CN111092699A - Information transmission method, device, terminal equipment and storage medium - Google Patents
Information transmission method, device, terminal equipment and storage medium Download PDFInfo
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- CN111092699A CN111092699A CN201911400178.4A CN201911400178A CN111092699A CN 111092699 A CN111092699 A CN 111092699A CN 201911400178 A CN201911400178 A CN 201911400178A CN 111092699 A CN111092699 A CN 111092699A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
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Abstract
The application provides an information transmission method, an information transmission device, a terminal device and a storage medium, wherein the method comprises the following steps: receiving an original data packet of original data; sending feedback information under the condition that the original data packet is detected wrongly, wherein the feedback information comprises retransmission control information, and the retransmission control information controls the retransmission of the original data; receiving a retransmission data packet, wherein the retransmission data packet is generated and sent based on the feedback information; and performing merging detection based on the original data packet and the retransmission data packet.
Description
Technical Field
The present application relates to the field of communications, and in particular, to an information transmission method, apparatus, terminal device, and storage medium.
Background
The HARQ mechanism is one of the important means for ensuring link reliability in a wireless communication system. The transmission delay of the data packet in the HARQ mechanism is proportional to the number of retransmissions.
In a communication system with a high round-trip delay (such as a satellite communication system), if an HARQ mechanism is adopted, if multiple retransmissions occur in the communication process, the transmission delay of a data packet will be greatly increased, and the communication experience is seriously affected.
Disclosure of Invention
The application provides an information transmission method, an information transmission device, terminal equipment and a storage medium.
In a first aspect, an embodiment of the present application provides an information transmission method, including:
receiving an original data packet of original data;
sending feedback information under the condition that the original data packet is detected wrongly, wherein the feedback information comprises retransmission control information, and the retransmission control information controls the retransmission of the original data;
receiving a retransmission data packet, wherein the retransmission data packet is generated and sent based on the feedback information;
and performing merging detection based on the original data packet and the retransmission data packet.
In a second aspect, an embodiment of the present application provides an information transmission method, including:
receiving feedback information, wherein the feedback information comprises retransmission control information, and the retransmission control information controls retransmission of original data;
and generating and sending a retransmission data packet corresponding to the original data based on the feedback information.
In a third aspect, an embodiment of the present application provides an information transmission apparatus, including:
a first receiving module configured to receive an original data packet of original data;
a sending module configured to send feedback information under the condition that the original data packet is detected incorrectly, where the feedback information includes retransmission control information that controls retransmission of the original data;
a second receiving module configured to receive a retransmission data packet, the retransmission data packet being generated and transmitted based on the feedback information;
a detection module configured to perform a merging detection based on the original data packet and the retransmitted data packet.
In a fourth aspect, an embodiment of the present application provides an information transmission apparatus, including:
a receiving module configured to receive feedback information, where the feedback information includes retransmission control information that controls retransmission of original data;
and the sending module is used for generating and sending a retransmission data packet corresponding to the original data based on the feedback information.
In a fifth aspect, an embodiment of the present application provides a terminal device, including:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement any one of the methods in the embodiments of the present application.
In a sixth aspect, the present application provides a storage medium storing a computer program, where the computer program is executed by a processor to implement any one of the methods in the embodiments of the present application.
With regard to the above embodiments and other aspects of the present application and implementations thereof, further description is provided in the accompanying drawings description, detailed description and claims.
Drawings
Fig. 1 is a schematic flow chart of an information transmission method provided in the present application;
fig. 1a is a schematic flowchart of an HARQ mechanism provided in the present application;
fig. 2 is a schematic flow chart of an information transmission method provided in the present application;
fig. 2a is a schematic flow chart of another information transmission method provided in the present application;
fig. 2b is a schematic diagram of transmitting a data packet through consecutive time domain resources according to the present application;
fig. 2c is a schematic diagram illustrating a method for transmitting a data packet through a non-consecutive time domain resource according to the present application;
fig. 2d is a schematic diagram of transmitting a data packet through consecutive frequency domain resources according to the present application;
fig. 2e is a schematic diagram of transmitting a data packet through a discontinuous frequency domain resource according to the present application;
FIG. 2f is a schematic diagram of a data packet transmitted in both time and frequency domains according to the present application;
fig. 2g is a schematic diagram of another embodiment of the present application for transmitting data packets in time domain and frequency domain;
fig. 3 is a schematic structural diagram of an information transmission apparatus provided in the present application;
fig. 4 is a schematic structural diagram of an information transmission apparatus provided in the present application;
fig. 5 is a schematic structural diagram of a terminal device provided in the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
In an exemplary embodiment, fig. 1 is a schematic flowchart of an information transmission method provided in the present application. The method can be applied to the situation of improving the transmission delay, and the method can be executed by the information transmission device provided by the application, the device can be realized by software and/or hardware and is integrated on terminal equipment, and the terminal equipment covers any type of user equipment or base station. The information transmission method can be applied to satellite communication systems and communication systems with higher requirements on time delay.
A major characteristic of satellite communication systems, which is different from terrestrial cellular systems, is that the Round-Trip Time (RTT) of the satellite communication system is very large. For a Low Earth Orbit (LEO) satellite communication system with a height of 600km, assuming that the minimum communication elevation angle is 10 degrees, the RTT value range between the satellite and the ground terminal is 4-13 ms. For Geostationary orbit (GEO) satellite communication systems, RTT values exceed 200 ms. In contrast, the RTT for terrestrial cellular networks is typically within 1 ms.
