CN104753658A - Method and device for data transmission in simultaneous same-frequency full duplex system - Google Patents
Method and device for data transmission in simultaneous same-frequency full duplex system Download PDFInfo
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- CN104753658A CN104753658A CN201310741853.6A CN201310741853A CN104753658A CN 104753658 A CN104753658 A CN 104753658A CN 201310741853 A CN201310741853 A CN 201310741853A CN 104753658 A CN104753658 A CN 104753658A
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Abstract
The invention discloses a method and a device for data transmission in a simultaneous same-frequency full duplex system, which is used for solving problems of high system design difficulty and high signaling overhead caused by inexistence of reciprocity in an uplink/downlink channel in an existing simultaneous same-frequency full duplex transmission mode. The method comprises the steps of arranging a first device in a time slot N, sending data to at least one second device through antennas in a first group of antennas, and receiving data sent by at least one third device through antennas in a second group of antennas; and arranging the first device in a time slot N+T, receiving data sent by the at least one second device through the antennas in the first group of antennas, and sending data to the at least one third device through the antennas in the second group of antennas. According to the invention, a simultaneous same-frequency full duplex transmission mode is realized, and because the uplink/downlink channel generates the reciprocity, the first device is enabled to use the reciprocity generated by the uplink/downlink channel to carry out channel estimation, thereby saving the signalling overhead.
Description
Technical field
The present invention relates to communication technical field, the data transmission method while of particularly a kind of in co-channel full duplex system and device.
Background technology
Existing time division duplex (Time Division Duplex, TDD) in system, the antenna of base station namely for receiving the data that self terminal sends, also for sending data to terminal, at synchronization, same antenna is only for sending downstream signal or receiving upward signal.The radio architectures of base station is shown in Figure 1, controls this antenna of current time n(antenna in figure by control switch) be for sending downstream signal or receiving upward signal.Due to the reciprocity of uplink/downlink channel, channel information need not feed back to transmitting terminal from receiving terminal.Such as, terminal, at up transmission detectable signal, after base station obtains this detectable signal, using this detectable signal as descending channel information, thus carries out preliminary treatment to descending transmission signal.
Along with mobile Internet business amount rapidly increases, the capacity of TDD system and covering problem (especially focus and indoor) become increasingly conspicuous, one is the configuration mechanism needing to design uplink/downlink subframe more flexibly, to mate business uplink/downlink dynamic characteristic, two is the spectrum efficiencies needing to improve further TDD system, to strengthen network capacity.In order to improve the capacity of existing system, propose co-channel full duplex technology simultaneously, so-called co-channel full duplex technology simultaneously refers to, base station can send downstream signal simultaneously and receive upward signal in identical running time-frequency resource, thus can promote spectrum efficiency at double in theory.
Simultaneously in co-channel full duplex system, need to configure reception antenna and transmitting antenna respectively in base station side, to realize to send downstream signal and receive upward signal in identical running time-frequency resource simultaneously.In full duplex system, the radio architectures of base station is see shown in Fig. 2 A and Fig. 2 B, and as can be seen from the figure, the sendaisle of base station and receive path are independently, and the transmitting antenna of base station and reception antenna are also independently.In this case, there is not reciprocity in uplink/downlink channel, therefore, must by feedback for the channel information carrying out uplink/downlink channel estimating, transmitting terminal just can be known, thus considerably increases design difficulty and the signaling consumption of system.
Summary of the invention
The data transmission method while of embodiments providing a kind of in co-channel full duplex system and device, under solving existing full-duplex transmission mode, because uplink/downlink channel does not exist reciprocity, and the large and problem that signaling consumption is large of the system difficulty caused.
The data transmission method while of embodiments providing a kind of in co-channel full duplex system, the method comprises:
First equipment, in time slot N, by least one second equipment sending data of the sky alignment in first group of antenna, and receives the data of at least one the 3rd equipment transmission by the antenna in second group of antenna;
Described first equipment, in time slot N+T, receives the data of at least one second equipment transmission described by the antenna in first group of antenna, and by least one the 3rd equipment sending data described in the sky alignment in second group of antenna;
Wherein, all antennas of described first equipment are divided into two groups, and the antenna that described first group of antenna comprises with described second group of antenna is not identical; N, T are integer, and T is time offset.
