CN109275150B

CN109275150B - Channel transmission parameter determination method and equipment

Info

Publication number: CN109275150B
Application number: CN201710581166.0A
Authority: CN
Inventors: 杨茜; 姜春霞
Original assignee: Potevio Information Technology Co Ltd
Current assignee: Potevio Information Technology Co Ltd
Priority date: 2017-07-17
Filing date: 2017-07-17
Publication date: 2022-02-18
Anticipated expiration: 2037-07-17
Also published as: CN109275150A

Abstract

The embodiment of the invention provides a method and equipment for determining channel transmission parameters. The method comprises the following steps: acquiring the maximum repetition times of a PDCCH (physical Downlink control channel), a PDSCH (physical Downlink shared channel) and a PUSCH (physical uplink shared channel) according to the coverage grade and a first preset table; calculating to obtain a PDCCH channel period according to the PDCCH channel maximum repetition number, the PDSCH channel maximum repetition number, the PUSCH channel maximum repetition number and the service factor; acquiring the actual repetition times of the PDCCH, the PDSCH and the PUSCH by using a second preset table according to the coverage grade and the measurement parameter; and determining the number of wireless frames required by a transmission block on a PDSCH channel and a PUSCH channel according to a buffer status report and a modulation coding mode reported by a terminal or according to the downlink buffer size and the modulation coding mode. The apparatus is for performing the method. The embodiment of the invention reasonably determines the transmission parameters of each channel and improves the utilization rate of channel resources.

Description

Channel transmission parameter determination method and equipment

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a method and equipment for determining channel transmission parameters.

Background

In a broadband access system based on the TD-LTE technology, a system available bandwidth is divided into a plurality of continuous or discontinuous sub-bands, and each sub-band is transmitted by using an Orthogonal Frequency Division Multiplexing (OFDM) technology. The sub-band is divided into a synchronous sub-band, a broadcast sub-band and a service sub-band according to functions. The synchronous sub-band is used for sending downlink synchronous signals, the broadcast sub-band is used for downlink broadcast and uplink random access, and the service sub-band is used for transmitting services. In order to reduce the cost of the terminal, the system supports a single subband operation mode, and each physical channel must be independently transmitted on each subband. The terminal works on all or part of sub-bands according to different selections of hardware capabilities, and the terminal with the weakest capability only works on a single sub-band.

Fig. 1 is a schematic diagram of frequency resource distribution provided in the prior art, and as shown in fig. 1, a typical application scenario is a wireless broadband access network of a power system, which is TD-LTE230 network for short, a frequency spectrum of the wireless broadband access network is discretely distributed in a 230M frequency band, a bandwidth of the wireless broadband access network is 8.15MHz, 40 25kHz subbands are used in total, a subband at a lowest frequency point is 223.525MHz, and a subband at a highest frequency point is 231.65 MHz.

The TD-LTE230 network requires to support deep coverage, and in order to improve the transmission performance of each physical channel working in a single sub-band, a repeated transmission mode is adopted in a time domain, and periodic transmission is adopted to obtain time diversity gain. Therefore, based on the single subband working requirement and different coverage level requirements, a data transmission mechanism is designed: the PDCCH is sent periodically, in a PDCCH period, the PDCCH sends uplink authorization information to schedule PUSCH channel transmission, or downlink authorization information to schedule PDSCH channel transmission, or the uplink authorization information and the downlink authorization information to schedule PDSCH channel and PUSCH channel transmission at the same time. The PDCCH, the PDSCH and the PUSCH all support repeated transmission, the PDSCH channel is sent after the last repeated transmission of the PDCCH is finished, or the PUSCH channel is sent after the last repeated transmission of the PDCCH is finished and fixed processing time delay (taking a wireless frame as a unit) is added. The maximum transmission time of the PDCCH is the maximum repetition times of the PDCCH configured by the RRC message, and the actual transmission time is related to the repetition times of the DCI in the DCI configuration; the longest transmission time of the PDSCH lasts until the end of the current PDCCH period, and the actual transmission time depends on DCI configuration; the longest transmission time of the PUSCH lasts until the PDCCH transmission time of the next PDCCH period plus a fixed processing delay, and the actual transmission time depends on the DCI configuration. However, currently, there is no method for determining transmission parameters in a PDCCH channel, a PUSCH channel, and a PDSCH channel, which may result in that channel resources are not reasonably utilized when signaling is transmitted in the above channels.

Therefore, how to reasonably determine channel transmission parameters and improve the utilization rate of channel resources when data transmission is performed through a periodic channel transmission mechanism is an urgent issue to be solved at present.

Disclosure of Invention

To solve the problems in the prior art, embodiments of the present invention provide a method and an apparatus for determining channel transmission parameters.