The HARQ mechanism is one of the important means for ensuring link reliability in a wireless communication system, and its basic principle is that a transmitting end transmits data to a receiving end according to a certain Modulation and Coding Scheme (MCS), and if the receiving end detects correctly, an Acknowledgement (ACK) is fed back to the transmitting end. If the receiving end detects an error, a Non-Acknowledgement (NACK) message is fed back to the transmitting end. If the sending end receives the ACK information, the new data is sent to the receiving end, and if the receiving end receives the NACK information, the original data is repeatedly sent. This step may be repeated several times until the receiving end detects the data correctly or the number of retransmissions reaches a threshold set by the system.
Fig. 1a is a schematic flowchart of an HARQ mechanism provided in the present application. Referring to fig. 1a, Packet0, Packet0, is correctly detected after being sent once, while Packet1, Packet1, is correctly detected after being sent 3 times in total. The transmission delay of the data packet is proportional to the number of retransmissions. For a satellite communication system, if a traditional HARQ mechanism is adopted, once retransmission occurs for many times, the transmission delay of a data packet is greatly increased, and the user experience is seriously affected.
In the current Non Terrestrial Network (NTN) discussion of the third Generation Partnership Project (3 GPP), it is commonly known that the conventional HARQ mechanism cannot be directly applied to a satellite communication scenario due to the problem of large delay, and a widely discussed solution is to turn off the HARQ function for a scenario with large delay. But considering that the HARQ mechanism is an important measure to guarantee link reliability, simply turning off this function brings with it a series of other problems.
As shown in fig. 1, the information transmission method provided by the present application includes S110, S120, S130, and S140.
And S110, receiving an original data packet of the original data.
The terminal device executing the information transmission method provided in this embodiment may serve as a receiving end, and the original data may be data interacted between the receiving end and the sending end, where the original data is not limited. The original packet may be considered as a transmitted packet after processing the original data. The means of processing includes encoding and packetization.
S120, sending feedback information under the condition that the original data packet is detected wrongly, wherein the feedback information comprises retransmission control information, and the retransmission control information controls the retransmission of the original data.
After receiving the original data packet, the method and the device for detecting the original data packet can detect the original data packet, and the detection means is not limited. In case of an original data packet detection error, the receiving end may send feedback information to the sending end to indicate that the receiving end received the original data packet with an error. Feedback information may be understood as information that is fed back in case a data packet, such as an original data packet or a retransmitted data packet, detects an error. The feedback information may include retransmission control information, and the retransmission control information may be information that controls the transmitting end to retransmit the original data. The transmitting end may retransmit the original data based on the retransmission control information. The content included in the retransmission control information is not limited herein, and the retransmission control information may be determined based on the received original data packet. The feedback information may be used by the transmitting end to determine the retransmission format.
In one embodiment, the feedback information may include one or more of: non-acknowledgement information, retransmission times, retransmission form information and signal to interference and noise ratio. The non-acknowledgement information is used to instruct the transmitting end to retransmit the original data. The retransmission times are the times that the original number is retransmitted by the transmitting end expected by the receiving end. The retransmission form information may indicate a transmission form in which the original data is retransmitted. The signal to interference plus noise ratio may be the signal to interference plus noise ratio.
S130, receiving a retransmission data packet, wherein the retransmission data packet is generated and sent based on the feedback information.
After sending the feedback information, the receiving end may receive a retransmission data packet sent by the sending end, where the retransmission data packet may be generated and sent based on the feedback information.
S140, merging detection is carried out based on the original data packet and the retransmission data packet.
After receiving the retransmitted data packet, the present application may perform combining detection based on the original data packet and the retransmitted data packet, and for a specific combining detection means, reference may be made to an existing means for performing processing based on the original data packet and the retransmitted data packet in HARQ, which is not limited herein.
The application provides an information transmission method, which receives an original data packet of original data; sending feedback information under the condition that the original data packet is detected wrongly, wherein the feedback information comprises retransmission control information, and the retransmission control information controls the retransmission of the original data; receiving a retransmission data packet, wherein the retransmission data packet is generated and sent based on the feedback information; the method is used for carrying out merging detection based on the original data packet and the retransmission data packet, so that the probability of transmission errors of the retransmission data packet is reduced, the transmission time delay is reduced, and the communication quality is improved.
On the basis of the above-described embodiment, a modified embodiment of the above-described embodiment is proposed, and it is to be noted herein that, in order to make the description brief, only the differences from the above-described embodiment are described in the modified embodiment.
In one embodiment, the retransmission control information includes one or more of: the number of retransmissions; signal to interference plus noise ratio.
In one embodiment, the feedback information further includes non-acknowledgement information, and the non-acknowledgement information and the retransmission control information are coded respectively and then transmitted through different channels; or, after the non-acknowledgement information and the retransmission control information are combined and coded, the non-acknowledgement information and the retransmission control information are sent through a channel.
In the case where the feedback information includes non-acknowledgement information, the non-acknowledgement information and the retransmission control information may be transmitted through different channels, or may be transmitted through one channel. For example, the non-acknowledgement information and the retransmission control information may be encoded in combination and transmitted through a physical channel.
Table 1 is a coding table for combinations of unacknowledged information and retransmission control information. Referring to table 1, the length of the code is equal to 3. 000 indicates that the receiving end feeds back ACK information, 011/110/101 indicates that the receiving end feeds back NACK information, and the expected number of retransmissions (i.e., N)repeat) 1, 2 and 3 times respectively. The remaining codewords are unused.
