CN110875760B - Communication method and device - Google Patents

Communication method and device Download PDF

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Publication number
CN110875760B
CN110875760B CN201811008063.6A CN201811008063A CN110875760B CN 110875760 B CN110875760 B CN 110875760B CN 201811008063 A CN201811008063 A CN 201811008063A CN 110875760 B CN110875760 B CN 110875760B
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China
Prior art keywords
base station
special symbol
subframe
coordination information
time
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CN110875760A (en
Inventor
严朝译
谭婷
李潇亚
刘越
代西桃
罗帆
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Shanghai Huawei Technologies Co Ltd
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Shanghai Huawei Technologies Co Ltd
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Priority to CN201811008063.6A priority Critical patent/CN110875760B/en
Priority to PCT/CN2019/090564 priority patent/WO2020042712A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource

Abstract

The embodiment of the application discloses a communication method and a device, wherein the method comprises the following steps: the first base station receives first data sent by a server; the first base station sends first coordination information to the second base station in a first special symbol of a first subframe; the first base station receives second coordination information sent by the second base station in a second special symbol of a third subframe, wherein the second subframe is later than the first subframe and the third subframe; the first base station transmits first data to the terminal using the time-frequency resource block. The first base station and the second base station can directly use subframes in the air interface resources to mutually send coordination information without using other forwarding equipment for forwarding, so that the negotiation speed between the first base station and the second base station is faster, the first base station and the second base station can jointly send the first data and the second data to the terminal more quickly, and the transmission delay of the first base station and the second base station to jointly send the data to the terminal is reduced.

Description

Communication method and device
Technical Field
The embodiment of the application relates to the technical field of communication, in particular to a communication method and device.
Background
At present, in the process of deploying base stations, signal coverage areas of two adjacent base stations generally have signal overlapping areas, and a terminal located in each signal overlapping area can simultaneously receive useful signals of a main base station and interference signals of auxiliary base stations, so that the quality of received signals of the terminal located in each signal overlapping area is poor, and network experience is affected.
In order to improve the quality of the received signal of the terminal, the joint transmission (joint transmission, JT) technique may provide signals to the terminal through the primary base station and the secondary base station at the same time, so that the primary base station and the secondary base station transmit data provided by the server to the terminal.
Before the main base station and the auxiliary base station send data to the terminal through the joint transmission technology, the main base station and the auxiliary base station need to mutually send coordination information to carry out negotiation. In the process that the main base station transmits coordination information to the auxiliary base station, the main base station can transmit the coordination information to the auxiliary base station by utilizing a plurality of forwarding devices to forward; similarly, in the process that the auxiliary base station sends the coordination information to the main base station, the auxiliary base station also needs to utilize a plurality of forwarding devices to forward so as to send the coordination information to the main base station.
Therefore, in the process that the main base station and the auxiliary base station mutually send the coordination information, the coordination information needs to be forwarded by utilizing a plurality of forwarding devices, so that the transmission time delay of the combined data sending of the main base station and the auxiliary base station to the terminal is improved.
Disclosure of Invention
The embodiment of the application provides a communication method and a communication device, which can reduce transmission delay in the process that a first base station and a second base station mutually send coordination information.
The embodiment of the application is realized in the following way:
in a first aspect, an embodiment of the present application provides a communication method, including: the first base station receives first data sent by a server; the first base station sends first coordination information to the second base station in a first special symbol of a first subframe, and the first coordination information indicates the second base station to reserve a first number of time-frequency resource blocks in the second subframe; the first base station receives second coordination information sent by a second base station in a second special symbol of a third subframe, the second coordination information indicates the second base station to reserve a first number of time-frequency resource blocks at a first time-frequency position in the second subframe, and the second subframe is later than the first subframe and the third subframe; the first base station transmits first data to the terminal using the time-frequency resource block.
In the first aspect, the first base station and the second base station can directly use subframes in the air interface resources to mutually send coordination information without using other forwarding equipment to forward, so that the negotiation speed between the first base station and the second base station is faster, the first base station and the second base station can jointly send the first data and the second data to the terminal more quickly, and the transmission delay of the first base station and the second base station to jointly send the data to the terminal is reduced.
In one possible implementation, before the first base station sends the first coordination information to the second base station in the first special symbol of the first subframe, the method further includes: the first base station determines the 2 multiplied by i-1 special symbol in a target time period as a first special symbol set, i is a positive integer, the target time period at least comprises a first subframe and a third subframe, the first special symbol set comprises at least one first special symbol, the at least one first special symbol comprises the first special symbol of the first subframe, and the at least one first special symbol is used for the first base station to send first coordination information to the second base station.
In one possible implementation, before the first base station sends the first coordination information to the second base station in the first special symbol of the first subframe, the method further includes: the first base station determines a 2 x i special symbol in a target time period as a second special symbol set, wherein the second special symbol set comprises at least one second special symbol, the at least one second special symbol comprises a second special symbol of a third subframe, the at least one second special symbol is used for the second base station to send second coordination information or third coordination information to the first base station, and the third coordination information indicates that the second base station refuses the indication of the first coordination information; the first base station transmits the second set of special symbols to the second base station.
In order to avoid that the first base station or the second base station both transmits coordination information and receives coordination information in one special symbol, the first base station may determine the 2×i-1 st special symbol in the target period as a first special symbol set, and determine the 2×i-1 nd special symbol in the target period as a second special symbol set, so that the first base station may transmit the first coordination information to the second base station by using at least one first special symbol in the first special symbol set, and the second base station may transmit the second coordination information or the third coordination information to the first base station by using at least one second special symbol in the second special symbol set. Therefore, the embodiment can ensure that the first base station or the second base station only transmits the coordination information or only receives the coordination information in one special symbol, so that the problem of signal interference can be avoided.
In a second aspect, embodiments of the present application provide a communication method, including: the second base station receives second data sent by the server; the second base station receives first coordination information sent by the first base station in a first special symbol of a first subframe, wherein the first coordination information indicates the second base station to reserve a first number of time-frequency resource blocks in the second subframe; the second base station sends second coordination information to the first base station in a second special symbol of a third subframe, the second coordination information indicates the second base station to reserve a first number of time-frequency resource blocks at a first time-frequency position in the second subframe, and the second subframe is later than the first subframe and the third subframe; the second base station transmits second data to the terminal using the time-frequency resource block.
In the second aspect, the first base station and the second base station can directly use subframes in the air interface resources to send coordination information to each other, and other forwarding devices are not needed to be used for forwarding, so that the negotiation speed between the first base station and the second base station is faster, the first base station and the second base station can send the first data and the second data to the terminal in a combined way, and the transmission delay of the first base station and the second base station for sending the data to the terminal in a combined way is reduced.
