CN109391314B - Method for feeding back and obtaining channel quality, user equipment, base station and readable medium - Google Patents
Method for feeding back and obtaining channel quality, user equipment, base station and readable medium Download PDFInfo
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- CN109391314B CN109391314B CN201710689540.9A CN201710689540A CN109391314B CN 109391314 B CN109391314 B CN 109391314B CN 201710689540 A CN201710689540 A CN 201710689540A CN 109391314 B CN109391314 B CN 109391314B
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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
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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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]
-
- 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
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
- H04B7/0478—Special codebook structures directed to feedback optimisation
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- Mobile Radio Communication Systems (AREA)
Abstract
A method for feeding back and acquiring channel quality, user equipment, a base station and a readable medium are provided. The method for feeding back the channel quality comprises the following steps: acquiring channel quality information of each layer according to a downlink channel; and sending the SRS of the plurality of ports to a network side in a time-sharing manner, wherein the sending sequence of the SRS of each port is consistent with the sequencing of the channel quality of each layer of the downlink channel, so that the network side can receive the SRS of the plurality of ports in a blind detection manner and obtain the sequencing information of the channel quality of each layer of the downlink channel. By applying the scheme, the sequencing information of the channel quality of each layer of the downlink channel at the network side can be implicitly notified under the condition of not introducing extra system overhead.
Description
Technical Field
The embodiment of the invention relates to the field of communication, in particular to a method for feeding back and acquiring channel quality, user equipment, a base station and a readable medium.
Background
In the existing product implementation, for an Advanced Codebook (Advanced Codebook) and a Type II Codebook (Type II Codebook), a User Equipment (UE) may indicate channel quality information of each layer by feeding back a Relative Power Indicator (RPI) or an Amplitude Scaling Factor (ACF) of each layer, so that a network side may obtain ordering information of channel quality of each layer. However, for other codebooks, for example, a Type I codebook (Type I codebook), the UE has no corresponding RPI or ACF feedback, and can only directly feed back the ranking information of the channel quality of each layer to the network side, but this scheme introduces additional system overhead and causes resource waste.
Disclosure of Invention
The technical problem solved by the embodiment of the invention is how to feed back the sequencing information of the channel quality without introducing extra system overhead.
In order to solve the above technical problem, an embodiment of the present invention provides a method for feeding back channel quality by a user equipment, where the method includes: a method of a user equipment feeding back channel quality, the method comprising: acquiring channel quality information of each layer according to a downlink channel; and sending the SRS of the plurality of ports to a network side in a time-sharing manner, wherein the sending sequence of the SRS of each port is consistent with the sequencing of the channel quality of each layer of the downlink channel, so that the network side can receive the SRS of the plurality of ports in a blind detection manner and obtain the sequencing information of the channel quality of each layer of the downlink channel.
Optionally, the time-sharing sending of the SRS of the multiple ports to the network side includes: and sending the SRS of a plurality of ports to a network side in a time-sharing manner according to the sequence of the channel quality of each layer of the downlink channel from high to low, wherein the identifier of the layer is consistent with the identifier of the port.
Optionally, the time-sharing sending of the SRS of the multiple ports to the network side includes: and sending the SRS of a plurality of ports to a network side in a time-sharing manner according to the sequence of the channel quality of each layer of the downlink channel from low to high, wherein the identifier of the layer is consistent with the identifier of the port.
The embodiment of the invention provides a method for acquiring channel quality at a network side, which comprises the following steps: receiving the SRS of a plurality of ports transmitted by the UE in a time-sharing manner in a blind detection manner, wherein the transmission sequence of the SRS of each port is consistent with the sequencing of the channel quality of each layer of a downlink channel; and acquiring sequencing information of the channel quality of each layer of the downlink channel based on the transmission sequence of the ports of the received SRS.
An embodiment of the present invention provides a user equipment, including: the first acquisition unit is suitable for acquiring the channel quality information of each layer according to the downlink channel; and the sending unit is suitable for sending the SRS of the plurality of ports to the network side in a time-sharing manner, wherein the sending sequence of the SRS of each port is consistent with the sequencing of the channel quality of each layer of the downlink channel, so that the network side can receive the SRS of the plurality of ports in a blind detection manner and obtain the sequencing information of the channel quality of each layer of the downlink channel.
Optionally, the sending unit includes: and the first sending subunit is suitable for sending the SRS of a plurality of ports to the network side in a time-sharing manner according to the sequence of the channel quality of each layer of the downlink channel from high to low, wherein the identifier of each layer is consistent with the identifier of each port.