TABLE 1 Combined coding List of unacknowledged information and retransmission control information
| Bit field (i.e. Bitmap) | Information |
| 000 | ACK information |
| 011 | NACK and Nrepeat＝1 |
| 110 | NACK and Nrepeat＝2 |
| 101 | NACK and Nrepeat＝3 |
In one embodiment, in case the current communication network is a non-centrally controlled communication network, the retransmission control information is carried on a signaling channel or a data channel.
In one embodiment, in the case that the current communication network is a non-centrally controlled communication network, the method further includes: the retransmission form information is received through a control channel or a data channel.
In one embodiment, in case of a communication network which is centrally controlled by the current communication network, the feedback information further comprises retransmission form information, the retransmission form information and the retransmission control information being indicated by grant information.
The retransmission form information may be understood as a form indicating retransmission of the original data. In the case of a communication network that is centrally controlled by the current communication network, retransmission form information and retransmission control information may be included in the grant information. In uplink transmission, the grant information may be uplink grant information. In downlink transmission, the grant information may be downlink grant information.
In one embodiment, the retransmission form information is determined based on the retransmission control information, the retransmission form information including one or more of: modulation coding format of retransmission, resource allocation information of retransmission, retransmission times, redundancy version information of retransmission, and transmission mode of retransmission.
The retransmission form information may be determined based on the original data packet, such as determining retransmission control information based on the original data packet, and then determining retransmission form information based on the retransmission control information, where the determination manner is not limited, and different retransmission control information may have different determination manners. The retransmitted resource allocation information may indicate an allocation condition of a resource carrying the retransmitted data packet, for example, the resource carrying the retransmitted data packet is at least one of a time domain resource and a frequency domain resource; the resource for carrying the retransmission data packet is a continuous resource or a discontinuous resource.
In one embodiment, in a case that the retransmission form information includes retransmitted resource allocation information, the resource indicated by the resource allocation information is one or more of: time domain resources; frequency domain resources; a continuous resource; discontinuous resources;
under the condition that the retransmission form information comprises a retransmission modulation coding format, the retransmission modulation coding format is the same as or different from the modulation coding format of the original data packet;
and in the case that the retransmission form information includes retransmitted redundancy version information, the retransmitted redundancy version information is the same as or different from redundancy version information of the transmission original data packet.
When the number of retransmissions is at least two, the modulation and coding formats of each retransmission may be the same or different, and the redundancy version information of the retransmission may be the same or different.
Fig. 2 is a schematic flow chart of an information transmission method, which may be applicable to a situation where transmission delay is provided, and may be executed by an information transmission apparatus, which may be executed by software and/or hardware and generally integrated on a terminal device, where the terminal device may be a user equipment or a base station.
As shown in fig. 2, the information transmission method includes S210 and S220.
S210, receiving feedback information, wherein the feedback information comprises retransmission control information, and the retransmission control information controls retransmission of original data.
The terminal device executing the information transmission method of the present embodiment may be a transmitting end. The original data packet may be sent prior to receiving the feedback information.
And S220, generating and sending a retransmission data packet corresponding to the original data based on the feedback information.
Upon receiving the feedback information, a retransmission data packet may be generated based on the feedback information and then transmitted based on the feedback information.
In one embodiment, in the case that the feedback information includes the modulation and coding format of the retransmission, this step may encode the original data based on the modulation and coding format of the retransmission to generate the retransmission data packet. In the case where the feedback information includes the retransmitted redundancy version information, this step may generate a retransmission data packet based on the retransmitted redundancy version information. In the case that the feedback information includes the retransmission times, the number of the retransmission data packets generated in this step may be equal to the retransmission times, the modulation and coding formats of the retransmission of each retransmission data packet may be the same or different, and the redundancy version information of the retransmission of each retransmission data packet may be the same or different. In case the feedback information comprises a transmission mode of the retransmission, the retransmission data packet may be sent based on the transmission mode.
The application provides an information transmission method, which receives feedback information, wherein the feedback information comprises retransmission control information, and the retransmission control information controls retransmission of original data; and generating and sending a retransmission data packet corresponding to the original data based on the feedback information. The method reduces the probability of retransmission data packet transmission errors, reduces transmission time delay and improves communication quality.
On the basis of the above-described embodiment, a modified embodiment of the above-described embodiment is proposed, and it is to be noted herein that, in order to make the description brief, only the differences from the above-described embodiment are described in the modified embodiment.
In one embodiment, in a case that the current communication network is a non-centrally controlled communication network, generating and sending a retransmission data packet corresponding to the original data based on the feedback information includes: and transmitting retransmission form information through a control channel or a data channel, and generating and transmitting a retransmission data packet corresponding to the original data based on the retransmission form information and the feedback information.
Under the condition that the current communication network is a non-centrally controlled communication network, the transmitting end can determine the retransmission form and transmit the retransmission form information to the receiving end so that the receiving end can receive the retransmission data packet. The transmitting end may generate a retransmission data packet based on the retransmission form information and the feedback information. When the retransmission format information includes different contents, the manner of generating the retransmission data packet is different, and is not limited herein.
The retransmission form information may be determined based on the feedback information, and the specific determination manner is not limited herein. E.g. to determine the modulation coding format of the retransmission form information based on the signal to interference and noise ratio in the retransmission control information in the feedback information.