The method that the embodiment of the present invention provides, achieves the transmission mode of simultaneously co-channel full duplex, and creates reciprocity due to uplink/downlink channel, and the first equipment can utilize the reciprocity of uplink/downlink channel to carry out channel estimating, thus saves signaling consumption.
In force, due to when the transformation period of channel is less than the coherence time of channel, the conversion of channel is negligible, and preferably, the value of described T is less than the coherence time of channel.
In force, as the preferred implementation of one, described first equipment is base station, the same terminal that described second equipment and described 3rd equipment are served for described base station; Or,
Described first equipment is base station, and described second equipment and described 3rd equipment are respectively the different terminals of serving described base station.
In force, as the preferred implementation of another kind, described first equipment is terminal, and described second equipment and described 3rd equipment are the current base station be connected of described terminal.
Based on above-mentioned any embodiment, in force, described method also comprises:
The data that described first equipment sends according to described 3rd equipment received in time slot N, obtain channel estimating; And,
Described first equipment, according to described channel estimating, determines the data needing to send to described 3rd equipment at time slot N+T.
Based on same inventive concept, the data transmission device while of additionally providing a kind of in the embodiment of the present invention in co-channel full duplex system, this device comprises:
First transmission control module, in time slot N, by least one second equipment sending data of the sky alignment in first group of antenna, and receives the data of at least one the 3rd equipment transmission by the antenna in second group of antenna;
Second transmission control module, in time slot N+T, receives the data of at least one second equipment transmission described by the antenna in first group of antenna, and by least one the 3rd equipment sending data described in the sky alignment in second group of antenna;
Wherein, all antennas of described base station are divided into two groups, and the antenna that described first group of antenna comprises with described second group of antenna is not identical; N, T are integer, and T is time offset.
The device that the embodiment of the present invention provides, achieves the transmission mode of simultaneously co-channel full duplex, and creates reciprocity due to uplink/downlink channel, and the first equipment can utilize the reciprocity of uplink/downlink channel to carry out channel estimating, thus saves signaling consumption.
In force, due to when the transformation period of channel is less than the coherence time of channel, the conversion of channel is negligible, and preferably, the value of time off-set T is less than the coherence time of channel.
In force, as the preferred implementation of one, described device is base station, the same terminal that described second equipment and described 3rd equipment are served for described base station; Or,
Described device is base station, and described second equipment and described 3rd equipment are respectively the different terminals of serving described base station.
In force, as the preferred implementation of another kind, described device is terminal, and described second equipment and described 3rd equipment are the current base station be connected of described terminal.
Based on above-mentioned any embodiment, in force, described base station also comprises:
Channel estimation module, for the data sent according to described 3rd equipment received in time slot N, obtains channel estimating; And, according to described channel estimating, determine the data needing to send to described 3rd equipment at time slot N+T.
Based on same inventive concept, additionally provide the data transmission device in another kind of co-channel full duplex system simultaneously in the embodiment of the present invention, this device comprises:
The output of each sendaisle of described device arranges a change over switch, and the input of each receive path of described device arranges a change over switch, wherein, the other end of each described change over switch is connected with an antenna in second group of antenna of an antenna in first group of antenna of described device and described device respectively, and described device transmits as follows by controlling each described change over switch:
In time slot N, by least one second equipment sending data of the sky alignment in first group of antenna, and received the data of at least one the 3rd equipment transmission by the antenna in second group of antenna;
In time slot N+T, received the data of at least one second equipment transmission described by the antenna in first group of antenna, and by least one the 3rd equipment sending data described in the sky alignment in second group of antenna;
Wherein, all antennas of described first equipment are divided into two groups, and the antenna that described first group of antenna comprises with described second group of antenna is not identical; N, T are integer, and T is time offset.
The device that the embodiment of the present invention provides, achieves the transmission mode of simultaneously co-channel full duplex, and creates reciprocity due to uplink/downlink channel, and the first equipment can utilize the reciprocity of uplink/downlink channel to carry out channel estimating, thus saves signaling consumption.
In force, as the preferred implementation of one, described device is base station, the same terminal that described second equipment and described 3rd equipment are served for described base station; Or,
Described device is base station, and described second equipment and described 3rd equipment are respectively the different terminals of serving described base station.
