances physical downlink control channel).

Optionally, in the embodiment of the present application, first base station can also indicate information to terminal pilot signal transmitted by MAC layer message or RRC (Radio Resource Control, wireless heterogeneous networks) signaling.

If first base station indicates information to terminal pilot signal transmitted by MAC layer message, the MAC layer message including pilot signal instruction information can be existing MAC layer message, or the newly-built MAC layer message dedicated for pilot signal transmitted instruction information.

If the RRC signaling including pilot signal instruction information can be existing RRC signaling correspondingly, first base station indicates information to terminal pilot signal transmitted by RRC signaling, or the newly-built RRC signaling dedicated for pilot signal transmitted instruction information.

Optionally, the first base station can also send the pilot signal to second base station by pilot signal notification message and indicate information.The pilot signal notification message may be used to indicate that second base station to terminal pilot signal transmitted.

In the embodiment of the present application, it can be identical message that pilot signal notification message and pilot signal, which send a notification message, pilot signal notification message or pilot signal send a notification message while the second base station can be indicated to terminal pilot signal transmitted at this time, and the second base station Xiang Suoshu sends the pilot signal and indicates information.Pilot signal notification message and pilot signal send a notification message or two different message, can be determined according to the actual situation, details are not described herein.

Optionally, terminal is after the pilot signal for receiving the transmission of the second base station, to first base station pilot signal transmitted adjustment request message, the pilot signal adjustment request message is used to indicate the frequency that the first base station notifies the second base station adjustment pilot signal transmitted.After first base station receives the pilot signal adjustment request information of terminal transmission, instruction message can be adjusted to the second base station pilot signal transmitted, the pilot signal adjustment instruction message is used to indicate the frequency of the second base station adjustment pilot signal transmitted.Pilot signal adjustment instruction message can indicate that the second base station increases the frequency of pilot signal transmitted, can also indicate that the frequency of pilot signal transmitted adjustment instruction message is reduced in the second base station.Specifically it can indicate that the subframe in information indicates information by changing pilot signal, frequency domain position indicates that information and time-domain position indicate information, duration indicates one or more in information to change, physical layer channel can also be passed through, MAC layer or rrc layer message directly indicate, it can be determined according to the actual situation, details are not described herein.

Process shown in Fig. 4 is described below by specific embodiment.

As shown in fig. 7, being a kind of communication means schematic diagram provided by the embodiments of the present application.

Step 701: terminal is to first base station pilot signal transmitted request message.

The pilot signal request message is for requesting the first base station to indicate that second base station sends the pilot signal to the terminal.

Optionally, step 702: first base station sends a notification message to the second base station pilot signal transmitted.

The pilot signal, which sends a notification message, is used to indicate second base station to the terminal pilot signal transmitted.

In addition, the step is optional.When pilot signal instruction information is generated by first base station, when pilot signal sends a notification message for indicating information to second base station pilot signal transmitted；First base station is notified when the second base station is in pilot signal transmitted, and by pilot signal instruction information.The pilot signal that first base station receives the transmission of the second base station just determines the pilot signal instruction letter sent to terminal after indicating information When breath, step 702 be can be omitted.

Step 703: first base station sends the pilot signal to the terminal and indicates information.

Step 704: the second base station is to terminal pilot signal transmitted.

As shown in figure 8, being a kind of communication means schematic diagram provided by the embodiments of the present application.

Step 801: the second base station broadcast pilot in the signal cover of the second base station.

Step 802: terminal is to first base station pilot signal transmitted request message.

Step 803: first base station sends the pilot signal to the terminal and indicates information.

Step 804: terminal indicates that information receives pilot signal according to the pilot signal, and to first base station pilot signal transmitted adjustment request message.

Step 805: first base station adjusts instruction message to the second base station pilot signal transmitted.

Step 806: the second base station adjusts the frequency of instruction message adjustment pilot signal transmitted according to pilot signal.