In one possible implementation, before the second base station receives the first coordination information sent by the first base station in the first special symbol of the first subframe, the method further includes: the second base station determines a 2 x i special symbol in a target time period as a second special symbol set, i is a positive integer, the target time period at least comprises a first subframe and a third subframe, the second special symbol set comprises at least one second special symbol, the at least one second special symbol comprises a second special symbol of the third subframe, the at least one second special symbol is used for the second base station to send second coordination information or third coordination information to the first base station, and the third coordination information indicates that the second base station refuses the indication of the first coordination information.
In one possible implementation, before the second base station receives the first coordination information sent by the first base station in the first special symbol of the first subframe, the method further includes: the second base station determines the 2 multiplied by i-1 special symbol in the target time period as a first special symbol set, wherein the first special symbol set comprises at least one first special symbol, the at least one first special symbol comprises a first special symbol of a first subframe, and the at least one first special symbol is used for the first base station to send first coordination information to the second base station; the second base station transmits the first set of special symbols to the first base station.
In order to avoid that the first base station or the second base station transmits coordination information and receives coordination information in one special symbol, the second base station can determine the 2 x i-1 th special symbol in the target time period as a first special symbol set, and determine the 2 x i-1 th special symbol in the target time period as a second special symbol set, so that the first base station transmits the first coordination information to the second base station by using at least one first special symbol in the first special symbol set, and the second base station transmits the second coordination information or the third coordination information to the first base station by using at least one second special symbol in the second special symbol set. Therefore, the embodiment can ensure that the first base station or the second base station only transmits the coordination information or only receives the coordination information in one special symbol, so that the problem of signal interference can be avoided.
In a third aspect, an embodiment of the present application provides a base station, including: the receiving module is used for receiving the first data sent by the server; a transmitting module, configured to transmit first coordination information to a second base station in a first special symbol of a first subframe, where the first coordination information indicates the second base station to reserve a first number of time-frequency resource blocks in the second subframe; the receiving module is further configured to receive second coordination information sent by the second base station in a second special symbol of the third subframe, where the second coordination information indicates that the second base station reserves a first number of time-frequency resource blocks at a first time-frequency position in the second subframe, and the second subframe is later than the first subframe and the third subframe; and the sending module is also used for sending the first data to the terminal by using the time-frequency resource block.
In one possible implementation, the base station further includes a determination module. The determining module is configured to determine a 2×i-1 st special symbol in a target time period as a first special symbol set, where i is a positive integer, where the target time period at least includes a first subframe and a third subframe, the first special symbol set includes at least one first special symbol, the at least one first special symbol includes a first special symbol of the first subframe, and the at least one first special symbol is used by a first base station to send first coordination information to a second base station.
In one possible implementation manner, the determining module is further configured to determine a 2χ i special symbol in the target time period as a second special symbol set, where the second special symbol set includes at least one second special symbol, and the at least one second special symbol includes a second special symbol of a third subframe, where the at least one second special symbol is used by the second base station to send second coordination information or third coordination information to the first base station, where the third coordination information indicates that the second base station rejects an indication of the first coordination information; and the sending module is also used for sending the second special symbol set to the second base station.
In a fourth aspect, an embodiment of the present application provides a base station, including: the receiving module is used for receiving the second data sent by the server; the receiving module is further configured to receive first coordination information sent by the first base station in a first special symbol of the first subframe, where the first coordination information indicates the second base station to reserve a first number of time-frequency resource blocks in the second subframe; a transmitting module, configured to transmit second coordination information to the first base station in a second special symbol of the third subframe, where the second coordination information indicates that the second base station reserves a first number of time-frequency resource blocks at a first time-frequency position in the second subframe, and the second subframe is later than the first subframe and the third subframe; and the sending module is also used for sending the second data to the terminal by using the time-frequency resource block.
In one possible implementation, the base station further includes a determination module. The determining module is configured to determine a 2×i-th special symbol in a target time period as a second special symbol set, where i is a positive integer, where the target time period at least includes a first subframe and a third subframe, the second special symbol set includes at least one second special symbol, the at least one second special symbol includes a second special symbol of the third subframe, and the at least one second special symbol is used by a second base station to send second coordination information or third coordination information to the first base station, and the third coordination information indicates that the second base station rejects an indication of the first coordination information.
In a possible implementation manner, the determining module is further configured to determine a 2×i-1 st special symbol in the target period as a first special symbol set, where the first special symbol set includes at least one first special symbol, and the at least one first special symbol includes a first special symbol of the first subframe, and the at least one first special symbol is used by the first base station to send first coordination information to the second base station; and the sending module is also used for sending the first special symbol set to the first base station.
In a fifth aspect, an embodiment of the present application provides a base station, including a baseband processing unit BBU, a remote radio unit RRU, a coupling circuit, and an antenna. The BBU is used for receiving first data sent by the server, and sending first coordination information to the second base station in a first special symbol of a first subframe by utilizing the RRU, the coupling circuit and the antenna, wherein the first coordination information indicates the second base station to reserve a first number of time-frequency resource blocks in the second subframe; receiving second coordination information sent by a second base station in a second special symbol of a third subframe by using the RRU, a coupling circuit and an antenna, wherein the second coordination information indicates the second base station to reserve a first number of time-frequency resource blocks at a first time-frequency position in the second subframe, and the second subframe is later than the first subframe and the third subframe; and transmitting the first data to the terminal by using the RRU, the coupling circuit and the antenna by using the time-frequency resource block.
In a sixth aspect, an embodiment of the present application provides a base station, including a baseband processing unit BBU, a remote radio unit RRU, a coupling circuit, and an antenna. The BBU is used for receiving second data sent by the server, and receiving first coordination information sent by the first base station in a first special symbol of a first subframe by utilizing the RRU, the coupling circuit and the antenna, wherein the first coordination information indicates the second base station to reserve a first number of time-frequency resource blocks in the second subframe; transmitting second coordination information to the first base station in a second special symbol of a third subframe by using the RRU, the coupling circuit and the antenna, wherein the second coordination information indicates the second base station to reserve a first number of time-frequency resource blocks at a first time-frequency position in the second subframe, and the second subframe is later than the first subframe and the third subframe; and transmitting second data to the terminal by using the RRU, the coupling circuit and the antenna and using the time-frequency resource block.
In a seventh aspect, embodiments of the present application provide a base station, including one or more processors and a memory; wherein the one or more processors are configured to read the software code stored in the memory and perform the methods as in the first aspect and the various implementations of the first aspect.
In an eighth aspect, embodiments of the present application provide a base station, including one or more processors and a memory; wherein the one or more processors are configured to read the software code stored in the memory and perform the method as in the second aspect and the various implementations of the second aspect.
In a ninth aspect, embodiments of the present application provide a computer-readable storage medium having instructions stored therein, which when run on a computer or processor, cause the computer or processor to perform the method of the first aspect or any one of the possible implementations of the first aspect.
In a tenth aspect, embodiments of the present application provide a computer-readable storage medium having instructions stored therein, which when run on a computer or processor, cause the computer or processor to perform the method of the second aspect or any one of the possible implementations of the second aspect.
