CN111935836A - Method for controlling information transmission in Internet of things - Google Patents
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Abstract
The invention is suitable for the field of information transmission, and provides a method for controlling information transmission in the Internet of things, which comprises the following steps: step S1: the second communication node feeds back the reception quality information of the downlink beam to the first communication node, and step S2: the first communication node sends first downlink control information to a second communication node through the first downlink wave beam, and sends a first downlink service data packet to the second communication node on a time-frequency resource indicated by the first downlink control information, so that the problem to be solved in a fifth generation mobile communication system is the problem of reliable transmission of a control channel in a high-frequency-band Internet of things scene, and particularly in an environment with fast channel condition change, the technical problem that the transmission spectrum efficiency of the control channel is low or the reliability of the control channel cannot be guaranteed due to a common solution is solved.
Description
Technical Field
The invention belongs to the field of information transmission, and particularly relates to a method for controlling information transmission in the Internet of things.
Background
The 5G can meet diversified business requirements of people in various areas such as residence, work, leisure and traffic, and can provide extremely-sophisticated business experience such as ultra-high-definition video, virtual reality, augmented reality, cloud desktops and online games for users even in scenes with ultra-high traffic density, ultra-high connection number density and ultra-high mobility characteristics such as dense residential areas, offices, stadiums, outdoor gatherings, subways, expressways, high-speed rails and wide area coverage. Meanwhile, 5G can permeate into the fields of the Internet of things and various industries, is deeply integrated with industrial facilities, medical instruments, vehicles and the like, effectively meets the diversified business requirements of the vertical industries such as industry, medical treatment, transportation and the like, and realizes real 'everything interconnection'.
The 5G application scenarios can be divided into two broad categories, namely mobile broadband (MBB) and internet of things (IoT). Among these, the main technical requirements for mobile broadband access are high capacity, providing high data rates to meet the ever-increasing demand for data services. The internet of things is mainly driven by the requirement of machine communication (MTC), and can be further divided into two types, including low-speed Mass Machine Communication (MMC) and low-latency high-reliability machine communication. For the low-speed mass machine communication, mass nodes are accessed at a low speed, the transmitted data packets are usually small, the interval time is relatively long, and the cost and the power consumption of the nodes are usually low; for machine communication with low time delay and high reliability, the method is mainly used for machine communication with higher requirements on instantaneity and reliability, such as real-time alarm, real-time monitoring and the like.
In a fifth generation mobile communication system, a problem to be solved is the reliable transmission of a control channel in a scenario of using a high-frequency internet of things, and particularly in an environment where a channel condition changes rapidly, a conventional solution may cause low transmission spectrum efficiency of the control channel or the reliability of the control channel cannot be guaranteed.
Disclosure of Invention
The invention aims to provide a method for controlling information transmission in the Internet of things, and aims to solve the technical problems that in a fifth generation mobile communication system, the problem to be solved is the reliable transmission of a control channel in the scene of using the high-frequency-band Internet of things, and particularly, in an environment with fast channel condition change, the transmission spectrum efficiency of the control channel is low or the reliability of the control channel cannot be ensured by a common solution.