In a first aspect, an embodiment of the present invention provides a method for determining channel transmission parameters, including:

acquiring a coverage grade corresponding to a terminal, and acquiring the maximum repetition times of a PDCCH (physical Downlink control channel), the maximum repetition times of a PDSCH (physical Downlink shared channel) and the maximum repetition times of a PUSCH (physical uplink shared channel) according to the coverage grade and a first preset table;

calculating to obtain a PDCCH channel period according to the PDCCH channel maximum repetition number, the PDSCH channel maximum repetition number, the PUSCH channel maximum repetition number and a preset service factor;

acquiring the actual repetition times of a PDCCH (physical downlink control channel) and the actual repetition times of a PDSCH (physical downlink shared channel) and/or the actual repetition times of a PUSCH (physical uplink shared channel) by using a second preset table according to the coverage grade and the measurement parameters reported by the terminal;

and determining the number of wireless frames required by a transmission block on a PDSCH channel and the number of wireless frames required by a transmission block on a PUSCH channel according to the buffer status report and the modulation coding mode reported by the terminal or according to the downlink buffer size and the modulation coding mode.

In a second aspect, an embodiment of the present invention provides a channel transmission parameter determining apparatus, including:

the maximum repetition number determining module is used for acquiring a coverage grade corresponding to the terminal and acquiring the maximum repetition number of a PDCCH (physical Downlink control channel), the maximum repetition number of a PDSCH (physical Downlink shared channel) and the maximum repetition number of a PUSCH (physical uplink shared channel) according to the coverage grade and a first preset table;

a cycle determining module, configured to calculate a PDCCH channel cycle according to the PDCCH channel maximum repetition number, the PDSCH channel maximum repetition number, the PUSCH channel maximum repetition number, and a preset service factor;

the actual repetition number determining module is used for obtaining the actual repetition number of the PDCCH channel, the actual repetition number of the PDSCH channel and/or the actual repetition number of the PUSCH channel by using a second preset table according to the coverage grade and the measurement parameters reported by the terminal;

and the wireless frame number determining module is used for determining the wireless frame number required by one transmission block on the PDSCH channel and the wireless frame number required by one transmission block on the PUSCH channel according to the buffer status report and the modulation coding mode reported by the terminal or according to the downlink buffer size and the modulation coding mode.

In a third aspect, an embodiment of the present invention provides an electronic device, including: a processor, a memory, and a bus, wherein,

the processor and the memory are communicated with each other through the bus;

the memory stores program instructions executable by the processor, the processor being capable of performing the method steps of the first aspect when invoked by the program instructions.

In a fourth aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium, including:

the non-transitory computer readable storage medium stores computer instructions that cause the computer to perform the method steps of the first aspect.

According to the method and the device for determining the channel transmission parameters, provided by the embodiment of the invention, the maximum repetition times of a PDCCH (physical Downlink control channel), the maximum repetition times of a PDSCH (physical Downlink shared channel) and the maximum repetition times of a PUSCH (physical uplink shared channel) are obtained according to the coverage level and a first preset table, and then the PDCCH period is obtained according to a service factor; and acquiring the actual repetition times of the PDCCH, the PDSCH and the PUSCH according to the coverage grade, the measurement parameters and the second preset table, and determining the number of wireless frames required by one transmission block on the PDSCH and the PUSCH, so that the corresponding parameters are transmitted more reasonably through RRC signaling and DCI signaling, and the utilization rate of channel resources is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a schematic flow chart of a method for determining channel transmission parameters according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating a method for determining channel transmission parameters according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of a channel transmission parameter determining device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic flow chart of a method for determining channel transmission parameters according to an embodiment of the present invention, as shown in fig. 1, the method includes:

step 101: acquiring a coverage grade corresponding to a terminal, and acquiring the maximum repetition times of a PDCCH (physical Downlink control channel), the maximum repetition times of a PDSCH (physical Downlink shared channel) and the maximum repetition times of a PUSCH (physical uplink shared channel) according to the coverage grade and a first preset table;

specifically, during the random access process of the terminal, according to the coverage level corresponding to the terminal and the first preset table, the maximum number of repetitions of the PDCCH channel, the maximum number of repetitions of the PDSCH channel, and the maximum number of repetitions of the PUSCH channel corresponding to the terminal may be obtained from the first preset table. It should be noted that the first preset table stores the maximum number of repetitions of the PDCCH channel, the maximum number of repetitions of the PDSCH channel, and the maximum number of repetitions of the PUSCH channel based on the minimum demodulation performance requirement for each coverage class. The maximum number of repetitions of the PDCCH channel is denoted as PDCCH-MaxNumRepetitions, the maximum number of repetitions of the PDSCH channel is denoted as MDL, and the maximum number of repetitions of the PUSCH channel is denoted as MUL.

