CN112436922B - MCS scheduling method, terminal equipment, network equipment and storage medium - Google Patents
MCS scheduling method, terminal equipment, network equipment and storage medium Download PDFInfo
- Publication number
- CN112436922B CN112436922B CN202011351959.1A CN202011351959A CN112436922B CN 112436922 B CN112436922 B CN 112436922B CN 202011351959 A CN202011351959 A CN 202011351959A CN 112436922 B CN112436922 B CN 112436922B
- Authority
- CN
- China
- Prior art keywords
- mcs
- csi
- scheduling method
- cqi
- index value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
-
- 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
- H04L1/0026—Transmission of channel quality indication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The application discloses a modulation and coding strategy MCS scheduling method, which is applied to terminal equipment and comprises the following steps: receiving an MCS index value sent by network equipment; and if the MCS index value is smaller than the MCS reference value, sending a capability change instruction to the network equipment so that the network equipment carries out MCS scheduling based on the capability change instruction, wherein the MCS reference value is determined by a Channel Quality Indicator (CQI) reported by the terminal equipment. The application also discloses a terminal device, a network device and a computer readable storage medium. The method and the device can realize reasonable scheduling of MCS and improve the data transmission rate.
Description
Technical Field
The present application relates to the field of mobile communications technologies, and in particular, to an MCS scheduling method, a terminal device, a network device, and a computer-readable storage medium.
Background
With the rapid development of technology and 5G (5th-Generation, fifth Generation mobile communication technology), users have increasingly high requirements for data transmission rate of terminal devices. Due to the application of the MIMO (multiple input multiple output) technology, the data transmission rate of the terminal device is rapidly increased. For example, 1T2R (1Transmit2Receive ) and 1T4R (1Transmit 4Receive, 1Transmit 4 Receive) which are most widely applied to mobile phone terminals, data can be transmitted in turn on 2 or 4 antennas, and thus, the data transmission rate is improved.
However, some of the vendors' network devices do not adapt to the same extent to 1T2R and 1T4R, e.g., the base station is more likely to favor resource allocation to 1T4R capable terminal devices. For example, a mobile phone with 1T2R capability has the same CQI (Channel Quality indication) reported by a mobile phone with 1T4R capability, and a base station allocates MCS (Modulation and Coding Scheme) 19 to a mobile phone with 1T2R capability and MCS25 to a mobile phone with 1T4R capability, so that the data transmission rate of the mobile phone with 1T2R capability is much lower than that of the mobile phone with 1T4R capability, which shows that the MCS allocated by the network device is unreasonable.
In summary, even if the CQI reported to the network device by the terminal devices with different MIMO capabilities is the same, the network device cannot allocate the same MCS. Therefore, how to schedule MCS reasonably is a problem that needs to be solved urgently at present.
Disclosure of Invention
The present application mainly aims to provide an MCS scheduling method, a terminal device, a network device, and a computer-readable storage medium, and aims to implement a rational MCS scheduling and improve a data transmission rate.
In order to achieve the above object, the present application provides a modulation and coding strategy MCS scheduling method, where the MCS scheduling method is applied to a terminal device, and the MCS scheduling method includes the following steps:
receiving an MCS index value sent by network equipment;
if the MCS index value is smaller than the MCS reference value, sending a capability change instruction to the network equipment so that the network equipment carries out MCS scheduling based on the capability change instruction, wherein the MCS reference value is determined by a Channel Quality Indicator (CQI) reported by the terminal equipment.
In addition, to achieve the above object, the present application further provides a modulation and coding strategy MCS scheduling method, where the MCS scheduling method is applied to a network device, and the MCS scheduling method includes the following steps:
receiving a capability change instruction sent by terminal equipment, sending a channel state information reference signal (CSI-RS) to the terminal equipment based on the capability change instruction, so that the terminal equipment measures the CSI-RS to obtain Channel State Information (CSI), and sending the CSI to the network equipment, wherein the CSI comprises a Channel Quality Indicator (CQI);
receiving the CSI sent by the terminal equipment, and determining an MCS index value based on the CSI;
and sending the MCS index value to the terminal equipment to realize the rescheduling of the MCS.
In addition, in order to achieve the above object, the present application further provides a terminal device, which is characterized in that the terminal device includes: a memory, a processor and a modulation and coding scheme, MCS, scheduler stored on the memory and operable on the processor, the MCS scheduler, when executed by the processor, implementing the steps of the first MCS scheduling method as described above.
In addition, to achieve the above object, the present application further provides a network device, which includes: a memory, a processor and a modulation and coding scheme, MCS, scheduler stored on the memory and operable on the processor, the MCS scheduler, when executed by the processor, implementing the steps of the second MCS scheduling method as described above.
In addition, to achieve the above object, the present application also provides a computer readable storage medium, which stores a modulation and coding strategy MCS scheduler, which when executed by a processor implements the steps of the first or second MCS scheduling method as described above.
The application provides a MCS scheduling method, a terminal device, a network device and a computer readable storage medium, wherein the MCS scheduling method is applied to the terminal device and used for receiving an MCS index value sent by the network device; and if the MCS index value is smaller than the MCS reference value, sending the capability change instruction to the network equipment so that the network equipment carries out MCS scheduling based on the capability change instruction, wherein the MCS reference value is determined by a Channel Quality Indicator (CQI) reported by the terminal equipment. In the application, the terminal equipment receives an MCS index value allocated by the network equipment, then determines an MCS reference value corresponding to the CQI according to the CQI reported previously, compares the MCS index value with the MCS reference value to know whether the MCS scheduling of the network equipment is reasonable, if not, the terminal equipment sends an ability change instruction to the network equipment so that the network equipment carries out MCS scheduling again until the MCS index value allocated by the network equipment is reasonable, so that the reasonable scheduling of the MCS is realized, and the transmission rate of a downlink channel is prevented from being too low, thereby improving the data transmission rate.