In an eleventh aspect, embodiments of the present application provide a computer program product comprising instructions which, when run on a computer or processor, cause the computer or processor to perform the method of the first aspect or any one of the possible implementations of the first aspect.
In a twelfth aspect, embodiments of the present application provide a computer program product comprising instructions which, when run on a computer or processor, cause the computer or processor to perform the method of the second aspect or any one of the possible implementations of the second aspect.
Drawings
Fig. 1 is a schematic diagram of a scenario of joint transmission according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a radio frame according to an embodiment of the present application;
fig. 3 is a schematic diagram of a structure of a time-frequency resource block in one subframe in fig. 2;
FIG. 4 is a flow chart of a communication method according to an embodiment of the present application;
FIG. 5 is a flow chart illustrating another communication method according to an embodiment of the present application;
FIG. 6 is a flow chart illustrating yet another communication method according to an embodiment of the present application;
FIG. 7 is a flow chart illustrating yet another communication method according to an embodiment of the present application;
fig. 8 is a schematic diagram of a base station according to an embodiment of the present application
Fig. 9 is a schematic diagram of another base station according to an embodiment of the present application;
fig. 10 is a schematic diagram of yet another base station according to an embodiment of the present application;
Fig. 11 is a schematic diagram of yet another base station according to an embodiment of the present application.
Detailed Description
Referring to fig. 1 to fig. 3, fig. 1 is a schematic diagram of a joint transmission scenario provided in an embodiment of the present application, fig. 2 is a schematic diagram of a radio frame provided in an embodiment of the present application, and fig. 3 is a schematic diagram of a time-frequency resource block in a subframe in fig. 2.
The apparatus appearing in fig. 1 comprises a server 1, a first base station 2, a second base station 3 and a terminal 4. Wherein, the signal coverage area a of the first base station 2 and the signal coverage area B of the second base station 3 have a signal overlapping area C, and the terminal 4 is located in the signal overlapping area C.
Referring to fig. 1 to 3, a communication procedure between the server 1, the first base station 2, the second base station 3, and the terminal 4, which mainly involves a negotiation procedure between the first base station 2 and the second base station 3, will be briefly described.
First, when the server 1 needs to send the target data to the terminal 4, the server 1 splits the target data into first data and second data, sends the first data to the first base station 2, and sends the second data to the second base station 3. I.e. the server 1 instructs the first base station 2 and the second base station 3 to jointly transmit the first data and the second data, respectively, to the terminal 4.
Then, after the first base station 2 receives the first data sent by the server 1, the first base station 2 sends first coordination information to the second base station 3 in a Guard Period (GP) of the subframe 1, where the first coordination information indicates that the second base station 3 reserves 50 time-frequency resource blocks in the subframe 9.
Next, after the second base station 3 receives the first coordination information sent by the first base station 2 in the guard interval of the subframe 1, the second base station 3 determines whether the available number of time-frequency resource blocks in the subframe 9 is greater than or equal to 50. In this embodiment, the total number of time-frequency resource blocks in the subframe 9 is assumed to be 100, the time-frequency resource blocks that can be used in the subframe 9 are the 1 st to 50 th time-frequency resource blocks, and the time-frequency resource blocks that cannot be used in the subframe 9 are the 51 st to 100 th time-frequency resource blocks. The second base station 3 determines that the available number of time-frequency resource blocks in the subframe 9 is 50, and the second base station 3 determines the 1 st to 50 th time-frequency resource blocks in the subframe 9 as the first time-frequency position.
Again, the second base station 3 sends second coordination information to the first base station 2 in the guard interval of the subframe 6, where the second coordination information indicates that the second base station 3 reserves 50 time-frequency resource blocks at a first time-frequency position in the subframe 9, and the first time-frequency position is from the 1 st time-frequency resource block to the 50 th time-frequency resource block.
Finally, after the first base station 2 receives the second coordination information sent by the second base station 3 within the guard interval of the subframe 6, the first base station 2 and the second base station 3 negotiate successfully. The first base station 2 transmits first data to the terminal 4 at a first time-frequency position in the subframe 9, and the second base station 3 transmits second data to the terminal 4 at a first time-frequency position in the subframe 9, so that the first base station 2 and the second base station 3 jointly transmit the first data and the second data to the terminal 4.
In the embodiments shown in fig. 1 to 3, the subframes 1 and 6 belong to special subframes having a guard interval, and the guard interval in the subframe 1 and the guard interval in the subframe 6 are used to transmit coordination information transmitted between the first base station 2 and the second base station 3 each other; the subframe 9 belongs to a common subframe without a guard interval, and a time-frequency resource block in the subframe 9 is used for transmitting first data and second data respectively sent by the first base station 2 and the second base station 3 to the terminal 4. Of course, for the embodiments shown in fig. 1 to 3, the time-frequency resource blocks in the subframes 7 and 8 in fig. 2 may also transmit the first data and the second data respectively sent by the first base station 2 and the second base station 3 to the terminal 4.
In the embodiments shown in fig. 1 to fig. 3, the coordination information can be directly sent between the first base station 2 and the second base station 3 by using the subframes in the air interface resources, and other forwarding devices are not required to be used for forwarding, so that the negotiation speed between the first base station 2 and the second base station 3 is faster, and the first base station 2 and the second base station 3 can jointly send the first data and the second data to the terminal 4 more quickly, thereby reducing the transmission delay of the first base station 2 and the second base station 3 for jointly sending the data to the terminal 4.
In the embodiments shown in fig. 1 to 3, the embodiments of the present application use a radio frame structure of the fourth generation mobile communication technology, that is, a radio frame structure of a time division duplex (time division duplexing, TDD) type, and may also use other types of radio frame structures. For example, the embodiment of the present application may also use a radio frame structure of a fifth generation mobile communication technology, where flexible symbols (flexible) in subframes in the radio frame structure may be used to transmit coordination information that is sent between the first base station 2 and the second base station 3, where flexible symbols may not exist in one subframe, and where 1 or more flexible symbols may also exist in one subframe.
Fig. 1 to 3 illustrate a communication procedure among a server 1, a first base station 2, a second base station 3 and a terminal 4, and a detailed description of a communication method provided in an embodiment of the present application is started below.
Referring to fig. 4, fig. 4 is a flowchart of a communication method according to an embodiment of the present application. The communication method shown in fig. 4 can reduce the transmission delay of the data jointly transmitted to the terminal by the first base station and the second base station. The method shown in fig. 4 includes the following steps.
Step S11, the server sends first data and second data to the first base station and the second base station respectively.
The server splits the data to be jointly transmitted into first data and second data with the same size, and transmits the first data and the second data to the first base station and the second base station, so that the first base station and the second base station can jointly transmit the first data and the second data to the terminal.
Step S12, the first base station sends first coordination information to the second base station in a first special symbol of the first subframe.