Step 102: calculating to obtain a PDCCH channel period according to the PDCCH channel maximum repetition number, the PDSCH channel maximum repetition number, the PUSCH channel maximum repetition number and a preset service factor;

specifically, a cycle factor can be calculated according to the maximum number of repetitions of the PDCCH channel, the maximum number of repetitions of the PDSCH channel, the maximum number of repetitions of the PUSCH channel, and a preset service factor, and a PDCCH channel cycle can be calculated according to the cycle factor and the maximum number of repetitions of the PDCCH channel. It should be noted that the service factor is preset, and a value of the service factor is determined according to the service data size and the delay requirement of the terminal.

Step 103: acquiring the actual repetition times of a PDCCH (physical downlink control channel) and the actual repetition times of a PDSCH (physical downlink shared channel) and/or the actual repetition times of a PUSCH (physical uplink shared channel) by using a second preset table according to the coverage grade and the measurement parameters reported by the terminal;

specifically, the device obtains a measurement parameter reported by the terminal, where the measurement parameter may be a reference signal received power or a signal-to-noise ratio, the measurement parameter is reported by the terminal in real time or periodically, and the device obtains, according to a coverage level of the terminal and the reported measurement parameter, a PDCCH channel actual repetition number, a PDSCH channel actual repetition number, and a PUSCH channel actual repetition number from a second preset table. It should be noted that there are 5 parameters in the second preset table, namely: the coverage level of the terminal, the measurement parameters reported by the terminal, the actual repetition times of the PDCCH, the actual repetition times of the PDSCH and the actual repetition times of the PUSCH can be determined according to the coverage level and the measurement parameters.

Step 104: and determining the number of wireless frames required by a transmission block on a PDSCH channel and the number of wireless frames required by a transmission block on a PUSCH channel according to the buffer status report and the modulation coding mode reported by the terminal or according to the downlink buffer size and the modulation coding mode.

Specifically, another preset table may be pre-established in the device, where parameters included in the preset table include a wireless frame number, a modulation coding mode, a frequency point number, and a transmission block size, where the modulation coding mode may be determined by channel quality, the frequency point number may be determined by a capability level of the terminal, and a buffer status report reported by the terminal or a downlink buffer size of the device may be obtained, where a data amount to be transmitted may be determined according to the buffer status report and the downlink buffer size, and after the frequency point, the modulation coding mode, and the data amount to be transmitted are determined, a wireless frame number required by a suitable transmission block may be searched from the preset table. It should be noted that the content transmitted on the PDSCH channel and the PUSCH channel is a transport block. The modulation coding mode and the number of frequency points may also be determined by other methods, and the embodiment of the present invention is not limited in particular.

According to the embodiment of the invention, the maximum repetition times of a PDCCH (physical Downlink control channel), the maximum repetition times of a PDSCH (physical Downlink shared channel) and the maximum repetition times of a PUSCH (physical uplink shared channel) are obtained according to the coverage level and a first preset table, and then the PDCCH period is obtained according to a service factor; and acquiring the actual repetition times of the PDCCH, the PDSCH and the PUSCH according to the coverage grade, the measurement parameters and the second preset table, and determining the number of wireless frames required by one transmission block on the PDSCH and the PUSCH, so that the corresponding parameters are transmitted more reasonably through RRC signaling and DCI signaling, and the utilization rate of channel resources is improved.

On the basis of the foregoing embodiment, the calculating a PDCCH channel period according to the PDCCH channel maximum repetition number, the PDSCH channel maximum repetition number, the PUSCH channel maximum repetition number, and a preset service factor includes:

calculating to obtain a cycle factor according to the PDCCH channel maximum repetition number, the PDSCH channel maximum repetition number, the PUSCH channel maximum repetition number and the service factor;

and calculating the period of the PDCCH according to the period factor and the maximum repetition times of the PDCCH.

Specifically, the device calculates and obtains a period factor according to the obtained maximum number of repetitions of the PDCCH channel, the obtained maximum number of repetitions of the PDSCH channel, the obtained maximum number of repetitions of the PUSCH channel, and the service factor, wherein the period factor is related to the service characteristics of the terminal and the channel repetition number, and the service factor is determined according to the service characteristics, where the service characteristics refer to the service data volume and the delay requirement corresponding to the terminal. Therefore, firstly, the service factor is determined according to the service characteristics, and the cycle factor is obtained by calculation according to the service factor, the maximum repetition times of the PDCCH, the maximum repetition times of the PDSCH and the maximum repetition times of the PUSCH. And calculating to obtain the PDCCH channel period corresponding to the PDCCH channel according to the period factor and the PDCCH channel maximum repetition times.

