WO2019144345A1

WO2019144345A1 - Data transmission method and related apparatus

Info

Publication number: WO2019144345A1
Application number: PCT/CN2018/074155
Authority: WO
Inventors: 费永强; 余政; 南方; 程型清
Original assignee: 华为技术有限公司
Priority date: 2018-01-25
Filing date: 2018-01-25
Publication date: 2019-08-01
Also published as: CN111418250B; CN111418250A

Abstract

Disclosed are a data transmission method and a related apparatus. The method comprises: a terminal device receiving first downlink control information sent by a network device, wherein the first downlink control information is used for scheduling first uplink data transmission, and the first downlink control information comprises information of the number of repetitions of a physical uplink shared channel; the terminal device determining a first search space according to the information of the number of repetitions of the physical uplink shared channel; and the terminal device detecting second downlink control information in the first search space, wherein the second downlink control information is used for feeding back first uplink data and/or scheduling second uplink data transmission.

Description

Data transmission method and related device

Technical field

The present application relates to the field of communications, and in particular, to a data transmission method and related apparatus.

Background technique

In order to enhance the transmission reliability, a hybrid automatic repeat request (HARQ) technology is introduced in the machine type communication (MTC), that is, the base station configures the user equipment (UE) to be the same. The data is repeatedly transmitted several times, and the base station performs combined reception detection. After all the repetitions of the UE transmitting a certain HARQ process are completed, the base station passes the physical downlink control channel (MPDCCH) through the machine type communication. Downlink control information (DCI) carried in the DCI feeds back to the UE whether the uplink data is correctly received. That is to say, the UE repeatedly transmits data repeatedly until the number of repetitions of the base station configuration is reached. This wastes both the spectrum resources and the power consumption of the UE. For example, if the network device configures the number of repeated transmissions of the UE to be 1024 times, if the base station correctly demodulates the data transmitted after receiving the first 256 transmissions of the UE, the subsequent 748 transmissions of the UE are actually uplink transmission resources and Waste of UE battery energy.

In order to avoid waste of resources, the prior art introduces a feedback mechanism for the uplink data of the UE, so that in the above case, the network device can terminate the uplink data transmission of the UE in advance. For example, the MPDCCH carries a DCI, and carries an acknowledgement (ACK) to the UE, instructing the UE to end the repeated transmission. The DCI that schedules repeated transmissions and the DCI that carries the ACK indication may be that the UE searches in a UE-specific search space (USS).

However, the number of repetitions of a UE on a physical uplink shared channel (PUSCH) varies widely, and can change very dynamically. For example, the previous DCI indicates that the number of PUSCH repetitions is 64, and the next DCI indicates the PUSCH. The number of repetitions is 2048. If the configured USS has a large interval in the time domain, as shown in Figure 1, the UE acquires DCI that schedules PUSCH repeated transmission 64 times in USS1, and the UE starts to transmit uplink data 64 times repeatedly, then at 64. After the secondary transmission is completed, the UE detects the feedback DCI at the next USS (that is, USS2), and cannot end the repetition in advance, which still causes waste of resources; if the configured USS has a small interval in the time domain, as shown in Figure 2 In the USS1, the UE acquires DCI that schedules repeated transmissions of 2048 times, and the UE starts to transmit data 2048 times repeatedly. A large number of USSs will appear before the end of the repetition. In order to search for possible feedback DCI, the UE searches all the USSs. Detecting whether there is feedback DCI, which will cause the UE to perform blind detection frequently, and increase unnecessary energy consumption of the UE.

Summary of the invention

The embodiment of the present application provides a data transmission method and related apparatus for saving resources.

In view of this, the first aspect of the present application provides a data transmission method, where the method includes: receiving, by a terminal device, a first downlink control information, where the network device sends a first uplink data transmission, where the first downlink is The control information includes information about the number of repetitions of the physical uplink shared channel. After receiving the first downlink control information, the terminal device determines the first search space according to the repetition number information of the physical uplink shared channel in the first downlink control information, and then determines the first search space. A second downlink control information for feeding back the first uplink data and/or scheduling the second uplink data transmission is detected in a search space.

It should be noted that the repetition quantity information of the physical uplink shared channel in the implementation manner may also be information about the repetition times of other similar uplink channels.

In this implementation manner, the search space may change dynamically as the number of repetitions information changes, that is, the network device may dynamically configure the search space to adapt to the dynamic change of the repetition number information, so that when the number of repetitions of the PUSCH is relatively small, the repetition may be terminated early. To avoid waste of resources; when the number of repetitions is relatively large, the UE can avoid frequent blind detection and save resources.

With reference to the first aspect of the present application, in the first implementation manner of the first aspect of the present application, the repetition quantity information of the PUSCH indicates the number of repetitions of the PUSCH, that is, the number of times the terminal device repeatedly transmits the first uplink data, in this implementation manner, The terminal device may determine the first search space according to the ratio of the number of repetitions indicated by the repetition number information of the PUSCH to the ratio of r _max · G, where r _max is the number of repetitions of the maximum physical downlink control channel configured by the RRC signaling, and G is The parameter of RRC signaling configuration, G is greater than or equal to 1.

The number of repetitions of the maximum physical downlink control channel can be understood as the maximum number of repeated transmissions of MPDCCH in one search space.

The implementation provides a method for determining the implementation of the first search space, and improves the achievability of the solution.

With reference to the first implementation manner of the first aspect of the present application, in a second implementation manner of the first aspect of the application, the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G,α _Offset =0, if the ratio of the repetition number of the physical uplink shared channel to r _max · G is greater than or equal to the first threshold, β=1; if the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than the first threshold, then 0<β<1.

It should be noted that r _max is the number of repetitions of the maximum physical downlink control channel configured by the RRC signaling, and the r _max is also the duration of the first search space, according to the initial subframe corresponding to the first search space and The first search space can determine the first search space for the duration of the search.

With reference to the first implementation manner of the first aspect of the present application, in a third implementation manner of the first aspect of the application, the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G,α _Offset =0, if the ratio of the repetition number of the physical uplink shared channel to r _max · G is greater than the first threshold, β=1; if the ratio of the number of repetitions of the PUSCH to r _max · G is less than or equal to the first threshold, then 0<β<1.

With reference to the first implementation manner of the first aspect of the present application, in a fourth implementation manner of the first aspect of the application, the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G,α _Offset =0, if the ratio of the number of repetitions of the physical uplink shared channel to r _max · G is less than or equal to the second threshold, β=1; if the ratio of the number of repetitions of the physical uplink shared channel to r _max · G is greater than or equal to The first threshold value, β=1; if the ratio of the number of repetitions of the PUSCH to the ratio of r _max ·G is greater than the second threshold value and less than the first threshold value, then 0<β<1.

With reference to the first implementation manner of the first aspect of the present application, in a fifth implementation manner of the first aspect of the application, the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G, if PUSCH The ratio of the number of repetitions to the ratio of r _max · G is greater than or equal to the first threshold value, α _offset =0; if the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than the first threshold, α _offset = {0, u ₁ , u ₂ ... u _n }, where _n ≥ 1, 0 < u _i < 1, i is an integer greater than or equal to 1 and less than or equal to n.

With reference to the first implementation manner of the first aspect of the present application, in a sixth implementation manner of the first aspect of the application, the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G, if PUSCH The ratio of the number of repetitions to r _max · G is greater than the first threshold, α _offset =0; if the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than or equal to the first threshold, α _offset = {0, u ₁ , u ₂ ... u _n }, where _n ≥ 1, 0 < u _i < 1, i is an integer greater than or equal to 1 and less than or equal to n.

With reference to the first implementation manner of the first aspect of the present application, in the seventh implementation manner of the first aspect of the application, the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G, if PUSCH The ratio of the number of repetitions to r _max · G is less than or equal to the second threshold value, α _offset =0; if the ratio of the number of repetitions of the physical uplink shared channel to r _max · G is greater than or equal to the first threshold, α _offset = 0; if the number of repetitions of PUSCH is

The ratio is greater than the second threshold and less than the first threshold, α _offset = {0, u ₁ , u ₂ ... u _n }, where _{n ≥} ₁ , 0 < u _i < 1, i is greater than or An integer equal to 1 and less than or equal to n.

With reference to the first aspect of the present application, any one of the first to the seventh implementation manners of the first aspect, in the eighth implementation manner of the first aspect of the present application, the first search space does not include the second The portion of the search space that overlaps in the time domain. The starting subframe of the second search space is a subframe that satisfies the following formula:

Where n _f ' is the frame number of the radio frame in which the start subframe of the second search space is located, and n _s ' is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G r _max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, and G is a parameter configured by RRC signaling, G is greater than or equal to 1, and α _offset '=0.

This implementation provides another way to determine the first search space, which improves the flexibility of the solution.

The second aspect of the present application provides a data transmission method, the method includes: receiving, by a terminal device, a first DCI sent by a network device for scheduling a first uplink data transmission, where the first DCI includes search space indication information, and the terminal device is configured according to The search space indication information determines a first search space, and then detects a second DCI for feeding back the first uplink data and/or scheduling the second uplink data transmission in the first search space.

In this implementation manner, the network device can dynamically indicate the search space, so that the dynamic change of the repetition number information can be adapted. When the number of repetitions of the PUSCH is relatively small, the repetition is terminated in advance to avoid waste of resources; when the number of repetitions is relatively large, the UE is avoided. Frequent blind detection saves resources.

With reference to the second aspect of the present application, in an implementation manner of the second aspect of the present application, determining, by the terminal device, the first search space according to the search space indication information may be: determining, by the terminal, the plurality of search spaces according to the search space indication information. A search space is the first search space.

It should be understood that the multiple search spaces mentioned in this implementation manner are search spaces determined by the terminal device according to RRC signaling, that is, search spaces configured by the network device through RRC signaling.

The implementation provides a specific manner for determining the first search space according to the search space indication information, and improves the achievability of the solution.

With reference to the second aspect of the present application, in the two implementation manners of the second aspect of the present application, the determining, by the terminal device, the first search space according to the search space indication information may be: the terminal device determines multiple search spaces according to the search space indication information. At least one of the search spaces, the search space obtained by the combination of the determined search spaces, that is, the first search space, that is, the time domain position corresponding to the first search space is each of the plurality of search spaces indicated by the search space indication information The frequency domain position of the first search space at a certain time is determined by the frequency domain position corresponding to at least one of the plurality of search spaces corresponding to the time.

This implementation provides another specific manner of determining the first search space according to the search space indication information, and improves the flexibility of the solution.

With reference to the second aspect of the present application, in the three implementation manners of the second aspect of the present application, the determining, by the terminal device, the first search space according to the search space indication information may be: the terminal device determines the first parameter G according to the search space indication information. The value of the first search space is determined according to the value of G. Specifically, the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G,r _Max is the number of repetitions of the maximum physical downlink control channel configured for RRC signaling, α _offset =0.

With reference to the second aspect of the present application, in a fourth implementation manner of the second aspect of the present application, the determining, by the terminal device, the first search space according to the search space indication information may be: the terminal device determines the second parameter α according to the search space indication information. Determining a set of values of the _offset , and determining a first search space according to the set of values. Specifically, the first search space includes a search space corresponding to each value in the set of values, and a search space corresponding to each value The starting subframe is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the starting subframe is located, and n _s is the slot number of the slot included in the starting subframe in the radio frame, T=r _max ·G, r _max is RRC signaling The number of repetitions of the configured maximum physical downlink control channel, G is a parameter configured by RRC signaling, and G is greater than or equal to 1.

With reference to the second aspect of the present application, in a fifth implementation manner of the second aspect of the present application, the determining, by the terminal device, the first search space according to the search space indication information may be: the terminal device determines the third parameter r according to the search space indication information. The value of _max is further determined according to the value of r _max . Specifically, the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G,G The parameter configured for RRC signaling, G is greater than or equal to 1, and α _offset =0.

With reference to the second aspect of the present application, in a sixth implementation manner of the second aspect of the present application, the determining, by the terminal device, the first search space according to the search space indication information may be: the terminal device determines the first parameter G according to the search space indication information. a value set and a set of values of the second parameter α _offset , and determining a first search space according to the set of values of the α _offset , specifically, the first search space includes a search space corresponding to each value in the set of values of the α _offset The starting subframe of the search space corresponding to each value is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the starting subframe is located, and n _s is the slot number of the slot included in the starting subframe in the radio frame, T=r _max ·G, r _max is RRC signaling The number of repetitions of the configured maximum physical downlink control channel.

With reference to the second aspect of the present application, in a seventh implementation manner of the second aspect of the present application, the determining, by the terminal device, the first search space according to the search space indication information may be: the terminal device determines the first parameter G according to the search space indication information. The value of the third parameter r _max is determined by the value of G and the value of r _max . Specifically, the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G,α _Offset =0.

With reference to the second aspect of the present application, in the eighth implementation manner of the second aspect of the present application, the determining, by the terminal device, the first search space according to the search space indication information may be: the terminal device determines the second parameter α according to the search space indication information. _Determining the value set of the _{offset and} the value of the third parameter r _max , and determining the first search space according to the value set of the α _{offset and} the value of the r _max . Specifically, the first search space includes each of the set of values of the α _offset The search space corresponding to the value, the starting subframe of the search space corresponding to each value is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the starting subframe is located, and n _s is the slot number of the slot included in the starting subframe in the radio frame, T=r _max ·G, G is the RRC signaling configuration The parameter, G is greater than or equal to 1.