After the retransmission form information is determined, a retransmission data packet may be generated based on information related to the generation of the retransmission data packet in the retransmission form information and the feedback information, and the retransmission data packet may be transmitted based on information related to the transmission of the retransmission data packet in the retransmission form information and the feedback information. Such as generating a retransmitted data packet based on the retransmitted modulation coding format and the retransmitted redundancy version information. And transmitting the retransmission data packet based on the retransmission times, the retransmission resource allocation information and the retransmission transmission mode.
In one embodiment, in case of a communication network which is centrally controlled by the current communication network, the feedback information further comprises retransmission form information, the retransmission form information and the retransmission control information being indicated by grant information.
In one embodiment, the retransmission form information is determined based on the retransmission control information, the retransmission form information including one or more of: modulation coding format of retransmission, resource allocation information of retransmission, retransmission times, redundancy version information of retransmission, and transmission mode of retransmission.
In one embodiment, in a case that the retransmission form information includes retransmitted resource allocation information, the resource indicated by the resource allocation information is one or more of: time domain resources; frequency domain resources; a continuous resource; discontinuous resources;
under the condition that the retransmission form information comprises a retransmission modulation coding format, the retransmission modulation coding format is the same as or different from the modulation coding format of the original data packet;
and in the case that the retransmission form information includes retransmitted redundancy version information, the retransmitted redundancy version information is the same as or different from redundancy version information of the transmission original data packet.
The present application is described below by way of example:
the information transmission method provided by the application can be regarded as an HARQ feedback method, and in a satellite communication system, because the distance between two communication parties is long, the round-trip delay of signals is much larger than that of a ground cellular network. The traditional HARQ mechanism adopted in such a system can cause the service delay to be large, and the user experience is affected.
To solve this problem, a new Hybrid automatic repeat reQuest (HARQ) mechanism may be adopted. When the packet detection fails, the receiving end feeds back not only NACK information but also retransmission control information, such as an expected number of retransmissions, a current Signal to Interference plus noise Ratio (SINR), and the like. Through the retransmission control information, the sending end can carry out customized retransmission according to actual requirements. The receiving end can receive a plurality of retransmitted data packets or more redundant information when receiving next time, and the probability of successful detection is obviously improved, so that the number of times of HARQ signaling interaction between the transmitting end and the receiving end is reduced, the transmission delay of the data packets is reduced, and the service delay is reduced.
The control method provided by the application can be regarded as a new HARQ mechanism. In a non-central control communication network, under the condition that a receiving end and a transmitting end have no primary and secondary scores:
1. the receiving end detects the data packet sent by the sending end, and if the detection is correct, the receiving end feeds back ACK to the sending end; and if the error is detected, feeding back NACK and retransmission control information to the sending end.
The retransmission control information includes but is not limited to one or a combination of multiple information such as retransmission times expected by a receiving end, current SINR and the like;
the NACK and the retransmission control information may be encoded in combination and transmitted using one physical channel, or may be encoded separately and transmitted using different physical channels;
the retransmission control information may be carried on a signaling channel or a data channel;
2. the sending end detects the feedback information of the receiving end, and if the feedback information is ACK information, the sending end sends a new data packet to the receiving end; if the information is NACK and the retransmission control information, the sending end determines the retransmission form according to the information and informs the receiving end of the concrete retransmission form through a control channel or a data channel. The retransmitted data packet is then sent on the data channel to the receiving end.
The retransmission form includes, but is not limited to, information of MCS, resource allocation, retransmission times, redundancy version, transmission mode, etc. of retransmission.
The transmission mode includes a single-Input single-output (MIMO) mode or a Multiple-Input Multiple-output (Multiple-output-Out-put) mode.
The sending end can carry out retransmission in a time domain, can also carry out retransmission in a frequency domain, and can also carry out retransmission in a combination of the time domain and the frequency domain;
the retransmission can use the same redundancy version as the initial transmission, and can also use a redundancy version different from the initial transmission;
the retransmission may use continuous resources or discontinuous resources;
the retransmission may use the same MCS as the initial transmission (i.e., the first transmission), or may use a different MCS from the initial transmission;
when the number of retransmissions is at least two, the redundancy version and MCS for each retransmission may be the same or different.
3. And the receiving end carries out merging detection on the first transmitted data and the retransmitted data.
In a central control communication network, such as a cellular mobile communication network, the following processes are performed according to the primary and secondary receiving ends:
assume uplink transmission, i.e. the receiving end is the base station and the transmitting end is the terminal.
a) The base station detects a data packet sent by the terminal, and if the detection is correct, the base station feeds back ACK to the terminal; and if the error is detected, feeding back NACK to the terminal and indicating Uplink (UL) grant information, namely grant. The UL grant includes at least one of the following: retransmission time-frequency resources, MCS, RV version and retransmission control information, wherein the retransmission control information includes one or more of information such as retransmission times expected by a receiving end, current SINR and the like, and is not limited to the combination of the information.
b) And after receiving the UL grant, the terminal retransmits according to the instruction of the base station. And the terminal generates a retransmission packet of the original data according to the MCS and the Redundancy Version (RV), fills the retransmission packet into the specified time-frequency resource and sends the retransmission packet to the base station.
c) And the base station performs receiving detection according to the UL grant content.
Downlink transmission is assumed, i.e. the receiving end is the terminal and the transmitting end is the base station.
a) The terminal detects a data packet sent by the base station, and if the detection is correct, an ACK (acknowledgement) is fed back to the base station; and if the error is detected, feeding back NACK and retransmission control information to the base station, wherein the retransmission control information comprises one or more of information such as expected retransmission times of a receiving end, current SINR and the like, or the combination of multiple information.
b) And the base station indicates the terminal DL grant according to the retransmission control information fed back by the terminal and other possible channel quality measurements. The DL grant includes at least one of the following: time-frequency resources for retransmission (i.e., resource allocation), MCS, RV version, and repetition number. And the base station generates a retransmission packet of the original data by adopting the MCS and RV version indicated by the DL grant, fills the retransmission packet into the specified time-frequency resource and sends the retransmission packet to the terminal.
c) And after receiving the DL grant, the terminal receives retransmission data according to the instruction of the base station.