After the first base station receives the first data sent by the server, the first base station sends first coordination information to the second base station in a first special symbol of a first subframe, and the first coordination information indicates the second base station to reserve a first number of time-frequency resource blocks in the second subframe.
For example, referring to the embodiment shown in fig. 1 to 3, it is assumed that the first base station 2 determines that the first data occupies 50 time-frequency resource blocks of one subframe, then the first base station 2 determines that the first base station 2 and the second base station 3 jointly transmit the first data and the second data to the terminal 4, and it is assumed that the first base station 2 determines 50 time-frequency resource blocks in the subframe 9, the first base station 2 transmits first coordination information to the second base station 3 in the guard interval of the subframe 1, and the first coordination information instructs the second base station 3 to reserve 50 time-frequency resource blocks in the subframe 9.
The first special symbol mentioned in step S12 may be a guard interval in one subframe in the radio frame structure of the fourth generation mobile communication technology, or may be a flexible symbol in one subframe in the radio frame structure of the fifth generation mobile communication technology.
Step S13, the second base station sends second coordination information to the first base station in a second special symbol of the third subframe.
After the second base station receives the first coordination information sent by the first base station in the first special symbol of the first subframe, the second base station may parse the first coordination information, and the second base station may learn that the first coordination information indicates the second base station to reserve a first number of time-frequency resource blocks in the second subframe. Then, the second base station reserves a first number of time-frequency resource blocks at a first time-frequency position in the second subframe according to the indication of the first coordination information, where the first time-frequency position in the second subframe indicates the position of the first number of time-frequency resource blocks reserved by the second base station. After the second base station reserves the time-frequency resource blocks, the second base station sends second coordination information to the first base station in a second special symbol of a third subframe, the second coordination information indicates the second base station to reserve a first number of time-frequency resource blocks at a first time-frequency position in the second subframe, and the second subframe is later than the first subframe and the third subframe.
For example, please refer to the embodiments shown in fig. 1 to 3, it is assumed that the first base station 2 transmits first coordination information to the second base station 3 in the guard interval of the subframe 1, and the first coordination information instructs the second base station 3 to reserve 50 time-frequency resource blocks in the subframe 9. After the second base station 3 receives the first coordination information sent by the first base station 2 in the guard interval of the subframe 1, the second base station 3 reserves the 1 st to 50 th time-frequency resource blocks in the subframe 9 according to the indication of the first coordination information, and the second base station 3 determines the 1 st to 50 th time-frequency resource blocks in the subframe 9 as the first time-frequency position. Then, the second base station 3 sends second coordination information to the first base station 2 in the guard interval of the subframe 6, where the second coordination information indicates that the second base station 3 reserves 50 time-frequency resource blocks at a first time-frequency position in the subframe 9, and the first time-frequency position is from the 1 st time-frequency resource block to the 50 th time-frequency resource block.
The second special symbol mentioned in step S13 may be a guard interval in one subframe in the radio frame structure of the fourth generation mobile communication technology, or may be a flexible symbol in one subframe in the radio frame structure of the fifth generation mobile communication technology.
Step S14, the first base station and the second base station jointly transmit the first data and the second data to the terminal by using a first number of time-frequency resource blocks reserved in a first time-frequency position in the second subframe.
After the first base station receives the second coordination information sent by the second base station in the second special symbol of the third subframe, the first base station and the second base station negotiate successfully. The first base station and the second base station can jointly send the first data and the second data to the terminal by using the first number of time-frequency resource blocks reserved in the first time-frequency position in the second subframe.
For example, in connection with the embodiments shown in fig. 1 to 3, it is assumed that after the first base station 2 receives the second coordination information sent by the second base station 3 within the guard interval of the subframe 6, the first base station 2 and the second base station 3 negotiate successfully. The first base station 2 transmits first data to the terminal 4 at a first time-frequency position in the subframe 9, and the second base station 3 transmits second data to the terminal 4 at a first time-frequency position in the subframe 9, so that the first base station 2 and the second base station 3 jointly transmit the first data and the second data to the terminal 4.
In the embodiment shown in fig. 4, the first base station and the second base station can directly use subframes in the air interface resources to send coordination information to each other, and no other forwarding equipment is needed to forward the coordination information, so that the negotiation speed between the first base station and the second base station is faster, and the first base station and the second base station can send the first data and the second data to the terminal in a combined way, thereby reducing the transmission delay of the first base station and the second base station sending the data to the terminal in a combined way.
Referring to fig. 5, fig. 5 is a flowchart illustrating another communication method according to an embodiment of the present application. The embodiment shown in fig. 5 is an extended embodiment based on the embodiment shown in fig. 2, i.e. the following steps may be further included before step S12 of fig. 2.
Step S21, the first base station determines the 2 multiplied by i-1 special symbol in the target time period as a first special symbol set.
Wherein i is a positive integer, the target time period at least comprises a first subframe and a third subframe, the first special symbol set comprises at least one first special symbol, the at least one first special symbol comprises a first special symbol of the first subframe, and the at least one first special symbol is used for the first base station to send first coordination information to the second base station.
For example, in the embodiment shown in fig. 1 to 3, it is assumed that the target period includes subframe 1 and subframe 6, the guard interval of subframe 1 is the 1 st special symbol, and the guard interval of subframe 6 is the 2 nd special symbol. The first base station determines the 1 st special symbol in the target time period as a first special symbol set, wherein the first special symbol set comprises the 1 st special symbol, namely the first special symbol set comprises a guard interval of the subframe 1, and the special symbols in the first special symbol set are used for the first base station 2 to send first coordination information to the second base station 3.
Step S22, the first base station determines the 2×i-th special symbol in the target period as the second special symbol set.
The second special symbol set comprises at least one second special symbol, the at least one second special symbol comprises a second special symbol of a third subframe, the at least one second special symbol is used for sending second coordination information or third coordination information to the first base station by the second base station, and the third coordination information indicates that the second base station refuses the indication of the first coordination information.
For example, in the embodiment shown in fig. 1 to 3, it is assumed that the target period includes subframe 1 and subframe 6, the guard interval of subframe 1 is the 1 st special symbol, and the guard interval of subframe 6 is the 2 nd special symbol. The first base station determines the 2 nd special symbol in the target time period as a second special symbol set, wherein the second special symbol set comprises the 2 nd special symbol, namely the second special symbol set comprises a guard interval of the subframe 6, and the special symbols in the second special symbol set are used for the second base station 3 to send second coordination information or third coordination information to the first base station 2.
Step S23, the first base station sends the second special symbol set to the second base station.
After the first base station determines the 2×i special symbols in the target period as the second special symbol set, in order to ensure that the second base station can send the second coordination information or the third coordination information by using the special symbols in the second special symbol set, the first base station needs to send the second special symbol set to the second base station.