With reference to the second aspect of the present application, in a ninth implementation manner of the second aspect of the present application, the determining, by the terminal device, the first search space according to the search space indication information may be: the terminal device determines the first parameter G according to the search space indication information. The value of the second parameter α _{offset and} the value of the third parameter r _max , and then determine the first search space according to the value of G, the value set of α _{offset and} the value of r _max , specifically, the first search The space includes a search space corresponding to each value in the set of values of the alpha _offset , and the starting subframe of the search space corresponding to each value is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the starting subframe is located, and n _s is the slot number of the slot included in the starting subframe in the radio frame, T=r _max ·G.

The third aspect of the present application provides a data transmission method, the method includes: the network device sends, to the terminal device, a first DCI for scheduling a first uplink data transmission, where the first DCI includes a repetition quantity information of the PUSCH, and then the network device Sending in the first search space for feeding back the first uplink data and/or scheduling the second uplink data transmission.

It should be noted that, in this implementation manner, the first search space corresponds to the repetition number information of the PUSCH, and the network device needs to determine the first search space before sending the second DCI, specifically before sending the first DCI, or After sending the first DCI.

It should be noted that the repetition number information of the PUSCH in this implementation manner may also be information about the repetition times of other similar uplink channels.

With reference to the third aspect of the present application, in the first implementation manner of the third aspect of the present application, the repetition quantity information of the PUSCH indicates the number of repetitions of the PUSCH, and the correspondence between the first search space and the repetition number information of the PUSCH specifically refers to the first search. The ratio of the number of repetitions of the space and the PUSCH to the ratio of r _max · G, where r _max is the number of repetitions of the maximum physical downlink control channel configured by the RRC signaling, and G is a parameter of the RRC signaling configuration, and G is greater than or equal to 1.

The number of repetitions of the maximum physical downlink control channel can be understood as the maximum number of times the physical downlink control channel is repeatedly transmitted in one search space.

With reference to the first implementation manner of the third aspect of the present application, in a second implementation manner of the third aspect of the present application, the starting subframe of the first search space determined by the network device is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G,α _Offset =0;

If the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is greater than or equal to the first threshold, β=1; if the ratio of the number of repetitions of the PUSCH to the ratio of r _max ·G is less than the first threshold, 0<β<1.

With reference to the first implementation manner of the third aspect of the present application, in a third implementation manner of the third aspect of the present application, the starting subframe of the first search space is a subframe that satisfies the following formula:

With reference to the first implementation manner of the third aspect of the present application, in a fourth implementation manner of the third aspect of the present application, the starting subframe of the first search space is a subframe that satisfies the following formula:

With reference to the first implementation manner of the third aspect of the present application, in a fifth implementation manner of the third aspect of the present application, the starting subframe of the first search space is a subframe that satisfies the following formula:

With reference to the first implementation manner of the third aspect of the present application, in a sixth implementation manner of the third aspect of the present application, the starting subframe of the first search space is a subframe that satisfies the following formula:

With reference to the first implementation manner of the third aspect of the present application, in a seventh implementation manner of the third aspect of the present application, the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G, if PUSCH The ratio of the number of repetitions to the ratio of r _max · G is less than or equal to the second threshold value, α _offset =0; if the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is greater than or equal to the first threshold value, α _offset =0; The ratio of the number of repetitions of the PUSCH to the ratio r _max · G is greater than the second threshold and less than the first threshold, α _offset = {0, u ₁ , u ₂ ... u _n }, where _{n ≥} ₁ , 0 < u _i <1, i is an integer greater than or equal to 1 and less than or equal to n.

With reference to the third aspect of the present application, any one of the first to the seventh implementation manners of the third aspect, in the eighth implementation manner of the first aspect of the present application, the first search space does not include the second The portion of the search space that overlaps in the time domain. The starting subframe of the second search space is a subframe that satisfies the following formula:

A fourth aspect of the present application provides a data transmission method, where the method includes: the network device sends a first DCI for scheduling the first uplink data transmission to the terminal device, and then the network device sends the information in the first search space. The first uplink data performs feedback and/or schedules a second uplink data transmission, where the first downlink DCI includes search space indication information, and the search space indication information is used by the terminal device to determine the first search space.

Specifically, in the implementation, the network device needs to determine the first search space before sending the second DCI, and may be before sending the first DCI or after sending the first DCI.

With reference to the fourth aspect of the present application, in a first implementation manner of the fourth aspect of the present application, the search space indication information indicates that the terminal device determines one search space from the plurality of search spaces as the first search space, where the implementation manner is The multiple search spaces referred to refer to multiple search spaces configured by the network device through RRC signaling.

This implementation provides a way to indicate the first search space, which improves the achievability of the solution.

With reference to the fourth aspect of the present application, in a second implementation manner of the fourth aspect of the present application, the search space indication information indicates that the terminal device determines at least one search space from the plurality of search spaces, and the determined search results of the at least one search space combination are obtained. The space is the first search space, that is, the time domain position corresponding to the first search space is obtained by superimposing the time domain position corresponding to each search space in the plurality of search spaces indicated by the search space indication information, and the first search space is The frequency domain location at a certain time is determined by the frequency domain location corresponding to at least one of the multiple search spaces corresponding to the time, wherein the multiple search spaces in the implementation manner refer to the network device passing the RRC letter. Make multiple search spaces configured.

This implementation provides another way of indicating the first search space, which improves the flexibility of the solution.

With reference to the fourth aspect of the present application, in a third implementation manner of the fourth aspect of the present application, the search space indication information is used to indicate a value of the first parameter G, where a starting subframe of the first search space is a sub- frame:

This implementation provides another specific way of indicating the first search space, which improves the flexibility of the solution.

With reference to the fourth aspect of the present application, in a fourth implementation manner of the fourth aspect, the search space indication information is used to indicate a value set of the second parameter α _offset , where the first search space includes each of the value sets. The search space corresponding to the value, the starting subframe of the search space corresponding to each value is a subframe that satisfies the following formula:

With reference to the fourth aspect of the present application, in a fifth implementation manner of the fourth aspect, the search space indication information is used to indicate a value of the third parameter r _max , where the starting subframe of the first search space is as follows Subframe:

With reference to the fourth aspect of the present application, in a sixth implementation manner of the fourth aspect, the search space indication information is used to indicate a value set of the first parameter G and a second parameter α _offset , where the first search space includes The search space corresponding to each value in the value set of the α _offset , and the starting subframe of the search space corresponding to each value is a subframe that satisfies the following formula:

With reference to the fourth aspect of the present application, in a seventh implementation manner of the fourth aspect, the search space indication information is used to indicate a value of the first parameter G and a value of the third parameter r _max , the start of the first search space. A subframe is a subframe that satisfies the following formula:

With reference to the fourth aspect of the present application, in an eighth implementation manner of the fourth aspect, the search space indication information is used to indicate a value set of the second parameter α _{offset and} a value of the third parameter r _max , the first search space. The search space corresponding to each value in the set of values of the alpha _offset , the starting subframe of the search space corresponding to each value is a subframe that satisfies the following formula:

With reference to the fourth aspect of the present application, in a ninth implementation manner of the fourth aspect, the search space indication information is used to indicate a value of the first parameter G, a value set of the second parameter α _offset , and a third parameter r _max The value of the first search space includes a search space corresponding to each value in the set of values of the alpha _offset , and the starting subframe of the search space corresponding to each value is a subframe that satisfies the following formula:

A fifth aspect of the present application provides a communication device having a function of implementing the behavior of a terminal device in the above first aspect. This function can be implemented in hardware or in hardware by executing the corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

A sixth aspect of the present application provides a communication device having a function of implementing the behavior of a terminal device in the second aspect described above. This function can be implemented in hardware or in hardware by executing the corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

The seventh aspect of the present application provides a network device having a function of implementing the behavior of the network device in the foregoing third aspect. This function can be implemented in hardware or in hardware by executing the corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

The eighth aspect of the present application provides a network device, which has a function of implementing the behavior of the network device in the fourth aspect. This function can be implemented in hardware or in hardware by executing the corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

A ninth aspect of the present application provides a communication device, where the network device includes: a processor, a memory;

Memory for storing programs;

The processor is configured to execute the program, and specifically includes the process performed by the terminal device as in the first aspect or the second aspect.

A tenth aspect of the present application provides a network device, where the network device includes: a processor, a memory;

Memory for storing programs;

The processor is configured to execute the program, and specifically includes the process performed by the network device as described in the foregoing third aspect or fourth aspect.

An eleventh aspect of the present application provides a computer storage medium comprising instructions which, when run on a computer, cause the computer to perform any of the methods of the first aspect to the second aspect described above.

A twelfth aspect of the present application provides a computer storage medium comprising instructions which, when run on a computer, cause the computer to perform any of the methods of the third to fourth aspects above.

A thirteenth aspect of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform any of the methods of the first aspect to the second aspect described above.

A fourteenth aspect of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform any of the methods of the third to fourth aspects above.

As can be seen from the above technical solutions, the embodiments of the present application have the following advantages:

In the embodiment of the present application, after receiving the first DCI sent by the network device, the terminal device determines the first search space according to the repetition quantity information of the physical uplink shared channel in the first DCI, and then in the first search space Two DCIs are tested. That is, the terminal device in the present application may determine the search space according to the repetition number information of the uplink channel, that is, the search space in the present application may change according to the dynamic change of the repetition number information, that is, the network device may dynamically configure the search space to adapt to the repetition number information. The dynamic change, so that when the number of repetitions of the PUSCH is relatively small, the repetition can be ended in advance to avoid waste of resources; when the number of repetitions is relatively large, the UE can avoid frequent blind detection and save resources.

DRAWINGS

1 is a schematic diagram of a USS in the prior art;

2 is another schematic diagram of a USS in the prior art;

3 is a schematic diagram of a data transmission system in an embodiment of the present application;

4 is a flowchart of an embodiment of a data transmission method in an embodiment of the present application;

FIG. 5 is a schematic diagram of a search space in an embodiment of the present application; FIG.

6 is another schematic diagram of a search space in an embodiment of the present application;

FIG. 7 is a flowchart of another embodiment of a data transmission method according to an embodiment of the present application;

FIG. 8 is a schematic diagram of an embodiment of a communication device according to an embodiment of the present application;

FIG. 9 is a schematic diagram of an embodiment of a communication device according to an embodiment of the present application;

FIG. 10 is a schematic diagram of an embodiment of a network device according to an embodiment of the present application;

FIG. 11 is a schematic diagram of an embodiment of a network device according to an embodiment of the present application;

FIG. 12 is a schematic diagram of an embodiment of a communication device according to an embodiment of the present application;

FIG. 13 is a schematic diagram of an embodiment of a network device according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application are described below with reference to the accompanying drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

The terms "first", "second", "third", "fourth", etc. (if present) in the specification and claims of the present application and the above figures are used to distinguish similar objects without having to use To describe a specific order or order. It is to be understood that the data so used may be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than what is illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

In order to facilitate the understanding of the embodiments of the present application, the system architecture applicable to the data transmission method in the present application is first introduced. As shown in FIG. 3, the base station 301, the first terminal device 302, and the second terminal device 303 form a system 300. In the system, the first terminal device 302 and the second terminal device 303 can send uplink data to the base station 301, and the base station 301 needs to receive the uplink data sent by the first terminal device 302 and the second terminal device 303, and the uplink is sent in some manner. Whether the data correctly receives feedback to the first terminal device 302 and the second terminal device 303. In addition, the first terminal device 302 and the second terminal device 303 can also form a system 200, in which the first terminal device 302 can send uplink data to the second terminal device 303, and the second terminal device 303 needs to receive the first The uplink data sent by the terminal device 302 is fed back to the first terminal device 302 by using the uplink data in a certain manner. In addition to the

systems

300 and 200 described above, the data transmission method in the present application can also be applied to other systems, as long as the entity in the system needs to send uplink data, another entity needs to receive uplink data, and the uplink data is sent through some transmission method. Whether it is correctly received for feedback.

It should be understood that the technical solution of the embodiment of the present application can also be applied to various communication systems, for example, a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, and a broadband. Wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) System, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system or fifth generation mobile communication The technology (5th-generation, 5G) and the like, it should be noted that the embodiment of the present application does not limit a specific communication system.

It should be understood that the terminal device in the embodiment of the present application includes, but is not limited to, a mobile station (MS), a user equipment (UE), a mobile terminal, a mobile telephone, and a mobile phone. And portable devices, etc., the terminal device can communicate with one or more core networks via a radio access network (RAN), for example, the terminal device can be a mobile phone (or "cellular" "Telephone", a computer with wireless communication function, etc., the terminal device can also be a portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile device.