In force, as the preferred implementation of another kind, described device is terminal, and described second equipment and described 3rd equipment are the current base station be connected of described terminal.
Accompanying drawing explanation
Fig. 1 is the radio architectures schematic diagram of the base station in background technology in TDD system;
Fig. 2 A is the simultaneously transmission radio architectures schematic diagram of base station in co-channel full duplex system in background technology
Fig. 2 B is the simultaneously received RF configuration diagram of base station in co-channel full duplex system in background technology;
Fig. 3 be provided by the invention a kind of while co-channel full duplex system in the schematic flow sheet of data transmission method;
Fig. 4 be provided by the invention a kind of while co-channel full duplex system in the schematic diagram of data transmission device;
Fig. 5 A is the transfer of data schematic diagram in embodiment one provided by the invention in time slot N;
Fig. 5 B is the transfer of data schematic diagram in embodiment one provided by the invention in time slot N+T.
Embodiment
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.Should be appreciated that embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Shown in Figure 3, the data transmission method while that the embodiment of the present invention being a kind of in co-channel full duplex system, the method comprises the following steps:
Step 31, the first equipment, in time slot N, by least one second equipment sending data of the sky alignment in first group of antenna, and receive the data of at least one the 3rd equipment transmission by the antenna in second group of antenna; Wherein, N is integer.
Concrete, in time slot N, this first equipment respectively to each second equipment sending data, and receives by each antenna in second group of antenna the data that each 3rd equipment sends by each antenna in first group of antenna respectively, thus in time slot N, achieve the transmission mode of full duplex.
In the embodiment of the present invention, all antennas of the first equipment are divided into two groups, wherein, first group of antenna is not identical with the antenna that second group of antenna comprises.
Step 32, the first equipment, in time slot N+T, receive the data of this at least one second equipment transmission by the antenna in first group of antenna, and by this at least one the 3rd equipment sending data of sky alignment in second group of antenna; Wherein, T is time offset, and T is integer.
Concrete, in time slot N+T, this first equipment receives the data of each second equipment transmission respectively by each antenna in first group of antenna, and by each antenna in second group of antenna respectively to each 3rd equipment sending data, thus in time slot N+T, achieve the transmission mode of full duplex.
It should be noted that, the technical scheme that theres is provided of the embodiment of the present invention for convenience of explanation, employ the printed words of " the first equipment ", " the second equipment ", " the 3rd equipment ", different equipment is distinguished, but the quantity of equipment, type and operator precedence level are not limited.
In the embodiment of the present invention, for same second equipment, the first equipment use same antenna respectively in time slot N to this second equipment sending data and receive in time slot N+T this second equipment send data;
For same 3rd equipment, the first equipment use same antenna receives the data of the 3rd equipment transmission respectively and sends data at time slot N+T to this second terminal in time slot N.
In the embodiment of the present invention, the first equipment, in time slot N, by least one second equipment sending data of the sky alignment in first group of antenna, and receives the data of at least one the 3rd equipment transmission by the antenna in second group of antenna; And, first equipment is in time slot N+T, the data of this at least one second equipment transmission are received by the antenna in first group of antenna, and by this at least one the 3rd equipment sending data of sky alignment in second group of antenna, thus achieve the transmission mode of co-channel full duplex simultaneously; Further, because uplink/downlink channel creates reciprocity, the reciprocity that the first equipment can utilize uplink/downlink channel to produce, carries out channel estimating, thus saves signaling consumption.
In force, due to when the transformation period of channel is less than the coherence time of channel, the conversion of channel is negligible, and preferably, the value of time off-set T is less than the coherence time of channel.
Concrete, the inverse of doppler spread can be expressed as the coherence time of channel, the inverse of the frequency values that the Doppler frequency spectrum that namely this channel is corresponding is expanded.Such as, suppose that Doppler frequency spectrum extends 10KHz, be then 0.1ms(millisecond the coherence time of channel).
In force, the first equipment can base station, also can be terminal, specifically comprise following three kinds of preferred implementations:
Mode 1, first equipment is base station, the same terminal that the second equipment and the 3rd equipment are served for this base station.