The pilot signal adjustment instruction message is used to indicate the frequency of the second base station adjustment pilot signal transmitted.

Base station can in periodic broadcast message pilot signal transmitted；Or in pilot signal transmitted etc. into the downlink subframe of terminal distribution resource.Such as, in time-division long term evolution (Time Division Long Term Evolution, TD-LTE) in system, cell reference signals (Cell-Specific Reference Singals, it CRS) is a kind of important pilot signal, terminal can carry out the operation such as channel estimation according to CRS.CRS is primary every occurring in six sub- carrier occupancies, one resource element (resource element, RE), time domain every two to four symbols on frequency domain.In the single antenna case, CRS occupies 4 resource elements in each resource block (resource block, RB), and CRS is across whole system bandwidth.It is different according to the number of transmission antennas of base station, resource ratio shared by CRS is between 4.8%-14.3% in one downlink subframe, the resource of busy channel is very more, and the resource utilization of channel is low, needs to provide a kind of method for reducing expense caused by pilot signal transmitted thus.

Based on foregoing description, as shown in figure 9, the embodiment of the present application provides a kind of communication means flow diagram, comprising:

Step 901, when pilot signal, which sends condition, to be met, the second base station generates pilot signal.

Wherein, the associated description of the second base station can refer to the description of front, and details are not described herein.

Step 902, second base station sends the pilot signal to terminal.

In step 901, the second base station can determine that meeting pilot signal sends condition, is described in detail separately below in several cases.

The first possible condition are as follows: the second base station receives the access request of terminal transmission.

Terminal needs to first pass through random access (Random Access) process and connection is established in the second base station when needing to send upstream data.Terminal needs to send access request to the second base station in carrying out random access procedure, after the second base station receives the access request of terminal transmission, so that it is determined that meeting pilot signal sends condition.

For example, the access request that terminal is sent to the second base station is lead code (Preamble), second base station is after the lead code for receiving terminal transmission, so that it is determined that needing to terminal pilot signal transmitted, pilot signal can be used for terminal and estimate the channel quality between the second base station and terminal.

Second of possible condition are as follows: the second base station, which determines, to be needed to send downlink data to terminal.For example, the downlink data that the second base station receives other base stations or other terminals are sent to the terminal, or need directly to send downlink data to terminal.

The third possible condition are as follows: the second base station receives the resource request of terminal transmission.

The resource request that second base station receives terminal transmission can be scheduling request (Schedule Request, SR), or Buffer Status Report (Buffer Status Reports, BSR) etc. is used to request the message of ascending resource.

4th kind of possible condition are as follows: the pilot signal that the second base station receives first base station transmission sends a notification message.The particular content that pilot signal sends a notification message can refer to the description of front, and details are not described herein.

5th kind of possible condition are as follows: the second base station receives the pilot request message of terminal transmission, and the pilot request message is for requesting second base station to terminal pilot signal transmitted.Such as when terminal detects the signal of the second base station when being deteriorated, terminal in order to more determine the second base station signal intensity situation, pilot request message is sent to the second base station, the second base station of request sends more pilot signals, so as to judge the signal quality of the second base station according to pilot signal.

Optionally, include at least one of following information in the pilot request message:

Certainly, condition above is example, and pilot signal, which sends condition, can also other forms, and details are not described herein.

In the embodiment of the present application, when the second base station determines that pilot signal transmission condition meets, it can also be performed as the operation such as terminal distribution ascending resource.The sequence number for the ascending resource reporting terminal that terminal can be distributed by the second base station, alternatively, sending the information such as the CQI determined according to pilot signal to the second base station by the ascending resource that the second base station is distributed.It should be noted that how terminal according to pilot signal determines that CQI is the prior art, and it specifically can be with reference to the regulation in existing communication standard, details are not described herein for the embodiment of the present application.