According to the embodiment of the invention, the period factor is obtained through calculation of the maximum repetition times of the PDCCH, the PDSCH, the PUSCH and the service factor, and the PDCCH period is obtained according to the period factor and the maximum repetition times of the PDCCH, so that the corresponding PDCCH period is reasonably determined for the PDCCH.

On the basis of the above embodiment, the method further includes:

acquiring a corresponding NF value from an NF mapping table according to the number of the wireless frames required by the transmission block, wherein the NF value is greater than or equal to 0;

calculating according to the wireless frame number corresponding to the actual repetition number of the PDCCH and the PDCCH period to obtain the maximum transmission wireless frame number of the PDSCH channel and the maximum transmission wireless frame number of the PUSCH channel;

if the product of the number of wireless frames occupied by one transmission block corresponding to the NF value and the actual number of times of repetition of the PDSCH channel is greater than the maximum number of wireless frames transmitted by the PDSCH channel, reducing the NF value until the product is less than or equal to the maximum number of wireless frames transmitted by the PDSCH channel or the NF value is 0; and/or

And if the product of the number of the transmittable wireless frames corresponding to the NF value and the actual number of times of repetition of the PUSCH is greater than the maximum number of the PUSCH transmission wireless frames, reducing the NF value until the product is less than or equal to the maximum number of the PUSCH transmission wireless frames or the NF value is 0.

Specifically, after determining the number of radio frames required by one transport block on the PDSCH channel and the PUSCH channel, obtaining a corresponding NF value from an NF mapping table according to the number of radio frames corresponding to the one transport block, it should be noted that the NF mapping tables corresponding to the uplink transport block and the downlink transport block are different, where the NF mapping table of the uplink transport block is shown in table 1:

TABLE 1

NF value	Number of radio frames
		0	1
1	2
		2	4
3	8

The NF mapping table of the downlink transport block is shown in table 2:

TABLE 2

For the NF mapping table of the uplink transmission block, when the NF value is 0, the NF mapping table indicates that the number of wireless frames occupied by one transmission block is 1 wireless frame; when the NF value is 1, the number of wireless frames occupied by one transmission block is 2; when the NF value is 2, the number of the wireless frames occupied by one transmission block is 4; when the NF value is 3, it indicates that the number of radio frames occupied by one transport block is 8 radio frames. Wherein, one radio frame is 25ms, and assuming that the number of radio frames required by the device to determine one transport block is 6, the NF value is selected from the NF mapping table to be 3.

The number of the wireless frames actually occupied by the PDCCH can be determined according to the actual repetition times of the PDCCH, and one wireless frame is repeatedly occupied once, so the maximum transmission wireless frame number of the PDSCH and the maximum transmission wireless frame number of the PUSCH can be calculated according to the wireless frame number corresponding to the actual repetition times of the PDCCH and the maximum transmission wireless frame number of the PDCCH.

Multiplying the number of wireless frames occupied by a transmission block corresponding to the NF value by the actual number of times of the PDSCH channel, if the product is greater than the maximum number of wireless frames transmitted by the PDSCH channel, reducing the NF value according to the principle of preferentially ensuring transmission quality and data segmented transmission, for example, reducing the NF value from 3 to 2, multiplying the number of the wireless frames transmitted corresponding to the NF value of 2 by the actual number of times of the PDSCH channel again, and if the product is less than or equal to the maximum number of wireless frames transmitted by the PDSCH channel, determining the NF value to be 2; if the product is still larger than the maximum transmission wireless frame number of the PDSCH channel, the NF value is reduced again until the NF value is 0, and for the uplink transmission block, when the NF value is 0, the transmission block occupies one wireless frame number.

And similarly, multiplying the number of the wireless frames occupied by one transmission block corresponding to the NF value by the actual repetition times of the PUSCH, and if the obtained product is greater than the maximum transmission wireless frame number of the PUSCH, reducing the NF value until the product is less than or equal to the maximum transmission wireless frame number of the PUSCH or the NF value is reduced to 0. The specific adjustment method is consistent with the above description, and is not repeated here.

The embodiment of the invention obtains the corresponding NF value from the NF mapping table through the wireless frame number required by the transmission block, and compares the product of the wireless frame number occupied by one transmission block corresponding to the NF value and the actual repetition number of the PDSCH channel with the maximum wireless frame number of the PDSCH channel for transmission, or compares the product of the wireless frame number occupied by one transmission block corresponding to the NF value and the actual repetition number of the PUSCH channel with the maximum wireless frame number of the PUSCH channel for transmission to adjust the NF value, thereby obtaining the final NF value and leading the DCI instruction to reasonably transmit the NF value.