Under which, step 31 is specially: base station is in time slot N, send downstream signal by least one terminal of serving belonging to this base station of sky alignment in first group of antenna of this base station, and receive the upward signal of this at least one terminal transmission by the antenna in second group of antenna of this base station;
Accordingly, for each terminal in this at least one terminal, this terminal is in time slot N, the downstream signal of this base station transmission is received by the antenna in first group of antenna of this terminal, and send upward signal by this base station of sky alignment in second group of antenna of this terminal, wherein, this terminal needs to improve on existing structure, receive downstream signal simultaneously to enable this terminal and send upward signal, namely all antennas of this terminal are also divided into two groups, and first of this terminal group of antenna is not identical with the antenna that second group of antenna comprises.
Step 32 is specially: base station, in time slot N+T, receives the upward signal of this at least one terminal transmission by the antenna in first group of antenna, and sends downstream signal by this at least one terminal of sky alignment in second group of antenna;
Accordingly, for each terminal in this at least one terminal, this terminal, in time slot N+T, sends upward signal by this base station of sky alignment in first group of antenna of this terminal, and receives the downstream signal of this base station transmission by the antenna in second group of antenna of this terminal.
Under which, for the same terminal that base station is served, this base station can realize sending downstream signal simultaneously and receiving upward signal; Accordingly, for this terminal, this terminal also can realize sending upward signal simultaneously and receiving downstream signal.Because base station and terminal can realize sending downstream signal and receiving upward signal simultaneously, thus improve spectrum efficiency at double.
Mode 2, first equipment is base station, the different terminals that second equipment and the 3rd equipment are served for this base station (is designated as first terminal and the second terminal, here " first " and " second ", just in order to distinguish the different terminals that this base station is served, does not limit the quantity of terminal and type).
Under which, step 31 is specially: base station is in time slot N, send downstream signal by least one first terminal of sky alignment in first group of antenna of this base station, and receive the upward signal of at least one second terminal transmission by the antenna in second group of antenna of this base station.
Accordingly, for each first terminal in this at least one first terminal, this first terminal, in time slot N, receives the downstream signal that base station sends; And each second terminal for this at least one second terminal, this second terminal, in time slot N, sends upward signal to base station.
Step 32 is specially: base station, in time slot N+T, receives the upward signal of this at least one first terminal transmission by the antenna in first group of antenna, and sends downstream signal by this at least one second terminal of the sky alignment in second group of antenna.
Accordingly, for each first terminal in this at least one first terminal, this first terminal, in time slot N+T, sends upward signal to this base station; And each second terminal for this at least one second terminal, this second terminal, in time slot N+T, receives the downstream signal that this base station sends.
Under which, for any two different terminals, base station can realize sending downstream signal (namely sending downstream signal to first terminal or the second terminal) simultaneously and receiving upward signal (namely receiving the upward signal of the second terminal or first terminal transmission).For first terminal or the second terminal, can not existing structure be changed, realize sending upward signal and receiving downstream signal in the different moment.Because base station can realize sending downstream signal and receiving upward signal simultaneously, thus improve spectrum efficiency at double.
Mode 3, first equipment is terminal, and the second equipment and the 3rd equipment are the current base station be connected of this terminal.
Under which, step 31 is specially: terminal, in time slot N, sends upward signal by the base station belonging to this terminal of sky alignment in first group of antenna of this terminal, and receives the downstream signal of this base station transmission by the antenna in second group of antenna of this terminal.
Accordingly, the base station belonging to this terminal in time slot N, the upward signal sent by antenna receiving terminal in first group of antenna of this base station; And, downstream signal is sent by this terminal of sky alignment in second group of antenna of this base station, wherein, this base station needs to improve on existing structure, receive upward signal simultaneously to enable this base station and send downstream signal, namely all antennas of this base station are also divided into two groups, and first of this base station group of antenna is not identical with the antenna that second group of antenna comprises.
Step 32 is specially: terminal, in time slot N+T, is received the downstream signal of the base station transmission belonging to this terminal, and sends upward signal by this base station of sky alignment in second group of antenna of this terminal by the antenna in first group of antenna of this terminal.
Accordingly, the base station belonging to this terminal, in time slot N+T, sends downstream signal by first group of this terminal of sky alignment of this base station; And, the upward signal of this terminal transmission is received by second group of antenna of this base station.
Under which, because base station and terminal can realize sending downstream signal and receiving upward signal simultaneously, thus improve spectrum efficiency at double.