In the embodiment shown in fig. 5, if the first base station or the second base station transmits and receives the coordination information within one special symbol, a problem of signal interference may occur within the special symbol. In order to avoid that the first base station or the second base station transmits coordination information and receives coordination information in one special symbol, the first base station may determine the 2 x i-1 th special symbol in the target period as a first special symbol set, and determine the 2 x i-1 th special symbol in the target period as a second special symbol set, so that the first base station transmits the first coordination information to the second base station by using at least one first special symbol in the first special symbol set, and the second base station transmits the second coordination information or the third coordination information to the first base station by using at least one second special symbol in the second special symbol set. Therefore, the embodiment shown in fig. 5 can ensure that the first base station or the second base station only transmits or only receives the coordination information in one special symbol, so that the problem of signal interference can be avoided.
Referring to fig. 6, fig. 6 is a flowchart of another communication method according to an embodiment of the present application. The embodiment shown in fig. 6 is an extended embodiment based on the embodiment shown in fig. 2, i.e. the following steps may be further included before step S12 of fig. 2.
Step S31, the second base station determines the 2×i-th special symbol in the target period as the second special symbol set.
Wherein i is a positive integer, the target time period at least includes a first subframe and a third subframe, the second special symbol set includes at least one second special symbol, the at least one second special symbol includes a second special symbol of the third subframe, the at least one second special symbol is used for the second base station to send second coordination information or third coordination information to the first base station, and the third coordination information indicates that the second base station refuses the indication of the first coordination information.
For example, in the embodiment shown in fig. 1 to 3, it is assumed that the target period includes subframe 1 and subframe 6, the guard interval of subframe 1 is the 1 st special symbol, and the guard interval of subframe 6 is the 2 nd special symbol. The second base station determines the 2 nd special symbol in the target time period as a second special symbol set, wherein the second special symbol set comprises the 2 nd special symbol, namely the second special symbol set comprises a guard interval of the subframe 6, and the special symbols in the second special symbol set are used for the second base station 3 to send second coordination information or third coordination information to the first base station 2.
Step S32, the second base station determines the 2 multiplied by i-1 special symbol in the target time period as a first special symbol set.
The first special symbol set comprises at least one first special symbol, the at least one first special symbol comprises a first special symbol of a first subframe, and the at least one first special symbol is used for a first base station to send first coordination information to a second base station.
For example, in the embodiment shown in fig. 1 to 3, it is assumed that the target period includes subframe 1 and subframe 6, the guard interval of subframe 1 is the 1 st special symbol, and the guard interval of subframe 6 is the 2 nd special symbol. The second base station determines the 1 st special symbol in the target time period as a first special symbol set, wherein the first special symbol set comprises the 1 st special symbol, namely the first special symbol set comprises a guard interval of the subframe 1, and the special symbols in the first special symbol set are used for the first base station 2 to send first coordination information to the second base station 3.
Step S33, the second base station sends the first special symbol set to the first base station.
After the second base station determines the 2×i-1 st special symbol in the target period as the first special symbol set, in order to ensure that the first base station can send the first coordination information by using the special symbols in the first special symbol set, the second base station needs to send the first special symbol set to the first base station.
In the embodiment shown in fig. 6, if the first base station or the second base station transmits and receives the coordination information within one special symbol, a problem of signal interference may occur within the special symbol. In order to avoid that the first base station or the second base station transmits coordination information and receives coordination information in one special symbol, the second base station may determine the 2 x i-1 th special symbol in the target period as a first special symbol set, and determine the 2 x i-1 th special symbol in the target period as a second special symbol set, so that the first base station transmits the first coordination information to the second base station by using at least one first special symbol in the first special symbol set, and the second base station transmits the second coordination information or the third coordination information to the first base station by using at least one second special symbol in the second special symbol set. Therefore, the embodiment shown in fig. 6 can ensure that the first base station or the second base station only transmits or only receives the coordination information in one special symbol, so that the problem of signal interference can be avoided.
Referring to fig. 7, fig. 7 is a flowchart of another communication method according to an embodiment of the present application. The communication method shown in fig. 7 can reduce the transmission delay of the data jointly transmitted to the terminal by the first base station and the second base station. The method shown in fig. 7 includes the following steps.
Step S41, the server sends first data and second data to the first base station and the second base station respectively.
Wherein step S41 is the same as step S11 in fig. 4, the explanation of step S11 can be referred to with respect to step S41 in the embodiment shown in fig. 4.
Step S42, the first base station sends the first coordination information to the second base station in the first special symbol of the first subframe.
Wherein step S42 is the same as step S12 in fig. 4, the explanation of step S12 can be referred to with respect to step S42 in the embodiment shown in fig. 4.
Step S43, the second base station judges whether the available number of the time-frequency resource blocks in the second subframe is larger than or equal to the first number. If yes, step S44 to step S46 are performed, otherwise step S47 is performed.
Step S44, the second base station determines a first number of time-frequency resource blocks at the first time-frequency position in the second subframe.
Step S45, the second base station transmits second coordination information to the first base station in the second special symbol of the third subframe.
In step S46, the first base station and the second base station jointly send the first data and the second data to the terminal by using the first number of time-frequency resource blocks reserved at the first time-frequency position in the second subframe.
The second coordination information indicates that the second base station reserves a first number of time-frequency resource blocks at a first time-frequency position in a second subframe, and the second subframe is later than the first subframe and the third subframe.
In order to better understand the steps S44 to S46, a detailed description will be given below by way of example.
For example, please refer to the embodiments shown in fig. 1 to 3, it is assumed that the first coordination information indicates that the second base station 3 reserves 50 time-frequency resource blocks in the subframe 9. After the second base station 3 receives the first coordination information sent by the first base station 2 in the guard interval of the subframe 1, the second base station 3 determines whether the available number of time-frequency resource blocks in the subframe 9 is greater than or equal to 50. In this embodiment, the total number of time-frequency resource blocks in the subframe 9 is assumed to be 100, the time-frequency resource blocks that can be used in the subframe 9 are the 1 st to 50 th time-frequency resource blocks, and the time-frequency resource blocks that cannot be used in the subframe 9 are the 51 st to 100 th time-frequency resource blocks. The second base station 3 determines that the available number of time-frequency resource blocks in the subframe 9 is 50, and the second base station 3 determines the 1 st to 50 th time-frequency resource blocks in the subframe 9 as the first time-frequency position. Then, the second base station 3 sends second coordination information to the first base station 2 in the guard interval of the subframe 6, where the second coordination information indicates that the second base station 3 reserves 50 time-frequency resource blocks at a first time-frequency position in the subframe 9, and the first time-frequency position is from the 1 st time-frequency resource block to the 50 th time-frequency resource block. Finally, after the first base station 2 receives the second coordination information sent by the second base station 3 within the guard interval of the subframe 6, the first base station 2 and the second base station 3 negotiate successfully. The first base station 2 transmits first data to the terminal 4 at a first time-frequency position in the subframe 9, and the second base station 3 transmits second data to the terminal 4 at a first time-frequency position in the subframe 9, so that the first base station 2 and the second base station 3 jointly transmit the first data and the second data to the terminal 4.