Drawings
Fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present application;
FIG. 2 is a flowchart illustrating a first embodiment of an MCS scheduling method applied to a terminal device according to the present application;
FIG. 3 is a reference diagram of a mapping relationship table of an embodiment of an MCS scheduling method applied to a terminal device according to the present application;
fig. 4 is a flowchart illustrating a MCS scheduling method applied to a network device according to a first embodiment of the present application.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Referring to fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present application.
The terminal in the embodiment of the present application is a Modulation and Coding Scheme (MSC) scheduling device, and the MSC scheduling device may be a mobile phone, a base station, a Personal Computer (PC), a microcomputer, a notebook computer, a server, or the like.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU (Central Processing Unit), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and an MCS scheduler.
In the terminal shown in fig. 1, if the terminal is a terminal device, the processor 1001 may be configured to call the MCS scheduler stored in the memory 1005, and perform the following operations:
when receiving an MCS index value sent by network equipment, acquiring a Channel Quality Indicator (CQI) and acquiring a mapping relation between the CQI and the MCS;
receiving an MCS index value sent by network equipment;
if the MCS index value is smaller than the MCS reference value, sending a capability change instruction to the network equipment so that the network equipment carries out MCS scheduling based on the capability change instruction, wherein the MCS reference value is determined by a Channel Quality Indicator (CQI) reported by the terminal equipment.
Further, processor 1001 may be configured to invoke the MCS scheduler stored in memory 1005 to perform the following operations:
reporting the CQI to network equipment;
and determining an MCS reference value according to the CQI.
Further, processor 1001 may be configured to invoke the MCS scheduler stored in memory 1005 to perform the following operations:
acquiring a mapping relation table, wherein the mapping relation table stores the mapping relation between CQI and MCS;
and determining an MCS reference value according to the mapping relation table and the CQI.
Further, processor 1001 may be configured to invoke the MCS scheduler stored in memory 1005 to perform the following operations:
determining a multiple-input multiple-output (MIMO) type of the terminal equipment;
and determining a mapping relation table according to the MIMO type.
Further, processor 1001 may be configured to invoke the MCS scheduler stored in memory 1005 to perform the following operations:
receiving a channel state information reference signal (CSI-RS) sent by network equipment, and measuring the CSI-RS to obtain Channel State Information (CSI), wherein the CSI comprises CQI;
and sending the CSI to the network equipment so that the network equipment determines an MCS index value based on the CSI and sends the MCS index value to the terminal equipment.
Further, processor 1001 may be configured to invoke the MCS scheduler stored in memory 1005 to perform the following operations:
and determining the MIMO type of the terminal equipment, and closing the MIMO capability corresponding to the MIMO type.
Further, processor 1001 may be configured to invoke the MCS scheduler stored in memory 1005 to perform the following operations:
if the network equipment is in a Time Division Duplex (TDD) mode, the network equipment carries out MCS scheduling according to the working mode of CSI-RS or uplink reference signal (SRS) based on the capability change indication;
and if the network equipment is in a Frequency Division Duplex (FDD) mode, the network equipment carries out MCS scheduling according to the working mode of the CSI-RS based on the capability change indication.
In the terminal shown in fig. 1, if the terminal is a network device, the processor 1001 may be configured to call the MCS scheduler stored in the memory 1005, and perform the following operations:
receiving a capability change instruction sent by terminal equipment, sending a channel state information reference signal (CSI-RS) to the terminal equipment based on the capability change instruction, so that the terminal equipment measures the CSI-RS to obtain Channel State Information (CSI), and sending the CSI to the network equipment, wherein the CSI comprises a Channel Quality Indicator (CQI);
receiving the CSI sent by the terminal equipment, and determining an MCS index value based on the CSI;
and sending the MCS index value to the terminal equipment to realize the rescheduling of the MCS.
Further, the network device is in TDD mode, and the processor 1001 may be configured to call the MCS scheduler stored in the memory 1005, and further perform the following operations:
receiving a capability change instruction sent by terminal equipment, and receiving an uplink reference signal (SRS) sent by the terminal equipment based on the capability change instruction;
measuring the SRS to obtain channel quality;
determining an MCS index value according to the channel quality;
and sending the MCS index value to the terminal equipment to realize the rescheduling of the MCS.
Based on the above hardware structure, various embodiments of the MCS scheduling method of the present application are proposed.
The application provides an MCS scheduling method.
Referring to fig. 2, fig. 2 is a flowchart illustrating a first embodiment of the MCS scheduling method applied to a terminal device according to the present application.
In this embodiment, the MCS scheduling method is applied to a terminal device, and the MCS scheduling method includes:
step S10, receiving MCS index value sent by the network equipment;
in this embodiment, when the terminal device accesses the network device, the MCS index value sent by the network device is received. The MCS (Modulation and Coding Scheme) index values are used to represent data communication rates, that is, each MCS index value corresponds to a physical transmission rate, and it can be understood that the mapping relationship between the MCS index values and the physical transmission rates is related to signal bandwidths and is divided into different mapping relationships according to different signal bandwidths. In addition, the mapping relationship between the MCS index value and the physical transmission rate is also related to the packet transmission time interval, the number of spatial streams, and the like.