It should be understood that the network device in the embodiment of the present application is an entity for transmitting or receiving a signal on the network side, and may be a base station or other device, where the base station may be a base transceiver station in GSM or CDMA. The BTS) may also be a base station (nodeB) in WCDMA, or may be an evolved base station (evolved node B, eNB or e-NodeB) in LTE, or a base station in 5G and subsequent evolved communication systems. The example is not limited.

The LTE system is taken as an example to introduce the scenario applicable to the embodiment of the present application.

The LTE can support the machine type communication (MTC). The receiving bandwidth of the terminal device applied to the MTC may be smaller than the system bandwidth. The bandwidth occupied by the physical downlink control channel (PDCCH) may be the entire system bandwidth. Therefore, the terminal device applied to the MTC may not be able to receive downlink control information (DCI) carried in the PDCCH. Therefore, in order to enable the terminal device applied to the MTC to correctly receive the DCI, the LTE system communicates through the machine type. The MTC physical downlink control channel (MPDCCH) carries the DCI.

In the existing MTC communication transmission mechanism, for the uplink data sent by the terminal device, the network device may send feedback information to the terminal device, where the feedback information is carried in the DCI, for example, DCI format 6-0A or DCI format 6-0B, the feedback The information is used to indicate whether the uplink data of the network device for the terminal device is correctly received. Specifically, a new data indicator (NDI) containing 1 bit in the DCI is used to indicate whether the uplink or downlink data of the DCI scheduling is “newly transmitted data” or “retransmit the last transmission of the process”. The data". Therefore, the acknowledgment (ACK) or the negative acknowledgment (NACK) of the network device for receiving the uplink data of the physical uplink shared channel (PUSCH) can pass the NDI bit in the DCI carried by the MPDCCH. to fulfill. The network device may send the DCI to the UE, if the NDI bit included is reversed compared with the NDI bit in the DCI sent by the base station in the current HARQ process, indicating that the last transmission has been correctly received, the UE needs to send a new one. Upstream data; if the NDI bit does not reverse, it means that the last time the transmission was not received correctly, the UE needs to resend the data sent by the current HARQ process. In addition, ACK and NACK may also be fed back in other manners, for example, using 1 bit of ACK/NACK indication information in DCI format 6-0A or DCI format 6-0B to indicate ACK or NACK, or using some special fields in the DCI. ACK/NACK feedback.

In the existing MTC communication transmission mechanism, the UE detects that the MPDCCH for scheduling PUSCH transmission can be searched in a UE-specific search space (USS). Similar to the repeated transmission of the PUSCH, the MPDCCH can also be repeatedly transmitted. The length of one MPDCCH without repeat transmission is one subframe, and the maximum number of repetitions of one MPDCCH is equal to the time domain length of one USS. In some aspects, the starting subframe of the USS is a subframe that satisfies the following formula:

Where mod represents the modulo operation,

Indicates that the x is rounded down, n _f ' is the radio frame number of the radio frame where the start subframe of the USS is located, and n _s ' is the time slot of the start subframe included in the radio frame. The slot number, T=r _max · G, r _{max is} the maximum number of repetitions of the MPDCCH, determined by the higher layer parameters, and the value of G is also determined by the higher layer parameter, α _offset '=0.

It should be noted that each radio frame includes 10 subframes, each subframe includes 2 slots, and the slot number in one radio frame ranges from 0 to 19. For a subframe in any one of the radio frames, if the radio frame number corresponding to the subframe and the slot number of the slot included in the subframe satisfy the above formula, the subframe may serve as the starting subframe of the USS.

r _max is the maximum number of repetitions of the MPDCCH, which can be understood as the maximum number of repeated transmissions of the MPDCCH in one search space. For all UEs in the same cell, the value of r _max is the same, that is, r _max is common to one cell. The value, its value can be 1, 2, 4, 8, 16, 32, 64, 128 or 256. It should be understood that, in some aspects, r _max may also be the maximum number of repetitions of other similar channels, and the value of r _max is not limited to the above several values.

The value of G is greater than or equal to 1. Specifically, for a frequency division duplexing (FDD) mode, the value of G may be 1, 1.5, 2, 2.5, 4, 5, 8, or 10 for time division duplexing (TDD). For the mode, the value of G can be 1, 2, 4, 5, 8, 10 or 20.

It can be seen that r _max and G are determined by high-level parameters in the above solution, that is, the network device is configured by radio resource control (RRC) signaling, which is a semi-static configuration scheme, if it is to adapt to dynamics. The number of repetitions of the changed PUSCH. In this scheme, the period and/or duration of the USS in the time domain can only be adjusted through RRC signaling. This semi-static configuration is less efficient and consumes more resources. Big.

Based on the foregoing scenario, the embodiment of the present application provides a data transmission method and related device, which are used to save resources. The following takes the USS where the MPDCCH is located as an example. The data transmission method in this application is first introduced. Referring to FIG. 4, an embodiment of the data transmission method in the embodiment of the present application includes:

401. The network device sends the first downlink control information to the terminal device.

When the network device schedules the UE to perform PUSCH transmission, it also indicates the number of repetitions of the PUSCH transmission. Specifically, the network device sends the first downlink control information to the terminal device, where the first downlink control information is used to schedule the first uplink. Data transmission, and includes information on the number of repetitions of the PUSCH.

The number of repetitions of the PUSCH is used to indicate the number of repetitions of the PUSCH, that is, the number of times the UE is repeatedly transmitted to transmit the first uplink data.

It should be understood that the network device configures a maximum number of repetitions of a PUSCH for the terminal device by using RRC signaling in advance, and the number of repetitions indicated in the downlink control information is less than or equal to the maximum number of repetitions, and for different terminal devices, the network device passes the downlink control. The number of repetitions of the information indication may be the same or different.

As an optional manner, the format of the first downlink control information in this application may be 6-0A (DCI format 6-0A) or 6-0B (DCI format 6-0B), where DCI format 6-0A is used for scheduling UEs with coverage enhancement mode A (CE Mode A), and DCI format 6-0B is used for scheduling UEs with coverage enhancement mode B (CE Mode B).

For the UE of the CE Mode A, the network device may indicate the number of repetitions of the secondary PUSCH of the UE by using the repetition number information of the 2-bit PUSCH in the first downlink control information, and the UE may pass the 3-bit for the UE of the CE Mode B. The repetition number information of the PUSCH indicates the number of repetitions of the secondary PUSCH of the UE, and the specific indication manners are as shown in Table 1 and Table 2 below. The repetition number information of the PUSCH may indicate a repetition level, and the repetition level corresponds to the number of repetitions of the PUSCH.

CE Mode A的UE对应的PUSCH的最大重复次数Maximum number of repetitions of PUSCH corresponding to the UE of CE Mode A	{n ₁,n ₂,n ₃,n ₄} {n ₁ ,n ₂ ,n ₃ ,n ₄ }
未配置Not configured	{1,2,4,8}{1,2,4,8}
1616	{1,4,8,16}{1,4,8,16}
3232	{1,4,16,32}{1,4,16,32}

Table 1

CE Mode B的UE对应的PUSCH的最大重复次数Maximum number of repetitions of the PUSCH corresponding to the UE of CE Mode B	{n ₁，n ₂，n ₃，n ₄，n ₅，n ₆，n ₇，n ₈} {n ₁ ,n ₂ ,n ₃ ,n ₄ ,n ₅ ,n ₆ ,n ₇ ,n ₈ }
未配置Not configured	{4，8，16，32，64，128，256，512}{4,8,16,32,64,128,256,512}
192192	{1，4，8，16，32，64，128，192}{1,4,8,16,32,64,128,192}
256256	{4，8，16，32，64，128，192，256}{4,8,16,32,64,128,192,256}
384384	{4，16，32，64，128，192，256，384}{4,16,32,64,128,192,256,384}
512512	{4,16,64，128，192，256，384,512}{4,16,64,128,192,256,384,512}
768768	{8,32,128，192，256，384,512,768}{8,32,128,192,256,384,512,768}
10241024	{4，8，16，64，128，256，512,1024}{4,8,16,64,128,256,512,1024}

Table 2

Taking CE Mode B as an example, if the maximum number of repetitions of the PUSCH configured by the network device for the UE is 1024, and the information of the 3-bit in the DCI format 6-0b (the number of repetitions of the PUSCH) is indicated as n ₅ , then Table 2 shows that The number of repetitions of this PUSCH is 128.

It should be noted that, in this embodiment, the PUSCH repetition number information is used by the terminal device to determine the first search space according to the repetition number information, in addition to indicating the number of repetitions of the PUSCH.

It should be noted that the repetition number information included in the first downlink control information may be the repetition number information of the PUSCH, and may be the repetition number information of other similar uplink channels. The description is made by way of example and does not constitute a limitation of the application.

402. The network device determines a first search space.

There is a relationship between the first search space and the number of repetitions of the PUSCH in the embodiment of the present application, that is, the first search space corresponds to the number of repetitions of the PUSCH. Specifically, the network device may determine the number of repetitions of the PUSCH according to the The number of repetitions of the PUSCH determines the first search space, and may be determined by the network device after determining the first search space, and then determining the number of repetitions of the PUSCH according to the first search space.

As an alternative manner, the first search space corresponding to the repetition number information of the PUSCH may be that the ratio of the number of repetitions indicated by the repetition number information to the ratio of r _max ·G corresponds to the first search space.

r _max is the maximum number of repetitions of the physical downlink control channel (PDCCH) that the network device configures for the UE through RRC signaling. The maximum number of repetitions of the PDCCH can be understood as the maximum number of times the PDCCH is repeatedly transmitted in the search space. The PDCCH may be an MPDCCH in the MTC scenario, or other similar downlink channels, which is not limited in this application.

G is a parameter configured by the network device through RRC signaling. Specifically, for the FDD mode, the value of G may be 1, 1.5, 2, 2.5, 4, 5, 8, 10 or other values. For the TDD mode, G The value may be 1, 2, 4, 5, 8, 10, 20 or other values, which is not limited in this application.

As an optional manner, the starting subframe of the first search space determined by the network device is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G,α _Offset =0, the above formula can also be equivalent to the following formula:

In the above formula (1), the specific value of β is determined by the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G, specifically by any of the following methods:

Manner 1: If the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is greater than or equal to the first threshold, β=1; if the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than the first threshold, then 0 <β<1.

Specifically, when the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than the first threshold, different target values may be set for different intervals in which the ratio is located: if the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G In the first interval [k ₁ , k ₀ ), β is equal to the first target value u ₁ , and if the ratio of the number of repetitions v of the PUSCH to r _max · G is in the second interval [k ₂ , k ₁ ), β is equal to The second target value u _{2 is} as follows:

It should be understood that the first threshold value and the target value corresponding to the different interval values are all preset, or may be configured to the terminal device through RRC signaling, and the specific value may be set according to the empirical value, or according to other methods. The setting is not limited in this application.

As shown in FIG. 5, FIG. 5 shows that k ₀ = 2 (ie, the first threshold is 2), k ₁ =1, k ₂ = 0.5, u ₁ = 0.5, and u ₂ = 0.25, the first search space An example: the maximum number of repetitions of the maximum MPDCCH configured by the network device through RRC signaling is 64 (ie, r _max =64), G=10, and if the number of repetitions of the PUSCH indicated by the repetition number information is 2048 (v=2048), since 2048/ (64*10)=3.2, that is, v/(G·r _max )≥k ₀ , then β=1, the first search space is as shown in FIG. 5; if the repetition number information indicates the number of PUSCH repetitions is 1024, (v = 1024), since 1024 / (64 * 10) = 1.6, that is, k ₁ ≤ v / (G · r _max ) < k ₀ , then β = 0.5, the first search space is shown in Figure 5; if the number of repetitions is indicated The PUSCH of the information is 512 (v=512). Since 512/(64*10)=0.8, that is, k ₂ ≤v/(G·r _max )<k ₁ , then β=0.25, the first search space is shown in FIG. 5 . Shown. As shown in FIG. 5, regardless of the number of repetitions indicated by the repetition number information, the repetition can be ended early and the UE is prevented from being blindly detected frequently, thereby saving resources.

Mode 2: If the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is greater than the first threshold, β=1; if the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than or equal to the first threshold, then 0 <β<1.

Specifically, when the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than the first threshold, different target values may be set for different intervals in which the ratio is located, which is similar to the process described in the above manner 1 No longer.

Manner 3: If the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than or equal to the second threshold, β=1; if the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is greater than or equal to the first threshold, Then β=1; if the ratio of the number of repetitions of the PUSCH to the ratio of r _max ·G is greater than the second threshold and less than the first threshold, then 0<β<1.

Specifically, when the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is greater than the second threshold and less than the first threshold, different target values may be set for different intervals in which the ratio is located, specifically in the manner 1 above. The process of description is similar and will not be repeated here. The method can prevent the terminal device from detecting the MPDCCH frequently when the number of repetitions of the PUSCH is too small (the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than the first threshold); and when the number of repetitions of the PUSCH is small, when the uplink of the PUSCH is used The frequency resource and the power consumption are both small, and even if the PUSCH is not fed back in advance, it will not cause significant waste of resources and energy, and can avoid increasing the overhead of blind detection MPDCCH of the terminal device.