In step S47, the second base station sends third coordination information to the first base station in the second special symbol of the third subframe, where the third coordination information indicates that the second base station refuses the indication of the first coordination information.
In order to better understand step S47, the following description will be given in detail by way of example.
For example, please refer to the embodiments shown in fig. 1 to 3, it is assumed that the first coordination information indicates that the second base station 3 reserves 50 time-frequency resource blocks in the subframe 9. After the second base station 3 receives the first coordination information sent by the first base station 2 in the guard interval of the subframe 1, the second base station 3 determines whether the available number of time-frequency resource blocks in the subframe 9 is greater than or equal to 50. In this embodiment, the total number of time-frequency resource blocks in the subframe 9 is assumed to be 100, the time-frequency resource blocks that can be used in the subframe 9 are the 1 st to 40 th time-frequency resource blocks, and the time-frequency resource blocks that cannot be used in the subframe 9 are the 41 st to 100 th time-frequency resource blocks. The second base station 3 determines that the available number of time-frequency resource blocks in the subframe 9 is 40, which means that the second base station 3 cannot reserve 50 time-frequency resource blocks in the subframe 9, and the second base station 3 sends third coordination information to the first base station 2 in the guard interval of the subframe 6, where the third coordination information indicates that the second base station 3 refuses the indication of the first coordination information.
In the embodiment shown in fig. 7, the first base station and the second base station can directly use subframes in the air interface resource to send coordination information to each other, and no other forwarding equipment is needed to forward the coordination information, so that the negotiation speed between the first base station and the second base station is faster, and the first base station and the second base station can send the first data and the second data to the terminal in a combined way, thereby reducing the transmission delay of the first base station and the second base station sending the data to the terminal in a combined way. And the second base station judges whether the available number of the time-frequency resource blocks in the second subframe is larger than or equal to the first number, if so, the second base station agrees to jointly transmit data with the first base station to the terminal in the second subframe, otherwise, the second base station refuses to jointly transmit data with the first base station to the terminal in the second subframe.
Referring to fig. 8, fig. 8 is a schematic diagram of a base station according to an embodiment of the present application. The base station comprises the following modules:
and the receiving module 11 is used for receiving the first data sent by the server. For a specific implementation, please refer to the detailed description corresponding to step S11 in the method embodiment shown in fig. 4.
A transmitting module 12, configured to transmit first coordination information to the second base station in a first special symbol of the first subframe, where the first coordination information indicates the second base station to reserve a first number of time-frequency resource blocks in the second subframe. For a specific implementation, please refer to the detailed description corresponding to step S12 in the method embodiment shown in fig. 4.
The receiving module 11 is further configured to receive second coordination information sent by the second base station in a second special symbol of the third subframe, where the second coordination information indicates that the second base station reserves a first number of time-frequency resource blocks at a first time-frequency position in the second subframe, and the second subframe is later than the first subframe and the third subframe. For a specific implementation, please refer to the detailed description corresponding to step S13 in the method embodiment shown in fig. 4.
The sending module 12 is further configured to send the first data to the terminal using the time-frequency resource block. For a specific implementation, please refer to the detailed description corresponding to step S14 in the method embodiment shown in fig. 4.
In an implementation embodiment, the base station may further include a determining module 13, where the determining module 13 is configured to determine the 2×i-1 st special symbol in the target period as a first special symbol set, i is a positive integer, and the target period includes at least a first subframe and a third subframe, the first special symbol set includes at least one first special symbol, the at least one first special symbol includes a first special symbol of the first subframe, and the at least one first special symbol is used by the first base station to send the first coordination information to the second base station. For a specific implementation, please refer to the detailed description corresponding to step S21 in the method embodiment shown in fig. 5.
In an achievable embodiment, the determining module 13 is further configured to determine the 2×i special symbols in the target period as a second special symbol set, where the second special symbol set includes at least one second special symbol, and the at least one second special symbol includes a second special symbol of a third subframe, where the at least one second special symbol is used by the second base station to send second coordination information or third coordination information to the first base station, where the third coordination information indicates that the second base station rejects an indication of the first coordination information. The sending module 12 is further configured to send the second special symbol set to the second base station. For a specific implementation, please refer to the detailed description corresponding to step S22 and step S23 in the method embodiment shown in fig. 5.
Referring to fig. 9, fig. 9 is a schematic diagram of another base station according to an embodiment of the present application. The base station comprises the following modules:
and a receiving module 21, configured to receive the second data sent by the server. For a specific implementation, please refer to the detailed description corresponding to step S11 in the method embodiment shown in fig. 4.
The receiving module 21 is further configured to receive, in a first special symbol of the first subframe, first coordination information sent by the first base station, where the first coordination information indicates that the second base station reserves a first number of time-frequency resource blocks in the second subframe. For a specific implementation, please refer to the detailed description corresponding to step S12 in the method embodiment shown in fig. 4.
The sending module 22 is configured to send second coordination information to the first base station in a second special symbol of the third subframe, where the second coordination information indicates that the second base station reserves a first number of time-frequency resource blocks at a first time-frequency location in a second subframe, and the second subframe is later than the first subframe and the third subframe. For a specific implementation, please refer to the detailed description corresponding to step S13 in the method embodiment shown in fig. 4.
The sending module 22 is further configured to send the second data to the terminal using the time-frequency resource block. For a specific implementation, please refer to the detailed description corresponding to step S14 in the method embodiment shown in fig. 4.
In an implementation embodiment, the base station may further include a determining module 23, where the determining module 23 is configured to determine the 2×i special symbols in the target period as a second special symbol set, where i is a positive integer, and the target period includes at least a first subframe and a third subframe, where the second special symbol set includes at least one second special symbol, where the at least one second special symbol includes a second special symbol of the third subframe, where the at least one second special symbol is used by the second base station to send second coordination information or third coordination information to the first base station, and where the third coordination information indicates that the second base station rejects an indication of the first coordination information. For a specific implementation, please refer to the detailed description corresponding to step S31 in the method embodiment shown in fig. 6.
In an implementation embodiment, the determining module 23 is further configured to determine the 2×i-1 st special symbol in the target period as a first special symbol set, where the first special symbol set includes at least one first special symbol, where the at least one first special symbol includes a first special symbol of the first subframe, and where the at least one first special symbol is used by the first base station to send the first coordination information to the second base station; the sending module 22 is further configured to send the first special symbol set to the first base station. For a specific implementation, please refer to the detailed description corresponding to step S32 and step S33 in the method embodiment shown in fig. 6.
Referring to fig. 10, fig. 10 is a schematic diagram of another base station according to an embodiment of the present application. In the embodiment shown in fig. 10, the base station includes a baseband processing unit (BBU) 31, a remote radio unit (Remote Radio Unit, RRU) 32, a coupling circuit 33, and an antenna 34.