Based on above-mentioned any embodiment, in force, after step 31, and before step 32, the method also comprises:
The data that first equipment sends according to the 3rd equipment received in time slot N, obtain channel estimating; And,
First equipment, according to the channel estimating got, determines the data needing to send to the 3rd equipment at time slot N+T.
2 be example in the above described manner below, carry out channel estimating to the reciprocity of the first equipment utilization up/down channel and be described in detail, other situations are similar, illustrate no longer one by one herein.
Under which, the upward signal that base station sends according to the second terminal received in time slot N, obtains uplink channel estimation; And the downstream signal needing to send to this second terminal at time slot N+T, according to the uplink channel estimation got, is determined in base station.
Concrete, in time slot N, the transmitting antenna (i.e. first group of antenna) of base station is H1 to the channel matrix of the antenna of any one first terminal, and this matrix H 1 is M1 × T
n1dimension, wherein, M1 is the antenna number of this first terminal, T
n1for the number of antenna comprised in first group of antenna of base station; The antenna of any one the second terminal is to the channel matrix H 2 of the reception antenna (i.e. second group of antenna) of base station, and this matrix H 2 is T
n2× M2 dimension, wherein, M2 is the antenna number of this second terminal, T
n2for the number of antenna comprised in second group of antenna of base station;
In time slot N+T, according to the reciprocity of channel, the transmitting antenna (i.e. second group of antenna) of base station is H2 to the channel matrix of the antenna of any one the second terminal, and this matrix H 2 is M2 × T
n2dimension, wherein, M2 is the antenna number of this second terminal, the number of the antenna comprised in second group of antenna that Tn2 is base station; The antenna of any one first terminal is to the channel matrix H 1 of the reception antenna (i.e. first group of antenna) of base station, and this matrix H 1 is T
n1× M1 dimension, wherein, M1 is the antenna number of this first terminal, T
n1for the number of antenna comprised in first group of antenna of base station.
In the embodiment of the present invention, the ratio that transtation mission circuit (i.e. sendaisle) response corresponding to every root antenna of base station and receiving circuit (i.e. receive path) respond is all identical, to ensure that base station can utilize the reciprocity of channel, carries out channel estimating.
Said method handling process can realize with software program, and this software program can be stored in storage medium, when the software program stored is called, performs said method step.
Based on same inventive concept, the data transmission device while of additionally providing a kind of in the embodiment of the present invention in co-channel full duplex system, the data transmission method while of the principle of dealing with problems due to this device and a kind of shown in above-mentioned Fig. 3 in co-channel full duplex system is similar, therefore the enforcement of this device see the enforcement of method, can repeat part and repeats no more.
Shown in Figure 4, the embodiment of the present invention provide a kind of while co-channel full duplex system in data transmission device 4, comprising:
First transmission control module 41, in time slot N, by least one second equipment sending data of the sky alignment in first group of antenna, and receives the data of at least one the 3rd equipment transmission by the antenna in second group of antenna;
Second transmission control module 42, in time slot N+T, receives the data of this at least one second equipment transmission by the antenna in first group of antenna, and by this at least one the 3rd equipment sending data of sky alignment in second group of antenna;
Wherein, all antennas of this device are divided into two groups, and first group of antenna is different with the antenna that second group of antenna comprises; N, T are integer, and T is time offset.
Concrete, in time slot N, first transmission control module 41 respectively to each second equipment sending data, and receives by each antenna in second group of antenna the data that each 3rd equipment sends by each antenna in first group of antenna respectively, thus in time slot N, achieve the transmission mode of full duplex; In time slot N+T, second transmission control module 42 receives the data of each second equipment transmission respectively by each antenna in first group of antenna, and by each antenna in second group of antenna respectively to each 3rd equipment sending data, thus in time slot N+T, achieve the transmission mode of full duplex.
In the embodiment of the present invention, for same second equipment, the first transmission control module 41 and the second transmission control module 42 use same antenna respectively in time slot N to this second equipment sending data and receive in time slot N+T this second equipment send data; For same 3rd equipment, the first transmission control module 41 and the second transmission control module 42 use same antenna in time slot N, receive the data of the 3rd equipment transmission respectively and send data at time slot N+T to this second terminal.
The device that the embodiment of the present invention provides, can realize the transmission mode of co-channel full duplex simultaneously, and, because uplink/downlink channel creates reciprocity, the reciprocity that this device can utilize uplink/downlink channel to produce, carries out channel estimating, thus saves signaling consumption.