The Modulation schemes corresponding to different MCS index values include BPSK (Binary Phase Shift Keying), QPSK (Quadrature Phase Shift Keying), 16-QAM (Quadrature Amplitude Modulation), 64-QAM (Quadrature Amplitude Modulation), and the like. Under the condition that the conditions such as the number of spatial streams, the packet transmission interval time and the like are the same, the physical transmission rate is related to the modulation mode, and the modulation modes corresponding to the physical transmission rate from small to large are BPSK, QPSK, 16-QAM and 64-QAM. In addition, the physical transmission rate is also related to the coding rate, and is not described in detail herein.
It is to be appreciated that in particular embodiments, the network device may be a base station or a router, etc.
Step S20, if the MCS index value is smaller than the MCS reference value, sending a capability change indication to the network device, so that the network device performs MCS scheduling based on the capability change indication, where the MCS reference value is determined by a channel quality indicator CQI reported by the terminal device.
In this embodiment, the MCS index value is compared with the MCS reference value, and if the MCS index value is smaller than the MCS reference value, the capability change instruction is sent to the network device, so that the network device performs MCS scheduling based on the capability change instruction, where the MCS reference value is determined by a channel quality indicator CQI reported by the terminal device.
It should be noted that, if the MCS index value is smaller than the MCS reference value, it indicates that the MCS index value allocated by the current network device is not reasonable, that is, the current channel condition allows a larger MCS index value. If the MCS index value is greater than or equal to the MCS reference value, the MCS index value allocated by the current network equipment is reasonable.
In an embodiment, the CQI (Channel Quality indication) is measured by the terminal device, and specifically, the terminal device measures the downlink Channel to obtain the downlink Channel Quality. Wherein, the higher the CQI, the better the downlink channel quality, that is, the better the channel condition. And, the better the channel conditions, the greater the physical transmission rate may be allowed. It can be understood that the downlink scheduling is determined by the network device, and the network device cannot know the channel condition when serving as the transmitting end, so that the terminal device is required to measure the downlink channel and feed back the measured CQI, so that the network device can know the channel quality and make MCS scheduling based on the channel quality, so as to prevent channel resource waste.
In addition, the mapping relationship between the CQI and the MCS is a correspondence relationship between the CQI and the MCS reference value. The mapping relationship is related to a MIMO (multiple input multiple output) type, that is, the mapping relationship is related to the number of spatial streams. Therefore, different MIMO types of the terminal device correspond to different mapping relationships. The mapping relationship may be stored in the terminal device in a form of a table, for example, the mapping relationship table, specifically, referring to fig. 3, fig. 3 is a reference diagram of the mapping relationship table applied to the MCS scheduling method of the terminal device in this application. Fig. 3 is for convenience of understanding, and does not limit the mapping relationship, which may be set according to actual situations. The CQI is used to characterize the channel quality, and the MCS reference value is used to characterize the minimum MCS index value under the current channel quality. Taking fig. 3 as an example, when the CQI value is 2, the corresponding MCS value is 7.
Specifically, after receiving the capability change instruction, the network device reverts to a working mode of a Channel State Information Reference Signal (CSI-RS) and a working mode of a Channel State indication (CSI-RS), or reverts to a working mode of a Sounding Reference Signal (SRS). It should be noted that the MCS scheduling operation mode includes a CSI-RS and CSI operation mode or an SRS operation mode. The MCS scheduling mode is determined by a mode of the network device, and if the network device is in an FDD (Frequency Division duplex) mode, the MCS scheduling mode is a CSI-RS and CSI mode, and may also be an SRS mode; if the network device is in a TDD (Time Division duplex) mode, the MCS scheduling mode is the SRS mode. It can be understood that, when the network device is in the TDD mode, the detection result of the SRS operating mode can be used for the uplink channel and the downlink channel at the same time due to the reciprocity of the uplink and downlink channels of the TDD. In addition, the step of the working modes of the CSI-RS and the CSI comprises the following steps: the terminal equipment receives the CSI-RS sent by the network equipment and measures the CSI-RS to obtain the CSI, wherein the CSI comprises CQI, and then the CSI is sent to the network equipment so that the network equipment determines an MCS index value based on the CSI and feeds the MCS index value back to the terminal equipment, so that the rescheduling of a downlink channel is realized, and the rate of the downlink channel is prevented from being too low; the operation mode of the SRS comprises the following steps: the terminal equipment sends the SRS to the network equipment so that the network equipment measures the SRS to obtain the channel quality, then determines the MCS index value according to the channel quality, and finally feeds the MCS index value back to the terminal equipment, thereby realizing the rescheduling of the downlink channel and avoiding the too low rate of the downlink channel.
Further, in step S20, if the MCS index value is smaller than the MCS reference value, sending a capability change instruction to the network device, and then, the method further includes:
step A, determining the MIMO type of the terminal equipment, and closing the MIMO capability corresponding to the MIMO type.
After sending the capability change instruction to the network device, determining the MIMO type of the terminal device, and closing the MIMO capability corresponding to the MIMO type. The MIMO type includes 1T2R (1Transmit2Receive ) and 1T4R (1Transmit 4Receive, 1Transmit 4 Receive).
It should be noted that turning off the capabilities of the terminal device such as 1T2R or 1T4R can prevent the network device from being affected by the MIMO capabilities of the terminal device, which may result in an unreasonable MCS scheduling. For example, the network devices of some manufacturers have different adaptation degrees to 1T2R and 1T4R, and the network devices are more prone to perform resource allocation on the terminal device with 1T4R capability, so that the data transmission rate of the mobile phone with 1T2R capability is much lower than that of the mobile phone with 1T4R capability, and it is seen that the terminal device turns on MIMO capability, which has a great influence on MCS scheduling of the network device.