In the embodiment shown in fig. 10, the baseband processing unit 31 is configured to receive first data sent by the server, and send first coordination information to the second base station in a first special symbol of a first subframe by using the remote radio unit 32, the coupling circuit 33 and the antenna 34, where the first coordination information indicates that the second base station reserves a first number of time-frequency resource blocks in the second subframe; receiving, by using the remote radio unit 32, the coupling circuit 33, and the antenna 34, second coordination information sent by the second base station in a second special symbol of a third subframe, where the second coordination information indicates that the second base station reserves a first number of time-frequency resource blocks at a first time-frequency position in the second subframe, and the second subframe is later than the first subframe and the third subframe; the first data is transmitted to the terminal using the time-frequency resource blocks by means of the remote radio unit 32, the coupling circuit 33 and the antennas 34.
In the embodiment shown in fig. 10, when the base station transmits the first coordination information or the first data to the outside of the second base station or the terminal, the baseband processing unit 31 of the base station transmits the baseband signal with the first coordination information or the first data to the remote radio unit 32, the remote radio unit 32 converts the baseband signal into a radio signal, the remote radio unit 32 transmits the radio signal to the coupling circuit 33, the coupling circuit 33 performs filtering processing on the radio signal, and the coupling circuit 33 transmits the radio signal after the filtering processing to the second base station or the terminal through the antenna 34.
In the embodiment shown in fig. 10, when the base station receives the first data or the second coordination information sent by the server or the second base station, the antenna 34 of the base station receives the radio frequency signal with the first data or the second coordination information sent by the server or the second base station, the antenna 34 sends the radio frequency signal to the coupling circuit 33, the coupling circuit 33 performs filtering processing on the radio frequency signal, the coupling circuit 33 sends the radio frequency signal after the filtering processing to the remote radio unit 32, the remote radio unit 32 converts the radio frequency signal into a baseband signal, and the remote radio unit 32 sends the baseband signal to the baseband processing unit 31.
In the embodiment shown in fig. 10, for the execution of the base station, please refer to the detailed description corresponding to step S11 to step S14 in the method embodiment shown in fig. 4.
Referring to fig. 11, fig. 11 is a schematic diagram of another base station according to an embodiment of the present application. In the embodiment shown in fig. 11, the base station comprises a baseband processing unit 41, a remote radio unit 42, a coupling circuit 43 and an antenna 44.
In the embodiment shown in fig. 11, the baseband processing unit 41 is configured to receive second data sent by the server, and receive, using the remote radio unit 42, the coupling circuit 43, and the antenna 44, first coordination information sent by the first base station in a first special symbol of the first subframe, where the first coordination information indicates that the second base station reserves a first number of time-frequency resource blocks in the second subframe; transmitting second coordination information to the first base station in a second special symbol of a third subframe by using the remote radio unit 42, the coupling circuit 43 and the antenna 44, wherein the second coordination information indicates the second base station to reserve a first number of time-frequency resource blocks at a first time-frequency position in a second subframe, and the second subframe is later than the first subframe and the third subframe; the second data is transmitted to the terminal using the time-frequency resource blocks by means of the remote radio unit 42, the coupling circuit 43 and the antenna 44.
In the embodiment shown in fig. 11, when the base station transmits the second coordination information or the second data to the outside of the first base station or the terminal, the baseband processing unit 41 of the base station transmits the baseband signal with the second coordination information or the second data to the remote radio unit 42, the remote radio unit 42 converts the baseband signal into a radio signal, the remote radio unit 42 transmits the radio signal to the coupling circuit 43, the coupling circuit 43 performs filtering processing on the radio signal, and the coupling circuit 43 transmits the radio signal after the filtering processing to the first base station or the terminal through the antenna 44.
In the embodiment shown in fig. 11, when the base station receives the second data or the first coordination information sent by the server or the first base station, the antenna 44 of the base station receives the radio frequency signal with the second data or the first coordination information sent by the server or the first base station, the antenna 44 sends the radio frequency signal to the coupling circuit 43, the coupling circuit 43 performs filtering processing on the radio frequency signal, the coupling circuit 43 sends the radio frequency signal after the filtering processing to the remote radio unit 42, the remote radio unit 42 converts the radio frequency signal into a baseband signal, and the remote radio unit 42 sends the baseband signal to the baseband processing unit 41.
In the embodiment shown in fig. 11, for the execution of the base station, please refer to the detailed description corresponding to step S11 to step S14 in the method embodiment shown in fig. 4.
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present invention, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.

Claims (14)

1. A method of communication, the method comprising:
the first base station receives first data sent by a server;
the first base station sends first coordination information to a second base station in a first special symbol of a first subframe, wherein the first special symbol is a symbol which is not used for transmitting data with a terminal in the first subframe, the first coordination information indicates the second base station to reserve a first number of time-frequency resource blocks in the second subframe, and the time-frequency resource blocks are used for the first base station and the second base station to jointly send data to the terminal;
the first base station receives second coordination information sent by the second base station in a second special symbol of a third subframe, wherein the second special symbol is a symbol which is not used for transmitting data with the terminal in the third subframe, the second coordination information indicates the second base station to reserve the first number of time-frequency resource blocks at a first time-frequency position in the second subframe, and the second subframe is later than the first subframe and the third subframe;
and the first base station uses the time-frequency resource block to send the first data to the terminal.
2. The communication method of claim 1, wherein before the first base station transmits the first coordination information to the second base station within the first special symbol of the first subframe, the method further comprises:
The first base station determines a 2 x i-1 special symbol in a target time period as a first special symbol set, wherein i is a positive integer, the target time period at least comprises the first subframe and the third subframe, the first special symbol set comprises at least one first special symbol, the at least one first special symbol comprises the first special symbol of the first subframe, and the at least one first special symbol is used for the first base station to send the first coordination information to the second base station.
3. The communication method of claim 2, wherein before the first base station transmits the first coordination information to the second base station within the first special symbol of the first subframe, the method further comprises:
the first base station determines a 2×i special symbol in the target period as a second special symbol set, wherein the second special symbol set comprises at least one second special symbol, the at least one second special symbol comprises the second special symbol of the third subframe, the at least one second special symbol is used for the second base station to send second coordination information or third coordination information to the first base station, and the third coordination information indicates that the second base station refuses the indication of the first coordination information;
The first base station transmits the second special symbol set to the second base station.
4. A method of communication, the method comprising:
the second base station receives second data sent by the server;
the second base station receives first coordination information sent by a first base station in a first special symbol of a first subframe, wherein the first special symbol is a symbol which is not used for transmitting data with a terminal in the first subframe, the first coordination information indicates the second base station to reserve a first number of time-frequency resource blocks in the second subframe, and the time-frequency resource blocks are used for the first base station and the second base station to jointly send data to the terminal;
the second base station sends second coordination information to the first base station in a second special symbol of a third subframe, wherein the second special symbol is a symbol which is not used for transmitting data with the terminal in the third subframe, the second coordination information indicates the second base station to reserve the first number of time-frequency resource blocks at a first time-frequency position in the second subframe, and the second subframe is later than the first subframe and the third subframe;
and the second base station uses the time-frequency resource block to send the second data to the terminal.