Mode 4: If the number of repetitions of the PUSCH is less than or equal to the second threshold, β=1; if the ratio of the number of repetitions of the PUSCH to the ratio of r _max ·G is greater than or equal to the first threshold, β=1; if PUSCH If the number of repetitions is greater than the second threshold and the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than the first threshold, then 0 < β < 1.

Specifically, when the number of repetitions of the PUSCH is greater than the second threshold and the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than the first threshold, different target values may be set for different intervals in which the ratio is located, specifically The process described in the above mode 1 is similar, and will not be described again. The method can prevent the terminal equipment from detecting the MPDCCH frequently when the number of repetitions of the PUSCH is too small (the number of repetitions of the PUSCH is less than the first threshold); when the number of repetitions of the PUSCH is small, the uplink time-frequency resources and energy consumption occupied by the PUSCH are compared. Small, even if the PUSCH's early feedback is not performed, it will not cause obvious waste of resources and energy, and can avoid increasing the overhead of blind detection MPDCCH of the terminal device.

Manner 5: If the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is greater than or equal to the second threshold, β>1, if the ratio of the number of repetitions of the PUSCH to the ratio of r _max ·G is less than the second threshold and is greater than or If it is equal to the first threshold, then β=1. If the ratio of the number of repetitions of the PUSCH to the ratio of r _max ·G is less than the first threshold, then 0<β<1.

Specifically, when the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is greater than or equal to the second threshold, different target values may be set for the interval in which the ratio is located, which is similar to the process described in the above manner 1. I will not repeat them later. When the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than the first threshold, different target values may be set for different intervals in which the ratio is located, which is similar to the process described in the above manner 1 and will not be described again. . In this method, the value of β can be greater than 1, and the detection period of the MPDCCH can be adjusted more flexibly. When the number of repetitions of the PUSCH is large, the overhead of the blind detection MPDCCH of the terminal device can be further reduced.

It should be understood that, in addition to the above manners, the value of β may be determined by other means, which is not limited in this application.

As an optional manner, the starting subframe of the first search space determined by the network device may also be a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G,α The set of values corresponding to the _offset is determined by the ratio of the number of repetitions to the ratio of r _max · G, in any of the following ways:

Manner 1: If the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is greater than or equal to the first threshold, α _offset =0; if the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than the first threshold, then α _offset = {0, u ₁ , u ₂ ... u _n }, where _{n ≥} ₁ , 0 < u _i < 1, i is an integer greater than or equal to 1 and less than or equal to n.

Specifically, when α _offset =0, the above formula (2) can be equivalent to the following formula:

When α _offset = {0, u ₁ , u ₂ ... u _n }, it means that α of _set can take a plurality of values in the above formula (2), and the first search space includes each value corresponding to α _offset The search space, that is, the start subframe of the first search space includes a subframe that satisfies any one of the following n+1 formulas:

For the set of values corresponding to the α _offset , different sets of values may be set for different intervals in which the ratio is located: if the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is in the first interval [k ₁ , k ₀ ), Then α _offset = {0, u ₁ }, if the ratio of the number of repetitions v of the PUSCH to r _max · G is in the second interval [k ₂ , k ₁ ), then α _offset = {0, u ₁ , u ₂ , u ₃ }, as shown in the following formula:

It should be understood that the first threshold value and the value set corresponding to different interval values are preset, or may be configured to the terminal device through RRC signaling, and the specific value may be set according to an empirical value, or according to other Mode setting, specifically this application is not limited.

As shown in FIG. 6, FIG. 6 shows that k ₀ = 2 (ie, the first threshold is 2), k ₁ =1, k ₂ = 0.5, u ₁ = 0.5, u ₂ = 0.25, and u ₃ = 0.75. An example of the first search space: the maximum number of repetitions of the maximum MPDCCH configured by the network device through RRC signaling is 64 (ie, r _max =64), G=10, and if the number of repetitions of the PUSCH indicated by the repetition number information is 2048 (v=2048) ), since 2048/(64*10)=3.2, that is, v/(G·r _max ) ≥ k ₀ , α _offset =0, the first search space is as shown in FIG. 6; if the PUSCH repetition indicated by the repetition number information The number of times is 1024, (v = 1024), since 1024 / (64 * 10) = 1.6, that is, k ₁ ≤ v / (G · r _max ) < k ₀ , then α _offset = { ₀ , 0.5}, the first search The space is as shown in FIG. 6; if the PUSCH of the repetition number indication information is 512 (v=512), since 512/(64*10)=0.8, that is, k ₂ ≤v/(G·r _max )<k ₁ , then α _offset = {0, 0.5, 0.25, 0.75}, the first search space is shown in Figure 6. As shown in FIG. 6, regardless of the number of repetitions indicated by the repetition number information, the repetition can be ended early and the UE is prevented from being blindly detected frequently, thereby saving resources.

Manner 2: if the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is greater than the first threshold, α _offset =0; if the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than or equal to the first threshold, then α _ofset = {0, u ₁ , u ₂ ... u _n }, where _{n ≥} ₁ , 0 < u _i < 1, i is an integer greater than or equal to 1 and less than or equal to n.

Specifically, when the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is greater than or equal to the first threshold, different sets of values may be set for the interval in which the ratio is located, which is similar to the process described in the above manner 1 No longer.

Manner 3: If the number of repetitions of the PUSCH is less than the ratio of r _max · G is less than or equal to the second threshold, then

If the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is greater than or equal to the first threshold, β=1; if the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is greater than the second threshold and less than the first threshold Value, then

Wherein n≥1, 0<u _i <1, i is an integer greater than or equal to 1 and less than or equal to n.

Specifically, when the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is greater than or equal to the second threshold and less than the first threshold, different sets of values may be set for the interval in which the ratio is located, specifically in the manner described above. The process described in 1 is similar and will not be repeated here.

Mode 4: If the number of repetitions of the PUSCH is less than or equal to the second threshold, α _ofset =0; if the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is greater than or equal to the first threshold, α _ofset =0; If the number of repetitions of the PUSCH is greater than the second threshold and the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than the first threshold, α _offset = {0, u ₁ , u ₂ ... u _n }, where , n≥1, 0<u _i <1, i is an integer greater than or equal to 1 and less than or equal to n.

Specifically, when the number of repetitions of the PUSCH is greater than the second threshold and the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G is less than the first threshold, different sets of values may be set for the interval in which the ratio is located, specifically The process described in the above mode 1 is similar, and will not be described again.

It should be understood that, in addition to the above manners, the set of values corresponding to the α _offset may be determined by other methods, which is not limited in this application.

As an optional manner, the network device further determines the second search space before determining the first search space. Specifically, the starting subframe of the second search space is a subframe that satisfies the following formula:

Where n _f ' is the frame number of the radio frame in which the start subframe of the second search space is located, and n _s ' is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G , α _offset '=0.

In this embodiment, the first search space determined by the network device does not include a portion overlapping with the second search space in the time domain. Specifically, the network device may determine that all the starting subframes satisfy the target search space of the above formula (1) or formula (2), and then use the portion of the target search space and the second search space that does not overlap in the time domain as the first search. space.

It should be understood that the network device is also configured with a narrowband (NB) for detecting the search space, and one NB occupies six consecutive resource blocks (RBs). In this embodiment, the network device is configured as the NB of the first search space. The NB configured for the second search of the network device may be the same or different, and is not limited in this application.

403. The terminal device receives the first downlink control information that is sent by the network device.

After the network device sends the first downlink control information to the terminal device, the terminal device receives the first downlink control information, and the terminal device repeatedly transmits the first uplink data on the PUSCH according to the first downlink control information.

404. The terminal device determines, according to the repetition quantity information of the physical uplink shared channel, the first search space.

The terminal device determines the first search space when the first uplink data is repeatedly transmitted on the PUSCH, or before the first uplink data is transmitted, according to the repetition number of the PUSCH indicated by the repetition information of the PUSCH in the first downlink control information.

Specifically, the terminal device may determine the first search space according to the ratio of the number of repetitions of the PUSCH to the ratio of r _max ·G.

As an optional manner, the terminal device determines, according to the ratio of the number of repetitions of the PUSCH to the ratio of r _max · G, that the starting subframe of the first search space may be a subframe that satisfies the above formula (1), or satisfies the above formula. (2) Subframe.

In another optional manner, the terminal device further determines the second search space before determining the first search space. Specifically, the starting subframe of the second search space is a subframe that satisfies the above formula (3). In this embodiment, the first search space determined by the network device according to the ratio of the number of repetitions to the ratio r _max · G does not include a portion overlapping with the second search space in the time domain. Specifically, the terminal device may determine all the starting subframes. The target search space that satisfies the above formula (1) or formula (2) is used, and then the portion where the target search space and the second search space do not overlap in the time domain is taken as the first search space.

405. The network device sends the second downlink control information in the first search space.

After the network device determines the first search space, the second downlink control information is sent in the first search space, and the second downlink control information is used to feed back the first uplink data and/or schedule the second uplink data transmission.

It should be understood that, after receiving the first downlink control information, the terminal device repeatedly transmits the first uplink data on the PUSCH, and the network device sends the feedback information for the transmission to the terminal device, where the feedback information is carried in the downlink control information. In the second downlink control information, specifically, if the NDI bit included in the second DCI and the NDI included in the first DCI are reversed, it indicates that the first uplink data has been correctly received, and the UE needs to send new uplink data (the second uplink). Data); if the NDI bit does not reverse, it means that the previous transmission was not received correctly, and the UE needs to retransmit the first uplink data. In other embodiments, the second DCI may also include an ACK/NACK indication bit. For example, when the indication bit is “0”, it indicates that the first uplink data has been correctly received, and when the indication bit is “1”, Indicates that the first uplink data is not correctly received. Alternatively, the first uplink data may be fed back through an invalid state of some fields in the second DCI. For example, the second DCI format is DCI format 6-0A, and the DCI may pass the DCI. An invalid state of the resource allocation field in format 6-0A indicates that the first uplink data has been correctly received, and another invalid state indicates that the first uplink data was not correctly received.

It should be further understood that, in this embodiment, the format of the second downlink control information is the same as the first downlink control information, for example, the same as the DCI format 6-0A or the DCI format 6-0B. In other embodiments, The format of the second downlink control information may also be different from the first downlink control information, which is not limited in this application.

406. The terminal device detects second downlink control information in the first search space.

After the network device sends the second downlink control information, and the terminal device determines the first search space, the terminal device detects the second downlink control information in the determined first search space.

It should be understood that the sending, by the network device, the second downlink control information in the first search space refers to the second downlink control information carrying the first search space, and after the terminal device determines the first search space, the first search space may be in the first search space. Performing blind detection on the device, when the terminal device detects the second downlink control information, the terminal device retransmits the first downlink data according to the second downlink control information, or stops transmitting the first downlink data according to the second downlink control information, and Start transmitting the second downlink data. It should be understood that, in this embodiment, the terminal device may start blind detection before the network device sends the second downlink control information, or may start blind detection at the same time that the network device sends the second downlink control information.

It should be noted that, in the embodiment corresponding to FIG. 4, step 402 may be before step 401 or after step 401; after step 401 and step 402, step 403 and step 404 are indistinguishable. The order, that is, step 405 may be before step 403 and/or step 404, or may be after step 403 and/or step 404; the execution of step 406 is after step 403 and step 404, and step 405 does not distinguish the order, step 406 This may occur before step 405 or simultaneously with step 405.

It should be noted that, in the embodiment of the present application, after the terminal device establishes an RRC connection with the network device, or after the terminal device sends the scheduling request, the terminal device receives the scheduled uplink data transmission for the first time. Before the downlink control information, the terminal device does not know the repetition number information of the PUSCH. In this case, the terminal device can detect the downlink control information by using the search space configured by the RRC signaling, that is, the search space is determined by using the above formula (3). Or the terminal device may determine the search space by using the maximum number of repetitions of the PUSCH configured by the RRC signaling, which is similar to the method for determining the search space of the search space according to the number of repetitions of the PUSCH indicated by the repetition number information of the PUSCH. .

In the embodiment of the present application, after receiving the first DCI sent by the network device, the terminal device determines the first search space according to the repetition quantity information of the physical uplink shared channel in the first DCI, and then in the first search space Two DCIs are tested. That is, the terminal device in the present application may determine the search space according to the repetition number information of the uplink channel, that is, the search space in the present application may change according to the dynamic change of the PUSCH repetition number information, that is, the network device may dynamically configure the search space to adapt to the repetition. The dynamic change of the number of times, so that when the number of repetitions of the PUSCH is relatively small, the repetition can be ended in advance to avoid waste of resources; when the number of repetitions is relatively large, the UE can avoid frequent blind detection and save resources.

Secondly, the embodiment of the present application provides various ways to determine the first search space, which improves the flexibility of the solution.

The present application further provides another data transmission method. Referring to FIG. 7, another embodiment of the data transmission method in the embodiment of the present application includes:

701. The network device sends the first downlink control information to the terminal device.

When the network device schedules the UE to perform PUSCH transmission, it also indicates the number of repetitions of the PUSCH transmission. Specifically, the network device sends the first downlink control information to the terminal device, where the first downlink control information is used to schedule the first uplink. Data transmission and includes search space indication information.

The search space indication information is used by the terminal device to determine the first search space according to the search space indication information. Specifically, the network device may notify the terminal device by using the RRC signaling to determine the first search space according to the search space indication information, and when the terminal device receives the downlink control information including the search space indication information, the terminal device performs the search according to the search. The space indication information determines the first search space.

It should be understood that, in this embodiment, the first downlink control information may include the search space indication information, and may further include a repetition quantity information of the PUSCH, where the repetition quantity information of the PUSCH is used to indicate the number of repetitions of the PUSCH, that is, to indicate The number of times the UE repeatedly transmits the first uplink data on the PUSCH.

Specifically, the format of the first downlink control information may be 6-0A (DCI format 6-0A) or 6-0B (DCI format 6-0B), where DCI format 6-0A is used to schedule coverage enhancement mode. The UE of the A (coverage enhancement mode A, CE Mode A), the DCI format 6-0B is used to schedule the UE of the coverage enhancement mode B (CE Mode B).

For the UE of the CE Mode A, the network device may indicate the number of repetitions of the secondary PUSCH of the UE by using the repetition number information of the 2-bit PUSCH in the first downlink control information, and the UE may pass the 3-bit for the UE of the CE Mode B. The repetition number information of the PUSCH indicates the number of repetitions of the PUSCH of the UE. The specific indication manner may be as shown in Table 1 and Table 2 above, and details are not described herein again.

702. The network device determines a first search space.

There is an association relationship between the first search space and the search space indication information in the embodiment of the present application, that is, the first search space corresponds to the search space indication information, and the network device may, according to the search space indication information, before determining the search space indication information. The indicated content determines the first search space, and the search space indication information is determined according to the first search space after the first search space is determined, which is not limited in the application.

The following describes some of the indication information and the corresponding first search space.

As an optional manner, the network device configures a plurality of search spaces in advance through RRC signaling, and the network device determines, from the plurality of search spaces, one search space as the first search space, and correspondingly, the search space indication information indicates the terminal device. A search space is determined from the plurality of search spaces configured by the RRC signaling as the first search space.

Specifically, in this implementation manner, the starting subframe of multiple search spaces configured by the network device through RRC signaling may be a subframe that satisfies the following formula:

Where n _f ' is the frame number of the radio frame in which the starting subframe of the search space is located, and n _s ' is the slot number of the slot included in the starting subframe in the radio frame, T=r _max ·G, which The period corresponding to the plurality of search spaces (that is, the product of the configured r _max parameter and the G parameter) and/or the set of values of the α _offset are different. Further, the NBs corresponding to the plurality of search spaces may be the same or different. The specific application is not limited.

As an optional manner, the network device configures a plurality of search spaces in advance through RRC signaling, and the network device determines, from the multiple search spaces, one or more search spaces as the first search space, and correspondingly, the search space indication information. The terminal device is instructed to determine at least one search space from the plurality of search spaces configured by the RRC signaling as the first search space.

It should be noted that, when the search space indication information indicates that the terminal device determines the plurality of search spaces as the first search space, the first search space is a search space formed by combining a plurality of search spaces indicated by the search space indication information, that is, the first search space. The time domain location corresponding to a search space is obtained by superimposing the time domain location corresponding to each of the plurality of search spaces indicated by the search space indication information, and the frequency domain location of the first search space at a certain time is The frequency domain position corresponding to at least one of the plurality of search spaces corresponding to the time is determined.

It should be noted that, in this implementation manner, the NBs corresponding to the multiple search spaces configured by the network device through the RRC signaling may be the same or different, and are not limited in this application.

As an optional manner, the network device determines the search space parameter value according to the service requirement or other factors, and determines the first search space according to the search space parameter value. Correspondingly, the search space indication information is used to indicate the search space parameter value.

The search space parameter value may be a parameter value indicating a period corresponding to the search space and/or a parameter value indicating a relative position of the start subframe of the search space in the corresponding period.

It should be noted that, in some embodiments, the network device further configures, by using RRC signaling, a parameter value of a period corresponding to the search space and/or a parameter value indicating a relative position of the start subframe of the search space in the corresponding period, For the terminal device, the search device parameter value indicated by the search space information by the network device has a higher priority than the search space parameter value configured by the network device through RRC signaling, that is, for the same search space parameter, if configured in the RRC signaling The value of the parameter is also indicated in the search space indication information, and the terminal device determines the first search space by searching for the value of the parameter indicated by the space indication information.

Specifically, the network device may indicate the first search space (determining the first search space) by:

The indication mode 1: the search space indication information is used to indicate the value of the first parameter G (G is equal to the target value), and the starting subframe of the first search space determined by the network device is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe of the first search space in the radio frame, T=r _Max · G, G is equal to the target value, r _max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, and α _offset =0.

Optionally, in this embodiment, the search space indication information may be a 3-bit indication information. For the FDD system, the value of G indicated by the indication information may be 1, 1.5, 2, 2.5, 4, 5, A value of 8, 10 may be other values, which is not limited in this embodiment. For the TDD system, the value of G indicated by the indication information may be 1, 2, 4, 5, 8, 10, 20 One may be other values, which is not limited in this embodiment. The network device may notify the terminal device of the value of the G indicated by the different content in the indication information by using the RRC signaling. Taking the FDD system as an example, the value of G indicated by the different content corresponding to the indication information is as follows:

指示信息I _value Instruction information I _value	GG
00	11
11	1.51.5
22	22
33	2.52.5
44	44
55	55
66	88
77	1010

table 3

After the terminal device parses the search space indication information, the table is queried to find the value of G corresponding to the search space indication information.

For the TDD system, the network device can also use a similar method to notify the terminal device of the value of G indicated by the different content in the indication information. In some TDD system scenarios, the value of G is only 7 types, and the 3-bit indication information can be indicated at most. There are 8 states, so there will be a more reserved state that is not used.

Instructing mode 2: the search space indication information is used to indicate a set of values of the second parameter α _offset (as a target set), and correspondingly, the first search space determined by the network device includes a search space corresponding to each value in the target set, The starting subframe of the search space corresponding to each value is a subframe that satisfies the following formula:

Where n _{f is} the frame number of the radio frame in which the starting subframe of the search space is located, and n _s is the slot number of the slot included in the starting subframe of the search space in the radio frame, T=r _max · G, G is a parameter configured by RRC signaling, G is greater than or equal to 1, and r _max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling.

Optionally, in this embodiment, the network device may notify the terminal device to search for the value set of the α _offset indicated by the different content in the space indication information by using the RRC signaling, where the terminal device may parse the terminal device in the form of a table. After the space indication information is searched, the value set of the α _offset corresponding to the search space indication information is determined by the query table as a target set.

Instructing mode 3: The search space indication information is used to indicate the value of the third parameter r _max (equal to the target value). Correspondingly, the starting subframe of the first search space determined by the network device is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe of the first search space in the radio frame, T=r _Max · G, G is a parameter configured by RRC signaling, G is greater than or equal to 1, r _max is equal to the target value, and α _offset =0.

Optionally, in this embodiment, the network device may notify the terminal device to search for the value of the r _max indicated by the different content in the space indication information by using the RRC signaling, and the terminal device may parse the search in the form of a table. After the space indication information, the value of r _max corresponding to the search space indication information is determined by the query table as the target value.

Instructing mode 4: the search space indication information is used to indicate the value of the first parameter G (equal to the target value) and the value set of the second parameter α _offset (for the target set), correspondingly, the first search space determined by the network device The search space corresponding to each value in the target set is included, and the starting subframe of the search space corresponding to each value is a subframe that satisfies the following formula:

Where n _{f is} the frame number of the radio frame in which the starting subframe of the search space is located, and n _s is the slot number of the slot included in the starting subframe of the search space in the radio frame, T=r _max · G, G is equal to the target value, and r _max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling.

It should be noted that, in this embodiment, the network device may jointly search for the search space indication information that is used to jointly encode the information indicating the value of the G and the information indicating the value set of the α _offset , and may also indicate the value of the G. The information and the information indicating the set of values of the alpha _offset are respectively carried in the two search space indication information, which is not limited in this application.

Specifically, the network device may notify the terminal device to search for the value of G and the value set of the α _offset indicated by the different content in the space indication information by using the RRC signaling, and specifically, in the form of a table, the terminal device parses the search space. After the indication information, the value of the G corresponding to the search space indication information is determined by the query table as the target value and the value set of the α _offset is the target set.

Instructing mode 5: the search space indication information is used to indicate the value of the first parameter G (equal to the first target value) and the value of the third parameter r _max (equal to the second target value), correspondingly, the network device determines the The starting subframe of a search space is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe of the first search space in the radio frame, T=r _Max · G, G is equal to the first target value, r _max is equal to the second target value, and α _offset =0.

It should be noted that, in this embodiment, the network device may jointly search the information indicating the value of G and the information indicating the value of r _max to obtain the search space indication information, and may also indicate the value of G. The information and the information indicating the value of r _max are respectively carried in the two search space indication information, which is not limited in this application.

Specifically, the network device may notify the terminal device to search for the value of the G and the value of the r _max indicated by the different content in the space indication information by using the RRC signaling, where the terminal device parses the search space indication. After the information, the value of G corresponding to the search space indication information is determined by the query table as the first target value and the value of r _max is the second target value.

Instructing mode 6: the search space indication information is used to indicate a value set of the second parameter α _offset (which is a target set) and a value of the third parameter r _max (equal to the target value), and correspondingly, the first search determined by the network device The space includes a search space corresponding to each value in the target set, and the starting subframe of the search space corresponding to each value is a subframe that satisfies the following formula:

Where n _{f is} the frame number of the radio frame in which the starting subframe of the search space is located, and n _s is the slot number of the slot included in the starting subframe of the search space in the radio frame, T=r _max · G, G is a parameter configured by RRC signaling, G is greater than or equal to 1, and r _max is equal to the target value.

It should be noted that, in this embodiment, the network device may jointly encode the information indicating the value set of the α _offset and the information indicating the value of the r _max , and may also indicate the α _offset . The information of the value set and the information indicating the value of r _max are respectively carried in the two search space indication information, which is not limited in this application.

Specifically, the network device may notify the terminal device to search for the value set of the alpha _{offset and} the value of the r _max indicated by the different content in the space indication information by using the RRC signaling, and the terminal device may parse the search in the form of a table. After the space indication information, the value set of the α _offset corresponding to the search space indication information is determined by the query table as the target set and the value of r _max is the target value.

Instructing mode 7: the search space indication information is used to indicate the value of the first parameter G (equal to the first target value), the value set of the second parameter α _offset (which is the target set), and the value of the third parameter r _max Correspondingly, the first search space determined by the network device includes a search space corresponding to each value in the target set, and the starting subframe of the search space corresponding to each value is a formula that satisfies the following formula Subframe:

Where n _{f is} the frame number of the radio frame in which the starting subframe of the search space is located, and n _s is the slot number of the slot included in the starting subframe of the search space in the radio frame, T=r _max · G, G is equal to the first target value, and r _max is equal to the second target value.

It should be noted that, in this embodiment, the network device may perform, for information indicating the value of the G, the information indicating the value set of the alpha _offset and the information indicating the value of the r _max jointly obtained by searching the space indication information. The network device may also jointly encode the information indicating the value of G, the information indicating the set of values of α _offset and the information indicating the value of r _max to obtain a search space indication information, and then Another information is carried in another search space indication information; the network device may further carry information indicating the value of G, information indicating the value set of α _offset , and information indicating the value of r _max in three searches respectively. In the space indication information, the specific application is not limited.

Specifically, the network device may notify the terminal device by using the RRC signaling to search for the value of G indicated by the different content in the space indication information, the value set of the alpha _offset , and the value of the r _max , which may be in the form of a table. After the terminal device parses the search space indication information, the value of the G corresponding to the search space indication information is determined by the query table as the first target value, the value set of the α _offset is the target set, and the value of r _max is the second value. Target value.

703. The terminal device receives the first downlink control information that is sent by the network device.

After the network device sends the first downlink control information to the terminal device, the terminal device receives the first downlink control information, where the first downlink control information is used to schedule the first uplink data transmission, and the terminal device controls the first downlink control according to the first downlink control information. The information transmits the first uplink data.

704. The terminal device determines the first search space according to the search space indication information.

After receiving the first downlink control information, the terminal device determines the first search space according to the search space indication information in the first downlink control information.

In an optional manner, the terminal device determines, according to the search space indication information, that one of the plurality of search spaces is the first search space.

Specifically, the terminal device may first determine, according to the RRC signaling, a plurality of search spaces configured by the network device, and search space indication information corresponding to each search space, and after the terminal device obtains the search space indication information, determine the search space indication information. The corresponding search space is the first search space. After acquiring the search space indication information, the terminal device may further determine, according to the RRC signaling, multiple search spaces configured by the network device, and search space indication information corresponding to each search space, and then multiple search spaces configured from the RRC signaling. The search space corresponding to the search space indication information is determined to be the first search space.

In an optional manner, the terminal device determines, according to the search space indication information, that the at least one search space of the multiple search spaces is the first search space.

Specifically, the terminal device may first determine one or more search spaces corresponding to the different search space indication information according to the RRC signaling, and after the terminal device obtains the search space indication information, determine a search space corresponding to the search space indication information as The first search space, or a plurality of search spaces corresponding to the search space indication information are combined to obtain a first search space.

After the terminal device obtains the search space indication information, the terminal device may further determine one or more search spaces corresponding to the search space indication information according to the RRC signaling, and if the search space indication information corresponds to one search space, determine the The search space is a first search space. If the search space indication information corresponds to multiple search spaces, the multiple search spaces are combined to obtain a first search space.

As an optional manner, the terminal device determines the search space parameter value according to the search space indication information, and determines the first search space according to the search space parameter value. Specifically, the search space parameter value may be a period indicating the search space. The parameter value (eg, the first parameter G and/or the third parameter r _max ) and/or a parameter value (eg, the second parameter α _offset ) indicating the relative position of the starting subframe of the search space in the corresponding period.

It should be understood that the network device may configure the search space parameter value corresponding to the different search space indication information by using the RRC signaling, and the terminal device may determine the search space corresponding to the search space indication information by using RRC signaling after acquiring the search space indication information. For the parameter value, the terminal device may first determine the search space parameter value corresponding to each search space indication information by using RRC signaling, and after obtaining the search space indication information, determine the search space parameter value corresponding to the search space indication information.

Specifically, the terminal device determines, according to the search space indication information, that G is equal to the target value, and then determines that the starting subframe of the first search space is a subframe that satisfies the following formula:

Alternatively, the terminal device determines, according to the search space indication information, a set of values corresponding to the α _offset as a target set, and then determines a search space corresponding to each value in the target set, and the search space obtained by superimposing the search spaces is the first search. Space, where the starting subframe of the search space corresponding to each value in the target set is a subframe that satisfies the following formula:

Alternatively, the terminal device determines, according to the search space indication information, that r _max is equal to the target value, and then determines that the starting subframe of the first search space is a subframe that satisfies the following formula:

Alternatively, the terminal device determines, according to the search space indication information, G is equal to the target value, and the set of values corresponding to the α _offset is the target set, and then determines the search space corresponding to each value in the target set, and the search space obtained by superimposing the search spaces That is, the first search space, where the starting subframe of the search space corresponding to each value in the target set is a subframe that satisfies the following formula:

Alternatively, the terminal device determines, according to the search space indication information, that G is equal to the first target value, r _max is equal to the second target value, and then determines that the starting subframe of the first search space is a subframe that satisfies the following formula:

Alternatively, the terminal device determines, according to the search space indication information, r _max is equal to the target value, and the set of values corresponding to the α _offset is the target set, and the terminal device determines the search space corresponding to each value in the target set, and the search obtained by superimposing the search spaces The space is the first search space, where the starting subframe of the search space corresponding to each value is a subframe that satisfies the following formula:

Alternatively, the terminal device determines that G is equal to the first target value according to the search space indication information, the value set corresponding to the α _offset is the target set, and the value of r _max is the second target value, and the terminal device determines that each value in the target set corresponds to the value. The search space obtained by superimposing these search spaces is the first search space, wherein the starting subframe of the search space corresponding to each value is a subframe satisfying the following formula:

705. The network device sends the second downlink control information in the first search space.

It should be understood that, after receiving the first downlink control information, the terminal device starts to transmit the first uplink data, and the network device sends the feedback information for the transmission to the terminal device, where the feedback information is carried in the downlink control information. In the control information, specifically, if the NDI bit included in the second DCI and the NDI included in the first DCI are reversed, it indicates that the first uplink data has been correctly received, and the UE needs to send new uplink data (second uplink data). If the NDI bit does not reverse, it means that the previous transmission was not received correctly, and the UE needs to resend the first uplink data. Alternatively, the second DCI may also include an ACK/NACK indication bit. For example, when the indication bit is “0”, the first uplink data has been correctly received, and when the indication bit is “1”, the first uplink is indicated. The data is not received correctly; or the first uplink data may be fed back through the invalid state of some fields in the second DCI. For example, if the second DCI format is DCI format 6-0A, the DCI format 6-0A may be adopted. An invalid state of the resource allocation field indicates that the first uplink data has been correctly received, and another invalid state indicates that the first uplink data was not correctly received.

It should also be understood that, in this embodiment, the format of the second downlink control information is the same as the first downlink control information, for example, both DCI format 6-0A or DCI format 6-0B; in other embodiments, the second downlink The format of the control information may also be different from the first downlink control information, which is not limited in this application.

706. The terminal device detects second downlink control information in the first search space.

It should be understood that the sending, by the network device, the second downlink control information in the first search space refers to the second downlink control information carrying the first search space, and after the terminal device determines the first search space, the first search space may be in the first search space. The terminal device performs blind detection. When the terminal device detects the second downlink control information, the terminal device retransmits the first downlink data according to the second downlink control information, or starts to transmit the second downlink data according to the second downlink control information. It should be understood that, in this embodiment, the terminal device may start blind detection before the network device sends the second downlink control information, or may start blind detection at the same time that the network device sends the second downlink control information.

It should be noted that, in the foregoing embodiment corresponding to FIG. 7, step 702 may be before step 701 or after step 701; after step 701 and step 702, step 705 and step 704 are indistinguishable from step 703 and step 704. The order, that is, step 705 may be before step 703 and/or step 704, or may be after step 703 and/or step 704; the execution of step 706 is after step 703 and step 704, and step 705 does not distinguish the order, step 706 This may occur before step 705 or simultaneously with step 705.

It should be noted that, in the embodiment of the present application, after the terminal device establishes an RRC connection with the network device, the terminal device obtains the downlink control information for scheduling the uplink data transmission for the first time before the terminal device receives the downlink control information for scheduling the uplink data transmission. The information about the number of repetitions of the PUSCH is not known. In this case, the terminal device may detect the downlink control information by using the search space configured by the RRC signaling, that is, determine the search space by using the above formula (3), or the terminal device may configure the RRC signaling. The maximum number of repetitions of the PUSCH determines the search space, and is similar to the manner in which the search space of the search space is determined according to the number of repetitions of the PUSCH indicated by the repetition number information of the PUSCH, and details are not described herein again.

In the embodiment of the present application, after receiving the first DCI sent by the network device, the terminal device determines the first search space according to the search space indication information in the first DCI, and then detects the second DCI in the first search space. . That is, the network device in the present application can dynamically indicate the search space, so that the dynamic change of the repetition number information can be adapted. When the number of repetitions of the PUSCH is relatively small, the repetition is terminated in advance to avoid waste of resources; when the number of repetitions is relatively large, the avoidance is avoided. The UE frequently detects blindly and saves resources.

The data transmission method in the present application is described above. The following describes the communication device in the present application. Referring to FIG. 8, an embodiment of the communication device in the embodiment of the present application includes:

The receiving module 801 is configured to receive the first downlink control information that is sent by the network device, where the first downlink control information is used to schedule the first uplink data transmission, where the first downlink control information includes the repetition quantity information of the physical uplink shared channel.

The processing module 802 is configured to determine, according to the repetition quantity information of the physical uplink shared channel, the first search space;

The receiving module 801 is further configured to detect the second downlink control information in the first search space, where the second downlink control information is used to feed back the first uplink data and/or schedule the second uplink data transmission.

As an optional manner, in this embodiment, the repetition quantity information of the physical uplink shared channel indicates the repetition quantity of the physical uplink shared channel;

The processing module 802 is specifically configured to determine, according to a ratio of the number of repetitions of the physical uplink shared channel and the ratio of r _max · G, the first search space, where r _max is the maximum number of repetitions of the physical downlink control channel configured by the RRC signaling , G is a parameter configured by RRC signaling, and G is greater than or equal to 1.

As an optional manner, in this embodiment, the starting subframe of the first search space is a subframe that satisfies the following formula:

If the ratio of the number of repetitions of the physical uplink shared channel to r _max · G is greater than or equal to the first threshold, β=1; if the ratio of the number of repetitions of the physical uplink shared channel to r _max · G is less than the first threshold, 0<β<1.

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G ;

If the ratio of the number of repetitions of the physical uplink shared channel to r _max · G is greater than or equal to the first threshold, α _offset =0; if the ratio of the number of repetitions of the physical uplink shared channel to r _max · G is less than the first threshold , α _offset = {0, u ₁ , u ₂ ... u _n }, where _{n ≥} ₁ , 0 < u _i < 1, i is an integer greater than or equal to 1 and less than or equal to n.

As an optional manner, in this embodiment, the first search space does not include a portion overlapping with the second search space in the time domain, and the start subframe of the second search space is satisfied.

a subframe, where n _f ' is the frame number of the radio frame in which the start subframe of the second search space is located, and n _s ' is the slot number of the slot included in the start subframe in the radio frame, T= r _max · G, r _max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, G is a parameter of RRC signaling configuration, G is greater than or equal to 1, and α _offset '=0.

It should be understood that the process performed by the respective modules in the communication device in the foregoing FIG. 8 is similar to the process performed by the terminal device in the foregoing method embodiment in FIG. 4, and details are not described herein again.

In the embodiment of the present application, after the receiving module 801 receives the first DCI sent by the network device, the processing module 802 determines the first search space according to the repetition quantity information of the physical uplink shared channel in the first DCI, and then the receiving module 801 is in the The second DCI is detected in the first search space. That is, the communication device in the present application may determine the search space according to the repetition number information of the uplink channel, that is, the search space in the present application may change according to the dynamic change of the repetition number information, that is, the network device may dynamically configure the search space to adapt to the repetition number information. The dynamic change, so that when the number of repetitions of the PUSCH is relatively small, the repetition can be ended in advance to avoid waste of resources; when the number of repetitions is relatively large, the UE can avoid frequent blind detection and save resources.

Secondly, the present application provides various ways to determine the first search space, which improves the flexibility of the solution.

Referring to FIG. 9, another embodiment of a communication device in this embodiment of the present application includes:

The receiving module 901 is configured to receive first downlink control information that is sent by the network device, where the first downlink control information is used to schedule the first uplink data transmission, where the first downlink control information includes search space indication information, and the search space indication information is used. Determining the first search space;

The processing module 902 is configured to determine, according to the search space indication information, the first search space;

The receiving module 901 is further configured to detect second downlink control information in the first search space, where the second downlink control information is used to feed back the first uplink data and/or schedule the second uplink data transmission.

As an optional manner, the processing module 902 is specifically configured to determine, according to the search space indication information, that one of the plurality of search spaces is the first search space, where the multiple search spaces are determined by the communication device according to the RRC signaling. of.

As an optional manner, the processing module 902 is specifically configured to determine, according to the search space indication information, at least one search space in the plurality of search spaces, where the first search space is a search space in which at least one search space is combined, where A plurality of search spaces are determined by the user equipment according to RRC signaling.

As an optional manner, the processing module 902 is specifically configured to determine a value of the first parameter G according to the search space indication information, and determine, according to the value of the first parameter G, a first search space, a start subframe of the first search space. Subframes that satisfy the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G,r _Max is the number of repetitions of the maximum physical downlink control channel configured for RRC signaling, α _offset =0;

or,

The processing module 902 is specifically configured to determine a value set of the second parameter α _offset according to the search space indication information, and determine a first search space according to the value set, where the first search space includes a value corresponding to each value in the value set. The search space, the starting subframe of the search space corresponding to each value satisfies the following formula:

Where n _f is the frame number of the radio frame in which the starting subframe is located, and n _s is the slot number of the slot included in the starting subframe in the radio frame, T=r _max ·G, r _max is RRC signaling The number of repetitions of the configured maximum physical downlink control channel, G is a parameter configured by RRC signaling, and G is greater than or equal to 1;

or,

The processing module 902 is specifically configured to: determine, by the search space indication information, a value of the first parameter G and a value set of the second parameter α _offset , and according to the value of the G and the first search space determined by the set of values, the first search space includes: The search space corresponding to each value in the value set, the starting subframe of the search space corresponding to each value satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the second search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G,r _Max is the number of repetitions of the maximum physical downlink control channel configured for RRC signaling.

or,

The processing module 902 is specifically configured to determine a value of the third parameter r _max according to the search space indication information, and determine a first search space according to the value of r _max , where the starting subframe of the first search space is a subframe that satisfies the following formula:

or,

The processing module 902 is specifically configured to determine the value of the first parameter G and the value of the third parameter r _max according to the search space indication information, and then determine the first search space according to the value of G and the value of r _max , the start of the first search space. A subframe is a subframe that satisfies the following formula:

or,

The processing module 902 is specifically configured to determine a value set of the second parameter α _{offset and} a value of the third parameter r _max according to the search space indication information, and determine the first search space according to the value set of the α _{offset and} the value of the r _max , A search space includes a search space corresponding to each value in the set of values of the alpha _offset , and the starting subframe of the search space corresponding to each value is a subframe that satisfies the following formula:

or,

The processing module 902 is specifically configured to determine, according to the search space indication information, that the first search space is: the communication device determines the value of the first parameter G according to the search space indication information, and the value set of the second parameter α _offset and the third parameter r The value of _max is further determined according to the value of G, the value set of α _{offset and} the value of r _max , and the first search space includes a search space corresponding to each value in the set of values of α _offset , each The starting subframe of the search space corresponding to the value is a subframe that satisfies the following formula:

It should be understood that the process performed by the respective modules in the communication device in the foregoing FIG. 9 is similar to the process performed by the terminal device in the foregoing method embodiment corresponding to FIG. 7, and details are not described herein again.

In the embodiment of the present application, after the receiving module 901 receives the first DCI sent by the network device, the processing module 902 determines the first search space according to the search space indication information in the first DCI, and then the receiving module 901 is in the first search space. The second DCI is detected. That is, the network device in the present application can dynamically indicate the search space, so that the dynamic change of the repetition number information can be adapted. When the number of repetitions of the PUSCH is relatively small, the repetition is terminated in advance to avoid waste of resources; when the number of repetitions is relatively large, the avoidance is avoided. The UE frequently detects blindly and saves resources.

The following describes the network device in the embodiment of the present application. Referring to FIG. 10, an embodiment of the network device in the embodiment of the present application includes:

The sending module 1001 is configured to send the first downlink control information to the terminal device, where the first downlink control information is used to schedule the first uplink data transmission, where the first downlink control information includes the repetition quantity information of the physical uplink shared channel;

The processing module 1002 is configured to determine a first search space, where the first search space corresponds to the repetition quantity information of the physical uplink shared channel;

The sending module 1001 is further configured to send the second downlink control information in the first search space, where the second downlink control information is used to feed back the first uplink data and/or schedule the second uplink data transmission.

As an optional manner, the repetition quantity information of the physical uplink shared channel indicates the repetition quantity of the physical uplink shared channel;

The first search space corresponds to the repetition number information of the physical uplink shared channel, and includes:

The ratio of the number of repetitions to the ratio of r _max ·G corresponds to the first search space; wherein r _max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, and G is a parameter configured by RRC signaling, and G is greater than or equal to 1.

As an optional manner, the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the start subframe of the first search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G;

If the ratio of the number of repetitions of the physical uplink shared channel to r _max · G is greater than or equal to the first threshold, α _offset =0; if the ratio of the number of repetitions of the physical uplink shared channel to r _max · G is less than the first threshold , α _offset = {0, u ¹ , u ² ... u _n }, where _{n ≥} ¹ , 0 < u _i < 1, i is an integer greater than or equal to 1 and less than or equal to n.

As an optional manner, the first search space does not include a portion overlapping with the second search space in the time domain, and the start subframe of the second search space is satisfied.

It should be understood that the process performed by the network module in the foregoing FIG. 10 is similar to the process performed by the network device in the foregoing method embodiment of the method in FIG. 4, and details are not described herein again.

In the embodiment of the present application, the search space may change dynamically as the number of repetitions information dynamically changes, that is, the network device may dynamically configure the search space to adapt to the dynamic change of the repetition number information, so that when the number of repetitions of the PUSCH is relatively small, the network may be terminated early. Repeat to avoid waste of resources; when the number of repetitions is relatively large, the UE can avoid frequent blind detection and save resources.

Referring to FIG. 11, another embodiment of a network device in this embodiment of the present application includes:

The sending module 1101 is configured to send first downlink control information to the terminal device, where the first downlink control information is used to schedule the first uplink data transmission;

The processing module 1102 is configured to determine a first search space;

The sending module 1101 is further configured to send the second downlink control information in the first search space, where the second downlink control information is used to feed back the first uplink data and/or schedule the second uplink data transmission;

The first downlink control information includes search space indication information, and the search space indication information is used by the terminal device to determine the first search space according to the search space indication information.

As an optional manner, the search space indication information indicates that the terminal device determines one search space from the plurality of search spaces as the first search space, where the multiple search spaces are multiple search spaces configured by the network device through RRC signaling. .

In an optional manner, the search space indication information instructs the terminal device to determine at least one search space from the plurality of search spaces, where the first search space is a search space in which at least one search space is combined, where the multiple search spaces are A plurality of search spaces configured by the network device through RRC signaling.

As an optional manner, the search space indication information is used to indicate the value of the first parameter G;

The starting subframe of the first search space is a subframe that satisfies the following formula:

Where n _f is the frame number of the radio frame in which the starting subframe is located, and n _s is the slot number of the slot included in the starting subframe in the radio frame, T=r _max ·G, r _max is RRC signaling The number of repetitions of the configured maximum physical downlink control channel, α _offset =0;

or,

The search space indication information is used to indicate a set of values of the second parameter α _offset ;

The first search space includes a search space corresponding to each value in the set of values, and the starting subframe of the search space corresponding to each value satisfies the following formula:

or,

The search space indication information is used to indicate a value of the first parameter G and a set of values of the second parameter α _offset ;

Where n _f is the frame number of the radio frame in which the start subframe of the second search space is located, and n _s is the slot number of the slot included in the start subframe in the radio frame, T=r _max ·G,r _Max is the number of repetitions of the maximum physical downlink control channel configured for RRC signaling;

or,

The search space indication information is used to indicate the value of the third parameter r _max , and the starting subframe of the first search space is a subframe that satisfies the following formula:

or,

The search space indication information is used to indicate the value of the first parameter G and the value of the third parameter r _max , and the starting subframe of the first search space is a subframe that satisfies the following formula:

or,

The search space indication information is used to indicate a value set of the second parameter α _{offset and} a value of the third parameter r _max , where the first search space includes a search space corresponding to each value in the value set of the α _offset , and each value is used. The starting subframe of the corresponding search space is a subframe that satisfies the following formula:

or,

The search space indication information is used to indicate the value of the first parameter G, the value set of the second parameter α _{offset and} the value of the third parameter r _max , and the first search space includes each value corresponding to the value set of the α _offset The search space, the starting subframe of the search space corresponding to each value is a subframe that satisfies the following formula:

It should be understood that the process performed by the network module in the above-mentioned FIG. 11 is similar to the process performed by the network device in the foregoing method embodiment.

In the embodiment of the present application, the network device can dynamically indicate the search space by using the DCI, so that the search space can adapt to the dynamic change of the repetition number information. When the number of repetitions of the PUSCH is relatively small, the repetition is terminated in advance to avoid waste of resources; When it is large, it avoids frequent blind detection by the UE and saves resources.

The sending module in each of the foregoing devices may be a transmitting device, the receiving module may be a receiving device, and the processing unit may be a processor.

The communication device and the network device in the present application are introduced from the perspective of the function module. The communication device in the present application is introduced from the perspective of the physical hardware. The communication device may include a mobile phone, a tablet computer, and a personal digital assistant (personal digital). Assistant, PDA), point of sales (POS), car computer and other terminal devices, taking communication devices as mobile phones as an example:

FIG. 12 is a block diagram showing a partial structure of a mobile phone related to a communication device provided by an embodiment of the present invention. Referring to FIG. 12, the mobile phone includes: a radio frequency (RF) circuit 1210, a memory 1220, an input unit 1230, a display unit 1240, a sensor 1250, an audio circuit 1260, a wireless fidelity (WiFi) module 1270, and a processor 1280. And power supply 1290 and other components. It will be understood by those skilled in the art that the structure of the handset shown in FIG. 12 does not constitute a limitation to the handset, and may include more or less components than those illustrated, or some components may be combined, or different component arrangements.

The processor 1280 is a control center for the handset that connects various portions of the entire handset with various interfaces and lines, by running or executing software programs and/or modules stored in the memory 1220, and recalling data stored in the memory 1220. The mobile phone performs the flow performed by the terminal device in the embodiment shown in FIG. 4 or FIG. 7 above.

The network device in this application is introduced from the perspective of the physical hardware. The network device can be used by the base station or other network to send the received signal. The following takes the base station as an example.

FIG. 13 is a schematic structural diagram of a base station according to an embodiment of the present invention. The base station 1300 may generate a large difference due to different configurations or performances. Base station 1300 can include one or more central processing units (CPUs) 1322 (eg, one or more processors) and memory 1332, one or more storage media 1330 that store application 1342 or data 1344 (eg, One or one storage device in Shanghai). Among them, the memory 1332 and the storage medium 1330 may be short-term storage or persistent storage. The program stored on storage medium 1330 may include one or more modules (not shown), each of which may include a series of instruction operations in the base station. Still further, the central processor 1322 can be configured to communicate with the storage medium 1330 to perform a series of instruction operations in the storage medium 1330 on the base station 1300.

The steps performed by the network device in the above-described embodiment shown in FIG. 4 or FIG. 7 may be based on the base station structure shown in FIG. The embodiment of the present application further provides a computer storage medium for storing computer software instructions for the network device or the communication device, which includes a program for executing the network device or the terminal device.

The embodiment of the present application further provides a computer program product, where the computer program product includes computer software instructions, which can be loaded by a processor to implement the process executed by the network device or the terminal device in the data transmission method of FIG. 4 or FIG. 7 above. .

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be stored by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)) or the like.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

The above embodiments are only used to explain the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still The technical solutions described in the embodiments are modified, or the equivalents of the technical features are replaced by the equivalents. The modifications and substitutions of the embodiments do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

A data transmission method, comprising:

The terminal device receives the first downlink control information that is sent by the network device, where the first downlink control information is used to schedule the first uplink data transmission, where the first downlink control information includes the repetition quantity information of the physical uplink shared channel;

Determining, by the terminal device, the first search space according to the repetition quantity information of the physical uplink shared channel;

The terminal device detects second downlink control information in the first search space, where the second downlink control information is used to feed back the first uplink data and/or schedule a second uplink data transmission.
The method according to claim 1, wherein the repetition quantity information of the physical uplink shared channel indicates the number of repetitions of the physical uplink shared channel;

Determining, by the terminal device, the first search space according to the repetition quantity information of the physical uplink shared channel, including:

Determining, by the terminal device, the first search space according to a ratio of a repetition quantity of the physical uplink shared channel to a ratio of r max · G; where r max is a repetition of a maximum physical downlink control channel configured by radio resource control RRC signaling The number of times, G is a parameter configured by RRC signaling, and G is greater than or equal to 1.
The method of claim 2 wherein:

The starting subframe of the first search space is a subframe that satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe of the first search space is located, and n s is the slot number of the slot included in the start subframe in the radio frame, T= r max ·G,α offset =0;

If the ratio of the number of repetitions of the physical uplink shared channel to r max · G is greater than or equal to the first threshold, the β=1; if the ratio of the number of repetitions of the physical uplink shared channel to r max · G is less than The first threshold value, the value of 0 < β < 1.
The method according to claim 2, wherein the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe of the first search space is located, and n s is the slot number of the slot included in the start subframe in the radio frame, T= r max ·G;

If the ratio of the number of repetitions of the physical uplink shared channel to r max · G is greater than or equal to the first threshold, the α offset =0; if the ratio of the number of repetitions of the physical uplink shared channel to r max · G Less than the first threshold value, the α offset = {0, u 1 , u 2 ... u n }, where n ≥ 1 , 0 < u i < 1, the i is greater than or equal to 1 and less than or An integer equal to n.
The method according to any one of claims 1 to 4, characterized in that

The first search space does not include a portion overlapping with the second search space in the time domain, and the start subframe of the second search space is satisfied
a subframe, where n f ' is a frame number of a radio frame in which the start subframe of the second search space is located, and n s ' is a slot included in the start subframe in the radio frame The slot number, T=r max · G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, and G is a parameter configured by RRC signaling, G is greater than or equal to 1, and α offset '=0.
A data transmission method, comprising:

The terminal device receives the first downlink control information that is sent by the network device, where the first downlink control information is used to schedule the first uplink data transmission, and the first downlink control information includes the search space indication information, where the search space indicates Information is used to determine the first search space;

Determining, by the terminal device, the first search space according to the search space indication information;

The terminal device detects second downlink control information in the first search space, where the second downlink control information is used to feed back the first uplink data and/or schedule a second uplink data transmission.
The method according to claim 6, wherein the determining, by the terminal device, the first search space according to the search space indication information comprises:

The terminal device determines, according to the search space indication information, that one of the plurality of search spaces is the first search space, where the multiple search spaces are determined by the terminal device according to RRC signaling.
The method according to claim 6, wherein the determining, by the terminal device, the first search space according to the search space indication information comprises:

The terminal device determines, according to the search space indication information, at least one search space in a plurality of search spaces, where the first search space is a search space in which the at least one search space is combined, where the multiple The search space is determined by the user equipment according to RRC signaling.
The method according to claim 6, wherein the determining, by the terminal device, the first search space according to the search space indication information comprises:

Determining, by the terminal device, a value of the first parameter G according to the search space indication information;

The terminal device determines the first search space according to the value of the first parameter G, where a starting subframe of the first search space is a subframe that satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe of the first search space is located, and n s is the slot number of the slot included in the start subframe in the radio frame, T= r max · G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, α offset =0;

or,

Determining, by the terminal device, a value set of the second parameter α offset according to the search space indication information;

Determining, by the terminal device, the first search space according to the set of values, where the first search space includes a search space corresponding to each value in the set of values, where each value corresponds to The starting subframe of the search space satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe is located, and n s is the slot number of the time slot included in the start subframe in the radio frame, T=r max ·G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, and G is a parameter configured by RRC signaling, and G is greater than or equal to 1;

or,

Determining, by the terminal device, the value of the first parameter G and the value set of the second parameter α offset according to the search space indication information;

The first search space includes the search space corresponding to each value in the set of values according to the value of the G and the first search space determined by the set of values. The starting subframe of the search space corresponding to each value satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe of the second search space is located, and n s is the slot number of the slot included in the start subframe in the radio frame, T= r max · G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling.
A data transmission method, comprising:

The network device sends the first downlink control information to the terminal device, where the first downlink control information is used to schedule the first uplink data transmission, where the first downlink control information includes the repetition number information of the physical uplink shared channel;

Determining, by the network device, a first search space, where the first search space corresponds to a repetition quantity information of the physical uplink shared channel;

The network device sends the second downlink control information in the first search space, where the second downlink control information is used to feed back the first uplink data and/or schedule the second uplink data transmission.
The method according to claim 10, wherein the repetition quantity information of the physical uplink shared channel indicates the number of repetitions of the physical uplink shared channel;

The first search space corresponds to the number of times of repetition of the physical uplink shared channel, and includes:

The ratio of the number of repetitions to the ratio of r max ·G corresponds to the first search space; where r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, G is a parameter configured by RRC signaling, and G is greater than Or equal to 1.
The method of claim 11 wherein

The starting subframe of the first search space is a subframe that satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe of the first search space is located, and n s is the slot number of the slot included in the start subframe in the radio frame, T= r max ·G,α offset =0;

If the ratio of the number of repetitions of the physical uplink shared channel to r max · G is greater than or equal to the first threshold, the β=1; if the ratio of the number of repetitions of the physical uplink shared channel to r max · G is less than The first threshold value, the value of 0 < β < 1.
The method of claim 11 wherein

The starting subframe of the first search space is a subframe that satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe of the first search space is located, and n s is the slot number of the slot included in the start subframe in the radio frame, T=r max ·G;

If the ratio of the number of repetitions of the physical uplink shared channel to r max · G is greater than or equal to the first threshold, the α offset =0; if the ratio of the number of repetitions of the physical uplink shared channel to r max · G Less than the first threshold value, the α offset = {0, u 1 , u 2 ... u n }, where n ≥ 1 , 0 < u i < 1, the i is greater than or equal to 1 and less than or An integer equal to n.
The method according to any one of claims 10 to 13, wherein the first search space does not include a portion overlapping with a second search space in a time domain, and a start subframe of the second search space Subframes that satisfy the following formula:

Where n f ' is the frame number of the radio frame in which the start subframe of the second search space is located, and n s ' is the slot number of the slot included in the start subframe in the radio frame, T = r max · G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, G is a parameter of RRC signaling configuration, G is greater than or equal to 1, and α offset '=0.
A data transmission method, comprising:

The network device sends the first downlink control information to the terminal device, where the first downlink control information is used to schedule the first uplink data transmission;

The network device determines a first search space;

The network device sends the second downlink control information in the first search space, where the second downlink control information is used to feed back the first uplink data and/or schedule the second uplink data transmission;

The first downlink control information includes search space indication information, and the search space indication information is used by the terminal device to determine the first search space according to the search space indication information.
The method according to claim 15, wherein the search space indication information instructs the terminal device to determine one search space from a plurality of search spaces as a first search space, wherein the plurality of search spaces are A plurality of search spaces configured by the network device through RRC signaling.
The method according to claim 15, wherein the search space indication information instructs the terminal device to determine at least one search space from a plurality of search spaces, the first search space being the at least one search space combination a search space, wherein the plurality of search spaces are a plurality of search spaces configured by the network device through RRC signaling.
The method according to claim 15, wherein the search space indication information is used to indicate a value of the first parameter G;

The starting subframe of the first search space is a subframe that satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe is located, and n s is the slot number of the time slot included in the start subframe in the radio frame, T=r max ·G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, α offset =0;

or,

The search space indication information is used to indicate a set of values of the second parameter α offset ;

The first search space includes a search space corresponding to each value in the set of values, and a starting subframe of the search space corresponding to each value satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe is located, and n s is the slot number of the time slot included in the start subframe in the radio frame, T=r max ·G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, and G is a parameter configured by RRC signaling, and G is greater than or equal to 1;

or,

The search space indication information is used to indicate a value of the first parameter G and a value set of the second parameter α offset ;

The first search space includes a search space corresponding to each value in the set of values, and a starting subframe of the search space corresponding to each value satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe of the second search space is located, and n s is the slot number of the slot included in the start subframe in the radio frame, T= r max · G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling.
A communication device, comprising: a processing module, a receiving module;

The receiving module is configured to receive first downlink control information that is sent by the network device, where the first downlink control information is used to schedule a first uplink data transmission, where the first downlink control information includes a physical uplink shared channel. Repeat count information;

The processing module is configured to determine, according to the repetition quantity information of the physical uplink shared channel, a first search space;

The receiving module is further configured to detect second downlink control information in the first search space, where the second downlink control information is used to feed back the first uplink data and/or schedule a second uplink data transmission. .
The communication device according to claim 19, wherein the repetition quantity information of the physical uplink shared channel indicates the number of repetitions of the physical uplink shared channel;

The processing module is specifically configured to determine the first search space according to a ratio of a repetition quantity of the physical uplink shared channel to a ratio of r max · G, where r max is a maximum physical downlink configured by radio resource control RRC signaling The number of repetitions of the control channel, G is a parameter of RRC signaling configuration, and G is greater than or equal to 1.
The communication device according to claim 20, wherein the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe of the first search space is located, and n s is the slot number of the slot included in the start subframe in the radio frame, T= r max ·G,α offset =0;

If the ratio of the number of repetitions of the physical uplink shared channel to r max · G is greater than or equal to the first threshold, the β=1; if the ratio of the number of repetitions of the physical uplink shared channel to r max · G is less than The first threshold value, the value of 0 < β < 1.
The communication device according to claim 20, wherein the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe of the first search space is located, and n s is the slot number of the slot included in the start subframe in the radio frame, T= r max ·G;

If the ratio of the number of repetitions of the physical uplink shared channel to r max · G is greater than or equal to the first threshold, the α offset =0; if the ratio of the number of repetitions of the physical uplink shared channel to r max · G Less than the first threshold value, the α offset = {0, u 1 , u 2 ... u n }, where n ≥ 1 , 0 < u i < 1, the i is greater than or equal to 1 and less than or An integer equal to n.
The communication device according to any one of claims 19 to 22, wherein the first search space does not include a portion overlapping the second search space in the time domain, and the start of the second search space Subframe is satisfied
a subframe, where n f ' is a frame number of a radio frame in which the start subframe of the second search space is located, and n s ' is a slot included in the start subframe in the radio frame The slot number, T=r max · G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, and G is a parameter configured by RRC signaling, G is greater than or equal to 1, and α offset '=0.
A communication device, comprising: a processing module, a receiving module;

The receiving module is configured to receive first downlink control information that is sent by the network device, where the first downlink control information is used to schedule a first uplink data transmission, where the first downlink control information includes search space indication information, The search space indication information is used to determine a first search space;

The processing module is configured to determine a first search space according to the search space indication information;

The receiving module is further configured to detect second downlink control information in the first search space, where the second downlink control information is used to feed back the first uplink data and/or schedule a second uplink data transmission. .
A communication device according to claim 24, wherein

The processing module is specifically configured to determine, according to the search space indication information, that one of the plurality of search spaces is the first search space, where the multiple search spaces are the RRC Make sure.
A communication device according to claim 24, wherein

The processing module is configured to determine, according to the search space indication information, at least one search space in a plurality of search spaces, where the first search space is a search space in which the at least one search space is combined, where The plurality of search spaces are determined by the user equipment according to RRC signaling.
A communication device according to claim 24, wherein

The processing module is configured to determine a value of the first parameter G according to the search space indication information, and determine, according to the value of the first parameter G, the first search space, where the first search space starts. A subframe is a subframe that satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe of the first search space is located, and n s is the slot number of the slot included in the start subframe in the radio frame, T= r max · G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, α offset =0;

or,

The processing module is configured to determine a value set of the second parameter α offset according to the search space indication information, and determine the first search space according to the value set, where the first search space includes the A search space corresponding to each value in the set of values, where the starting subframe of the search space corresponding to each value satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe is located, and n s is the slot number of the time slot included in the start subframe in the radio frame, T=r max ·G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, and G is a parameter configured by RRC signaling, and G is greater than or equal to 1;

or,

The processing module is specifically configured to determine, by the search space indication information, a value of the first parameter G and a value set of the second parameter α offset , and determine the first according to the value of the G and the value set. a search space, the first search space includes a search space corresponding to each value in the set of values, and a starting subframe of the search space corresponding to each value satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe of the second search space is located, and n s is the slot number of the slot included in the start subframe in the radio frame, T= r max · G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling.
A network device, comprising: a processing module, a sending module;

The sending module is configured to send, to the terminal device, first downlink control information, where the first downlink control information is used to schedule a first uplink data transmission, where the first downlink control information includes a repetition of a physical uplink shared channel. Number of times

The processing module is configured to determine a first search space, where the first search space corresponds to the repetition quantity information of the physical uplink shared channel;

The sending module is further configured to send, in the first search space, second downlink control information, where the second downlink control information is used to feed back the first uplink data and/or schedule a second uplink data transmission. .
The network device according to claim 28, wherein the repetition quantity information of the physical uplink shared channel indicates the number of repetitions of the physical uplink shared channel;

The first search space corresponds to the number of times of repetition of the physical uplink shared channel, and includes:

The ratio of the number of repetitions to the ratio of r max ·G corresponds to the first search space; where r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, G is a parameter configured by RRC signaling, and G is greater than Or equal to 1.
The network device according to claim 29, wherein the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe of the first search space is located, and n s is the slot number of the slot included in the start subframe in the radio frame, T= r max ·G,α offset =0;

If the ratio of the number of repetitions of the physical uplink shared channel to r max · G is greater than or equal to the first threshold, the β=1; if the ratio of the number of repetitions of the physical uplink shared channel to r max · G is less than The first threshold value, the value of 0 < β < 1.
The network device according to claim 29, wherein the starting subframe of the first search space is a subframe that satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe of the first search space is located, and n s is the slot number of the slot included in the start subframe in the radio frame, T=r max ·G;

If the ratio of the number of repetitions of the physical uplink shared channel to r max · G is greater than or equal to the first threshold, the α offset =0; if the ratio of the number of repetitions of the physical uplink shared channel to r max · G Less than the first threshold value, the α offset = {0, u 1 , u 2 ... u n }, where n ≥ 1 , 0 < u i < 1, the i is greater than or equal to 1 and less than or An integer equal to n.
A network device according to any one of claims 29 to 31, characterized in that

The first search space does not include a portion overlapping with the second search space in the time domain, and the start subframe of the second search space is satisfied
a subframe, where n f ' is a frame number of a radio frame in which the start subframe of the second search space is located, and n s ' is a slot included in the start subframe in the radio frame The slot number, T=r max · G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, and G is a parameter configured by RRC signaling, G is greater than or equal to 1, and α offset '=0.
A network device, comprising: a processing module, a sending module;

The sending module is configured to send first downlink control information to the terminal device, where the first downlink control information is used to schedule the first uplink data transmission;

The processing module is configured to determine a first search space;

The sending module is further configured to send, in the first search space, second downlink control information, where the second downlink control information is used to feed back the first uplink data and/or schedule a second uplink data transmission. ;

The first downlink control information includes search space indication information, and the search space indication information is used by the terminal device to determine the first search space according to the search space indication information.
The network device according to claim 33, wherein the search space indication information instructs the terminal device to determine one search space from a plurality of search spaces as a first search space, wherein the plurality of search spaces are The plurality of search spaces configured by the network device by using RRC signaling.
The network device according to claim 33, wherein the search space indication information instructs the terminal device to determine at least one search space from a plurality of search spaces, the first search space being the at least one search space The combined search space, wherein the plurality of search spaces are a plurality of search spaces configured by the network device through RRC signaling.
The network device according to claim 33, wherein the search space indication information is used to indicate a value of the first parameter G;

The starting subframe of the first search space is a subframe that satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe is located, and n s is the slot number of the time slot included in the start subframe in the radio frame, T=r max ·G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, α offset =0;

or,

The search space indication information is used to indicate a set of values of the second parameter α offset ;

The first search space includes a search space corresponding to each value in the set of values, and a starting subframe of the search space corresponding to each value satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe is located, and n s is the slot number of the time slot included in the start subframe in the radio frame, T=r max ·G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling, and G is a parameter configured by RRC signaling, and G is greater than or equal to 1;

or,

The search space indication information is used to indicate a value of the first parameter G and a value set of the second parameter α offset ;

The first search space includes a search space corresponding to each value in the set of values, and a starting subframe of the search space corresponding to each value satisfies the following formula:

Where n f is the frame number of the radio frame in which the start subframe of the second search space is located, and n s is the slot number of the slot included in the start subframe in the radio frame, T= r max · G, r max is the number of repetitions of the maximum physical downlink control channel configured by RRC signaling.