It can be understood that after MCS scheduling is performed again and rational scheduling of MCS is achieved, MIMO capability possessed by the terminal device can be turned on again.
The embodiment of the application provides an MCS scheduling method, which is applied to terminal equipment and used for receiving an MCS index value sent by network equipment; and if the MCS index value is smaller than the MCS reference value, sending the capability change instruction to the network equipment so that the network equipment carries out MCS scheduling based on the capability change instruction, wherein the MCS reference value is determined by a Channel Quality Indicator (CQI) reported by the terminal equipment. In the embodiment of the application, the terminal equipment receives the MCS index value allocated by the network equipment, then determines the MCS reference value corresponding to the CQI according to the CQI reported before, compares the MCS index value with the MCS reference value to know whether the MCS scheduling of the network equipment is reasonable or not, if not, the terminal equipment sends the capability change instruction to the network equipment so that the network equipment performs the MCS scheduling again until the MCS index value allocated by the network equipment is reasonable, so that the MCS is scheduled reasonably, the transmission rate of a downlink channel is prevented from being too low, and the data transmission rate is improved.
Further, based on the first embodiment, a second embodiment of the MCS scheduling method of the present application is proposed.
In this embodiment, before the step S10, the MCS scheduling method further includes:
step B, reporting CQI to network equipment;
and step C, determining the MCS reference value according to the CQI.
Firstly, reporting CQI to network equipment so that the network equipment determines an MCS index value based on the CQI, feeding the MCS index value back to the terminal equipment, and then storing the CQI to the terminal equipment so that the MCS reference value is determined according to the CQI subsequently while reporting the CQI. It is to be understood that the determination of the MCS reference value according to the CQI may be before the step of receiving the MCS index value transmitted by the network device or after the step of receiving the MCS index value transmitted by the network device.
In an embodiment, the CQI is measured by the terminal device, and specifically, the terminal device measures the downlink channel to obtain the quality of the downlink channel. Wherein, the higher the CQI, the better the downlink channel quality, that is, the better the channel condition. And, the better the channel conditions, the greater the physical transmission rate may be allowed. It can be understood that the downlink scheduling is determined by the network device, and the network device cannot know the channel condition when serving as the transmitting end, so that the terminal device is required to measure the downlink channel and feed back the measured CQI, so that the network device can know the channel quality and make MCS scheduling based on the channel quality, so as to prevent channel resource waste.
Specifically, the step C includes:
step C1, obtaining a mapping relation table, wherein the mapping relation table stores the mapping relation between CQI and MCS;
and step C2, determining MCS reference value according to the mapping relation table and the CQI.
Firstly, a mapping relation table of CQI and MCS is obtained, and then, according to the CQI reported by the terminal equipment before, a corresponding MCS reference value is obtained in the mapping relation table. The mapping relation between the CQI and the MCS is the corresponding relation between the CQI and the MCS reference value. The mapping relationship may be stored in the terminal device in the form of a table, for example, a mapping relationship table, specifically, refer to fig. 3. Fig. 3 is for convenience of understanding, and does not limit the mapping relationship, which may be set according to actual situations. The CQI is used to characterize the channel quality, and the MCS reference value is used to characterize the minimum MCS index value under the current channel quality. Taking fig. 3 as an example, when the CQI value is 2, the corresponding MCS value is 7.
In one embodiment, the step C2 includes:
step C21, determining the MIMO type of the terminal device;
and step C22, determining a mapping relation table according to the MIMO type.
In this embodiment, since the mapping relationship is related to MIMO (multiple input multiple output) type, that is, the mapping relationship is related to the number of spatial streams. Therefore, the MIMO type of the terminal equipment is determined, so as to determine the mapping relation table of CQI and MCS according to the MIMO type. It can be understood that the corresponding mapping relationship can be accurately obtained according to the MIMO type of the terminal device. The mapping relation is stored in the terminal equipment in a form of a table and is maintained by the terminal equipment.
It can be understood that the MIMO capability of the terminal device is determined according to the MIMO type of the terminal device, so that the terminal device can accurately obtain the corresponding mapping relationship, and the called mapping relationship error is prevented, thereby improving the accuracy of MCS scheduling.
In this embodiment, the MCS reference value is determined according to the CQI reported by the terminal device, and the current allowable MCS of the terminal device can be known, so as to ensure that the subsequent MCS performs rational scheduling based on this.
Further, based on the second embodiment, a third embodiment of the MCS scheduling method of the present application is proposed.
In this embodiment, the step B includes:
step B1, receiving a channel state information reference signal (CSI-RS) sent by network equipment, and measuring the CSI-RS to obtain Channel State Information (CSI), wherein the CSI comprises CQI;
and step B2, sending the CSI to the network equipment, so that the network equipment determines an MCS index value based on the CSI and sends the MCS index value to the terminal equipment.
In this embodiment, when receiving a CSI-RS (Channel State Information Reference Signal) sent by a network device, the CSI-RS is measured to obtain a CSI (Channel State indication), where the CSI includes a CQI, and then the CSI is sent to the network device, so that the network device determines an MCS index value based on the CSI and sends the MCS index value to a terminal device.
It should be noted that the network device sends a pilot signal (CSI-RS) to the terminal device, so that the terminal device measures the pilot signal to obtain channel quality and then sends the channel quality back to the network device, so that the network device can determine how to send data according to the channel quality, that is, determine how to schedule the MCS.