Optionally, in the embodiment of the present application, the second base station can also indicate information to terminal pilot signal transmitted.The concrete mode of the second base station content included into the pilot signal instruction information that terminal is sent and second terminal pilot signal transmitted instruction information, can refer to the description of front, details are not described herein.

In step 902, the second base station can also send target downlink subframe to target terminal, and indicate in the target downlink subframe whether include the pilot signal to target terminal；The target terminal is any one terminal in access second base station in addition to the terminal.Target downlink subframe is any one downlink subframe that the second base station is sent to target terminal.

Second base station can indicate in the target downlink subframe whether include the pilot signal to target terminal in several ways.In a kind of possible implementation, whether second base station can include the pilot signal by sending the pilot signal to indicate that information indicate in the target downlink subframe to the target terminal.Second base station can refer to the description of front to the specific implementation of target terminal pilot signal transmitted instruction information, and details are not described herein.

In a kind of possible implementation, second base station by the target downlink subframe with mesh Scrambling mode used by the corresponding physical downlink control channel of mark terminal or enhancing physical downlink control channel indicates in the target downlink subframe whether include the pilot signal to the target terminal.For example, second base station and terminal made an appointment the use of target downlink subframe scrambling mode and target downlink subframe in whether include pilot signal mapping relations, such as when the second base station passes through the first RNTI (Radio Network Tempory Identity, radio network temporary identifier) scrambling target downlink subframe when, it indicates to contain pilot signal in target downlink subframe, when scrambling target downlink subframe by the 2nd RNTI mode, indicate in target downlink subframe not comprising pilot signal.Wherein, the first RNTI is different from the 2nd RNTI.Certainly, above is example, and scrambling mode used by the second base station can also have other forms, and details are not described herein.

In a kind of possible implementation, by pilot signal transmitted flag information in physical downlink control channel corresponding with target terminal in the target downlink subframe or enhancing physical downlink control channel, whether it includes the pilot signal that Xiang Suoshu target terminal indicates in the target downlink subframe for second base station.For example, pilot signal flag information occupies 1 bit, when the bit that pilot signal flag information occupies is 1, indicates to contain pilot signal in target downlink subframe；When the bit that pilot signal flag information occupies is 0, indicate in target downlink subframe not comprising pilot signal.Certainly, above only example, pilot signal flag information can also have other forms, and details are not described herein.

In a kind of possible implementation, by indicating pilot signal transmitted flag information in channel in the common physical down in the target downlink subframe, whether it includes the pilot signal that Xiang Suoshu target terminal indicates in the target downlink subframe for second base station.

Optionally, in the embodiment of the present application, pilot signal notification message and pilot signal send a notification message can be for identical message, and pilot signal notification message or pilot signal send a notification message and send the pilot signal instruction information to second base station while the second base station can be indicated to terminal pilot signal transmitted at this time., pilot signal notification message and pilot signal send a notification message or two different message, can be determined according to the actual situation, details are not described herein.

According to method provided by the embodiments of the present application, second base station is not the pilot signal transmitted in each downlink subframe, but when determining that pilot signal transmission condition meets, to terminal pilot signal transmitted, to avoid requiring to include pilot signal into each downlink subframe that terminal is sent, to reduce hair Resource shared by pilot signal is sent, is improved resource utilization.

Based on same idea, a kind of base station is provided in the embodiment of the present invention, can be used for executing above method process.

It as shown in Figure 10, is a kind of architecture of base station schematic diagram provided by the embodiments of the present application.

Referring to Figure 10, which includes:

Processing unit 1001, for determining that pilot signal indicates information, wherein pilot signal instruction information is used to indicate the position of pilot signal that the second base station is sent to terminal in downlink subframe；

Transmit-Receive Unit 1002 indicates information for sending the pilot signal to the terminal.

Optionally, the Transmit-Receive Unit 1002 is also used to:

The pilot tone instruction request message that the terminal is sent is received, the pilot tone instruction request message is for requesting the base station to send the pilot signal instruction information to the terminal.