In force, due to when the transformation period of channel is less than the coherence time of channel, the conversion of channel is negligible, and preferably, the value of time off-set T is less than the coherence time of channel.
In force, the present invention is that provided device can base station, also can be terminal, specifically comprise following three kinds of preferred implementations:
Mode 1, the present invention are provided devices is base station, the same terminal that the second equipment and the 3rd equipment are served for this base station.
Under which, because base station and terminal can realize sending downstream signal and receiving upward signal simultaneously, thus improve spectrum efficiency at double, specifically see the description of the mode 1 in said method part, repeat no more herein.
Mode 2, the present invention are provided devices is base station, the different terminals that the second equipment and the 3rd equipment are served for this base station.
Under which, because base station can realize sending downstream signal and receiving upward signal simultaneously, thus improve spectrum efficiency at double, specifically see the description of the mode 2 in said method part, repeat no more herein.
Mode 3, the present invention are provided devices is terminal, and the second equipment and the 3rd equipment are the current base station be connected of this terminal.
Under which, because base station and terminal can realize sending downstream signal and receiving upward signal simultaneously, thus improve spectrum efficiency at double, specifically see the description of the mode 3 in said method part, repeat no more herein.
Based on above-mentioned any embodiment, in force, this device 4 also comprises:
Channel estimation module 43, according to the data that the 3rd equipment received in time slot N sends, obtains channel estimating; And, according to the channel estimating got, determine the data needing to send to the 3rd equipment at time slot N+T.
Below in conjunction with hardware configuration, the process of the transfer of data that the device provided the embodiment of the present invention realizes in co-channel full duplex system is simultaneously described.
The output of each sendaisle (i.e. transtation mission circuit) of this device arranges a change over switch, and the input of each receive path (circuit) of this device arranges a change over switch, wherein, the other end of each change over switch is connected with an antenna in first group of antenna of this device and an antenna in second group of antenna of this device respectively, and this device transmits as follows by controlling each change over switch:
In time slot N, by least one second equipment sending data of the sky alignment in first group of antenna, and received the data of at least one the 3rd equipment transmission by the antenna in second group of antenna, wherein, N is integer;
In time slot N+T, received the data of this at least one second equipment transmission by the antenna in first group of antenna, and by this at least one the 3rd equipment sending data of sky alignment in second group of antenna, wherein, T is time offset and T is integer;
Wherein, all antennas of this device are divided into two groups, and first group of antenna is not identical with the antenna that second group of antenna comprises.
The device that the embodiment of the present invention provides, can realize the transmission mode of co-channel full duplex simultaneously, and, because uplink/downlink channel creates reciprocity, the reciprocity that this device can utilize uplink/downlink channel to produce, carries out channel estimating, thus saves signaling consumption.
In force, due to when the transformation period of channel is less than the coherence time of channel, the conversion of channel is negligible, and preferably, the value of time off-set T is less than the coherence time of channel.
In force, the present invention is that provided device can base station, also can be terminal, specifically comprise following three kinds of preferred implementations:
The device that mode 1, the embodiment of the present invention provide is base station, the same terminal that the second equipment and the 3rd equipment are served for this base station.
Under which, because base station and terminal can realize sending downstream signal and receiving upward signal simultaneously, thus improve spectrum efficiency at double, specifically see the description of the mode 1 in said method part, repeat no more herein.
The device that mode 2, the embodiment of the present invention provide is base station, the different terminals that the second equipment and the 3rd equipment are served for this base station.
Under which, because base station can realize sending downstream signal and receiving upward signal simultaneously, thus improve spectrum efficiency at double, specifically see the description of the mode 2 in said method part, repeat no more herein.
The device that mode 3, the embodiment of the present invention provide is terminal, and the second equipment and the 3rd equipment are the current base station be connected of this terminal.
Under which, because base station and terminal can realize sending downstream signal and receiving upward signal simultaneously, thus improve spectrum efficiency at double, specifically see the description of the mode 3 in said method part, repeat no more herein.