Fig. 2a is a schematic flow chart of another information transmission method provided by the present application, and referring to fig. 2a, in the diagram, a sending end sends a data packet0 to a receiving end, and the receiving end detects correctly and feeds back confirmation information to the sending end. Then the sending end sends the data packet1 to the receiving end, the receiving end fails to detect, and feeds back the non-confirmation information and the expected retransmission times N to the sending endrepeat2. After receiving the information, the sending end repeatedly sends the data packet1 to the receiving end twice, and the receiving end detects correctly. The transmitting end then continues to transmit new data packet 2 to the receiving end.
In an embodiment, after receiving the non-acknowledgement information and the expected retransmission times fed back by the receiving end, the transmitting end determines a retransmission mode and times. The method specifically adopts the following steps:
in mode 1, the sending end repeatedly sends the original data packet in the time domain. The resources used may be continuous or discontinuous, and the same redundancy version or different redundancy versions may be used for each retransmission. Fig. 2b is a schematic diagram of transmitting a data packet through a continuous time domain resource according to the present application, and fig. 2c is a schematic diagram of transmitting a data packet through a discontinuous time domain resource according to the present application, see fig. 2b and fig. 2c, where N isrepeatFig. 2b sends packet1 and packet 2 using consecutive resources, the same redundancy version, i.e. RV0Packet 2; fig. 2c uses discontinuous resources, different redundancy versions, i.e., RV2 and RV 3. Packet1 and packet 2 in this example are only used to distinguish between the retransmitted packet sent the first time, i.e. repeat1 and the retransmitted packet sent the second time, repeat 2.
In mode 2, the transmitting end repeatedly transmits the original data packet in the frequency domain. The resources used may be continuous or discontinuous, and the same redundancy version or different redundancy versions may be used for each retransmission. Fig. 2d is a schematic diagram of transmitting a data packet through continuous frequency domain resources according to the present application, and fig. 2e is a schematic diagram of transmitting a data packet through discontinuous frequency domain resources according to the present application. Referring to FIGS. 2d and 2e, NrepeatFig. 2d uses contiguous resources, different redundancy versions, i.e. RV1 and RV 2; fig. 2e uses a discontinuous resource, the same redundancy version, RV 0.
In mode 3, the sending end repeatedly sends the original data packet in the time domain and the frequency domain. Retransmissions may use the same redundancy version or different redundancy versions. Fig. 2f is a schematic diagram of transmitting a data packet through time and frequency domains according to the present application, and fig. 2g is a schematic diagram of transmitting a data packet through time and frequency domains according to the present application. Referring to FIGS. 2f and 2g, NrepeatFig. 2f uses the same redundancy version, i.e., RV 0; fig. 2g uses different redundancy versions, namely RV1, RV2 and RV 3.
In uplink transmission, that is, when the receiving end is a base station and the transmitting end is a terminal, the base station detects a packet error sent by the terminal, feeds back NACK to the terminal, and indicates a UL grant. The UL grant includes: time frequency resource, MCS, RV version and repetition times of retransmission.
In the mode 1, the base station indicates 1 initial RV version, the terminal generates retransmission packets of a plurality of RV versions according to a given MCS and the repetition times, places the retransmission packets in a given time-frequency resource and sends the retransmission packets to the base station. Multiple RV versions may be selected cyclically from among the RV versions agreed or indicated in advance, starting from the starting RV version. Exemplary, pre-agreed upon RV versions include RV0, RV3, RV1, and RV 2. The starting RV version indicated by the base station is RV1, the repetition number is 3, and the terminal may select 3 RV versions, that is, RV1, RV2, and RV0, from RV1 according to the sequence of RV0, RV3, RV1, and RV 2. The retransmission packet is generated based on RV1, RV2, and RV0 and a given MCS.
And in the mode 2, the base station indicates 1 RV version, the terminal generates a retransmission packet of the same RV version according to the given MCS and the repetition times, places the retransmission packet in the given time-frequency resource and sends the retransmission packet to the base station.
In the mode 3, the base station does not indicate the RV version, and the terminal generates a retransmission packet of the RV version identical to the RV version transmitted last time (e.g., first transmission) according to the given MCS and the repetition number, places the retransmission packet in the given time-frequency resource, and transmits the retransmission packet to the base station.
And the base station performs receiving detection according to the UL grant content.
In downlink transmission, namely under the condition that a receiving end is a terminal and a sending end is a base station, the terminal detects a data packet sent by the base station, and if the detection is correct, an ACK (acknowledgement character) is fed back to the base station; a NACK is fed back to the base station if an error is detected and contains the desired number of repetitions.
The base station indicates the DL grant to the terminal according to the expected number of repetitions fed back by the terminal, and possibly other channel quality measurements. The DL grant includes at least one of the following: time frequency resource, MCS, RV version and repetition times of retransmission.
In the mode 1, the base station indicates 1 RV initial version, generates retransmission packets of a plurality of RV versions according to the indicated MCS and the repetition times, places the retransmission packets in the given time frequency resource, and sends the retransmission packets to the terminal.
And in the mode 2, the base station indicates 1 RV version, generates a retransmission packet of the same RV version according to the indicated MCS and the repetition times, places the retransmission packet in the given time frequency resource and sends the retransmission packet to the terminal.
And in the mode 3, the base station does not indicate the RV version, generates a retransmission packet of the RV version which is the same as the RV version transmitted last time according to the indicated MCS and the repetition times, places the retransmission packet in the given time-frequency resource and sends the retransmission packet to the terminal.
And after receiving the DL grant, the terminal receives retransmission data according to the instruction of the base station.
When the data packet detection is wrong, the method and the device feed back NACK information and expected retransmission time information. The retransmission control information includes but is not limited to one or a combination of multiple information such as retransmission times expected by a receiving end, current SINR and the like; the NACK and the retransmission control information may be encoded in combination and transmitted using one physical channel, or may be encoded separately and transmitted using different physical channels; the retransmission control information may be carried on a signaling channel or a data channel.
In a non-central control communication network, under the condition that a receiving end and a transmitting end have no primary and secondary scores: the sending end detects the feedback information of the receiving end, if the feedback information is NACK and the retransmission control information, the sending end determines the retransmission form and times according to the information, informs the receiving end of the retransmission form and times, and then retransmits the original data packet to the receiving end. And the receiving end combines and detects the first transmission data and the retransmission data.
The retransmission form includes and is not limited to information of retransmission MCS, resource allocation, retransmission times, redundancy version, transmission mode and the like; the sending end can carry out retransmission in a time domain, can also carry out retransmission in a frequency domain, and can also carry out retransmission in a combination of the time domain and the frequency domain; the retransmission can use the same redundancy version, and can also use different redundancy versions; the retransmission may use continuous resources or discontinuous resources; the retransmission may use the same MCS as the initial transmission or may use a different MCS.
In a centrally controlled communication network, a transmitting/receiving end (base station) under central control determines a retransmission form according to the retransmission control information fed back by the terminal to the downlink or the uplink receiving condition of the base station, and informs the terminal. The retransmission format includes at least: time frequency resource, MCS, RV version and repetition times of retransmission.
Fig. 3 is a schematic structural diagram of an information transmission apparatus that can execute the method shown in fig. 1 and is integrated on a terminal device. The device includes: a first receiving module 31 configured to receive an original data packet of original data; a sending module 32, configured to send feedback information when the original data packet is detected incorrectly, where the feedback information includes retransmission control information that controls retransmission of the original data; a second receiving module 33 configured to receive a retransmission data packet, where the retransmission data packet is generated and sent based on the feedback information; a detection module 34 configured to perform merging detection based on the original data packet and the retransmitted data packet.
The information transmission apparatus provided in this embodiment is used to implement the information transmission method according to the embodiment shown in fig. 1, and the implementation principle and technical effect of the information transmission apparatus provided in this embodiment are similar to those of the information transmission method according to the embodiment shown in fig. 1, and are not described herein again.
On the basis of the above-described embodiment, a modified embodiment of the above-described embodiment is proposed, and it is to be noted herein that, in order to make the description brief, only the differences from the above-described embodiment are described in the modified embodiment.
In one embodiment, the retransmission control information includes one or more of: the number of retransmissions; signal to interference plus noise ratio.
In one embodiment, the feedback information further includes non-acknowledgement information, and the non-acknowledgement information and the retransmission control information are coded respectively and then transmitted through different channels; or, after the non-acknowledgement information and the retransmission control information are combined and coded, the non-acknowledgement information and the retransmission control information are sent through a channel.
In one embodiment, in case the current communication network is a non-centrally controlled communication network, the retransmission control information is carried on a signaling channel or a data channel.
In one embodiment, in the case that the current communication network is a non-centrally controlled communication network, the method further includes: the retransmission form information is received through a control channel or a data channel.
In one embodiment, in case of a communication network which is centrally controlled by the current communication network, the feedback information further comprises retransmission form information, the retransmission form information and the retransmission control information being indicated by grant information.
In one embodiment, the retransmission form information is determined based on the retransmission control information, the retransmission form information including one or more of: modulation coding format of retransmission, resource allocation information of retransmission, retransmission times, redundancy version information of retransmission, and transmission mode of retransmission.
In one embodiment, in a case that the retransmission form information includes retransmitted resource allocation information, the resource indicated by the resource allocation information is one or more of: time domain resources; frequency domain resources; a continuous resource; discontinuous resources;
under the condition that the retransmission form information comprises a retransmission modulation coding format, the retransmission modulation coding format is the same as or different from the modulation coding format of the original data packet;
and in the case that the retransmission form information includes retransmitted redundancy version information, the retransmitted redundancy version information is the same as or different from redundancy version information of the transmission original data packet.
Fig. 4 is a schematic structural diagram of an information transmission apparatus that can execute the method shown in fig. 2 and is integrated on a terminal device. The device includes: a receiving module 41 configured to receive feedback information, where the feedback information includes retransmission control information, and the retransmission control information controls retransmission of original data; and the sending module 42 is configured to generate and send a retransmission data packet corresponding to the original data based on the feedback information.
The information transmission apparatus provided in this embodiment is used to implement the information transmission method according to the embodiment shown in fig. 2, and the implementation principle and technical effect of the information transmission apparatus provided in this embodiment are similar to those of the information transmission method according to the embodiment shown in fig. 2, and are not described herein again.
On the basis of the above-described embodiment, a modified embodiment of the above-described embodiment is proposed, and it is to be noted herein that, in order to make the description brief, only the differences from the above-described embodiment are described in the modified embodiment.
In one embodiment, in the case that the current communication network is a non-centrally controlled communication network, the sending module 42 is configured to: and transmitting retransmission form information through a control channel or a data channel, and generating and transmitting a retransmission data packet corresponding to the original data based on the retransmission form information and the feedback information.
In one embodiment, in case of a communication network which is centrally controlled by the current communication network, the feedback information further comprises retransmission form information, the retransmission form information and the retransmission control information being indicated by grant information.
In one embodiment, the retransmission form information is determined based on the retransmission control information, the retransmission form information including one or more of: modulation coding format of retransmission, resource allocation information of retransmission, retransmission times, redundancy version information of retransmission, and transmission mode of retransmission.
In one embodiment, in a case that the retransmission form information includes retransmitted resource allocation information, the resource indicated by the resource allocation information is one or more of: time domain resources; frequency domain resources; a continuous resource; discontinuous resources;
under the condition that the retransmission form information comprises a retransmission modulation coding format, the retransmission modulation coding format is the same as or different from the modulation coding format of the original data packet;
and in the case that the retransmission form information includes retransmitted redundancy version information, the retransmitted redundancy version information is the same as or different from redundancy version information of the transmission original data packet.
An embodiment of the present application provides a terminal device, and fig. 5 is a schematic structural diagram of a terminal device provided in the present application. As shown in fig. 5, the terminal device provided by the present application includes one or more processors 51 and a storage 52; the number of the processors 51 in the terminal device may be one or more, and one processor 51 is taken as an example in fig. 5; storage 52 is used to store one or more programs; the one or more programs are executed by the one or more processors 51, so that the one or more processors 51 implement the methods as described in the embodiments of the present application.
The terminal device further includes: a communication device 53, an input device 54 and an output device 55.
The processor 51, the storage device 52, the communication device 53, the input device 54 and the output device 55 in the terminal equipment may be connected by a bus or other means, and the connection by the bus is exemplified in fig. 5.
The input device 54 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function controls of the terminal device. The output device 55 may include a display device such as a display screen.
The communication means 53 may comprise a receiver and a transmitter. The communication device 53 is configured to perform information transceiving communication according to the control of the processor 51. The information includes, but is not limited to, original data packets, retransmitted data packets, feedback information, and/or retransmission form information.
The storage device 52, which is a computer-readable storage medium, may be configured to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the information transmission method according to the embodiments of the present application (for example, the first receiving module 31, the sending module 32, the second receiving module 33, and the detecting module 34 in the information transmission device, or the receiving module 41 and the sending module 42 in the information transmission device). The storage device 52 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the storage 52 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the storage 52 may further include memory located remotely from the processor 51, which may be connected to the terminal device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The embodiment of the present application further provides a storage medium, where a computer program is stored, and when the computer program is executed by a processor, the information transmission method in any one of the embodiments of the present application is implemented.
The information transmission method comprises the following steps: receiving an original data packet of original data;
sending feedback information under the condition that the original data packet is detected wrongly, wherein the feedback information comprises retransmission control information, and the retransmission control information controls the retransmission of the original data;
receiving a retransmission data packet, wherein the retransmission data packet is generated and sent based on the feedback information;
and performing merging detection based on the original data packet and the retransmission data packet.
Or, the information transmission method comprises:
receiving feedback information, wherein the feedback information comprises retransmission control information, and the retransmission control information controls retransmission of original data;
and generating and sending a retransmission data packet corresponding to the original data based on the feedback information.
The computer storage media of the embodiments of the present application may take any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), a flash Memory, an optical fiber, a portable CD-ROM, an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. A computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take a variety of forms, including, but not limited to: an electromagnetic signal, an optical signal, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, Radio Frequency (RF), etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + +, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
The above description is only exemplary embodiments of the present application, and is not intended to limit the scope of the present application.
It will be clear to a person skilled in the art that the term terminal equipment covers any suitable type of wireless user equipment, such as mobile phones, portable data processing devices, portable web browsers or vehicle-mounted mobile stations.
In general, the various embodiments of the application may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the application is not limited thereto.
Embodiments of the application may be implemented by a data processor of a mobile device executing computer program instructions, for example in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, Instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.
Any logic flow block diagrams in the figures of this application may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on a memory. The Memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, Read-Only Memory (ROM), Random Access Memory (RAM), optical storage devices and systems (Digital Video Disc (DVD) or Compact Disc (CD)), etc. The computer readable medium may include a non-transitory storage medium. The data processor may be of any type suitable to the local technical environment, such as but not limited to general purpose computers, special purpose computers, microprocessors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Programmable logic devices (FGPAs), and processors based on a multi-core processor architecture.
The foregoing has provided by way of exemplary and non-limiting examples a detailed description of exemplary embodiments of the present application. Various modifications and adaptations to the foregoing embodiments may become apparent to those skilled in the relevant arts in view of the drawings and the following claims without departing from the scope of the invention. Accordingly, the proper scope of the application is to be determined according to the claims.
Claims (17)
1. An information transmission method, comprising:
receiving an original data packet of original data;
sending feedback information under the condition that the original data packet is detected wrongly, wherein the feedback information comprises retransmission control information, and the retransmission control information controls the retransmission of the original data;
receiving a retransmission data packet, wherein the retransmission data packet is generated and sent based on the feedback information;
and performing merging detection based on the original data packet and the retransmission data packet.
2. The method of claim 1, wherein the retransmission control information comprises one or more of: the number of retransmissions; signal to interference plus noise ratio.
3. The method of claim 1, wherein the feedback information further includes non-acknowledgement information, and the non-acknowledgement information and the retransmission control information are coded separately and then transmitted through different channels; or, after the non-acknowledgement information and the retransmission control information are combined and coded, the non-acknowledgement information and the retransmission control information are sent through a channel.
4. The method of claim 1, wherein the retransmission control information is carried on a signaling channel or a data channel in case the current communication network is a non-centrally controlled communication network.
5. The method of claim 1, wherein in the case that the current communication network is a non-centrally controlled communication network, further comprising:
the retransmission form information is received through a control channel or a data channel.
6. The method according to claim 1, wherein in case of a communication network which is centrally controlled by a current communication network, the feedback information further comprises retransmission form information, the retransmission form information and the retransmission control information being indicated by grant information.
7. The method according to claim 5 or 6, wherein the retransmission form information is determined based on the retransmission control information, the retransmission form information comprising one or more of: modulation coding format of retransmission, resource allocation information of retransmission, retransmission times, redundancy version information of retransmission, and transmission mode of retransmission.
8. The method of claim 7,
in a case that the retransmission form information includes retransmitted resource allocation information, the resource indicated by the resource allocation information is one or more of: time domain resources; frequency domain resources; a continuous resource; discontinuous resources;
under the condition that the retransmission form information comprises a retransmission modulation coding format, the retransmission modulation coding format is the same as or different from the modulation coding format of the original data packet;
and in the case that the retransmission form information includes retransmitted redundancy version information, the retransmitted redundancy version information is the same as or different from redundancy version information of the transmission original data packet.
9. An information transmission method, comprising:
receiving feedback information, wherein the feedback information comprises retransmission control information, and the retransmission control information controls retransmission of original data;
and generating and sending a retransmission data packet corresponding to the original data based on the feedback information.
10. The method of claim 9,
when the current communication network is a non-centrally controlled communication network, generating and sending a retransmission data packet corresponding to the original data based on the feedback information, including: and transmitting retransmission form information through a control channel or a data channel, and generating and transmitting a retransmission data packet corresponding to the original data based on the retransmission form information and the feedback information.
11. The method according to claim 9, wherein in case of a communication network which is centrally controlled by a current communication network, the feedback information further comprises retransmission form information, the retransmission form information and the retransmission control information being indicated by grant information.
12. The method according to claim 10 or 11, wherein the retransmission form information is determined based on the retransmission control information, the retransmission form information comprising one or more of: modulation coding format of retransmission, resource allocation information of retransmission, retransmission times, redundancy version information of retransmission, and transmission mode of retransmission.
13. The method of claim 12,
in a case that the retransmission form information includes retransmitted resource allocation information, the resource indicated by the resource allocation information is one or more of: time domain resources; frequency domain resources; a continuous resource; discontinuous resources;
under the condition that the retransmission form information comprises a retransmission modulation coding format, the retransmission modulation coding format is the same as or different from the modulation coding format of the original data packet;
and in the case that the retransmission form information includes retransmitted redundancy version information, the retransmitted redundancy version information is the same as or different from redundancy version information of the transmission original data packet.
14. An information transmission apparatus, comprising:
a first receiving module configured to receive an original data packet of original data;
a sending module configured to send feedback information under the condition that the original data packet is detected incorrectly, where the feedback information includes retransmission control information that controls retransmission of the original data;
a second receiving module configured to receive a retransmission data packet, the retransmission data packet being generated and transmitted based on the feedback information;
a detection module configured to perform a merging detection based on the original data packet and the retransmitted data packet.
15. An information transmission apparatus, comprising:
a receiving module configured to receive feedback information, where the feedback information includes retransmission control information that controls retransmission of original data;
and the sending module is used for generating and sending a retransmission data packet corresponding to the original data based on the feedback information.
16. A terminal device, comprising:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the method of any one of claims 1-13.
17. A storage medium, characterized in that the storage medium stores a computer program which, when executed by a processor, implements the method of any one of claims 1-13.
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| CN201911400178.4A CN111092699A (en) | 2019-12-30 | 2019-12-30 | Information transmission method, device, terminal equipment and storage medium |
| PCT/CN2020/125870 WO2021135616A1 (en) | 2019-12-30 | 2020-11-02 | Information transmission method and apparatus, terminal device and storage medium |
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| CN201911400178.4A CN111092699A (en) | 2019-12-30 | 2019-12-30 | Information transmission method, device, terminal equipment and storage medium |
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| WO2022006822A1 (en) * | 2020-07-09 | 2022-01-13 | 北京小米移动软件有限公司 | Data transmission method and apparatus based on satellite communication, and storage medium |
| WO2022011655A1 (en) * | 2020-07-16 | 2022-01-20 | 北京小米移动软件有限公司 | Retransmission request method and apparatus, and retransmitted data reception method and apparatus |
| CN117856983A (en) * | 2024-03-06 | 2024-04-09 | 广东世炬网络科技有限公司 | Data packet retransmission mode self-adaptive adjustment method and device based on NTN network transmission |
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| CN109952779A (en) * | 2016-11-02 | 2019-06-28 | 华为技术有限公司 | System and method for reliable transmission in communication system |
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| WO2021135616A1 (en) * | 2019-12-30 | 2021-07-08 | 中兴通讯股份有限公司 | Information transmission method and apparatus, terminal device and storage medium |
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| WO2021135616A1 (en) | 2021-07-08 |
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Application publication date: 20200501 |