The invention is realized in such a way that a method for controlling information transmission in the Internet of things comprises the following steps:
step S1: the second communication node feeds back the receiving quality information of the downlink beam to the first communication node, wherein the receiving quality information of the downlink beam comprises the receiving quality information Q1 of the first downlink beam, the receiving quality information Q2 of the second downlink beam, the receiving quality information Q3 of the third downlink beam, and Q1> Q2> Q3;
step S2: the first communication node sends first downlink control information to a second communication node through the first downlink beam, and sends a first downlink traffic data packet to the second communication node on a time-frequency resource indicated by the first downlink control information, wherein a0 first control channel basic units are needed to be used for sending the first downlink control information, the first control channel basic units include Al subcarriers carrying useful information and a2 subcarriers carrying demodulation reference signals, a0 is an integer greater than or equal to 4, a1 is an integer greater than or equal to 8, and a2 is an integer greater than or equal to 4;
step S3: the second communication node receives the first downlink control information, tries to receive the first downlink traffic data packet on the time-frequency resource indicated by the first downlink control information, feeds back successful receiving information to the first communication node if the first downlink traffic data packet is received, and feeds back failed receiving information to the first communication node if the first downlink traffic data packet is not received;
step S4: if the first communication node receives the successful reception information fed back by the second communication node, the first communication node continues to send second downlink control information to the second communication node through the first downlink beam, wherein the second downlink control information occupies A0 first control channel basic units;
step S5: if the first communication node receives reception failure information fed back by the second communication node, the first communication node sends second downlink control information to the second communication node through the second downlink beam, and sends a second downlink service data packet to the second communication node on a time-frequency resource indicated by the second downlink control information, where the second downlink control information uses a0/2 first control channel basic units and B0/2 second control channel basic units, the second control channel basic units include B1 subcarriers carrying useful information and B2 subcarriers carrying demodulation reference signals, B0 is an integer multiple of a0, B1 is a positive integer less than or equal to a1, and B2 is a positive integer greater than or equal to a 2;
step S6: the second communication node receives the second downlink control information, tries to receive the second downlink service data packet on the time-frequency resource indicated by the second downlink control information, feeds back successful receiving information to the first communication node if the second downlink service data packet is received, and feeds back failed receiving information to the first communication node if the second downlink service data packet is not received;
step S7: if the first communication node receives the reception success information fed back by the second communication node, when A0/2+ B0/4 is greater than or equal to A0, the first communication node transmits third downlink control information to the second communication node through the second downlink beam by using A0/2 first control channel basic units and B0/4 second control channel basic units; when A0/2+ B0/4 is less than A0, the first communication node transmitting third downlink control information to the second communication node using A0 first control channel elements through the second downlink beam;
step S8: if the first communication node receives the reception failure information fed back by the second communication node and the first communication node supports the transmission of one downlink beam at each moment, the first communication node transmits third downlink control information to the second communication node by using B0 second control channel basic units through the third downlink beam;
step S9: if the first communication node receives the reception failure information fed back by the second communication node, and the first communication node supports the transmission of at least three downlink beams at each moment, and the second communication node supports the reception of at least three downlink beams at each moment, the first communication node transmits third downlink control information to the second communication node by using B0 second control channel basic units through the first downlink beam, the second downlink beam, and the third downlink beam.
The further technical scheme of the invention is as follows: the power used by the second communication node for feeding back the information of successful reception is XdB greater than the power used by the second communication node for feeding back the information of failed reception, wherein the value of X is greater than or equal to 3.
The further technical scheme of the invention is as follows: the resource required for the transmission of the feedback information generated by the second communication node based on the second downlink service data packet is a multiple of (the sum of the number of the first control channel basic units for transmitting the second downlink control information and the number of the second control channel basic units)/(the number of the first control channel basic units for transmitting the first downlink control information) the resource required for the transmission of the feedback information generated by the second communication node based on the first downlink service data packet.
The further technical scheme of the invention is as follows: the ratio of A1 to A2 is greater than or equal to 2 and less than or equal to 4.
The further technical scheme of the invention is as follows: the ratio of B1 to B2 is greater than or equal to 0.1 and less than or equal to 2.
The further technical scheme of the invention is as follows: and the transmission power of the sub-carrier carrying the useful information in the first control channel basic unit is the same as that of the sub-carrier carrying the demodulation reference signal.
The further technical scheme of the invention is as follows: the transmission power of the sub-carrier carrying the useful information in the second control channel basic unit is 3dB lower than that of the sub-carrier carrying the demodulation reference signal.
The further technical scheme of the invention is as follows: the feedback failure information in step S2 includes a first received signal to interference plus noise ratio of the first downlink service data packet, and the feedback failure information in step S5 includes a second received signal to interference plus noise ratio of the second downlink service data packet.
The further technical scheme of the invention is as follows: when the first received signal to interference plus noise ratio is greater than or equal to the second received signal to interference plus noise ratio by more than 6dB, the first communication node repeatedly transmits the third downlink control information to the second communication node by additionally using C0 second control channel basic units through the third downlink beam, where C0 is an integer greater than or equal to B0; when the first rssi is greater than or equal to 9dB, the first communication node repeatedly transmits the third downlink control information to the second communication node by using an additional D0 basic units of the first control channel through the third downlink beam, where D0 is an integer greater than or equal to 2 a 0.
The further technical scheme of the invention is as follows: the second communication node may perform joint channel estimation among a0 first control channel elements based on the demodulation reference signal-carrying subcarriers, and the second communication node may perform independent channel estimation based on the demodulation reference signal-carrying subcarriers of each second control channel element.
The invention has the beneficial effects that: compared with the prior art, the method for controlling information transmission in the Internet of things overcomes the problem of transmission reliability of the control channel in the prior Internet of things, and improves the transmission reliability of the control channel.
Drawings
Fig. 1 is a flowchart of a method for controlling information transmission in an internet of things according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a control channel basic unit of a method for controlling information transmission in the internet of things according to an embodiment of the present invention.
Detailed Description
Fig. 1-2 illustrate a method for controlling information transmission in the internet of things provided by the present invention, the method comprising the following steps:
step S1: the second communication node feeds back the receiving quality information of the downlink beam to the first communication node, wherein the receiving quality information of the downlink beam comprises the receiving quality information Q1 of the first downlink beam, the receiving quality information Q2 of the second downlink beam, the receiving quality information Q3 of the third downlink beam, and Q1> Q2> Q3;
step S2: the first communication node sends first downlink control information to a second communication node through the first downlink beam, and sends a first downlink traffic data packet to the second communication node on a time-frequency resource indicated by the first downlink control information, wherein a0 first control channel basic units are needed to be used for sending the first downlink control information, the first control channel basic units include Al subcarriers carrying useful information and a2 subcarriers carrying demodulation reference signals, a0 is an integer greater than or equal to 4, a1 is an integer greater than or equal to 8, and a2 is an integer greater than or equal to 4;
step S3: the second communication node receives the first downlink control information, tries to receive the first downlink traffic data packet on the time-frequency resource indicated by the first downlink control information, feeds back successful receiving information to the first communication node if the first downlink traffic data packet is received, and feeds back failed receiving information to the first communication node if the first downlink traffic data packet is not received;
step S4: if the first communication node receives the successful reception information fed back by the second communication node, the first communication node continues to send second downlink control information to the second communication node through the first downlink beam, wherein the second downlink control information occupies A0 first control channel basic units;
step S5: if the first communication node receives reception failure information fed back by the second communication node, the first communication node sends second downlink control information to the second communication node through the second downlink beam, and sends a second downlink service data packet to the second communication node on a time-frequency resource indicated by the second downlink control information, where the second downlink control information uses a0/2 first control channel basic units and B0/2 second control channel basic units, the second control channel basic units include B1 subcarriers carrying useful information and B2 subcarriers carrying demodulation reference signals, B0 is an integer multiple of a0, B1 is a positive integer less than or equal to a1, and B2 is a positive integer greater than or equal to a 2;
step S6: the second communication node receives the second downlink control information, tries to receive the second downlink service data packet on the time-frequency resource indicated by the second downlink control information, feeds back successful receiving information to the first communication node if the second downlink service data packet is received, and feeds back failed receiving information to the first communication node if the second downlink service data packet is not received;
step S7: if the first communication node receives the reception success information fed back by the second communication node, when A0/2+ B0/4 is greater than or equal to A0, the first communication node transmits third downlink control information to the second communication node through the second downlink beam by using A0/2 first control channel basic units and B0/4 second control channel basic units; when A0/2+ B0/4 is less than A0, the first communication node transmitting third downlink control information to the second communication node using A0 first control channel elements through the second downlink beam;
step S8: if the first communication node receives the reception failure information fed back by the second communication node and the first communication node supports the transmission of one downlink beam at each moment, the first communication node transmits third downlink control information to the second communication node by using B0 second control channel basic units through the third downlink beam;
step S9: if the first communication node receives the reception failure information fed back by the second communication node, and the first communication node supports the transmission of at least three downlink beams at each moment, and the second communication node supports the reception of at least three downlink beams at each moment, the first communication node transmits third downlink control information to the second communication node by using B0 second control channel basic units through the first downlink beam, the second downlink beam, and the third downlink beam.