Be described in mode 2 below, in the present embodiment, it is that example is described that base station comprises four antennas, shown in Fig. 5 A, antenna 11 and antenna 12 belong to first group of antenna, antenna 21 and antenna 22 belong to second group of antenna, wherein, one end of change over switch 1 is connected with sendaisle 1, and the other end is connected with antenna 11 and antenna 21 respectively, one end of change over switch 2 is connected with sendaisle 2, and the other end is connected with antenna 12 and antenna 22 respectively, one end of change over switch 3 is connected with receive path 1, and the other end is connected with antenna 11 and antenna 21 respectively, one end of change over switch 4 is connected with receive path 2, and the other end is connected with antenna 12 and antenna 22 respectively.
In time slot N, as shown in Figure 5A, control change over switch 1 and be connected with antenna 11 by sendaisle 1, base station sends downstream signal by antenna 11 to terminal 1; Control change over switch 2 to be connected with antenna 12 by sendaisle 2, base station sends downstream signal by antenna 12 to terminal 2; Control change over switch 3 receive path 1 is connected with antenna 21, the upward signal that base station is sent by antenna 21 receiving terminal 3; Control change over switch 4 receive path 2 is connected with antenna 22, the upward signal that base station is sent by antenna 22 receiving terminal 4, thus in time slot N, achieve full-duplex transmission mode;
In time slot N+T, as shown in Figure 5 B, control change over switch 3 and receive path 1 is connected with antenna 11, the upward signal that base station is sent by antenna 11 receiving terminal 1; Control change over switch 4 receive path 2 is connected with antenna 12, the upward signal that base station is sent by antenna 12 receiving terminal 2; Control change over switch 1 to be connected with antenna 21 by sendaisle 1, base station sends downstream signal by antenna 21 to terminal 3; Control change over switch 2 to be connected with antenna 22 by sendaisle 2, base station sends downstream signal by antenna 22 to terminal 4, thus in time slot N+T, achieves full-duplex transmission mode.
As can be seen from Fig. 5 A and Fig. 5 B, for each first terminal that first group of antenna is corresponding, for terminal 1, terminal 1 receives the downstream signal of this base station transmission respectively by same antenna 11 and send upward signal to this base station in time slot N+T in time slot N, therefore, terminal 1 can be estimated down channel at time slot N, and for the up transmission at time slot N+T, thus achieve the reciprocity of uplink/downlink channel;
For each second terminal that second group of antenna is corresponding, for terminal 3, base station uses same antenna 21 in time slot N, receive the upward signal of this terminal 3 transmission respectively and send downstream signal to this terminal 3 in time slot N+T, therefore, base station can be estimated up channel at time slot N, and for the descending transmission at time slot N+T, achieve the reciprocity of uplink/downlink channel.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. data transmission method while in co-channel full duplex system, it is characterized in that, the method comprises:
First equipment, in time slot N, by least one second equipment sending data of the sky alignment in first group of antenna, and receives the data of at least one the 3rd equipment transmission by the antenna in second group of antenna;
Described first equipment, in time slot N+T, receives the data of at least one second equipment transmission described by the antenna in first group of antenna, and by least one the 3rd equipment sending data described in the sky alignment in second group of antenna;
Wherein, all antennas of described first equipment are divided into two groups, and the antenna that described first group of antenna comprises with described second group of antenna is not identical; N, T are integer, and T is time offset.
2. the method for claim 1, is characterized in that, the value of described T is less than the coherence time of channel.
3. the method for claim 1, is characterized in that, described first equipment is base station, the same terminal that described second equipment and described 3rd equipment are served for described base station; Or,
Described first equipment is base station, and described second equipment and described 3rd equipment are respectively the different terminals of serving described base station.
4. the method for claim 1, is characterized in that, described first equipment is terminal, and described second equipment and described 3rd equipment are the current base station be connected of described terminal.
5. the method as described in any one of Claims 1 to 4, is characterized in that, described method also comprises:
The data that described first equipment sends according to described 3rd equipment received in time slot N, obtain channel estimating; And,
Described first equipment, according to described channel estimating, determines the data needing to send to described 3rd equipment at time slot N+T.
6. data transmission device while in co-channel full duplex system, it is characterized in that, this device comprises:
First transmission control module, in time slot N, by least one second equipment sending data of the sky alignment in first group of antenna, and receives the data of at least one the 3rd equipment transmission by the antenna in second group of antenna;
Second transmission control module, in time slot N+T, receives the data of at least one second equipment transmission described by the antenna in first group of antenna, and by least one the 3rd equipment sending data described in the sky alignment in second group of antenna;
Wherein, all antennas of described device are divided into two groups, and the antenna that described first group of antenna comprises with described second group of antenna is not identical; N, T are integer, and T is time offset.