In addition, it should be noted that the CSI-RS is used for the terminal device to obtain the signal to interference plus noise ratio of the downlink channel through downlink measurement, then the network device determines the spectrum efficiency of the terminal device in the downlink channel through the signal to interference plus noise ratio reported by the terminal device, the spectrum efficiency may be obtained through shannon's theorem, and finally, the code rate of the downlink channel is obtained through the spectrum efficiency, and the MCS is determined according to the code rate. In addition, the CSI-RS is also used for beam management, time-frequency tracking, mobility management, rate matching and the like.
Where CSI is a channel property of a communication channel that describes the fading factor of a signal on each transmission channel, i.e., the value of each element in a channel gain matrix H (also referred to as a channel matrix, channel fading matrix). The CSI may indicate the current channel conditions, improving reliability and transmission rate in a multi-antenna system. The CSI comprises PMI, RI and CQI, and the terminal equipment indicates the best precoding matrix currently transmitted by the network equipment through the PMI. RI is the meaning of a rank indication, indicating the best number of layers currently transmitted by the network device. The CQI is a channel quality indicator, which indicates that after the proposed RI and PMI are adopted, in order to ensure that the received bit error rate of the downlink channel does not exceed 10%, the highest available modulation and coding scheme, that is, the value of the CQI will affect the value of the downlink MCS.
It can be understood that the CQI reported by the terminal device needs to be stored in the terminal device, so that the subsequent terminal device can obtain the CQI.
In this embodiment, the CQI reported by the terminal device may be obtained through a working mode of the CSI-RS, so as to determine an MCS reference value corresponding to the CQI based on a mapping relationship in the following. Meanwhile, the MCS index value is obtained through the working mode of the CSI-RS, so that the MCS index value can be obtained by subsequent terminal equipment.
Further, based on the first embodiment, a fourth embodiment of the MCS scheduling method of the present application is proposed.
In this embodiment, in step S20, the network device performs MCS scheduling based on the capability change instruction, including:
a21, if the network device is in TDD mode, the network device performs MCS scheduling according to the working mode of CSI-RS or SRS based on the capability change indication;
step a22, if the network device is in frequency division duplex FDD mode, the network device performs MCS scheduling according to the working mode of CSI-RS based on the capability change indication.
In this embodiment, if the network device is in a TDD (Time Division duplex) mode, the network device performs MCS scheduling according to a working manner of a CSI-RS (channel state reference signal) or an SRS (sounding reference signal) based on the capability change instruction; and if the network equipment is in an FDD (frequency Division duplex) mode, the network equipment carries out MCS scheduling according to the working mode of the CSI-RS based on the capability change instruction.
It should be noted that, when the network device is in the TDD mode, due to reciprocity of uplink and downlink channels of TDD, a detection result of the SRS operating mode may be used for detecting the uplink channel and the downlink channel at the same time, and therefore, when the network device is in the TDD mode, the MCS scheduling may be performed by using the SRS operating mode.
In addition, it should be noted that the step of the CSI-RS operation mode includes: the terminal equipment receives the CSI-RS sent by the network equipment and measures the CSI-RS to obtain Channel State Information (CSI), wherein the CSI comprises CQI, and then the CSI is sent to the network equipment so that the network equipment can determine an MCS index value based on the CSI and feed the MCS index value back to the terminal equipment, and therefore rescheduling of a downlink channel is achieved, and the situation that the rate of the downlink channel is too low is avoided. The operation mode of the SRS comprises the following steps: the terminal equipment sends the SRS to the network equipment so that the network equipment measures the SRS to obtain the channel quality, then determines the MCS index value according to the channel quality, and finally feeds the MCS index value back to the terminal equipment, thereby realizing the rescheduling of the downlink channel and avoiding the too low rate of the downlink channel.
In this embodiment, corresponding operating modes are set for network devices in different modes, so as to improve the applicability of the MCS scheduling method in this embodiment.
The application also provides an MCS scheduling method.
Referring to fig. 4, fig. 4 is a flowchart illustrating a MCS scheduling method applied to a network device according to a first embodiment of the present application.
In this embodiment, the MCS scheduling method is applied to a network device, and the MCS scheduling method includes:
step S100, receiving a capability change instruction sent by a terminal device, sending a channel state information reference signal (CSI-RS) to the terminal device based on the capability change instruction, so that the terminal device measures the CSI-RS to obtain Channel State Information (CSI), and sending the CSI to the network device, wherein the CSI comprises a Channel Quality Indicator (CQI);
step S200, receiving the CSI sent by the terminal equipment, and determining an MCS index value based on the CSI;
step S300, the MCS index value is sent to the terminal equipment, so as to implement rescheduling of MCS.
In this embodiment, when receiving a capability change instruction sent by a terminal device, sending a CSI-RS (Channel State Information Reference Signal) to the terminal device based on the capability change instruction, so that the terminal device measures the CSI-RS to obtain a Channel State Indication (CSI), and sends the CSI to a network device, where the CSI includes a CQI (Channel Quality indication), then receiving the CSI sent by the terminal device, determining an index value of a Modulation and Coding Scheme (MCS) based on the CSI, and finally sending the MCS index value to the terminal device to implement rescheduling of the MCS.
Specifically, after receiving the capability change instruction, the network device reverts to a CSI-RS and CSI working mode or reverts to an SRS (sounding reference signal) working mode.