Optionally, the sending unit includes: and the second sending subunit is suitable for sending the SRS of the plurality of ports to the network side in a time-sharing manner according to the sequence of the channel quality of each layer of the downlink channel from low to high, wherein the identifier of the layer is consistent with the identifier of the port.
An embodiment of the present invention provides a base station, including: the receiving unit is suitable for receiving the SRS of a plurality of ports transmitted by the UE in a time-sharing manner in a blind detection manner, wherein the transmission sequence of the SRS of each port is consistent with the sequencing of the channel quality of each layer of the downlink channel; and the second acquisition unit is suitable for acquiring the sequencing information of the channel quality of each layer of the downlink channel based on the transmission sequence of the ports of the received SRS.
The embodiment of the present invention provides a computer readable medium, on which a computer instruction is stored, and when the computer instruction runs, the computer instruction executes the steps corresponding to the method for feeding back the channel quality by the user equipment.
The embodiment of the invention provides a computer readable medium, which stores computer instructions, and when the computer instructions are executed, the computer instructions execute the steps corresponding to the method for acquiring the channel quality at the network side.
The embodiment of the invention provides user equipment, which comprises a memory and a processor, wherein a computer instruction capable of running on the processor is stored in the memory, and the processor executes the corresponding steps of the method for feeding back the channel quality by the user equipment when running the computer instruction.
The embodiment of the invention provides user equipment which comprises a memory and a processor, wherein a computer instruction capable of running on the processor is stored in the memory, and the processor executes the steps corresponding to the method for acquiring the channel quality at the network side when running the computer instruction.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the user equipment transmits the SRS of a plurality of ports in a time-sharing manner, wherein the transmitting sequence of the SRS of each port is consistent with the sequencing of the channel quality of each layer of the downlink channel, and the sequencing information of the channel quality of each layer of the downlink channel at the network side can be implicitly notified under the condition of not introducing extra system overhead, so that the network side can receive the SRS of the plurality of ports in a blind detection manner, and the sequencing information of the channel quality of each layer of the downlink channel can be acquired.
Drawings
Fig. 1 is a flowchart of a method for feeding back channel quality by a user equipment according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a user equipment transmitting SRSs of multiple ports according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for acquiring channel quality at a network side according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention.
Detailed Description
In the current product scheme, for other codebooks, for example, a Type I codebook (Type I codebook), the UE has no corresponding RPI or ACF feedback, and can only directly feed back the ranking information of the channel quality of each layer to the network side, but this scheme introduces additional system overhead and causes resource waste.
The method and the device transmit the SRS of the multiple ports in a time-sharing manner through the UE, wherein the transmission sequence of the SRS of each port is consistent with the sequencing of the channel quality of each layer of the downlink channel, and can implicitly inform the sequencing information of the channel quality of each layer of the downlink channel of the network side under the condition of not introducing extra system overhead, so that the network side can receive the SRS of the multiple ports in a blind detection manner, and the sequencing information of the channel quality of each layer of the downlink channel is obtained.
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, a method for feeding back channel quality by a user equipment according to an embodiment of the present invention may include the following steps:
and S101, acquiring channel quality information of each layer according to the downlink channel.
In a specific implementation, the user equipment may obtain channel quality information of each layer by receiving a common pilot signal or a dedicated pilot signal sent by a downlink channel, which is not limited in the embodiments of the present invention.
S102, sending the SRS of a plurality of ports to a network side in a time-sharing manner, wherein the sending sequence of the SRS of each port is consistent with the sequencing of the channel quality of each layer of the downlink channel, so that the network side can receive the SRS of the plurality of ports in a blind detection manner and obtain the sequencing information of the channel quality of each layer of the downlink channel.
In specific implementation, the ue needs to send Sounding Reference signals (Sounding Reference signals) of multiple ports to the network side, so that the network side can perform uplink channel estimation and uplink channel quality measurement based on the SRS. The SRS of different ports correspond to different orthogonal codes, and the network side distinguishes the SRS of different ports through different orthogonal codes. Therefore, the user equipment can transmit Sounding Reference signals (Sounding Reference signals) of multiple ports in a time-sharing manner through the uplink channel, wherein the transmission sequence of the SRS of each port is consistent with the sequencing of the channel quality of each layer of the downlink channel, so that the network side can receive the SRS of the multiple ports in a blind detection manner and obtain the sequencing information of the channel quality of each layer of the downlink channel.
In specific implementation, the ue may send SRS of multiple ports to the network side in a time-sharing manner according to the sequence of channel quality of each layer of the downlink channel from high to low, where the identifier of the layer is consistent with the identifier of the port; or sending the SRS of a plurality of ports to the network side in a time-sharing manner according to the sequence of the channel quality of each layer of the downlink channel from low to high, wherein the identifier of the layer is consistent with the identifier of the port. As long as the user equipment and the network side agree in advance the correspondence between the SRS transmission order of the plurality of ports and the channel quality order of each layer of the downlink channel, the network side can infer and acquire the ranking information of the channel quality of each layer of the downlink channel according to the port order of the SRS transmitted by the UE.
For example, in an embodiment of the present invention, as shown in fig. 2, in a time-frequency Resource diagram, SRS ports 1 to 4 occupy the same Resource Element (RE) in a frequency domain, and a subcarrier interval is 4. The downlink channel detected by the user equipment comprises 4 layers, wherein the sequence of the channel quality of each layer from high to low is as follows: layer 2>Layer 1>Layer 4>Layer 3. Should be takenWith the above scheme, the sending sequence of the SRS ports 1-4 on the time axis is as follows in sequence: SRS of port 2->SRS of port 1-SRS of port 4->SRS of port 3, wherein
The RE occupied for the SRS is one of the RE occupied,
are idle REs.
By applying the above scheme, the user equipment can implicitly notify the sequencing information of the channel quality of each layer of the downlink channel of the network side by sending the SRS of the multiple ports in a time-sharing manner without introducing additional system overhead, so that the network side can receive the SRS of the multiple ports in a blind detection manner, thereby acquiring the sequencing information of the channel quality of each layer of the downlink channel.
The embodiment of the present invention further provides a method for acquiring channel quality at a network side, as shown in fig. 3, the method includes the following steps:
s301, receiving the SRSs of the plurality of ports transmitted by the UE in a time-sharing manner in a blind detection manner, wherein the transmission sequence of the SRS of each port is consistent with the sequence of the channel quality of each layer of the downlink channel.
In a specific implementation, the network side may receive the SRSs of the multiple ports in a blind detection manner without knowing the transmission order of the multi-port SRS, so as to obtain the order of the ports through which the UE transmits the SRS.
S302, based on the sending sequence of the ports of the received SRS, the sequencing information of the channel quality of each layer of the downlink channel is obtained.
In a specific implementation, the network side calculates and acquires the ranking information of the channel quality of each layer of the downlink channel based on the transmission order of the ports of the received SRS and the correspondence between the transmission order of the SRS of the plurality of ports, which is pre-agreed with the UE, and the order of the channel quality of each layer of the downlink channel.
For example, in an embodiment of the present invention, the network side and the UE agree to: and the UE transmits the SRS of a plurality of ports to the network side in a time-sharing manner according to the sequence of the channel quality of each layer of the downlink channel from high to low, wherein the identifier of the layer is consistent with the identifier of the port. After the network side obtains the sending sequence of the ports of the SRS, the sequence corresponding to the port identification is the sequence of the channel quality of each layer of the downlink channel from high to low.
In order to make those skilled in the art better understand and implement the present invention, the embodiment of the present invention provides a user equipment capable of implementing the method for feeding back channel quality as described above, as shown in fig. 4.
Referring to fig. 4, the user equipment 40 includes: a first acquisition unit 41 and a transmission unit 42, wherein:
the first obtaining unit 41 is adapted to obtain channel quality information of each layer according to a downlink channel.
The transmitting unit 42 is adapted to transmit SRS of multiple ports to the network side in a time-sharing manner, where a transmission order of the SRS of each port is consistent with an order of channel quality of each layer of the downlink channel, so that the network side can receive the SRS of multiple ports in a blind detection manner and obtain order information of channel quality of each layer of the downlink channel.
In an embodiment of the present invention, the sending unit 42 may include: the first transmitting subunit 421 is adapted to transmit SRS of multiple ports to the network side in a time-sharing manner according to the order of channel quality of each layer of the downlink channel from high to low, where the identifier of the layer is consistent with the identifier of the port.
In an embodiment of the present invention, the sending unit 42 may include: the second transmitting subunit 422 is adapted to transmit SRS of multiple ports to the network side in a time-sharing manner according to a sequence from low to high of channel quality of each layer of the downlink channel, where the identifier of the layer is consistent with the identifier of the port.
The embodiment of the present invention further provides a computer readable medium, where a computer instruction is stored, and when the computer instruction runs, the corresponding step of the method for feeding back channel quality is executed, which is not described again.
The embodiment of the present invention further provides a user equipment, which includes a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the processor executes the steps corresponding to the method for feeding back channel quality when running the computer instruction, which is not described in detail again.
In order to make those skilled in the art better understand and implement the present invention, the embodiment of the present invention provides a base station capable of implementing the method for acquiring channel quality described above, as shown in fig. 4.
Referring to fig. 5, the base station 50 includes: a receiving unit 51 and a second obtaining unit 52, wherein:
the receiving unit 51 is adapted to receive SRSs of multiple ports sent by the UE in a time-sharing manner in a blind detection manner, where a sending order of the SRSs of each port is consistent with an ordering of channel qualities of each layer of the downlink channel.
The second obtaining unit 52 is adapted to obtain the ordering information of the channel quality of each layer of the downlink channel based on the transmission order of the ports of the received SRS.
The embodiment of the present invention further provides a computer readable medium, where a computer instruction is stored, and when the computer instruction runs, the step corresponding to the method for obtaining channel quality is executed, which is not described again.
The embodiment of the present invention further provides a base station, which includes a memory and a processor, where the memory stores a computer instruction capable of being executed on the processor, and the processor executes the steps corresponding to the method for obtaining channel quality when executing the computer instruction, which is not described in detail herein.
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 (10)
1. A method for a user equipment to feedback channel quality, comprising:
acquiring channel quality information of each layer according to a downlink channel;
sending the SRS of a plurality of ports to a network side in a time-sharing manner, wherein the sending sequence of the SRS of each port is consistent with the sequencing of the channel quality of each layer of a downlink channel, so that the network side can receive the SRS of the plurality of ports in a blind detection manner and obtain the sequencing information of the channel quality of each layer of the downlink channel;
and sending the SRS of the plurality of ports to a network side in a time-sharing manner according to the sequence of the channel quality of each layer of the downlink channel from high to low or the sequence of the channel quality of each layer of the downlink channel from low to high.
2. The method of claim 1, wherein the layer identifier of the channel is consistent with the port identifier.
3. A method for acquiring channel quality at a network side is characterized by comprising the following steps:
receiving the SRS of a plurality of ports transmitted by the UE in a time-sharing manner in a blind detection manner, wherein the transmission sequence of the SRS of each port is consistent with the sequencing of the channel quality of each layer of a downlink channel;
acquiring sequencing information of channel quality of each layer of a downlink channel based on the transmission sequence of the ports of the received SRS;
the SRS is received according to the sequence of the channel quality of each layer of the downlink channel from high to low or the sequence of the channel quality of each layer of the downlink channel from low to high.
4. A user device, comprising:
the first acquisition unit is suitable for acquiring the channel quality information of each layer according to the downlink channel;
the sending unit is suitable for sending the SRS of a plurality of ports to a network side in a time-sharing manner, wherein the sending sequence of the SRS of each port is consistent with the sequencing of the channel quality of each layer of the downlink channel, so that the network side can receive the SRS of the plurality of ports in a blind detection manner and obtain the sequencing information of the channel quality of each layer of the downlink channel;
and sending the SRS of the plurality of ports to a network side in a time-sharing manner according to the sequence of the channel quality of each layer of the downlink channel from high to low or the sequence of the channel quality of each layer of the downlink channel from low to high.
5. The user equipment of claim 4, wherein the identity of the layer of the channel is consistent with the identity of the port.
6. A base station, comprising:
the receiving unit is suitable for receiving the SRS of a plurality of ports transmitted by the UE in a time-sharing manner in a blind detection manner, wherein the transmission sequence of the SRS of each port is consistent with the sequencing of the channel quality of each layer of the downlink channel;
a second obtaining unit, adapted to obtain, based on a transmission order of ports of the received SRS, ranking information of channel quality of each layer of the downlink channel;
and sending the SRS of the plurality of ports to a network side in a time-sharing manner according to the sequence of the channel quality of each layer of the downlink channel from high to low or the sequence of the channel quality of each layer of the downlink channel from low to high.
7. A computer readable medium having stored thereon computer instructions, wherein said computer instructions when executed perform the steps corresponding to the method of claim 1 or 2.
8. A computer readable medium having stored thereon computer instructions, wherein said computer instructions when executed perform the steps corresponding to the method of claim 3.
9. A user device comprising a memory and a processor, the memory having stored thereon computer instructions capable of being executed by the processor, the processor when executing the computer instructions performing steps corresponding to the method of claim 1 or 2.
10. A base station comprising a memory and a processor, wherein the memory has stored thereon computer instructions capable of being executed by the processor, and wherein the processor executes the computer instructions to perform steps corresponding to the method of claim 3.
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