7. device as claimed in claim 6, it is characterized in that, described device is base station, the same terminal that described second equipment and described 3rd equipment are served for described base station; Or,
Described device is base station, and described second equipment and described 3rd equipment are respectively the different terminals of serving described base station; Or,
Described device is terminal, and described second equipment and described 3rd equipment are the current base station be connected of described terminal.
8. device as claimed in claims 6 or 7, it is characterized in that, described device also comprises:
Channel estimation module, for the data sent according to described 3rd equipment received in time slot N, obtains channel estimating; And, according to described channel estimating, determine the data needing to send to described 3rd equipment at time slot N+T.
9. the data transmission device simultaneously in co-channel full duplex system, it is characterized in that, the output of each sendaisle of described device arranges a change over switch, and the input of each receive path of described device arranges a change over switch, wherein, the other end of each described change over switch is connected with an antenna in second group of antenna of an antenna in first group of antenna of described device and described device respectively, and described device transmits as follows by controlling each described change over switch:
In time slot N, by least one second equipment sending data of the sky alignment in first group of antenna, and received the data of at least one the 3rd equipment transmission by the antenna in second group of antenna;
In time slot N+T, received the data of at least one second equipment transmission described by the antenna in first group of antenna, and by least one the 3rd equipment sending data described in the sky alignment in second group of antenna;
Wherein, all antennas of described first equipment are divided into two groups, and the antenna that described first group of antenna comprises with described second group of antenna is not identical; N, T are integer, and T is time offset.
10. device as claimed in claim 9, it is characterized in that, described device is base station, the same terminal that described second equipment and described 3rd equipment are served for described base station; Or,
Described device is base station, and described second equipment and described 3rd equipment are respectively the different terminals of serving described base station; Or,
Described device is terminal, and described second equipment and described 3rd equipment are the current base station be connected of described terminal.
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| CN201310741853.6A CN104753658B (en) | 2013-12-27 | 2013-12-27 | Data transmission method and device a kind of while in co-channel full duplex system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105634711A (en) * | 2016-01-25 | 2016-06-01 | 山东大学 | Channel state information obtaining method of separated massive antenna array full-duplex wireless communication system |
| CN109698735A (en) * | 2017-10-20 | 2019-04-30 | 北京字节跳动网络技术有限公司 | A kind of alien frequencies diversity data processing method and device |
| WO2022214389A3 (en) * | 2021-04-07 | 2022-11-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Flexible antenna port mapping for retaining channel reciprocity in full-duplex wireless communication systems |
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| WO2011126266A2 (en) * | 2010-04-06 | 2011-10-13 | Samsung Electronics Co., Ltd. | Apparatus and method for spatial division duplex(sdd) for millimeter wave communication system |
| CN102595627A (en) * | 2012-01-18 | 2012-07-18 | 北京大学 | Duplex communication method based on frequency domain dispatching |
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| WO2011126266A2 (en) * | 2010-04-06 | 2011-10-13 | Samsung Electronics Co., Ltd. | Apparatus and method for spatial division duplex(sdd) for millimeter wave communication system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634711A (en) * | 2016-01-25 | 2016-06-01 | 山东大学 | Channel state information obtaining method of separated massive antenna array full-duplex wireless communication system |
| CN105634711B (en) * | 2016-01-25 | 2018-11-02 | 山东大学 | A kind of channel state information acquisition method of the extensive antenna array full-duplex wireless communication systems of separate type |
| CN109698735A (en) * | 2017-10-20 | 2019-04-30 | 北京字节跳动网络技术有限公司 | A kind of alien frequencies diversity data processing method and device |
| CN109698735B (en) * | 2017-10-20 | 2020-02-18 | 北京字节跳动网络技术有限公司 | Different-frequency diversity data processing method and device |
| WO2022214389A3 (en) * | 2021-04-07 | 2022-11-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Flexible antenna port mapping for retaining channel reciprocity in full-duplex wireless communication systems |
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| CN104753658B (en) | 2018-12-11 |
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