CN109412665B - Channel state indicating and acquiring method, transmitting device, receiving device and medium - Google Patents
Channel state indicating and acquiring method, transmitting device, receiving device and medium Download PDFInfo
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- CN109412665B CN109412665B CN201810748018.8A CN201810748018A CN109412665B CN 109412665 B CN109412665 B CN 109412665B CN 201810748018 A CN201810748018 A CN 201810748018A CN 109412665 B CN109412665 B CN 109412665B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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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
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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Abstract
A method for indicating and acquiring a channel state, a sending device, a receiving device and a medium are provided, wherein the method for indicating the channel state comprises the following steps: determining data to be transmitted and a transmitting antenna used by the data to be transmitted; and sending the data to be sent and the identifier of the determined transmitting antenna to an opposite terminal by using the determined transmitting antenna, so that the opposite terminal calculates and acquires channel state information based on the received data to be sent and the identifier of the transmitting antenna. By applying the scheme, the opposite end can acquire the channel state information with lower system overhead.
Description
Technical Field
The embodiment of the invention relates to the field of communication, in particular to a channel state indicating and acquiring method, sending equipment, receiving equipment and a medium.
Background
In a Wireless Local Area Network (WLAN) system, a Wireless Station device (STA) communicates with other devices through an Access Point device (AP). In order to improve the efficiency of WLAN channels, WLAN systems support Beamforming (Beamforming) techniques. The principle of the beam forming technology is as follows: a transmitting end (beamform) first acquires Channel State Information (Channel State Information), and then transmits data to a receiving end (beamform) by using a beam forming technique according to the Channel State Information.
In the existing implementation, the beacon may obtain the channel state information in two ways: 1. in the explicit acquisition method, the Beamform calculates and acquires channel state information through algorithms such as channel estimation, and then feeds back the channel state information to the Beamformer; 2. in the implicit obtaining method, a beacon calculates and obtains channel state information based on a reference (Sounding) data packet sent by the beacon.
In the existing implementation scheme, for the explicit acquisition method, a receiving end needs to feed back channel state information, so that WLAN channel resources are occupied, and the system overhead is high; for the implicit acquisition method, the receiving end needs to feed back the Sounding data packet, and also needs to occupy WLAN channel resources, which results in high system overhead.
Disclosure of Invention
The technical problem solved by the embodiment of the invention is how to obtain the channel state information by the Beamformer with lower system overhead.
To solve the foregoing technical problem, an embodiment of the present invention provides a method for indicating a channel state, including: determining data to be transmitted and a transmitting antenna used by the data to be transmitted; and sending the data to be sent and the identifier of the determined transmitting antenna to an opposite terminal by using the determined transmitting antenna, so that the opposite terminal calculates and acquires channel state information based on the received data and the identifier of the transmitting antenna.
Optionally, the number of the transmitting antennas is one or more.
Optionally, the identification of the transmitting antenna comprises: an invalid identifier; the invalid identifier is used for indicating that the channel state information acquired by the opposite end based on the received data is invalid information.
Optionally, the determined identity of the transmitting antenna is sent to the opposite terminal through at least one of the following data packets: a signaling domain of a physical layer data packet, a service domain of the physical layer data packet, a control domain of a MAC layer content data packet, and a packet header of the MAC layer data packet.
Optionally, the method for indicating a channel state further includes: receiving indication information sent by an opposite terminal; and determining a transmitting antenna used for transmitting the data to be transmitted based on the indication information.
Optionally, the data to be sent includes Sounding data, so that the opposite end calculates and acquires channel state information based on the Sounding data.
The embodiment of the invention provides a method for acquiring a channel state, which comprises the following steps: receiving data sent by an opposite terminal and an identification of a transmitting antenna used by the opposite terminal; and calculating and acquiring channel state information based on the received data and the identification of the transmitting antenna used by the data.
Optionally, the number of the transmitting antennas is one or more.
Optionally, the identifier of the transmitting antenna used for receiving the data sent by the opposite end includes: obtaining the identification of the transmitting antenna through at least one of the following data packets: a signaling domain of a physical layer data packet, a service domain of the physical layer data packet, a control domain of an MAC layer content data packet, and packet header information of the MAC layer data packet.
Optionally, the method for acquiring a channel state further includes: determining indication information, wherein the indication information is transmitting antenna information used by an opposite terminal for transmitting data; and sending the indication information to the opposite terminal, so that the opposite terminal determines a transmitting antenna used for sending data based on the indication information.
Optionally, the data sent by the peer includes Sounding data.