It should be noted that the terminal device receives a CSI-RS sent by the network device, and measures the CSI-RS to obtain a CSI, where the CSI includes a CQI (Channel Quality indication) index value, and then sends the CSI to the network device, so that the network device determines an MCS index value based on the CSI and feeds the MCS index value back to the terminal device, thereby implementing rescheduling of a downlink Channel and avoiding an excessively low rate of the downlink Channel.
Where CSI is a channel property of a communication channel that describes the fading factor of a signal on each transmission channel, i.e., the value of each element in a channel gain matrix H (also referred to as a channel matrix, channel fading matrix). The CSI may indicate the current channel conditions, improving reliability and transmission rate in a multi-antenna system. The CSI comprises PMI, RI and CQI, and the terminal equipment indicates the best precoding matrix currently transmitted by the network equipment through the PMI. RI is the meaning of a rank indication, indicating the best number of layers currently transmitted by the network device. The CQI is a channel quality indicator, which indicates that after the proposed RI and PMI are adopted, in order to ensure that the received bit error rate of the downlink channel does not exceed 10%, the highest available modulation and coding scheme, that is, the value of the CQI will affect the value of the downlink MCS.
The embodiment of the application provides an MCS scheduling method, which is applied to network equipment, receives a capability change instruction sent by terminal equipment, and sends a channel state information reference signal (CSI-RS) to the terminal equipment based on the capability change instruction, so that the terminal equipment measures the CSI-RS to obtain Channel State Information (CSI), and sends the CSI to the network equipment, wherein the CSI comprises a Channel Quality Indicator (CQI); receiving CSI sent by terminal equipment, and determining an MCS index value based on the CSI; and sending the MCS index value to the terminal equipment to realize the rescheduling of the MCS. In the embodiment of the application, the network equipment receives the capability change indication sent by the terminal equipment, and then determines the corresponding MCS index value according to the capability change indication, so that the network equipment performs MCS scheduling again until the MCS index value allocated by the network equipment is reasonable, reasonable scheduling of the MCS is realized, and the transmission rate of a downlink channel is prevented from being too low, thereby improving the data transmission rate.
Further, based on the first embodiment, a second embodiment of the MCS scheduling method applied to the network device is proposed.
In this embodiment, the MCS scheduling method further includes:
step D, receiving a capability change instruction sent by terminal equipment, and receiving an uplink reference signal (SRS) sent by the terminal equipment based on the capability change instruction;
step E, measuring the SRS to obtain the channel quality;
step F, determining an MCS index value according to the channel quality;
and G, sending the MCS index value to the terminal equipment to realize the rescheduling of the MCS.
In this embodiment, when a capability change instruction sent by a terminal device is received, an SRS sent by the terminal device is received based on the capability change instruction, then the SRS is measured to obtain channel quality, and finally, an MCS index value is determined according to the channel quality and sent to the terminal device, so as to implement rescheduling of the MCS.
It should be noted that, if the mode of the network device is a TDD (Time Division duplex) mode, due to reciprocity of uplink and downlink channels of TDD, a detection result of the SRS operating mode may be used for detecting the uplink channel and the downlink channel at the same Time, so that the SRS operating mode may be used for MCS scheduling.
In this embodiment, MCS scheduling is performed in an SRS operating mode, and only the terminal device needs to send an SRS, and compared with an SRS operating mode of a CSI-RS and a CSI operating mode, this embodiment does not need to perform back-and-forth data transmission, and can improve real-time performance. Therefore, the present embodiment can improve the accuracy of MCS scheduling.
The present application further provides a terminal device, including: a memory, a processor and a MCS scheduler stored on the memory and operable on the processor, the MCS scheduler when executed by the processor implementing the steps of the MCS scheduling method as described above for any one of the embodiments of a terminal device.
The specific embodiment of the terminal device of the present application is substantially the same as the embodiments of the MCS scheduling method applied to the terminal device, and is not described herein again.
The present application also provides a network device, including: a memory, a processor, and an MCS scheduler stored on the memory and operable on the processor, the MCS scheduler when executed by the processor implementing the steps of the MCS scheduling method as described above as applied to any one of the embodiments of a network device.
The specific embodiment of the terminal device in the present application is substantially the same as the embodiments of the MCS scheduling method applied to the network device, and is not described herein again.
The present application also provides a computer readable storage medium having stored thereon an MCS scheduler, which when executed by a processor implements the steps of the MCS scheduling method as described above as applied to any one of the embodiments of a terminal device.
The specific embodiment of the computer-readable storage medium of the present application is substantially the same as the embodiments of the MCS scheduling method applied to the terminal device, and is not described herein again.
The present application also provides a computer readable storage medium having stored thereon an MCS scheduler that, when executed by a processor, implements the steps of the MCS scheduling method as described above as applied to any one of the embodiments of a network device.
The specific embodiment of the computer-readable storage medium of the present application is substantially the same as the embodiments of the MCS scheduling method applied to the network device, and is not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present application may be substantially or partially embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present application.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (12)
1. A Modulation and Coding Strategy (MCS) scheduling method is applied to terminal equipment, and is characterized in that the MCS scheduling method comprises the following steps:
receiving an MCS index value sent by network equipment;
if the MCS index value is smaller than the MCS reference value, sending a capability change instruction to the network equipment so that the network equipment carries out MCS scheduling based on the capability change instruction, wherein the MCS reference value is determined by a Channel Quality Indicator (CQI) reported by the terminal equipment.
2. The MCS scheduling method of claim 1, wherein the step of receiving the MCS index value transmitted by the network device is preceded by further comprising:
reporting the CQI to network equipment;
and determining an MCS reference value according to the CQI.