The present invention will be described in detail below with reference to embodiments by taking a base station and a terminal as examples.
Example 1
Step S1: the terminal feeds back the reception quality information of the downlink beam to the base station, wherein the reception quality information of the downlink beam includes reception quality information Q1 of the first downlink beam, reception quality information Q2 of the second downlink beam, reception quality information Q3 of the third downlink beam, and Q1> Q2> Q3. The terminal can complete the beam training process, and the purpose of reporting multiple downlink beams is that the situation that a beam propagation path is blocked or the propagation quality is suddenly reduced easily occurs in a high-frequency scene, and the base station needs to maintain a plurality of beam link pairs with the terminal to solve the problem that the currently used beam links cannot communicate.
Step S2: the base station sends first downlink control information to the terminal through a first downlink beam, and sends a first downlink service data packet to the terminal on a time-frequency resource indicated by the first downlink control information, where a0 first control channel basic units are needed to be used for sending the first downlink control information, the first control channel basic units include a1 subcarriers carrying useful information and a2 subcarriers carrying demodulation reference signals, a0 is an integer greater than or equal to 4, a1 is an integer greater than or equal to 8, and a2 is an integer greater than or equal to 4. The demodulation reference signal (may also be referred to as a pilot) is used for downlink channel estimation, and the terminal demodulates and decodes the useful information bits based on the downlink channel estimation result.
Step S3: the terminal receives the first downlink control information, tries to receive the first downlink traffic data packet on the time-frequency resource indicated by the first downlink control information, feeds back successful receiving information to the base station if the first downlink traffic data packet is received, and feeds back failed receiving information to the base station if the first downlink traffic data packet is not received.
Step S4: and if the base station receives the successful receiving information fed back by the terminal, the base station continuously sends second downlink control information to the terminal through the first downlink wave beam, wherein the second downlink control information occupies A0 basic units of the first control channel. This shows that the downlink channel condition between the base station and the terminal is better at present, and the base station can continue to use the original mode to send the downlink control information to the terminal.
Step S5: if the base station receives the reception failure information fed back by the terminal, the base station sends second downlink control information to the terminal by switching to a second downlink beam, and sends a second downlink service data packet to the terminal on the time-frequency resource indicated by the second downlink control information, wherein the second downlink control information uses A0/2 first control channel basic units and B0/2 second control channel basic units, the second control channel basic units include B1 subcarriers carrying useful information and B2 subcarriers carrying demodulation reference signals, B0 is an integer multiple of A0, Bl is a positive integer less than or equal to A1, and B2 is a positive integer greater than or equal to A2. The reason for this is that the downlink channel condition of the first downlink beam between the base station and the terminal deteriorates, the base station needs to transmit downlink control information in a more robust manner, i.e., switch to the second transmission beam, and since the base station uses the second downlink beam with the reception quality worse than the first downlink beam to transmit information to the terminal, more subcarriers are needed to perform accurate channel estimation, so each second control channel basic unit has more subcarriers to carry demodulation reference signals than the first control channel basic unit.
Step S6: and the terminal receives the second downlink control information, tries to receive the second downlink service data packet on the time-frequency resource indicated by the second downlink control information, feeds back successful receiving information to the base station if the second downlink service data packet is received, and feeds back failed receiving information to the base station if the second downlink service data packet is not received.
Step S7: if the base station receives the successful receiving information fed back by the terminal, when A0/2+ B0/4 is greater than or equal to A0, the base station sends third downlink control information to the terminal by using A0/2 first control channel basic units and B0/4 second control channel basic units through a second downlink beam; and when the A0/2+ B0/4 is smaller than the A0, the base station transmits third downlink control information to the terminal by using the A0 first control channel basic units through the second downlink beam. In this scenario, it is described that the channel condition between the base station and the terminal becomes good, and resources required for transmitting the downlink control information can be reduced appropriately.
Step S8: and if the base station receives the reception failure information fed back by the terminal and supports the transmission of one downlink beam at each moment, the base station uses B0 second control channel basic units to transmit third downlink control information to the terminal by switching to a third downlink beam. In this scenario, it is required to switch to a new available beam and use more resources to transmit downlink control information to ensure that the terminal can successfully receive the downlink control information, which indicates that the channel environment between the base station and the terminal is further deteriorated.
Step S9: and if the base station receives the reception failure information fed back by the terminal, supports the transmission of at least three downlink beams at each moment, and supports the reception of at least three downlink beams at each moment, the base station transmits third downlink control information to the terminal by using B0 second control channel basic units through the first downlink beam, the second downlink beam and the third downlink beam. The purpose of this is to obtain a larger beam diversity gain by transmitting the same content on the same time-frequency resource through more beams, thereby greatly improving the success probability of receiving the downlink control information.
It should be noted that the terminal may use the same or different receiving beams to receive downlink information transmitted by the base station using different beams.
Example 2
On the basis of the embodiment 1, the power used by the terminal for feeding back the reception success information is larger than the power used by the terminal for feeding back the reception failure information by XdB, wherein the value of X is larger than or equal to 3. The method has the advantages that the base station can successfully receive the successful receiving information fed back by the terminal, and the situation that the network performance of the internet of things is seriously influenced due to the fact that the judgment of the size of the resource used by the downlink control information sent subsequently is inconsistent between the terminal and the base station caused by the failure of receiving the feedback information is avoided.
Example 3
Based on embodiment 1, the resource required for the transmission of the feedback information generated by the terminal based on the second downlink traffic data packet is a multiple of (the sum of the number of the first control channel basic units for transmitting the second downlink control information and the number of the second control channel basic units)/(the number of the first control channel basic units for transmitting the first downlink control information) the resource required for the transmission of the feedback information generated by the terminal based on the first downlink traffic data packet. The reason for this is that it is desirable that the resources used by the terminal to send the feedback information can match the channel variation between the base station and the terminal, for example, when the resources used by the base station to send the downlink control information become more, the resources used by the terminal to send the feedback information also become more, and vice versa, so as to ensure the reliability of the control channel communication, especially the internet of things using the time division duplex mode.
Example 4
In example 1, the ratio of a1 to a2 was 2 or more and 4 or less. This has the advantage of avoiding too few subcarriers in each first control channel element to transmit the demodulation reference signal.
Example 5
In example 1, the ratio of B1 to B2 was 0.1 or more and 2 or less. The reason for this is that the channel environment between the base station and the terminal deteriorates at this time, and therefore, it is necessary to use more subcarriers to perform prepared channel estimation, thereby increasing the probability of successful decoding of the downlink control information.
Example 6
On the basis of embodiment 1, the transmission power on the subcarriers carrying useful information and the subcarriers carrying demodulation reference signals in the first control channel basic unit is the same. The reason for this is that the quality of the downlink channel between the base station and the terminal is good in this scenario, the base station does not need to additionally increase the transmission power of the subcarrier where the demodulation reference signal is located, and the terminal can also obtain a more accurate downlink channel.
Example 7
On the basis of embodiment 1, the transmission power of the subcarriers carrying useful information in the second control channel elementary unit is 3dB lower than the transmission power on the subcarriers carrying the demodulation reference signals. The reason for this is that the quality of the downlink channel between the base station and the terminal is degraded in such a scenario, and the base station needs to additionally increase the transmission power of the subcarrier where the demodulation reference signal is located, so that the terminal can obtain a more accurate downlink channel. It should be noted that the terminal can only obtain a relatively accurate downlink channel estimation result to effectively perform demodulation and decoding of the control channel information.
Example 8
Based on embodiment 1, the feedback failure information in step S2 includes a first received signal to interference and noise ratio of the first downlink service data packet, and the feedback failure information in step S5 includes a second received signal to interference and noise ratio of the second downlink service data packet. This has the advantage that the base station can obtain more downlink channel information to better transmit the subsequent downlink control information.
Example 9
On the basis of embodiment 8, when the first received sir is greater than or equal to the second received sir by more than 6dB, the base station additionally uses C0 basic units of the second control channel to repeatedly send the third downlink control information to the terminal, where C0 is an integer greater than or equal to B0, which is because the downlink channel between the base station and the terminal becomes worse in this scenario, and the base station must use additional resources to send the downlink control information to ensure the reliability of successful reception by the terminal; when the first received signal-to-interference-and-noise ratio is greater than or equal to 9dB of the second received signal-to-interference-and-noise ratio, the base station additionally uses D0 basic units of the first control channel to repeatedly send third downlink control information to the terminal, wherein D0 is an integer greater than or equal to 2 × a0, which has the advantage that when the downlink channel between the base station and the terminal becomes very bad, the base station needs more resources to transmit the downlink control information to obtain more coding gain to overcome the bad environment.
Example 10
On the basis of embodiment 1, the terminal may perform joint channel estimation among a0 first control channel basic units based on the sub-carriers carrying demodulation reference signals, and perform independent channel estimation based on the sub-carriers carrying demodulation reference signals of each second control channel basic unit. The reason for this is that the terminal can flexibly adapt to different channel environments, when the downlink channel delay of the base station and the terminal is large (generally, the channel condition is poor), the channel changes in the frequency domain relatively quickly, and it is relatively suitable to use the second control channel basic unit to transmit the downlink control information, and when the downlink channel delay of the base station and the terminal is small (generally, the channel condition is good), it is relatively suitable to use the first control channel basic unit to transmit the downlink control information. It should be noted that the above channel estimation operation is performed on a per beam basis.
Compared with the prior art, the method for controlling information transmission in the Internet of things overcomes the problem of transmission reliability of the control channel in the prior Internet of things, and improves the transmission reliability of the control channel.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for controlling information transmission in the Internet of things is characterized by comprising the following steps:
step S1: the second communication node feeds back the receiving quality information of the downlink beam to the first communication node, wherein the receiving quality information of the downlink beam comprises the receiving quality information Q1 of the first downlink beam, the receiving quality information Q2 of the second downlink beam, the receiving quality information Q3 of the third downlink beam, and Q1> Q2> Q3;
step S2: the first communication node sends first downlink control information to a second communication node through the first downlink beam, and sends a first downlink traffic data packet to the second communication node on a time-frequency resource indicated by the first downlink control information, wherein a0 first control channel basic units are needed to be used for sending the first downlink control information, the first control channel basic units include Al subcarriers carrying useful information and a2 subcarriers carrying demodulation reference signals, a0 is an integer greater than or equal to 4, a1 is an integer greater than or equal to 8, and a2 is an integer greater than or equal to 4;
step S3: the second communication node receives the first downlink control information, tries to receive the first downlink traffic data packet on the time-frequency resource indicated by the first downlink control information, feeds back successful receiving information to the first communication node if the first downlink traffic data packet is received, and feeds back failed receiving information to the first communication node if the first downlink traffic data packet is not received;
step S4: if the first communication node receives the successful reception information fed back by the second communication node, the first communication node continues to send second downlink control information to the second communication node through the first downlink beam, wherein the second downlink control information occupies A0 first control channel basic units;
step S5: if the first communication node receives reception failure information fed back by the second communication node, the first communication node sends second downlink control information to the second communication node through the second downlink beam, and sends a second downlink service data packet to the second communication node on a time-frequency resource indicated by the second downlink control information, where the second downlink control information uses a0/2 first control channel basic units and B0/2 second control channel basic units, the second control channel basic units include B1 subcarriers carrying useful information and B2 subcarriers carrying demodulation reference signals, B0 is an integer multiple of a0, B1 is a positive integer less than or equal to a1, and B2 is a positive integer greater than or equal to a 2;
step S6: the second communication node receives the second downlink control information, tries to receive the second downlink service data packet on the time-frequency resource indicated by the second downlink control information, feeds back successful receiving information to the first communication node if the second downlink service data packet is received, and feeds back failed receiving information to the first communication node if the second downlink service data packet is not received;
step S7: if the first communication node receives the reception success information fed back by the second communication node, when A0/2+ B0/4 is greater than or equal to A0, the first communication node transmits third downlink control information to the second communication node through the second downlink beam by using A0/2 first control channel basic units and B0/4 second control channel basic units; when A0/2+ B0/4 is less than A0, the first communication node transmitting third downlink control information to the second communication node using A0 first control channel elements through the second downlink beam;
step S8: if the first communication node receives the reception failure information fed back by the second communication node and the first communication node supports the transmission of one downlink beam at each moment, the first communication node transmits third downlink control information to the second communication node by using B0 second control channel basic units through the third downlink beam;
step S9: if the first communication node receives the reception failure information fed back by the second communication node, and the first communication node supports the transmission of at least three downlink beams at each moment, and the second communication node supports the reception of at least three downlink beams at each moment, the first communication node transmits third downlink control information to the second communication node by using B0 second control channel basic units through the first downlink beam, the second downlink beam, and the third downlink beam.
2. The method of claim 1, wherein the power used by the second communication node for feeding back the reception success information is larger than the power used by the second communication node for feeding back the reception failure information by XdB, wherein a value of X is greater than or equal to 3.
3. The method of claim 1, wherein the resource required for the feedback information transmission generated by the second communication node based on the second downlink traffic data packet is a multiple of (the sum of the number of first control channel basic units for transmitting the second downlink control information and the number of second control channel basic units)/(the number of first control channel basic units for transmitting the first downlink control information) the resource required for the feedback information transmission generated by the second communication node based on the first downlink traffic data packet.
4. The method of claim 1, wherein the ratio of A1 to A2 is greater than or equal to 2 and less than or equal to 4.
5. The method of claim 1, wherein the ratio of B1 to B2 is greater than or equal to 0.1 and less than or equal to 2.
6. The method of claim 1, wherein the transmission power on the subcarriers carrying useful information and the subcarriers carrying demodulation reference signals in the first control channel elementary unit is the same.
7. The method of claim 1, wherein the transmission power of the subcarriers carrying useful information in the second control channel elementary unit is 3dB lower than the transmission power on the subcarriers carrying demodulation reference signals.
8. The method of claim 1, wherein the feedback failure information in step S2 includes a first received signal to interference and noise ratio of a first downlink traffic data packet, and the feedback failure information in step S5 includes a second received signal to interference and noise ratio of a second downlink traffic data packet.
9. The method of claim 8, wherein when the first SINR is 6dB or more greater than the second SINR, the first communication node repeatedly transmits the third downlink control information to the second communication node through the third downlink beam by additionally using C0 second control channel basic units, wherein C0 is an integer of 0 or more; when the first rssi is greater than or equal to 9dB, the first communication node repeatedly transmits the third downlink control information to the second communication node by using an additional D0 basic units of the first control channel through the third downlink beam, where D0 is an integer greater than or equal to 2 a 0.
10. The method of claim 1, wherein the second communication node performs joint channel estimation among A0 first control channel elements based on the demodulation reference signal-carrying subcarriers, and wherein the second communication node performs independent channel estimation based on the demodulation reference signal-carrying subcarriers of each second control channel element.
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