An embodiment of the present invention provides a transmission device, including: a first determining unit, adapted to determine data to be transmitted and a transmitting antenna used by the data; and the first sending unit is suitable for sending the data to be sent and the identifier of the determined transmitting antenna to an opposite terminal by using the determined transmitting antenna, so that the opposite terminal calculates and acquires channel state information based on the received data to be sent and the identifier of the transmitting antenna.
Optionally, the number of the transmitting antennas is one or more.
Optionally, the identification of the transmitting antenna comprises: an invalid identifier; the invalid identifier is used for indicating that the channel state information acquired by the opposite end based on the received data is invalid information.
Optionally, the first sending unit is adapted to send the determined identity of the transmitting antenna to the opposite end through at least one of the following data packets: a signaling domain of a physical layer data packet, a service domain of the physical layer data packet, a control domain of a MAC layer content data packet, and a packet header of the MAC layer data packet.
Optionally, the sending device further includes: the first receiving unit is suitable for receiving the indication information sent by the opposite terminal; and the second determining unit is suitable for determining a transmitting antenna used for transmitting the data to be transmitted based on the indication information.
Optionally, the data to be sent includes Sounding data, so that the opposite end calculates and acquires channel state information based on the Sounding data.
An embodiment of the present invention provides a receiving device, including: the second receiving unit is suitable for receiving the data sent by the opposite terminal and the identification of the transmitting antenna used by the opposite terminal; and the acquisition unit is suitable for calculating and acquiring the channel state information based on the received data and the identification of the transmitting antenna used by the data.
Optionally, the number of the transmitting antennas is one or more.
Optionally, the second receiving unit is adapted to obtain the identifier of the transmitting antenna through at least one of the following data packets: a signaling domain of a physical layer data packet, a service domain of the physical layer data packet, a control domain of an MAC layer content data packet, and packet header information of the MAC layer data packet.
Optionally, the receiving device further includes: a third determining unit, adapted to determine indication information, where the indication information is information of a transmitting antenna used by an opposite terminal to send data; and the second sending unit is suitable for sending the indication information to the opposite terminal, so that the opposite terminal determines a transmitting antenna used for sending data based on the indication information.
Optionally, the data sent by the peer includes Sounding data.
The embodiment of the present invention provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and has stored thereon a computer instruction, where the computer instruction executes, when running, any one of the above-mentioned channel state indicating methods or channel state obtaining methods.
The embodiment of the invention provides a sending device, which comprises a memory and a processor, wherein the memory is stored with computer instructions capable of running on the processor, and the processor executes the steps of any one of the channel state indicating methods when running the computer instructions.
The embodiment of the invention provides a receiving device, which comprises a memory and a processor, wherein the memory is stored with computer instructions capable of running on the processor, and the processor executes the steps of any channel state acquisition method when running the computer instructions.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
according to the embodiment of the invention, the data to be sent and the transmitting antenna used by the data to be sent are determined, and then the data to be sent and the identifier of the determined transmitting antenna are sent to the opposite terminal, so that the opposite terminal (i.e. the beacon) can calculate and acquire the channel state information based on the received data and the identifier of the transmitting antenna, and the technical problem of high system overhead caused by directly sending feedback channel state information or sending Sounding data packets is avoided. Therefore, by applying the scheme, the opposite end can acquire the channel state information with lower system overhead.
Further, by receiving data sent by the opposite end and the identifier of the transmitting antenna used by the opposite end, and then calculating and acquiring the channel state information based on the received data and the identifier of the transmitting antenna used by the opposite end, the technical problem of high system overhead caused by directly sending feedback channel state information or sending Sounding data packets by the opposite end (i.e. beacon) can be avoided.
Drawings
Fig. 1 is a flowchart of a method for indicating a channel status according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for acquiring a channel state according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a Beamforming channel according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another Beamforming channel according to an embodiment of the present invention;
fig. 5 is a schematic diagram of another Beamforming channel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a sending device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a receiving device according to an embodiment of the present invention;
fig. 8 is a schematic diagram of another Beamforming channel according to an embodiment of the present invention.
Detailed Description
In the existing implementation scheme, for the explicit acquisition method, a receiving end needs to feed back channel state information, so that WLAN channel resources are occupied, and the system overhead is high; for the implicit acquisition method, the receiving end needs to feed back the Sounding data packet, and also needs to occupy WLAN channel resources, which results in high system overhead.
According to the embodiment of the invention, the data to be sent and the transmitting antenna used by the data to be sent are determined, and then the data to be sent and the identifier of the determined transmitting antenna are sent to the opposite terminal, so that the opposite terminal (i.e. the beacon) can calculate and acquire the channel state information based on the received data and the identifier of the transmitting antenna, and the technical problem of high system overhead caused by directly sending feedback channel state information or sending Sounding data packets is avoided. Therefore, by applying the scheme, the opposite end can acquire the channel state information with lower system overhead.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1, an embodiment of the present invention provides a method for indicating a channel state, which may include the following steps:
step S101, determining data to be transmitted and a transmitting antenna used by the data.
In the embodiment of the present invention, when the same antenna is shared for transmission/reception, the transmission channel and the reception channel are the same, and when the beacon transmits data, the identifier of the transmission antenna used by the beacon is transmitted to the beacon, so that the beacon can calculate and acquire channel state information based on the received data and the transmission antenna used by the beacon. Therefore, for beamform, it is first necessary to determine the data to be transmitted and the transmitting antenna used by the data.
In a specific implementation, the beamform may determine, based on its own algorithm, a transmitting antenna used by data to be transmitted, that is, the beamform may select a reasonable transmitting antenna based on a certain algorithm, so that the beamform can obtain better complete channel state information; or determining a transmitting antenna used for transmitting the data to be transmitted based on indication information transmitted by an opposite end (i.e., beacon).
For example, in the beacon, at a first time, the beacon selects to use a first transmit antenna to transmit data, so that the beacon obtains channel state information corresponding to the first transmit antenna; and the beacon selects to use the second transmitting antenna to transmit data at the second time, so that the beacon obtains the channel state information corresponding to the second transmitting antenna. The beacon can obtain complete channel state information corresponding to the first transmitting antenna and the second transmitting antenna by selecting different transmitting antennas to transmit data at the first time and the second time.
In an embodiment of the present invention, the method for indicating a channel state further includes: receiving indication information sent by an opposite terminal; and determining a transmitting antenna used for transmitting the data to be transmitted based on the indication information.
In a specific implementation, the number of the transmitting antennas may be one or multiple. When the number of the transmitting antennas is multiple, one of the transmitting antennas may be used to transmit data, or multiple transmitting antennas may be used to transmit data.
Step S102, the determined transmitting antenna is utilized to send the data to be sent and the determined identification of the transmitting antenna to an opposite terminal, so that the opposite terminal calculates and acquires channel state information based on the received data and the identification of the transmitting antenna.
In a specific implementation, the opposite end is an end that receives data to be transmitted and the determined identifier of the transmitting antenna, and is a beacon.
In a specific implementation, the peer may be an STA or an AP. And when the opposite end is the STA, the AP is Beamform, and the indication method of the channel state is executed.
In a specific implementation, the identifier of the transmitting antenna may be an index identifier of the transmitting antenna used, or may also be an invalid identifier, where the invalid identifier is used to indicate that channel state information acquired by the opposite end based on the received data is invalid information.
For example, the beamform transmits data at antenna 1 and antenna 1 simultaneously based on Cyclic Shift Delay (CSD), and at this time, the beamform calculates the acquired channel state as an invalid channel based on the received data and the identifier of the transmitting antenna.
In a specific implementation, the invalid flag may be represented by any value different from the index value of the transmitting antenna, and the embodiment of the present invention is not limited.
In a specific implementation, the determined identifier of the transmitting antenna may be sent to the opposite end through related information of a Media Access Control (MAC) Layer, or may be sent to the opposite end through related information of a Physical Layer (Physical Layer).
In an embodiment of the present invention, the determined identifier of the transmitting antenna is sent to the opposite end through one or more of a signaling Field (SIG Field) of the physical layer packet, a Service Field (Service Field) of the physical layer packet, a Control Field (Control Field) of the MAC layer Content packet (MAC Content), and a Header (Header) of the MAC layer packet.
In specific implementation, the determined identifier of the transmitting antenna may also be sent to the opposite end through other signaling, which all belong to the protection scope of the embodiment of the present invention.
For example, when the number of the transmitting antennas is 4, the determined identifiers of the transmitting antennas may be sent to the opposite end by using 4 bits in the at least one data packet, where the correspondence between the identifiers of the 4 bits and the transmitting antennas is shown in table 1.
TABLE 1
In table 1, bit 0 corresponds to antenna 0, bit 1 corresponds to antenna 1, bit 2 corresponds to antenna 2, and bit 3 corresponds to antenna 3, and when the corresponding bit is set to 1, it indicates that the corresponding antenna is used. For example, tag #1 corresponds to 1000, bit 0 is set to 1, indicating that antenna 0 is used; the identifier #6 corresponds to 0101, and bit 1 and bit 3 are set to 1, indicating that antenna 1 and antenna 3 are used; the identifier # 13 corresponds to 1011, and bits 0, 2, and 3 all have a 1, indicating that antenna 0, antenna 2, and antenna 3 are used; flag #15 corresponds to 1111, and bit 0, bit 1, bit 2, and bit 3 all set to 1, indicating that antenna 0, antenna 1, antenna 2, and antenna 3 are used, and flag #0 is an invalid flag indicating that there is no available channel state information.
In specific implementation, the method for indicating the channel state may be used with an existing display scheme, an existing implicit scheme, or only with an existing implicit scheme, so that the opposite end obtains accurate channel state information, and the Beamforming performance is improved.
In a specific implementation, when the above method for indicating a channel state is used together with an existing implicit scheme, the data to be sent may include: sounding data packet. Namely, the data to be transmitted includes: normally sent packets (Packet) and Sounding packets.
In a specific implementation, the data to be sent may include part of the Sounding data packets, or may include all the Sounding data packets, so that the opposite end calculates and acquires all or part of the channel state information based on all or part of the Sounding data.
It is understood that the above-mentioned indication method of the channel status also belongs to an implicit scheme.
By applying the scheme, the data to be sent and the transmitting antenna used by the data to be sent are determined, and then the data to be sent and the identifier of the determined transmitting antenna are sent to the opposite terminal, so that the opposite terminal can calculate and acquire the channel state information based on the received data and the identifier of the transmitting antenna, and the technical problem of high system overhead caused by directly sending feedback channel state information or sending a Sounding data packet is avoided. Therefore, by applying the scheme, the opposite end can acquire the channel state information with lower system overhead. And at the same time, the channel state information can be updated more quickly.
In order to make those skilled in the art better understand and implement the present invention, the embodiment of the present invention further provides a method for acquiring a channel state, as shown in fig. 2.
Referring to fig. 2, the method for acquiring a channel state may include the following steps:
step S201, receiving data sent by an opposite terminal and an identifier of a transmitting antenna used by the opposite terminal.
In a specific implementation, the opposite end is an end that sends data and an identifier of a transmitting antenna used by the data, and is beamform, which may be either an STA or an AP.
In specific implementation, in order to avoid the technical problem of high system overhead caused by directly sending feedback channel state information or sending Sounding data packets, when the same antenna is shared for transmission/reception, the beamform may send the data to be sent and the determined identifier of the transmitting antenna to the beamform, so for the beamform, it is first necessary to receive the data sent by the opposite end and the identifier of the transmitting antenna used by the opposite end.
In a specific implementation, the number of the transmitting antennas may be one or multiple.
In a specific implementation, the identifier of the transmitting antenna may be an index identifier of the transmitting antenna used, or may be an invalid identifier, where the invalid identifier is used to indicate that channel state information acquired based on the received data is invalid information.
In a specific implementation, the identifier of the transmitting antenna may be obtained through one or more of a signaling Field (SIG Field) of the physical layer packet, a Service Field (Service Field) of the physical layer packet, a Control Field (Control Field) of the MAC layer Content packet (MAC Content), and a Header (Header) of the MAC layer packet.
In specific implementation, the identifier of the transmitting antenna may also be obtained through other signaling, which all belong to the protection scope of the embodiment of the present invention.
Step S202, based on the received data and the identification of the transmitting antenna used by the data, calculating and acquiring channel state information.
In a specific implementation, the opposite end may determine a transmitting antenna used for transmitting data based on its own algorithm, and may also send indication information to the opposite end, so that the opposite end determines the transmitting antenna used for transmitting data based on the indication information.
In an embodiment of the present invention, the method for acquiring a channel state further includes: determining indication information, wherein the indication information is transmitting antenna information used by an opposite terminal for transmitting data; and sending the indication information to the opposite terminal, so that the opposite terminal determines a transmitting antenna used for sending data based on the indication information.
In specific implementation, the method for acquiring a channel state may be used with an existing display scheme and an existing implicit scheme, or may be used with an existing implicit scheme only, so as to acquire accurate channel state information and improve Beamforming performance.
In a specific implementation, when the above method for acquiring a channel state is used together with an existing implicit scheme, the data sent by the peer end may include: sounding data packet. Namely, the data sent by the opposite end is a normally sent data Packet (Packet) and a Sounding data Packet.
In a specific implementation, the data sent by the peer end may include a part of the Sounding packet, or may include all the Sounding packets.
It can be understood that, for step S201, when the opposite end has only one transmitting antenna, the identifier of the transmitting antenna may not be sent, that is, only the data sent by the opposite end may be received without receiving the identifier of the transmitting antenna, and then the channel state information is calculated and obtained directly based on the received data, which also belongs to the protection scope of the embodiment of the present invention.
For example, for a peer device with 1 transmission and 1 reception (Tx1Rx1), since there is only one receiving/transmitting antenna corresponding to only one receiving/transmitting channel, the peer device can directly transmit data without transmitting the identity of the transmitting antenna.
By applying the scheme, the technical problem of high system overhead caused by directly sending feedback channel state information or sending Sounding data packets by the opposite terminal (i.e. Beamform) can be avoided by receiving the data sent by the opposite terminal and the identification of the transmitting antenna used by the opposite terminal and then calculating and acquiring the channel state information based on the received data and the identification of the transmitting antenna used by the opposite terminal. And at the same time, the channel state information can be updated more quickly.
In order to make those skilled in the art better understand and implement the present invention, the embodiment of the present invention further provides a schematic diagram of a Beamforming channel, as shown in fig. 3.
Referring to fig. 3, the antennas are the same for transmission and reception, the beamform corresponds to 4-transmission and 4-reception (4Tx4Rx), and the beamform corresponds to 2-transmission and 2-reception (2Tx2Rx), and the beamform only uses Tx1 to transmit data to the beamform.
By applying the above channel state indication method, the beacon sends data, and at the same time, sends the Tx1 id to the beacon.
By applying the method for acquiring the channel state, the beacon calculates and acquires the channel H ═ H { H } based on the data sent by the beacon and the identifier of the Tx111，h12，h13，h14Status information for Beamforming. Since the transmit and receive share the same antenna, the meaning of channel H is as follows:
wherein h is11The channel is from Tx1 of Beamformer to Rx1 of Beamformer, and from Tx1 of Beamformer to Rx1 of Beamformer.
h12The channel is from Tx2 of Beamformer to Rx1 of Beamformer, and from Tx1 of Beamformer to Rx2 of Beamformer.
h13The channel is from Tx3 of Beamformer to Rx1 of Beamformer, and from Tx1 of Beamformer to Rx3 of Beamformer.
h14The channel is from Tx4 of Beamformer to Rx1 of Beamformer, and from Tx1 of Beamformer to Rx4 of Beamformer.
In order to make those skilled in the art better understand and implement the present invention, the embodiment of the present invention further provides another schematic diagram of Beamforming channel, as shown in fig. 4.
Referring to fig. 4, the antennas are the same for transmission and reception, the beamform corresponds to 4-transmission and 4-reception (4Tx4Rx), and the beamform corresponds to 2-transmission and 2-reception (2Tx2Rx), and the beamform only uses Tx2 to transmit data to the beamform.
By applying the above channel state indication method, the beacon sends data, and at the same time, sends the Tx2 id to the beacon.
By applying the method for acquiring the channel state, the beacon calculates and acquires the channel H ═ H { H } based on the data sent by the beacon and the identifier of the Tx221，h22，h23，h24Status information for Beamforming. Since the transmit and receive share the same antenna, the meaning of channel H is as follows:
wherein h is21The channel is from Tx1 of Beamformer to Rx2 of Beamformer, and from Tx2 of Beamformer to Rx1 of Beamformer.
h22The channel is from Tx2 of Beamformer to Rx2 of Beamformer, and from Tx2 of Beamformer to Rx2 of Beamformer.
h23The channel is from Tx3 of Beamformer to Rx2 of Beamformer, and from Tx2 of Beamformer to Rx3 of Beamformer.
h24The channel is from Tx4 of Beamformer to Rx2 of Beamformer, and from Tx2 of Beamformer to Rx4 of Beamformer.
In order to make those skilled in the art better understand and implement the present invention, the embodiment of the present invention further provides a schematic diagram of another Beamforming channel, as shown in fig. 5.
Referring to fig. 5, the same antennas are used for transmission and reception, the beacon corresponds to 4-transmission and 4-reception (4Tx4Rx), and the beacon corresponds to 2-transmission and 2-reception (2Tx2Rx), and the beacon is based on Multiple Input Multiple Output (MIMO) technology, and transmits data to the beacon simultaneously by Tx1 and Tx 2.
By applying the method for indicating the channel state, the beacon transmits data, and simultaneously transmits the Tx1 and Tx2 identifiers to the beacon.
By applying the method for acquiring the channel state, the beacon calculates and acquires the channel H ═ H { H } based on the data sent by the beacon and the identifier of the Tx211，h12，h13，h14，h21，h22，h23，h24Shape of }State information for Beamforming. Since the transmit and receive share the same antenna, the meaning of channel H is as follows:
wherein h is11The channel is from Tx1 of Beamformer to Rx1 of Beamformer, and from Tx1 of Beamformer to Rx1 of Beamformer.
h12The channel is from Tx2 of Beamformer to Rx1 of Beamformer, and from Tx1 of Beamformer to Rx2 of Beamformer.
h13The channel is from Tx3 of Beamformer to Rx1 of Beamformer, and from Tx1 of Beamformer to Rx3 of Beamformer.
h14The channel is from Tx4 of Beamformer to Rx1 of Beamformer, and from Tx1 of Beamformer to Rx4 of Beamformer.
Wherein h is21The channel is from Tx1 of Beamformer to Rx2 of Beamformer, and from Tx2 of Beamformer to Rx1 of Beamformer.
h22The channel is from Tx2 of Beamformer to Rx2 of Beamformer, and from Tx2 of Beamformer to Rx2 of Beamformer.
h23The channel is from Tx3 of Beamformer to Rx2 of Beamformer, and from Tx2 of Beamformer to Rx3 of Beamformer.
h24The channel is from Tx4 of Beamformer to Rx2 of Beamformer, and from Tx2 of Beamformer to Rx4 of Beamformer.
In order to make those skilled in the art better understand and implement the present invention, the embodiment of the present invention further provides a schematic diagram of another Beamforming channel, as shown in fig. 8.
Referring to fig. 8, the same antennas are used for transmission and reception, beamform corresponds to 4-transmission and 4-reception (4Tx4Rx), beamform corresponds to 2-transmission and 2-reception (2Tx2Rx), and beamform transmits data simultaneously at Tx1 and Tx2 based on CSD.
By applying the method for indicating the channel state, the identifier of the transmitting antenna is an invalid identifier, and the channel state information acquired by the beacon based on the received data is indicated as invalid information.
In order to make those skilled in the art better understand and implement the present invention, the embodiment of the present invention further provides a transmitting device capable of implementing the above-mentioned indication method of channel status, as shown in fig. 6.
Referring to fig. 6, the transmitting apparatus 60 includes: a first determining unit 61 and a first transmitting unit 62, wherein:
the first determining unit 61 is adapted to determine data to be transmitted and a transmitting antenna used by the data.
The first sending unit 62 is adapted to send the data to be sent and the identifier of the determined transmitting antenna to an opposite end by using the determined transmitting antenna, so that the opposite end calculates and obtains channel state information based on the received data and the identifier of the transmitting antenna.
In a specific implementation, the number of the transmitting antennas is one or more.
In an embodiment of the present invention, the identification of the transmitting antenna includes: an invalid identifier; the invalid identifier is used for indicating that the channel state information acquired by the opposite end based on the received data is invalid information.
In an embodiment of the present invention, the first sending unit 62 is adapted to send the determined identity of the transmitting antenna to the opposite end through at least one of the following data packets: a signaling domain of a physical layer data packet, a service domain of the physical layer data packet, a control domain of a MAC layer content data packet, and a packet header of the MAC layer data packet.
In a specific implementation, the sending device 60 may further include: a first receiving unit (not shown) and a second determining unit (not shown), wherein:
the first receiving unit is suitable for receiving the indication information sent by the opposite terminal.
The second determining unit is adapted to determine, based on the indication information, a transmitting antenna used for transmitting the data to be transmitted.
In an embodiment of the present invention, the data to be sent includes Sounding data, so that the opposite end calculates and acquires channel state information based on the Sounding data.
In a specific implementation, the working procedure and principle of the sending device 60 may refer to the description in the indication method of the channel state provided in the foregoing embodiment, and are not described herein again.
In order to make those skilled in the art better understand and implement the present invention, the embodiment of the present invention further provides a receiving device capable of implementing the above channel state acquisition method, as shown in fig. 7.
Referring to fig. 7, the receiving apparatus 70 may include: a second receiving unit 71 and an obtaining unit 72, wherein:
the second receiving unit 71 is adapted to receive data sent by an opposite terminal and an identifier of a transmitting antenna used by the opposite terminal.
The obtaining unit 72 is adapted to calculate and obtain channel state information based on the received data and the identification of the transmitting antenna used by the data.
In a specific implementation, the number of the transmitting antennas is one or more.
In an embodiment of the present invention, the second receiving unit 71 is adapted to obtain the identification of the transmitting antenna through at least one of the following data packets: a signaling domain of a physical layer data packet, a service domain of the physical layer data packet, a control domain of an MAC layer content data packet, and packet header information of the MAC layer data packet.
In a specific implementation, the receiving device 70 may further include: a third determining unit (not shown) and a second transmitting unit (not shown), wherein:
the third determining unit is adapted to determine indication information, where the indication information is transmitting antenna information used by an opposite terminal to send data.
The second sending unit is adapted to send the indication information to the opposite end, so that the opposite end determines a transmitting antenna used for sending data based on the indication information.
In an embodiment of the present invention, the data sent by the peer includes Sounding data.
In a specific implementation, the working procedure and principle of the receiving device 70 may refer to the description in the method for acquiring a channel state provided in the foregoing embodiment, and are not described herein again.
An embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium is a non-volatile storage medium or a non-transitory storage medium, and a computer instruction is stored on the computer-readable storage medium, and when the computer instruction runs, the step corresponding to any one of the above-mentioned channel state indication method or channel state acquisition method is performed, which is not described herein again.
An embodiment of the present invention provides a sending device, including a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the processor executes, when running the computer instruction, a step corresponding to any one of the above-mentioned channel state indication methods, which is not described herein again.
An embodiment of the present invention provides a receiving device, including a memory and a processor, where the memory stores a computer instruction capable of being executed on the processor, and when the processor executes the computer instruction, the processor executes a step corresponding to any one of the above-mentioned channel state obtaining methods, which is not described herein again.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (25)
1. A method for indicating a channel status, comprising:
determining data to be transmitted and a transmitting antenna used by the data to be transmitted;
sending the data to be sent and the identifier of the determined transmitting antenna to an opposite terminal by using the determined transmitting antenna, so that the opposite terminal calculates and acquires channel state information of all sending channels of the opposite terminal based on the received data and the identifier of the transmitting antenna; wherein, the sending channel and the receiving channel of the opposite terminal are the same.
2. The method of claim 1, wherein the number of the transmitting antennas is one or more.
3. The method of claim 2, wherein the identification of the transmitting antenna comprises: an invalid identifier; the invalid identifier is used for indicating that the channel state information acquired by the opposite end based on the received data is invalid information.
4. The method of claim 1, wherein the determined identities of the transmitting antennas are sent to the peer end via at least one of the following packets:
a signaling domain of a physical layer data packet, a service domain of the physical layer data packet, a control domain of a MAC layer content data packet, and a packet header of the MAC layer data packet.
5. The method for indicating channel status according to claim 1, further comprising: receiving indication information sent by an opposite terminal;
and determining a transmitting antenna used for transmitting the data to be transmitted based on the indication information.
6. The method according to claim 1, wherein the data to be sent includes Sounding data, so that the opposite end calculates and acquires the channel state information based on the Sounding data.
7. A method for acquiring a channel state, comprising:
receiving data sent by an opposite terminal and an identification of a transmitting antenna used by the opposite terminal;
calculating and acquiring channel state information of all transmission channels based on the received data and the identifiers of the transmitting antennas used by the data; wherein the transmission channel is the same as the reception channel.
8. The method of claim 7, wherein the number of the transmitting antennas is one or more.
9. The method of claim 7, wherein the identification of the transmitting antenna used for receiving the data sent by the opposite end comprises: obtaining the identification of the transmitting antenna through at least one of the following data packets:
a signaling domain of a physical layer data packet, a service domain of the physical layer data packet, a control domain of an MAC layer content data packet, and packet header information of the MAC layer data packet.
10. The method for acquiring channel state according to claim 7, further comprising:
determining indication information, wherein the indication information is transmitting antenna information used by an opposite terminal for transmitting data;
and sending the indication information to the opposite terminal, so that the opposite terminal determines a transmitting antenna used for sending data based on the indication information.
11. The method according to claim 7, wherein the data sent by the peer end includes Sounding data.
12. A transmitting device, comprising:
a first determining unit, adapted to determine data to be transmitted and a transmitting antenna used by the data;
a first sending unit, adapted to send the data to be sent and the identifier of the determined transmitting antenna to an opposite end by using the determined transmitting antenna, so that the opposite end calculates and obtains channel state information of all sending channels of the opposite end based on the received data to be sent and the identifier of the transmitting antenna; wherein, the sending channel and the receiving channel of the opposite terminal are the same.
13. The transmitting device of claim 12, wherein the number of the transmitting antennas is one or more.
14. The transmitting device of claim 13, wherein the identification of the transmit antenna comprises: an invalid identifier; the invalid identifier is used for indicating that the channel state information acquired by the opposite end based on the received data is invalid information.
15. The sending apparatus according to claim 12, wherein the first sending unit is adapted to send the determined identity of the transmitting antenna to the opposite end through at least one of the following data packets:
a signaling domain of a physical layer data packet, a service domain of the physical layer data packet, a control domain of a MAC layer content data packet, and a packet header of the MAC layer data packet.
16. The transmitting device of claim 12, further comprising:
the first receiving unit is suitable for receiving the indication information sent by the opposite terminal;
and the second determining unit is suitable for determining a transmitting antenna used for transmitting the data to be transmitted based on the indication information.
17. The transmission apparatus according to claim 12, wherein the data to be transmitted includes Sounding data, so that the opposite end calculates and acquires the channel state information based on the Sounding data.
18. A receiving device, comprising:
the second receiving unit is suitable for receiving the data sent by the opposite terminal and the identification of the transmitting antenna used by the opposite terminal;
the acquisition unit is suitable for calculating and acquiring the channel state information of all the sending channels based on the received data and the identifiers of the transmitting antennas used by the data; wherein, the sending channel and the receiving channel of the opposite terminal are the same.
19. The receiving device of claim 18, wherein the number of the transmitting antennas is one or more.
20. The receiving device according to claim 18, wherein the second receiving unit is adapted to obtain the identification of the transmitting antenna through at least one of the following data packets:
a signaling domain of a physical layer data packet, a service domain of the physical layer data packet, a control domain of an MAC layer content data packet, and packet header information of the MAC layer data packet.
21. The receiving device of claim 18, further comprising:
a third determining unit, adapted to determine indication information, where the indication information is information of a transmitting antenna used by an opposite terminal to send data;
and the second sending unit is suitable for sending the indication information to the opposite terminal, so that the opposite terminal determines a transmitting antenna used for sending data based on the indication information.
22. The receiving device according to claim 18, wherein the data sent by the peer end includes Sounding data.
23. A computer-readable storage medium, being a non-volatile storage medium or a non-transitory storage medium, having computer instructions stored thereon, wherein the computer instructions, when executed, perform the steps of the method of any one of claims 1 to 6 or 7 to 11.
24. A transmitting device comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of any of claims 1 to 6.
25. A receiving device comprising a memory and a processor, the memory having stored thereon computer instructions executable on the processor, wherein the processor, when executing the computer instructions, performs the steps of the method of any of claims 7 to 11.
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| US8432885B2 (en) * | 2008-04-14 | 2013-04-30 | Futurewei Technologies, Inc. | System and method for channel status information feedback in a wireless communications system |
| CN101651639A (en) * | 2008-08-12 | 2010-02-17 | 中兴通讯股份有限公司 | Method for measuring uplink channel of dual-antenna terminal |
| CN101588223B (en) * | 2009-06-22 | 2012-08-08 | 华为技术有限公司 | Method, device and system for acquiring multiple-input multiple-output channel information |
| WO2012051058A1 (en) * | 2010-10-11 | 2012-04-19 | Media Tek Singapore Pte. Ltd. | Mimo channel matrix feedback in ofdm systems |
| CN102355293B (en) * | 2011-08-15 | 2017-02-08 | 中兴通讯股份有限公司 | Method and device for sending measurement reference signal |
| CN103001744B (en) * | 2011-09-14 | 2017-06-27 | 中兴通讯股份有限公司 | A kind of channel measurement information feedback method and STA |
| US20140294108A1 (en) * | 2011-09-23 | 2014-10-02 | Raul Hernan Etkin | Extrapolating Channel State Information ("CSI") Estimates From Multiple Packets Sent Over Different Antennas to Generate a Combined CSI Estimate for a MIMO-OFDM System |
| CN104333407B (en) * | 2013-07-22 | 2019-02-01 | 中兴通讯股份有限公司 | A kind of acquisition methods and device of channel information |
| CN107408969B (en) * | 2015-03-12 | 2021-05-07 | 华为技术有限公司 | Antenna mode selection method, device and system |
| WO2018053359A1 (en) * | 2016-09-15 | 2018-03-22 | Intel IP Corporation | Sounding reference signal generation in millimeter wave system |
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