On the basis of the above embodiment, the method further includes:

if the NF value is judged to be 0 and the product of the number of wireless frames occupied by one transmission block corresponding to the NF value and the actual number of times of repetition of the PDSCH channel is greater than the maximum number of wireless frames transmitted by the PDSCH channel, reducing the actual number of times of repetition of the PDSCH channel; and/or

And if the NF value is judged to be 0 and the product of the number of the wireless frames occupied by one transmission block corresponding to the NF value and the actual repetition number of the PUSCH is greater than the maximum transmission wireless frame number of the PUSCH, reducing the actual repetition number of the PUSCH.

Specifically, if the NF value is 0 and the product of the number of radio frames occupied by one transport block corresponding to the NF value and the actual number of repetitions of the PDSCH channel is still greater than the maximum number of radio frames transmitted by the PDSCH channel, the NF value cannot be decreased again, and the transmission requirement can only be met by decreasing the actual number of repetitions of the PDSCH channel. Similarly, on the basis that the NF value is equal to 0, the product of the number of radio frames occupied by one transport block corresponding to the NF value and the actual number of repetitions of the PUSCH channel is still greater than the maximum number of radio frames transmitted by the PUSCH channel, and the transmission requirement can only be met by reducing the actual number of repetitions of the PUSCH channel.

The embodiment of the invention meets the transmission requirement by adjusting the actual repetition times of the PDSCH channel and the PUSCH channel, thereby determining the actual repetition times of the PUSCH channel and the actual repetition times of the PUSCH channel.

On the basis of the above embodiment, the calculating and obtaining a periodicity factor according to the maximum number of repetitions of the PDCCH channel, the maximum number of repetitions of the PDSCH channel, the maximum number of repetitions of the PUSCH channel, and a preset traffic factor includes:

wherein PDCCH-StartF is the periodicity factor, StartF _ dlrepeat is equal to the PDSCH channel maximum repetition times divided by the PDCCH channel maximum repetition times, StartF _ ulrepeat is equal to the PUSCH channel maximum repetition times divided by the PDCCH channel maximum repetition times, and StartF _ traffic is the traffic factor;

correspondingly, the calculating the period of the PDCCH channel according to the period factor and the maximum repetition number of the PDCCH channel includes:

the product of the periodicity factor and the maximum number of repetitions of the PDCCH channel is the PDCCH channel periodicity.

Specifically, the cycle factor can be calculated according to the maximum repetition number of the PUCCH channel, the maximum repetition number of the PDSCH channel, the maximum repetition number of the PUSCH channel, and a preset service factor, and the calculation formula is as follows:

wherein, the StartF _ dlepetition is equal to the maximum number of PUSCH channel repetitions divided by the maximum number of PDCCH channel repetitions, and from the viewpoint of coverage class, it is to be ensured that the size of the PDCCH channel period is at least not less than the number of radio frames required for the maximum number of terminal PDSCH channel repetitions, and therefore, the calculation formula of StartF _ dlepetition is:

StartF_dlrepetition＝MDL/PDCCH-MaxNumRepetitions，

wherein, MDL is the maximum repetition times of the PDSCH channel, and PDCCH-MaxUMRepetitions is the maximum repetition times of the PDCCH channel.

The StartF _ ulrepetition is a quotient of a maximum repetition number of a PUSCH channel and a maximum repetition number of a PDCCH channel, and from the viewpoint of coverage level, the size of a PDCCH channel period is guaranteed to be at least not less than the number of radio frames required by the maximum repetition number of the PUSCH channel of a terminal, so the calculation formula of the StartF _ ulrepetition is as follows:

StartF_ulrepetition＝MUL/PDCCH-MaxNumRepetitions，

wherein, MUL is the maximum repetition time of the PUSCH channel, and PDCCH-MaxUMRepetitions is the maximum repetition time of the PDCCH channel.

StartF _ traffic is a service factor, and power service borne by the TD-LTE230 network is required to be adapted in consideration of terminal service requirements. For example, when the data volume of the load control service is small and the delay requirement is high, the value of the StartF _ traffic is selected from the range of {2,4,8 }; for data acquisition services, the data volume is large, data arrive in a burst manner, but the data are not sensitive to time delay, and the value of StartF _ traffic can be selected within the range of {32,48 and 64 }; for services such as video monitoring and voice, the data volume is large, data is generated continuously, the time delay requirement is high, and the value of StartF _ traffic is selected in the range of {8,16 and 32 }. The data volume and the time delay can be subjected to threshold division, different values correspond to different data volumes and time delays, and the final value of the StartF _ traffic can be determined according to the specific data volume and time delay.

And after the periodicity factor is calculated, taking the product of the periodicity factor and the maximum repetition times of the PDCCH as the PDCCH period.

On the basis of the above embodiment, the method further includes:

and determining the time offset corresponding to the PDCCH according to the PDCCH period, wherein the time offset is any value in [0, the PDCCH period).

Specifically, the transmission parameters corresponding to the PDCCH channel further include a time offset, and after the PDCCH channel period is determined, the time offset may be determined according to the PDCCH channel period, if: the PDCCH period is 100ms, the time offset is any value between [0,100), and the time offset between terminals is randomized, so that the condition of PDCCH channel period resource conflict can be reduced.

On the basis of the above embodiment, the method further includes:

transmitting the PDCCH channel maximum repetition times, the PDCCH channel period and the time offset through an RRC instruction;

and transmitting the actual number of times of the PDCCH channel, the actual number of times of the PDSCH channel, the actual number of times of the PUSCH channel, the number of wireless frames required by one transmission block on the PDSCH channel and the number of wireless frames required by one transmission block on the PUSCH channel through DCI signaling.

Specifically, the maximum number of repetitions of the PDCCH channel, the PDSCH channel period, and the time offset are determined according to a coverage level of the terminal when performing random access, and therefore, the above parameters are not changed frequently, and are transmitted through RRC signaling since the transmission period of RRC signaling is longer than the transmission period of DCI signaling. The actual number of times of repetition of the PDCCH channel, the actual number of times of repetition of the PDSCH channel, the actual number of times of repetition of the PUSCH channel, the number of wireless frames required for one transport block on the PDSCH channel, and the number of wireless frames required for one transport block on the PUSCH channel may be determined according to the coverage level of the terminal, the reported measurement parameter, the buffer status report, and the downlink buffer size, where the change of the measurement parameter, the buffer status report, and the downlink buffer size reported by the terminal is real-time, so each of the above parameters may change at any time, and the transmission period of the DCI signaling is short, so the parameters may be transmitted through the DCI signaling.

Fig. 2 is a schematic diagram of a method for determining channel transmission parameters according to another embodiment of the present invention, as shown in fig. 2, data transmission parameters are related to a service condition carried by a terminal, a coverage condition of the terminal, and other parameters, where the other parameters include a service data packet, a measurement parameter reported by the terminal, a buffer status report, a downlink buffer size, and the like, and the method for determining and adjusting the transmission parameters by combining RRC signaling semi-static configuration and DCI dynamic indication can better match service requirements of the terminal and improve resource utilization efficiency. In the service parameters, the QCI-related service characteristics and the updating frequency are low, the method is suitable for configuring the PDCCH period through RRC signaling semi-static state, the size, the arrival time and other real-time changes of a service data packet are suitable for dynamically adjusting the number of wireless frames occupied by a transmission block and the number of repetition times through DCI; in the coverage parameters, the coverage grade is a cell-level parameter, the cell divides the terminals into several types of coverage grades, the maximum repetition number of the PDCCH channel, the PDCCH channel period and the time offset are semi-statically configured through RRC signaling, the actual position of each terminal, the channel condition and the like are changed in real time, and the difference exists among the terminals, so that the method is suitable for dynamically changing the actual repetition number of the PDCCH channel, the actual repetition number of the PDSCH channel, the actual repetition number of the PUSCH channel, the number of wireless frames required by a transmission block transmitted on the PDSCH channel and the number of wireless frames required by the transmission block transmitted on the PUSCH channel through DCI.

The PDCCH period parameter is configured by RRC signaling and is indicated by the following parameters:

PDCCH-MaxNumRepetitions: the maximum number of repetitions of PDCCH, in frames (25 ms); values are {1,2,4,8,16,32,64,128,256,512,1024,2048 };

PDCCH-StartF: the PDCCH periodic factor takes the value of {2,4,8,16,32,48 and 64 };

PDCCH-Offset: a time offset parameter for a PDCCH starting position; the value is {0,1/8,1/4,3/8 };

the PDCCH period size is the product of PDCCH-NumRepetitions and PDCCH-StartF.

The PDCCH, PDSCH and/or PUSCH transmission formats are indicated by DCI, indicated by several parameters:

PDCCH-NumRepetitions: the actual number of repetitions of the PDCCH channel, in frames (25 ms); values are {1,2,4,8,16,32,64,128,256,512,1024,2048 };

PUSCH-NumRepetitions: the actual number of repetitions of the PUSCH channel, in frames (25 ms); values are {1,2,4,8,16,32,64,128,256,512,1024,2048 };

PDSCH-NumRepetitions: the number of actual repetitions of the PDSCH channel, in frames (25 ms); values are {1,2,4,8,16,32,64,128,256,512,1024,2048 };

PDSCH-NF: indicating the number of radio frames occupied by a downlink transmission block; taking the value as {1,2,3,4,5,6,7,8 };

PUSCH-NF: indicating the number of radio frames occupied by one uplink transmission block; the value is {1,2,4,8 }.