3. The MCS scheduling method of claim 2, wherein the step of determining an MCS reference value according to the CQI includes:
acquiring a mapping relation table, wherein the mapping relation table stores the mapping relation between CQI and MCS;
and determining an MCS reference value according to the mapping relation table and the CQI.
4. The MCS scheduling method according to claim 3, wherein the step of obtaining the mapping relation table includes:
determining the MIMO type of the terminal equipment;
and determining a mapping relation table according to the MIMO type.
5. The MCS scheduling method of claim 2, wherein the step of reporting the CQI to a network device comprises:
receiving a channel state information reference signal (CSI-RS) sent by network equipment, and measuring the CSI-RS to obtain Channel State Information (CSI), wherein the CSI comprises CQI;
and sending the CSI to the network equipment so that the network equipment determines an MCS index value based on the CSI and sends the MCS index value to the terminal equipment.
6. The MCS scheduling method of claim 1, wherein after the step of sending a capability change indication to the network device if the MCS index value is less than the MCS reference value, further comprising:
and determining the MIMO type of the terminal equipment, and closing the MIMO capability corresponding to the MIMO type.
7. The MCS scheduling method according to any of claims 1 to 6, wherein the step of the network device performing MCS scheduling based on the capability change indication comprises:
if the network equipment is in a Time Division Duplex (TDD) mode, the network equipment carries out MCS scheduling according to the working mode of CSI-RS or uplink reference signal (SRS) based on the capability change indication;
and if the network equipment is in a Frequency Division Duplex (FDD) mode, the network equipment carries out MCS scheduling according to the working mode of the CSI-RS based on the capability change indication.
8. A Modulation and Coding Strategy (MCS) scheduling method is applied to network equipment, and is characterized in that the MCS scheduling method comprises the following steps:
receiving a capability change instruction sent by terminal equipment, sending a channel state information reference signal (CSI-RS) to the terminal equipment based on the capability change instruction, so that the terminal equipment measures the CSI-RS to obtain Channel State Information (CSI), and sending the CSI to the network equipment, wherein the CSI comprises a Channel Quality Indicator (CQI);
receiving the CSI sent by the terminal equipment, and determining an MCS index value based on the CSI;
and sending the MCS index value to the terminal equipment to realize the rescheduling of the MCS.
9. The MCS scheduling method of claim 8, wherein the network device is in a time division duplex, TDD, mode, the MCS scheduling method further comprising:
receiving a capability change instruction sent by terminal equipment, and receiving an uplink reference signal (SRS) sent by the terminal equipment based on the capability change instruction;
measuring the SRS to obtain channel quality;
determining an MCS index value according to the channel quality;
and sending the MCS index value to the terminal equipment to realize the rescheduling of the MCS.
10. A terminal device, characterized in that the terminal device comprises: memory, a processor and a modulation and coding scheme, MCS, scheduler stored on the memory and operable on the processor, the MCS scheduler when executed by the processor implementing the steps of the MCS scheduling method of any one of claims 1 to 7.
11. A network device, characterized in that the network device comprises: memory, a processor and a modulation and coding scheme, MCS, scheduler stored on the memory and operable on the processor, the MCS scheduler when executed by the processor implementing the steps of the MCS scheduling method of any one of claims 8 to 9.
12. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a modulation and coding strategy, MCS, scheduler, which when executed by a processor implements the MCS scheduling method of any one of claims 1 to 7 or the steps of the MCS scheduling method of any one of claims 8 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011351959.1A CN112436922B (en) | 2020-11-25 | 2020-11-25 | MCS scheduling method, terminal equipment, network equipment and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011351959.1A CN112436922B (en) | 2020-11-25 | 2020-11-25 | MCS scheduling method, terminal equipment, network equipment and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112436922A CN112436922A (en) | 2021-03-02 |
| CN112436922B true CN112436922B (en) | 2022-05-20 |
Family
ID=74698504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011351959.1A Active CN112436922B (en) | 2020-11-25 | 2020-11-25 | MCS scheduling method, terminal equipment, network equipment and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112436922B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105517171A (en) * | 2014-10-15 | 2016-04-20 | 中国移动通信集团公司 | Method and base station for scheduling LTE terminal in LTE-A network |
| CN105873101A (en) * | 2016-03-31 | 2016-08-17 | 武汉邮电科学研究院 | Self-adaption mode switching method and system based on MCS and bler |
| CN106685587A (en) * | 2015-11-06 | 2017-05-17 | 株式会社Kt | Method of determining modulation order and transport block size in downlink data channel, and apparatus thereof |
| CN107689841A (en) * | 2016-08-03 | 2018-02-13 | 中兴通讯股份有限公司 | Data transmission method and device |
| CN108155973A (en) * | 2018-01-03 | 2018-06-12 | 北京北方烽火科技有限公司 | A kind of modulating-coding strategy determines method and device |
| KR20180072467A (en) * | 2016-12-21 | 2018-06-29 | 주식회사 케이티 | Method and femto base station for down link adaptation |
| CN108631972A (en) * | 2017-03-22 | 2018-10-09 | 华为技术有限公司 | The method and its device of transmission data and the method and its device for receiving data |