Optionally, the Transmit-Receive Unit 1002 is also used to:

The pilot signal request message that the terminal is sent is received, the pilot signal request message is for requesting the base station to indicate that second base station sends the pilot signal to the terminal.

Optionally, the Transmit-Receive Unit 1002 is also used to:

The pilot signal, which is sent, to second base station by pilot signal notification message indicates information.

According to base station provided by the embodiments of the present application, after the pilot signal instruction information that the second base station pilot signal transmitted has been determined, pilot signal instruction information is sent to terminal, it may be implemented to assist the channel quality between the second base station of terminal check and terminal by first base station in the case where the second base station and terminal are not connected or connect bad, so that terminal quickly determines the information such as the occupied running time-frequency resource of pilot signal of the second base station transmission, improve efficiency and accuracy that terminal receives the pilot signal that the second base station is sent, to the quality of channel between the second base station of quick obtaining and terminal, by improving channel quality, improve system throughput.

Based on same idea, a kind of base station is provided in the embodiment of the present invention, can be used for executing the above method Process.

It as shown in figure 11, is a kind of architecture of base station schematic diagram provided by the embodiments of the present application.

Referring to Figure 11, which includes: processor 1101, memory 1102 and transceiver 1103.

Memory 1102 can be used to store program.

Processor 1101 reads the corresponding instruction of described program from the memory 1102, performs the following operations:

Determine that pilot signal indicates information, wherein pilot signal instruction information is used to indicate the position of pilot signal that the second base station is sent to terminal in downlink subframe；

Transceiver 1103 indicates information for sending the pilot signal to the terminal.

Optionally, the transceiver 1103 is also used to:

Cell indicates information；

Data cell indicates information；

Wave beam indicates information.

Specific descriptions about the content for including in above-mentioned pilot signal request message are referred to the related content of front in the embodiment of the present application, and this will not be repeated here.

Site information；

Subframe indicates information；

Frequency domain position indicates information；

Time-domain position indicates information；

Duration indicates information.

Specific descriptions about above-mentioned all kinds of pilot signal instruction information are referred to the related content of front in the embodiment of the present application, and this will not be repeated here.

Base station identification information；

Cell identity information；

Data cell identification information；

Wave beam identification information.

Specific descriptions about above-mentioned all kinds of site information are referred to the related content of front in the embodiment of the present application, and this will not be repeated here.

Optionally, the transceiver 1103 is also used to:

Detailed description about the function of device or device in the base station is referred to the related content of the application other embodiments, and this will not be repeated here.

It as shown in figure 12, is a kind of architecture of base station schematic diagram provided by the embodiments of the present application.

Referring to Figure 12, which includes:

Processing unit 1201, for generating pilot signal when pilot signal sends condition and meets；

Transmit-Receive Unit 1202, for sending the pilot signal to terminal.

Optionally, the Transmit-Receive Unit 1202 is also used to:

Target downlink subframe is sent to target terminal, and indicates in the target downlink subframe whether include the pilot signal to target terminal；The target terminal is any one terminal in access second base station in addition to the terminal.

Optionally, the processing unit 1201 is also used to:

It whether include the pilot signal by sending the pilot signal to indicate that information indicates in the target downlink subframe to the target terminal；Or

By to physical downlink control channel corresponding with target terminal in the target downlink subframe or Scrambling mode used by enhancing physical downlink control channel indicates in the target downlink subframe whether include the pilot signal to the target terminal；Or

Indicate in the target downlink subframe whether include the pilot signal to the target terminal by pilot signal transmitted flag information in physical downlink control channel corresponding with target terminal in the target downlink subframe or enhancing physical downlink control channel；Or

It whether include the pilot signal by the way that pilot signal transmitted flag information indicates in the target downlink subframe to the target terminal in the common physical down instruction channel in the target downlink subframe.

Based on same idea, a kind of base station is provided in the embodiment of the present invention.

It as shown in figure 13, is a kind of architecture of base station schematic diagram provided by the embodiments of the present application.

Referring to Figure 13, which includes: processor 1301, memory 1302 and transceiver 1303.

Memory 1302 can be used to store program.

Processor 1301 reads the corresponding instruction of described program from the memory 1302, performs the following operations:

When pilot signal, which sends condition, to be met, pilot signal is generated；

The transceiver 1303, for sending the pilot signal to terminal.

According to base station provided by the embodiments of the present application, it is not the pilot signal transmitted in each downlink subframe, but when determining that pilot signal transmission condition meets, to terminal pilot signal transmitted, to avoid requiring to include pilot signal into each downlink subframe that terminal is sent, to reduce resource shared by pilot signal transmitted, improve resource utilization.

In the embodiment of the present application, transceiver can be wired transceiver, transceiver or combinations thereof.Wired transceiver for example can be Ethernet interface.Ethernet interface can be optical interface, electrical interface or combinations thereof.Transceiver for example can be communication interfaces of wireless local network, cellular network communication interface or combinations thereof.Processor can be central processing unit (English: central processing unit, abbreviation: CPU), the combination of network processing unit (English: network processor, abbreviation: NP) or CPU and NP.Processor can further include hardware chip.Above-mentioned hardware chip can be specific integrated circuit (English: application-specific integrated circuit, abbreviation: ASIC), programmable logic device (English: programmable logic device, abbreviation: PLD) or combinations thereof.Above-mentioned PLD can be Complex Programmable Logic Devices (English: complex programmable logic device, abbreviation: CPLD), field programmable gate array (English: field-programmable gate array, abbreviation: FPGA), Universal Array Logic (English: generic array logic, abbreviation: GAL) or any combination thereof.Memory may include volatile memory (English: volatile memory), such as random access memory (English: random-access memory, abbreviation: RAM)；Memory also may include nonvolatile 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 hard disk (English: solid-state drive, abbreviation: SSD)；Memory can also include the combination of the memory of mentioned kind.

It can also include bus in Figure 11 and Figure 13 in the embodiment of the present application, bus may include the bus and bridge of any number of interconnection, and the various circuits for the memory that the one or more processors and memory specifically represented by processor represent link together.Bus can also link together various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like, and the application is no longer described further it.Transceiver provides the unit for communicating over a transmission medium with various other equipment.Processor is responsible for managing bus architecture and common processing, and memory can store processor and execute operation when institute The data used.

In conjunction with the description of front, the embodiment of the present application provides a kind of communication system.It as shown in figure 14, is a kind of communication system architecture schematic diagram provided by the embodiments of the present application.

Referring to Figure 14, the communication system, comprising:

First base station 1401, for determining that pilot signal indicates information, wherein pilot signal instruction information is used to indicate the position of pilot signal that the second base station 1402 is sent to terminal 1403 in downlink subframe；The pilot signal instruction information is sent to the terminal 1403；

Second base station 1402, for when pilot signal sends condition and meets, the second base station 1402 to generate pilot signal；The pilot signal is sent to terminal 1403；

Terminal 1403 indicates information for receiving the pilot signal that the first base station 1401 is sent, and indicates that information receives the pilot signal that second base station 1402 is sent according to the pilot signal.

Detailed description about the function of device or device in the communication system is referred to the related content of the application other embodiments, and this will not be repeated here.

This it is apparent to those skilled in the art that, the description of each embodiment provided by the invention can be cross-referenced, for convenience and simplicity of description, about each device provided in an embodiment of the present invention, equipment function and execution the step of be referred to the associated description of embodiment of the present invention method, this will not be repeated here.

It should be understood by those skilled in the art that, embodiments herein can provide as method or computer program product.Therefore, the form of complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the application.Moreover, the application can be used, in one or more, which includes the forms for the computer program product implemented in the computer-usable storage medium of computer usable program code (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.).

The application is that reference is described according to the flowchart and/or the block diagram of the method for the embodiment of the present application, equipment (system) and computer program product.It should be understood that the combination of process and/or box in each flow and/or block and flowchart and/or the block diagram that can be realized by computer program instructions in flowchart and/or the block diagram.These computer program instructions be can provide to the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to generate a machine, so that logical The instruction for crossing computer or the processor execution of other programmable data processing devices generates for realizing the equipment for the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions, which may also be stored in, to be able to guide in computer or other programmable data processing devices computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates the manufacture including commander equipment, which realizes the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that series of operation steps are executed on a computer or other programmable device to generate computer implemented processing, thus the step of instruction executed on a computer or other programmable device is provided for realizing the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.

Although the preferred embodiment of the application has been described, once a person skilled in the art knows basic creative concepts, then additional changes and modifications may be made to these embodiments.So it includes preferred embodiment and all change and modification for falling into the application range that the following claims are intended to be interpreted as.

Obviously, those skilled in the art can carry out various modification and variations without departing from scope of the present application to the application.If then the application is also intended to including these modification and variations in this way, these modifications and variations of the application belong within the scope of the claim of this application and its equivalent technologies.

Claims

A kind of communication means characterized by comprising

First base station determines that pilot signal indicates information, wherein pilot signal instruction information is used to indicate the position of pilot signal that the second base station is sent to terminal in downlink subframe；

The first base station sends the pilot signal to the terminal and indicates information.
The method according to claim 1, wherein the method also includes:

The first base station receives the pilot signal request message that the terminal is sent, and the pilot signal request message is for requesting the first base station to indicate that second base station sends the pilot signal to the terminal.
According to the method described in claim 2, it is characterized in that, including at least one of following information in the pilot signal request message:

Cell indicates information, is used to indicate the second base station pilot signal transmitted in the cell of cell instruction information instruction；

Data cell indicates information, is used to indicate the second base station and uses the data cell pilot signal transmitted of data cell instruction information instruction；

Wave beam indicates information, is used to indicate the second base station and uses the wave beam pilot signal transmitted of wave beam instruction information instruction.
Method according to any one of claims 1 to 3, which is characterized in that include at least one of following information in the pilot signal instruction information:

Site information, for sending the second base station of the pilot signal to terminal instruction；

Subframe indicates information, is used to indicate the downlink subframe including the pilot signal and is located at position of second base station into all downlink subframes that the terminal is sent；

Frequency domain position indicates information, is used to indicate the position of the pilot signal shared frequency resource element in downlink subframe；

Time-domain position indicates information, is used to indicate the position of the pilot signal shared time-domain resource unit in downlink subframe；

Duration indicates information, be used to indicate first that second base station is sent include pilot signal downlink subframe to the last one include the sum of the duration between the downlink subframe of pilot signal.
According to the method described in claim 4, it is characterized in that, the site information includes at least one of following information when pilot signal instruction information includes the site information:

Base station identification information is used to indicate the base station of pilot signal transmitted；

Cell identity information is used to indicate cell locating for the pilot signal of the second base station transmission；

Data cell identification information is used to indicate data cell used in the second base station pilot signal transmitted；

Wave beam identification information is used to indicate wave beam used in the second base station pilot signal transmitted.
According to the method described in claim 4, it is characterized in that, the frequency domain position instruction information is bit map when pilot signal instruction information includes the frequency domain position instruction information；A bit in the bit map and a frequency resource element in downlink subframe locating for the pilot signal are uniquely corresponding；

When the value of a bit in the bit map be preset threshold when, the value of the bit indicate the pilot signal occupy in downlink subframe locating for the pilot signal with frequency resource element corresponding to the bit.
Method according to any one of claims 1 to 6, it is characterized in that, the pilot signal instruction information is located in downlink subframe locating for the pilot signal in dedicated physical layer channel, wherein the dedicated physical layer channel is the default resource block in downlink subframe locating for the pilot signal.
Method according to any one of claims 1 to 7, which is characterized in that the first base station determines after pilot signal instruction information, further includes:

The first base station sends the pilot signal to second base station by pilot signal notification message and indicates information, or indicates second base station to terminal pilot signal transmitted.
A kind of base station characterized by comprising

Processing unit, for determining that pilot signal indicates information, wherein pilot signal instruction information is used to indicate the position of pilot signal that the second base station is sent to terminal in downlink subframe；

Transmit-Receive Unit indicates information for sending the pilot signal to the terminal.
Base station according to claim 9, which is characterized in that the Transmit-Receive Unit is also used to:

The pilot signal request message that the terminal is sent is received, the pilot signal request message is for requesting the base station to indicate that second base station sends the pilot signal to the terminal.
Base station according to claim 9 or 10, which is characterized in that include at least one of following information in the pilot signal request message:

Cell indicates information, is used to indicate the second base station pilot signal transmitted in the cell of cell instruction information instruction；

Data cell indicates information, is used to indicate the second base station and uses the data cell pilot signal transmitted of data cell instruction information instruction；

Wave beam indicates information, is used to indicate the second base station and uses the wave beam pilot signal transmitted of wave beam instruction information instruction.
According to any base station of claim 9 to 11, which is characterized in that include at least one of following information in the pilot signal instruction information:

Site information, for sending the second base station of the pilot signal to terminal instruction；

Subframe indicates information, is used to indicate the downlink subframe including the pilot signal and is located at position of second base station into all downlink subframes that the terminal is sent；

Frequency domain position indicates information, is used to indicate the position of the pilot signal shared frequency resource element in downlink subframe；

Time-domain position indicates information, is used to indicate the position of the pilot signal shared time-domain resource unit in downlink subframe；

Duration indicates information, be used to indicate first that second base station is sent include pilot signal downlink subframe to the last one include the sum of the duration between the downlink subframe of pilot signal.
Base station according to claim 12, which is characterized in that when pilot signal instruction information includes the site information, the site information includes at least one of following information:

Base station identification information is used to indicate the base station of pilot signal transmitted；

Cell identity information is used to indicate cell locating for the pilot signal of the second base station transmission；

Data cell identification information is used to indicate data cell used in the second base station pilot signal transmitted；

Wave beam identification information is used to indicate wave beam used in the second base station pilot signal transmitted.
Base station according to claim 12, which is characterized in that when pilot signal instruction information includes the frequency domain position instruction information, the frequency domain position instruction information is bit map；A bit in the bit map and a frequency resource element in downlink subframe locating for the pilot signal are uniquely corresponding；

When the value of a bit in the bit map be preset threshold when, the value of the bit indicate the pilot signal occupy in downlink subframe locating for the pilot signal with frequency resource element corresponding to the bit.
According to any base station of claim 9 to 14, it is characterized in that, the pilot signal instruction information is located in downlink subframe locating for the pilot signal in dedicated physical layer channel, wherein the dedicated physical layer channel is the default resource block in downlink subframe locating for the pilot signal.
According to any base station of claim 9 to 15, which is characterized in that the Transmit-Receive Unit is also used to:

The pilot signal, which is sent, to second base station by pilot signal notification message indicates information.
A kind of communication system characterized by comprising

First base station, for determining that pilot signal indicates information, wherein pilot signal instruction information is used to indicate the position of pilot signal that the second base station is sent to terminal in downlink subframe；The pilot signal, which is sent, to the terminal indicates information；

Second base station, for when pilot signal sends condition and meets, the second base station to generate pilot signal；The pilot signal is sent to terminal；

Terminal indicates information for receiving the pilot signal that the first base station is sent, and indicates that information receives the pilot signal that second base station is sent according to the pilot signal.