5. The communication method of claim 4, wherein before the second base station receives the first coordination information transmitted by the first base station in the first special symbol of the first subframe, the method further comprises:
the second base station determines a 2×i special symbol in a target period as a second special symbol set, where i is a positive integer, the target period at least includes the first subframe and the third subframe, the second special symbol set includes at least one second special symbol, the at least one second special symbol includes the second special symbol of the third subframe, and the at least one second special symbol is used by the second base station to send the second coordination information or third coordination information to the first base station, and the third coordination information indicates that the second base station refuses the indication of the first coordination information.
6. The communication method of claim 5, wherein before the second base station receives the first coordination information transmitted by the first base station in the first special symbol of the first subframe, the method further comprises:
the second base station determines a 2 x i-1 th special symbol in the target time period as a first special symbol set, wherein the first special symbol set comprises at least one first special symbol, the at least one first special symbol comprises the first special symbol of the first subframe, and the at least one first special symbol is used for the first base station to send the first coordination information to the second base station;
The second base station transmits the first set of special symbols to the first base station.
7. A base station, comprising:
the receiving module is used for receiving the first data sent by the server;
a sending module, configured to send first coordination information to a second base station in a first special symbol of a first subframe, where the first special symbol is a symbol in the first subframe that is not used for transmitting data with a terminal, the first coordination information indicates that the second base station reserves a first number of time-frequency resource blocks in the second subframe, and the time-frequency resource blocks are used by the first base station and the second base station to jointly send data to the terminal;
the receiving module is further configured to receive second coordination information sent by the second base station in a second special symbol of a third subframe, where the second special symbol is a symbol in the third subframe that is not used for transmitting data with the terminal, the second coordination information indicates that the second base station reserves the first number of time-frequency resource blocks at a first time-frequency position in the second subframe, and the second subframe is later than the first subframe and the third subframe;
and the sending module is further configured to send the first data to the terminal by using the time-frequency resource block.
8. The base station of claim 7, further comprising:
a determining module, configured to determine a 2×i-1 st special symbol in a target time period as a first special symbol set, where i is a positive integer, where the target time period at least includes the first subframe and the third subframe, the first special symbol set includes at least one first special symbol, the at least one first special symbol includes the first special symbol of the first subframe, and the at least one first special symbol is used by the first base station to send the first coordination information to the second base station.
9. The base station of claim 8, wherein:
the determining module is further configured to determine a 2×i special symbol in the target period as a second special symbol set, where the second special symbol set includes at least one second special symbol, the at least one second special symbol includes the second special symbol of the third subframe, and the at least one second special symbol is used by the second base station to send the second coordination information or third coordination information to the first base station, where the third coordination information indicates that the second base station rejects the first coordination information;
The sending module is further configured to send the second special symbol set to the second base station.
10. A base station, comprising:
the receiving module is used for receiving the second data sent by the server;
the receiving module is further configured to receive first coordination information sent by a first base station in a first special symbol of a first subframe, where the first special symbol is a symbol in the first subframe that is not used for transmitting data with a terminal, the first coordination information indicates that a second base station reserves a first number of time-frequency resource blocks in a second subframe, and the time-frequency resource blocks are used for the first base station and the second base station to jointly send data to the terminal;
a sending module, configured to send second coordination information to the first base station in a second special symbol of a third subframe, where the second special symbol is a symbol in the third subframe that is not used for transmitting data with the terminal, the second coordination information indicates that the second base station reserves the first number of time-frequency resource blocks at a first time-frequency position in the second subframe, and the second subframe is later than the first subframe and the third subframe;
and the sending module is further configured to send the second data to the terminal by using the time-frequency resource block.
11. The base station of claim 10, further comprising:
a determining module, configured to determine a 2×i-th special symbol in a target period as a second special symbol set, where i is a positive integer, where the target period at least includes the first subframe and the third subframe, the second special symbol set includes at least one second special symbol, where the at least one second special symbol includes the second special symbol of the third subframe, and the at least one second special symbol is used by the second base station to send the second coordination information or third coordination information to the first base station, and the third coordination information indicates that the second base station refuses the indication of the first coordination information.
12. The base station of claim 11, wherein:
the determining module is further configured to determine a 2×i-1 st special symbol in the target period as a first special symbol set, where the first special symbol set includes at least one first special symbol, the at least one first special symbol includes the first special symbol of the first subframe, and the at least one first special symbol is used by the first base station to send the first coordination information to the second base station;
The sending module is further configured to send the first special symbol set to the first base station.
13. The base station is characterized by comprising a baseband processing unit BBU, a remote radio unit RRU, a coupling circuit and an antenna;
the BBU is configured to receive first data sent by a server, send first coordination information to a second base station in a first special symbol of a first subframe by using the RRU, the coupling circuit and the antenna, where the first special symbol is a symbol in the first subframe that is not used for transmitting data with a terminal, the first coordination information indicates that the second base station reserves a first number of time-frequency resource blocks in the second subframe, and the time-frequency resource blocks are used for the first base station and the second base station to jointly send data to the terminal; receiving second coordination information sent by the second base station in a second special symbol of a third subframe by using the RRU, the coupling circuit and the antenna, wherein the second special symbol is a symbol which is not used for transmitting data with the terminal in the third subframe, the second coordination information indicates the second base station to reserve the first number of time-frequency resource blocks at a first time-frequency position in the second subframe, and the second subframe is later than the first subframe and the third subframe; and transmitting the first data to the terminal by using the time-frequency resource block by using the RRU, the coupling circuit and the antenna.
14. The base station is characterized by comprising a baseband processing unit BBU, a remote radio unit RRU, a coupling circuit and an antenna;
the BBU is configured to receive second data sent by a server, and receive, by using the RRU, the coupling circuit, and the antenna, first coordination information sent by a first base station in a first special symbol of a first subframe, where the first special symbol is a symbol in the first subframe that is not used for transmitting data with a terminal, the first coordination information indicates that a second base station reserves a first number of time-frequency resource blocks in a second subframe, and the time-frequency resource blocks are used for the first base station and the second base station to jointly send data to the terminal; transmitting second coordination information to the first base station in a second special symbol of a third subframe by using the RRU, the coupling circuit and the antenna, wherein the second special symbol is a symbol which is not used for transmitting data with the terminal in the third subframe, the second coordination information indicates the first quantity of time-frequency resource blocks reserved by the second base station at a first time-frequency position in the second subframe, and the second subframe is later than the first subframe and the third subframe; and transmitting the second data to the terminal by using the time-frequency resource block by using the RRU, the coupling circuit and the antenna.
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