The embodiment of the invention transmits the transmission parameters of the PDCCH, the PDSCH and the PUSCH through the two-stage mechanism of RRC signaling and DCI signaling, reasonably determines each transmission parameter, reasonably transmits each transmission parameter, and improves the utilization rate of each channel resource.

Fig. 3 is a schematic structural diagram of a device for determining channel transmission parameters according to an embodiment of the present invention, and as shown in fig. 3, the device includes: a maximum repetition number determining module 301, a period determining module 302, an actual repetition number determining module 303, and a wireless frame number determining module 304, wherein:

the maximum repetition number determining module 301 is configured to obtain a coverage level corresponding to the terminal, and obtain a PDCCH channel maximum repetition number, a PDSCH channel maximum repetition number, and a PUSCH channel maximum repetition number according to the coverage level and a first preset table; the period determining module 302 is configured to calculate a PDCCH channel period according to the PDCCH channel maximum repetition number, the PDSCH channel maximum repetition number, the PUSCH channel maximum repetition number, and a preset service factor; the actual repetition number determining module 303 is configured to obtain, according to the coverage level and the measurement parameter reported by the terminal, an actual repetition number of the PDCCH channel, an actual repetition number of the PDSCH channel, and/or an actual repetition number of the PUSCH channel by using a second preset table; the radio frame number determining module 304 is configured to determine a radio frame number required by a transmission block on a PDSCH channel and a radio frame number required by a transmission block on a PUSCH channel according to the buffer status report and the modulation and coding scheme reported by the terminal, or according to the downlink buffer size and the modulation and coding scheme.

Specifically, in the process of performing random access by the terminal, the maximum repetition number determining module 301 may obtain, according to the coverage level corresponding to the terminal and the first preset table, the maximum repetition number of the PDCCH channel, the maximum repetition number of the PDSCH channel, and the maximum repetition number of the PUSCH channel corresponding to the terminal from the first preset table. It should be noted that the first preset table stores the maximum number of repetitions of the PDCCH channel, the maximum number of repetitions of the PDSCH channel, and the maximum number of repetitions of the PUSCH channel based on the minimum demodulation performance requirement for each coverage class. The period determining module 302 may calculate a period factor according to the maximum number of repetitions of the PDCCH channel, the maximum number of repetitions of the PDSCH channel, the maximum number of repetitions of the PUSCH channel, and a preset service factor, and may calculate a PDCCH channel period according to the period factor and the maximum number of repetitions of the PDCCH channel. It should be noted that the service factor is preset, and a value of the service factor is determined according to the service data size and the delay requirement of the terminal. The actual repetition number determining module 303 obtains a measurement parameter reported by the terminal, where the measurement parameter may be a reference signal received power or a signal-to-noise ratio, the measurement parameter is reported by the terminal in real time or periodically, and the device obtains, according to the coverage level of the terminal and the reported measurement parameter, a PDCCH channel actual repetition number, a PDSCH channel actual repetition number, and a PUSCH channel actual repetition number from a second preset table. Another preset table may be pre-established in the device, where parameters included in the preset table include a wireless frame number, a modulation coding mode, a frequency point number, and a size of a transmission block, where the modulation coding mode may be determined by channel quality, the frequency point number may be determined by a capability level of the terminal, and the wireless frame number determination module 304 acquires a buffer status report reported by the terminal or a downlink buffer size of the device, where a data amount to be transmitted may be determined according to the buffer status report and the downlink buffer size, and after the frequency point, the modulation coding mode, and the data amount to be transmitted are determined, a wireless frame number required by a suitable transmission block may be searched from the preset table. It should be noted that the content transmitted on the PDSCH channel and the PUSCH channel is a transport block.

The embodiment of the device provided by the present invention may be specifically configured to execute the processing flows of the above method embodiments, and the functions of the device are not described herein again, and refer to the detailed description of the above method embodiments.

Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 4, the electronic device includes: a processor (processor)401, a memory (memory)402, and a bus 403; wherein the content of the first and second substances,

the processor 401 and the memory 402 complete communication with each other through the bus 403;

the processor 401 is configured to call the program instructions in the memory 402 to execute the methods provided by the above-mentioned method embodiments, for example, including: acquiring a coverage grade corresponding to a terminal, and acquiring the maximum repetition times of a PDCCH (physical Downlink control channel), the maximum repetition times of a PDSCH (physical Downlink shared channel) and the maximum repetition times of a PUSCH (physical uplink shared channel) according to the coverage grade and a first preset table; calculating to obtain a PDCCH channel period according to the PDCCH channel maximum repetition number, the PDSCH channel maximum repetition number, the PUSCH channel maximum repetition number and a preset service factor; acquiring the actual repetition times of a PDCCH (physical Downlink control channel), the actual repetition times of a PDSCH (physical Downlink shared channel) and the actual repetition times of a PUSCH (physical uplink shared channel) by using a second preset table according to the coverage grade and the measurement parameters reported by the terminal; and determining the number of wireless frames required by a transmission block on a PDSCH channel and a PUSCH channel according to the buffer status report and the modulation coding mode reported by the terminal or according to the downlink buffer size and the modulation coding mode.

The present embodiment discloses a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the method provided by the above-mentioned method embodiments, for example, comprising: acquiring a coverage grade corresponding to a terminal, and acquiring the maximum repetition times of a PDCCH (physical Downlink control channel), the maximum repetition times of a PDSCH (physical Downlink shared channel) and the maximum repetition times of a PUSCH (physical uplink shared channel) according to the coverage grade and a first preset table; calculating to obtain a PDCCH channel period according to the PDCCH channel maximum repetition number, the PDSCH channel maximum repetition number, the PUSCH channel maximum repetition number and a preset service factor; acquiring the actual repetition times of a PDCCH (physical Downlink control channel), the actual repetition times of a PDSCH (physical Downlink shared channel) and the actual repetition times of a PUSCH (physical uplink shared channel) by using a second preset table according to the coverage grade and the measurement parameters reported by the terminal; and determining the number of wireless frames required by a transmission block on a PDSCH channel and a PUSCH channel according to the buffer status report and the modulation coding mode reported by the terminal or according to the downlink buffer size and the modulation coding mode.

The present embodiments provide a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform the methods provided by the above method embodiments, for example, including: acquiring a coverage grade corresponding to a terminal, and acquiring the maximum repetition times of a PDCCH (physical Downlink control channel), the maximum repetition times of a PDSCH (physical Downlink shared channel) and the maximum repetition times of a PUSCH (physical uplink shared channel) according to the coverage grade and a first preset table; calculating to obtain a PDCCH channel period according to the PDCCH channel maximum repetition number, the PDSCH channel maximum repetition number, the PUSCH channel maximum repetition number and a preset service factor; acquiring the actual repetition times of a PDCCH (physical Downlink control channel), the actual repetition times of a PDSCH (physical Downlink shared channel) and the actual repetition times of a PUSCH (physical uplink shared channel) by using a second preset table according to the coverage grade and the measurement parameters reported by the terminal; and determining the number of wireless frames required by a transmission block on a PDSCH channel and a PUSCH channel according to the buffer status report and the modulation coding mode reported by the terminal or according to the downlink buffer size and the modulation coding mode.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

The above-described embodiments of the devices and the like are merely illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A method for determining channel transmission parameters, comprising:

acquiring the actual repetition times of the PDCCH, the PDSCH and the PUSCH by using a second preset table according to the coverage grade and the measurement parameters reported by the terminal;

2. The method of claim 1, wherein the calculating the obtained PDCCH channel period according to the PDCCH channel maximum repetition number, the PDSCH channel maximum repetition number, the PUSCH channel maximum repetition number and a preset traffic factor comprises:

3. The method of claim 1, further comprising:

And if the product of the number of the wireless frames occupied by one transmission block corresponding to the NF value and the actual repetition times of the PUSCH is greater than the maximum transmission wireless frame number of the PUSCH, reducing the NF value until the product is less than or equal to the maximum transmission wireless frame number of the PUSCH or the NF value is 0.

4. The method of claim 3, further comprising:

5. The method of claim 2, wherein the calculating a periodicity factor according to the PDCCH channel maximum repetition number, the PDSCH channel maximum repetition number, the PUSCH channel maximum repetition number, and a preset traffic factor comprises:

6. The method according to any one of claims 1-5, further comprising:

7. The method of claim 6, further comprising:

8. A channel transmission parameter determination device, comprising:

the actual repetition number determining module is used for obtaining the actual repetition number of the PDCCH, the actual repetition number of the PDSCH and the actual repetition number of the PUSCH by utilizing a second preset table according to the coverage grade and the measurement parameters reported by the terminal;

9. An electronic device, comprising: a processor, a memory, and a bus, wherein,

the processor and the memory are communicated with each other through the bus;

the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any one of claims 1-7.

10. A non-transitory computer-readable storage medium storing computer instructions that cause a computer to perform the method of any one of claims 1-7.