| CN109802755A (en) * | 2017-11-17 | 2019-05-24 | 华为技术有限公司 | Downlink Control Information determines method and communication device |
| CN111010254A (en) * | 2018-01-19 | 2020-04-14 | 华为技术有限公司 | Communication, MCS receiving and notifying method and equipment |
| EP3644537A1 (en) * | 2018-01-18 | 2020-04-29 | Huawei Technologies Co. Ltd. | Method for sending or receiving data, and communication device |
| CN111385040A (en) * | 2018-12-27 | 2020-07-07 | 大唐移动通信设备有限公司 | Method and device for determining MCS value |
| CN111491355A (en) * | 2019-01-29 | 2020-08-04 | 大唐移动通信设备有限公司 | Downlink power configuration method and device |
| CN111835456A (en) * | 2019-04-22 | 2020-10-27 | 上海华为技术有限公司 | Data processing method, network equipment and terminal equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8098601B2 (en) * | 2007-03-23 | 2012-01-17 | Research In Motion Limited | Slow adaptation of modulation and coding for packet transmission |
| US9300431B2 (en) * | 2012-06-04 | 2016-03-29 | Alcatel Lucent | Apparatus, method and computer readable medium for payload segmentation of wireless packet data transmissions |
-
2020
- 2020-11-25 CN CN202011351959.1A patent/CN112436922B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105517171A (en) * | 2014-10-15 | 2016-04-20 | 中国移动通信集团公司 | Method and base station for scheduling LTE terminal in LTE-A network |
| CN106685587A (en) * | 2015-11-06 | 2017-05-17 | 株式会社Kt | Method of determining modulation order and transport block size in downlink data channel, and apparatus thereof |
| CN105873101A (en) * | 2016-03-31 | 2016-08-17 | 武汉邮电科学研究院 | Self-adaption mode switching method and system based on MCS and bler |
| CN107689841A (en) * | 2016-08-03 | 2018-02-13 | 中兴通讯股份有限公司 | Data transmission method and device |
| KR20180072467A (en) * | 2016-12-21 | 2018-06-29 | 주식회사 케이티 | Method and femto base station for down link adaptation |
| CN108631972A (en) * | 2017-03-22 | 2018-10-09 | 华为技术有限公司 | The method and its device of transmission data and the method and its device for receiving data |
| CN109802755A (en) * | 2017-11-17 | 2019-05-24 | 华为技术有限公司 | Downlink Control Information determines method and communication device |
| CN108155973A (en) * | 2018-01-03 | 2018-06-12 | 北京北方烽火科技有限公司 | A kind of modulating-coding strategy determines method and device |
| EP3644537A1 (en) * | 2018-01-18 | 2020-04-29 | Huawei Technologies Co. Ltd. | Method for sending or receiving data, and communication device |
| CN111010254A (en) * | 2018-01-19 | 2020-04-14 | 华为技术有限公司 | Communication, MCS receiving and notifying method and equipment |
| CN111385040A (en) * | 2018-12-27 | 2020-07-07 | 大唐移动通信设备有限公司 | Method and device for determining MCS value |
| CN111491355A (en) * | 2019-01-29 | 2020-08-04 | 大唐移动通信设备有限公司 | Downlink power configuration method and device |
| CN111835456A (en) * | 2019-04-22 | 2020-10-27 | 上海华为技术有限公司 | Data processing method, network equipment and terminal equipment |
Non-Patent Citations (2)
| Title |
|---|
| "R1-1803919 CQI and MCS Tables for URLLC".《3GPP tsg_ran\WG1_RL1》.2018, * |
| 长期演进系统中一种改进的信通质量指示修正算法的设计;袁浔等;《科学技术与工程》;20131218(第35期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112436922A (en) | 2021-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109560840B (en) | Wireless communication device for adaptive beamforming and method of operating the same | |
| JP7450554B2 (en) | Upstream power control method, terminal and network equipment | |
| US8750143B2 (en) | Extended uplink control information (UCI) reporting via the physical uplink control channel (PUCCH) | |
| US9980260B2 (en) | Data transmission method and apparatus, and user equipment | |
| US20230015115A1 (en) | Method, device, and storage medium for configuring starting symbol position of uplink data channel | |
| US10218476B2 (en) | Transmission of reference signals | |
| CN111769857B (en) | Method and communication device for reporting terminal equipment capability | |
| WO2021031949A1 (en) | Uplink transmission method, terminal, and network-side device | |
| EP2141853A2 (en) | CQI signalling and resource, moduation and coding allocation | |
| CN113517967B (en) | Method for determining Channel State Information (CSI) report and communication equipment | |
| CN101986588B (en) | Channel state information feedback method and terminal | |
| EP4195538A1 (en) | Channel state information feedback method and apparatus, device, and storage medium | |
| US20150305013A1 (en) | Adaptive Generation of Channel State Feedback (CSF) Based on Base Station CSF Scheduling | |
| CN114844596B (en) | Method and communication device for transmitting side-link channel state information | |
| CN109995493B (en) | Method, communication equipment and device for determining transmission resources of channel state information | |
| US20190349948A1 (en) | A Wireless Device, a Serving Network Node and Respective Method Performed Thereby for Communicating with Each Other | |
| CN111435864B (en) | Method and device for transmitting channel state information | |
| CN112436922B (en) | MCS scheduling method, terminal equipment, network equipment and storage medium | |
| CN106559113B (en) | Subset selection method of channel information measurement pilot frequency resource, terminal and base station | |
| CN110958040B (en) | Receiving method and feedback method of channel state information, network side equipment and terminal | |
| CN115276908B (en) | Wireless communication method, device and storage medium | |
| CN111970036A (en) | Communication method and communication device | |
| CN109392166A (en) | The adaptive and active feedback that power and performance are optimized | |
| CN102111198B (en) | Downlink channel information feedback method and system in multipoint collaborative transmission | |
| US20220131638A1 (en) | Enhancements For CQI Reporting In Mobile Communications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |