CN106954276B - Method, device and system for retransmission scheduling - Google Patents
Method, device and system for retransmission scheduling Download PDFInfo
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- CN106954276B CN106954276B CN201710131533.7A CN201710131533A CN106954276B CN 106954276 B CN106954276 B CN 106954276B CN 201710131533 A CN201710131533 A CN 201710131533A CN 106954276 B CN106954276 B CN 106954276B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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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
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/20—Control channels or signalling for resource management
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Abstract
The application discloses a method for retransmission scheduling, which comprises the following steps: a base station sends first data to a first terminal; the base station receives a negative response message sent by the first terminal, wherein the negative response message is sent by the first terminal when the first data cannot be successfully demodulated, the negative response message carries retransmission indication information, and the retransmission indication information is used for indicating information which needs to be retransmitted by the base station; and the base station determines retransmission resources according to the retransmission indication information, schedules data needing to be retransmitted in the first data on the retransmission resources, and can also schedule second data on the residual resources except the retransmission resources. The retransmission scheduling method can determine retransmission resources according to the retransmission indication information of the terminal, and then perform retransmission scheduling on the retransmission resources, so that the accuracy of the use of the retransmission resources is improved. And the second data can be scheduled by using the residual resources, so that the utilization rate of the transmission resources is further improved. The embodiment of the application also provides a corresponding base station and a wireless communication system.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method, a device, and a system for scheduling retransmission.
Background
In order to reduce the effect of such transmission errors, a Hybrid Automatic Repeat Request (HARQ) mechanism is introduced into a Long Term Evolution (LTE) system, and an HARQ mechanism is introduced first:
HARQ: hybrid Automatic Repeat Request (harq) is to introduce a Forward Error Correction (FEC) subsystem into an ARQ system, so that errors are automatically corrected within a certain Error Correction capability range at a receiving end, and a transmitting end is required to retransmit if the Error Correction capability exceeds the Error Correction range, thereby increasing the reliability of the system and improving the transmission efficiency of the system.
In the prior art, during HARQ retransmission, a sending end usually estimates resources required by data to be retransmitted and then retransmits the data, and such a retransmission resource estimation method has low accuracy.
Disclosure of Invention
The embodiment of the application provides a retransmission scheduling method, which can determine retransmission resources according to retransmission indication information of a terminal, and then perform retransmission scheduling on the retransmission resources, so that the accuracy of the use of the retransmission resources is improved. The embodiment of the application also provides corresponding equipment and a corresponding system.
A first aspect of the present application provides a retransmission scheduling method, which is applied to a wireless communication system, where the wireless communication system may be a wireless communication system such as a fifth generation mobile communication 5G, a Long Term Evolution (LTE), a Wideband Code Division Multiple Access (WCDMA), a time Division-synchronous Code Division Multiple Access (td-scdma), and a Worldwide Interoperability for Microwave Access (WIMAX). The method comprises the following steps: a base station sends first data to a first terminal; the base station receives a negative response message sent by the first terminal, wherein the negative response message is sent by the first terminal when the first data cannot be successfully demodulated, the negative response message carries retransmission indication information, and the retransmission indication information is used for indicating information which needs to be retransmitted by the base station; and the base station determines retransmission resources according to the retransmission indication information and schedules the data needing to be retransmitted in the first data on the retransmission resources. As can be seen from the above first aspect, the retransmission scheduling method provided in the first aspect of the present application may determine retransmission resources according to the retransmission indication information of the terminal, and then perform retransmission scheduling on the retransmission resources, so as to improve the accuracy of the use of the retransmission resources.
With reference to the first aspect, in a first possible implementation manner, the method for scheduling retransmission further includes: the base station determines the residual resources according to the retransmission resources and the resources for sending the first data for the first time; and the base station schedules second data on the residual resources, wherein the second data comprises at least one new transmission data and/or at least one retransmission data. As can be seen from the first possible implementation manner of the first aspect, the retransmitted residual resource is used to schedule a new data to the first terminal or the second terminal, so that the residual resource during retransmission is fully utilized, and the utilization rate of the resource is improved.
With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, when the retransmission indication information is resource indication information that is required to be occupied by data that needs to be retransmitted, the determining, by the base station, retransmission resources according to the retransmission indication information includes: determining retransmission resources according to resource indication information required to be occupied by data needing to be retransmitted; the resource indication information includes a value, a ratio or first quantization indication information of a frequency domain resource required for retransmitting data required to be retransmitted, or a value, a ratio or second quantization indication information of a time domain resource required for retransmitting data required to be retransmitted, the first quantization indication information is indication information of the value or the ratio of the frequency domain resource, and the second quantization indication information is indication information of the value or the ratio of the time domain resource. As can be seen from the second possible implementation manner of the first aspect, the retransmission resource is determined according to the resource indication information occupied by the data to be retransmitted, and the retransmission resource can be accurately determined, so that the accuracy of the use of the retransmission resource is improved.
With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner, when the resource indication information is the first quantized indication information or the second quantized indication information, the determining, by the base station, retransmission resources according to the resource indication information that needs to be occupied by data that needs to be retransmitted includes: determining the frequency domain resources corresponding to the first quantization indication information according to the corresponding relation between the frequency domain quantization indication information and the frequency domain resources, and determining the corresponding frequency domain resources as retransmission resources; or determining the time domain resource corresponding to the second quantization indication information according to the corresponding relation between the time domain quantization indication information and the frequency domain resource, and determining the corresponding time domain resource as the retransmission resource. As can be seen from the third possible implementation manner of the first aspect, the retransmission resource is determined by the quantization indicating information, and the number of bytes occupied by the quantization indicating information is small, so that the transmission resource can be further saved by using the quantization indicating information.
With reference to the first aspect or the first possible implementation manner of the first aspect, in a fourth possible implementation manner, when the retransmission indication information is indication information of data that needs to be retransmitted, the determining, by the base station, retransmission resources according to the retransmission indication information includes: and determining retransmission resources required by retransmitting the data needing to be retransmitted according to the indication information of the data needing to be retransmitted. As can be seen from the fourth possible implementation manner of the first aspect, the amount of data to be retransmitted can be accurately determined according to the indication information of the data to be retransmitted, so that the retransmission resource can be accurately determined.
With reference to the first possible implementation manner of the first aspect, in a fifth possible implementation manner, the second data is data scheduled to the first terminal or data scheduled to the second terminal, and the second terminal is at least one terminal of other terminals except the first terminal in the multi-user scenario. As can be seen from the fifth possible implementation manner of the first aspect, retransmission scheduling is applicable in both single-user scenarios and multi-user scenarios, and not only can newly transmitted data of a first terminal be scheduled, but also newly transmitted data of a second terminal can be scheduled.
With reference to the first possible implementation manner of the first aspect, in a fifth possible implementation manner, the second data includes one or more newly transmitted data scheduled to the first terminal, and the one or more newly transmitted data are scheduled by the base station to be transmitted on the same carrier.
With reference to the first possible implementation manner of the first aspect, in a fifth possible implementation manner, the first data and the second data use different buffers in the same HARQ process for transmission, or the first data and the second data use different HARQ processes for transmission.
The second aspect of the present application provides a method for scheduling retransmission, which is applied to a wireless communication system, where the wireless communication system may be a wireless communication system such as 5G, LTE, WCDMA, td-scdma and WIMAX for fifth generation mobile communication. The method comprises the following steps: a terminal receives first data sent by a base station; the terminal demodulates the first data; and when the terminal does not successfully demodulate the first data, sending a negative response message to the base station, wherein the negative response message carries retransmission indication information, and the retransmission indication information is used for indicating information which needs to be retransmitted by the base station, so that the base station determines retransmission resources according to the retransmission indication information and schedules data which needs to be retransmitted in the first data on the retransmission resources. As can be seen from the second aspect, in the method for scheduling retransmission provided in the second aspect of the present application, when the terminal does not successfully demodulate the first data sent by the base station, the terminal sends, according to the demodulated condition, retransmission indication information of the data that has not been demodulated, to the base station, so that the base station can determine retransmission resources according to the retransmission indication information of the terminal, and then performs retransmission scheduling on the retransmission resources, thereby improving the accuracy of using the retransmission resources.
With reference to the second aspect, in a first possible implementation manner, the method further includes: and receiving retransmission data in the first data scheduled by the base station, and receiving second data scheduled by the base station on the remaining resources except the retransmission resources, wherein the second data comprises at least one new transmission data and/or at least one retransmission data. As can be seen from the first possible implementation manner of the second aspect, the terminal may receive the newly transmitted data again on the resource for receiving and sending the retransmitted data, and fully utilize the remaining resources during retransmission, thereby improving the utilization rate of the resources.
With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, the retransmission indication information includes resource indication information that needs to be occupied by data that needs to be retransmitted or indication information of data that needs to be retransmitted; the resource indication information comprises a numerical value, a proportion or first quantization indication information of a frequency domain resource required by retransmitting data needing to be retransmitted, or a numerical value, a proportion or second quantization indication information of a time domain resource required by retransmitting the data needing to be retransmitted, wherein the first quantization indication information is indication information of the numerical value or the proportion of the frequency domain resource, and the second quantization indication information is indication information of the numerical value or the proportion of the time domain resource; the indication information of the data needing to be retransmitted comprises redundancy version indication information needing to be retransmitted and modulation information of the data needing to be retransmitted. As can be seen from the second possible implementation manner of the first aspect, the retransmission indication information has multiple possible forms, and each possible form can accurately determine the retransmission resource, so that the accuracy of the use of the retransmission resource is improved.
A third aspect of the present application provides a base station, where the base station is configured to implement the functions of the method provided in the first aspect or any optional implementation manner of the first aspect, and the base station is implemented by hardware/software, where the hardware/software includes units corresponding to the functions.
A fourth aspect of the present application provides a base station, configured to implement the functions of the method provided in any of the second aspect or the optional implementation manners of the second aspect, where the base station is implemented by hardware/software, and the hardware/software includes units corresponding to the functions.
A fifth aspect of the present application provides a wireless communication system, comprising: a base station as described in the third aspect and a terminal as described in the fourth aspect.
A further aspect of the present application provides a computer-readable storage medium having stored therein instructions, which, when run on a computer, cause the computer to execute a program of retransmission scheduling according to the first aspect or any one of the alternative implementations of the first aspect.
A further aspect of the present application provides a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of retransmission scheduling of the first aspect or any of the alternative implementations of the first aspect.
Compared with the low accuracy of the retransmission resources pre-estimated by the base station in the prior art, the retransmission scheduling method provided by the embodiment of the application can determine the retransmission resources according to the retransmission indication information of the terminal, and then performs retransmission scheduling on the retransmission resources, so that the accuracy of the use of the retransmission resources is improved.
Drawings
Fig. 1 is a schematic diagram of an embodiment of a wireless communication system in an embodiment of the present application;
fig. 2 is a schematic diagram of an embodiment of a method for scheduling retransmission in an embodiment of the present application;
fig. 3 is a schematic diagram of another embodiment of a method for scheduling retransmission in an embodiment of the present application;
fig. 4 is a schematic diagram illustrating an example scenario of retransmission scheduling on frequency domain resources in an embodiment of the present application;
FIG. 5 is a diagram illustrating an example of a scenario of retransmission scheduling on time domain resources in an embodiment of the present application;
fig. 6 is a schematic diagram of an embodiment of a base station in the embodiment of the present application;
fig. 7 is a schematic diagram of an embodiment of a terminal in the embodiment of the present application;
fig. 8 is a schematic diagram of another embodiment of the base station in the embodiment of the present application;
fig. 9 is a schematic diagram of another embodiment of the terminal in the embodiment of the present application.
Detailed Description
Embodiments of the present application will now be described with reference to the accompanying drawings, and it is to be understood that the described embodiments are merely illustrative of some, but not all, embodiments of the present application. As can be appreciated by those skilled in the art, with the development of communication technology, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
The embodiment of the application provides a retransmission scheduling method, which can determine retransmission resources according to retransmission indication information of a terminal, and then perform retransmission scheduling on the retransmission resources, so that the accuracy of the use of the retransmission resources is improved. The embodiment of the application also provides corresponding equipment and a corresponding system.
Fig. 1 is a schematic diagram of an embodiment of a wireless communication system according to the present invention. The wireless communication system may be a fifth generation mobile communication system 5G, a Long Term Evolution (LTE), a Wideband Code Division Multiple Access (WCDMA), a time Division-synchronous Code Division Multiple Access (td-scdma), a Worldwide Interoperability for Microwave Access (WIMAX), or other wireless communication systems.
As shown in fig. 1, an embodiment of a wireless communication system provided in the embodiment of the present application includes: a base station and a plurality of terminals. The base station can wirelessly communicate with any terminal, if the terminal cannot successfully demodulate data sent by the base station, the terminal needs to send a Negative Acknowledgement (NACK) message to the base station, and the base station can perform HARQ retransmission after receiving the NACK message.
In the scheme of retransmission scheduling provided by the embodiment of the application, a NACK message sent by a terminal to a base station includes retransmission indication information, the base station determines retransmission resources according to the retransmission indication information, and schedules data to be retransmitted in the first data on the retransmission resources.
The process may also be understood with reference to fig. 2, and as shown in fig. 2, an embodiment of the method for scheduling retransmission according to the embodiment of the present application includes:
101. the base station transmits first data to the first terminal.
102. The first terminal demodulates the first data.
103. And when the first terminal does not successfully demodulate the first data, sending a negative response message to the base station, wherein the negative response message carries retransmission indication information, and the retransmission indication information is used for indicating information which needs to be retransmitted by the base station.
104. And after receiving the negative response message sent by the first terminal, the base station determines retransmission resources according to the retransmission indication information.
105. And the base station schedules the data needing to be retransmitted in the first data on the retransmission resources.
Compared with the low accuracy of the retransmission resources pre-estimated by the base station in the prior art, the retransmission scheduling method provided by the embodiment of the application can determine the retransmission resources according to the retransmission indication information of the terminal, and then performs retransmission scheduling on the retransmission resources, so that the accuracy of the use of the retransmission resources is improved.
Since the total amount of resources at each HARQ retransmission is the same as the resources at the time of first transmission of the first data, there will be remaining resources when the data to be retransmitted is larger than the number of bytes of the first data. For the use of the remaining resources, the present application provides another embodiment of a method for scheduling retransmission.
As shown in fig. 3, another embodiment of the method for scheduling retransmission provided in the embodiment of the present application includes:
the 201-205 is the same as the 101-105, and it can be understood by referring to the 101-105, and the description is not repeated herein.
206. And the base station determines the residual resources according to the retransmission resources and the resources for sending the first data for the first time.
207. And the base station schedules the second data on the residual resources.
Wherein the second data comprises at least one new transmission data and/or at least one retransmission data.
In this embodiment of the present application, the second data may include one or more newly transmitted data, may also include one or more retransmitted data, and may also include both retransmitted data and newly transmitted data, where the number of the retransmitted data and the newly transmitted data is not limited in this application, and may be one or multiple.
The second data is data scheduled to the first terminal or data scheduled to a second terminal, and the second terminal is at least one terminal of other terminals except the first terminal in a multi-user scene.
In the embodiment of the present application, in a single-user scenario, the second data is scheduled to the first terminal, and in a multi-user scenario, the second data may be scheduled to one or more second terminals.
In the embodiment of the application, the retransmitted residual resource is used for scheduling a new data to the first terminal or the second terminal, so that the residual resource in retransmission is fully utilized, and the utilization rate of the resource is improved.
In the embodiment of the present application, the retransmission indication information may be resource indication information that needs to be occupied by data that needs to be retransmitted, or may also be indication information of data that needs to be retransmitted.
The resource indication information that needs to be occupied by the data that needs to be retransmitted may be frequency domain resource information, for example: and the value and the proportion of the frequency domain resources required by retransmission or the quantization indication information of the value and the proportion of the frequency domain resources. In the present application, the quantization indicating information of the numerical value and the ratio of the frequency domain resource is defined as the first quantization indicating information. Frequency domain resources are for example: may be a Physical Resource Block (PRB).
The resource indication information required to be occupied by the data that needs to be retransmitted may also be time domain resource information, for example: and the numerical value and the proportion of the time domain resources required by retransmission or the quantitative indication information of the numerical value and the proportion of the time domain resources. In the present application, the quantization indicating information of the numerical value and the ratio of the time domain resource is defined as the second quantization indicating information. Time domain resources are for example: symbols, slots (slots), Transmission Time Intervals (TTIs), etc.
The indication information of the data that needs to be retransmitted may be modulation indication information that needs to be retransmitted, redundancy version indication information that needs to be retransmitted, Signal to Interference Noise Ratio (SINR), and the like.
When the retransmission indication information is resource indication information that is required to be occupied by the data that needs to be retransmitted, the determining, by the base station, retransmission resources according to the retransmission indication information may include:
and determining the retransmission resources according to the resource indication information occupied by the data needing to be retransmitted.
When the retransmission indication information is frequency domain resource indication information, for example, the retransmission resource required by the data that needs to be retransmitted is 30PRB, it may be determined that the retransmission resource is 30 PRB. If the retransmission resource required for the data that needs to be retransmitted is 30% or 0.3, it represents a ratio with respect to the total resource for transmitting the first data, and if the total resource for transmitting the first data is 100PRB, it may be determined that the retransmission resource is 30 PRB.
When the resource indication information is the first quantization indication information, the base station determines the retransmission resource according to the resource indication information occupied by the data to be retransmitted, including:
and determining the frequency domain resource corresponding to the first quantization indication information according to the corresponding relation between the frequency domain quantization indication information and the frequency domain resource, and determining the corresponding frequency domain resource as the retransmission resource.
In the embodiment of the present application, the correspondence between the frequency domain quantization indicating information and the frequency domain resources may be understood with reference to table 1, as shown in table 1:
table 1: corresponding relation between domain quantization indication information and frequency domain resources
Of course, table 1 is only an exemplary illustration, and actually, the numerical values in the correspondence relationship are not limited to the ones listed in table 1, and the correspondence relationship between the indication information and the numerical values of the frequency domain resources is not limited to the numerical values in table 1, and the correspondence relationship between the frequency domain quantization indication information and the frequency domain resources may be embodied by a relational expression, or may not be represented in a table form.
Also taking table 1 as an example, when the first quantization indicating information received by the base station is 3, it may be determined that the retransmission resource is 30 PRB. The quantization indication information is used to further save transmission resources because the number of bytes of the quantization indication information is small.
If the total resource for transmitting the first data is 100PRB, the remaining resource is 70PRB, which is 100-30 PRB. The second data for the first terminal or the second terminal may be scheduled on the remaining 70 PRBs, i.e. one or more new transmissions may be scheduled on the remaining resources.
An example of a scenario of retransmission scheduling on frequency domain resources can be represented by fig. 4. As shown in fig. 4, 100PRB is needed for the first data transmission, when the first terminal returns NACK and indicates that 30PRB is needed for retransmission, the base station may retransmit on 30PRB, and then schedule the second data for new transmission on the remaining 70 PRB.
Above, the description of the frequency domain resources is described, and the time domain resources are described below.
When the resource indication information required to be occupied by the data that needs to be retransmitted is time domain indication information, for example: if the time domain resource required by the data to be retransmitted is 30 slots, it can be determined that the retransmission resource is 30 slots. If the retransmission resource required for the data that needs to be retransmitted is 30% or 0.3, it represents the ratio with respect to the total resource for transmitting the first data, and if the total resource for transmitting the first data is 100 slots, it may be determined that the retransmission resource is 30 slots.
When the resource indication information is the second quantization indication information, the base station determines the retransmission resource according to the resource indication information occupied by the data to be retransmitted, including:
and determining the time domain resource corresponding to the second quantization indication information according to the corresponding relation between the time domain quantization indication information and the frequency domain resource, and determining the corresponding time domain resource as the retransmission resource.
In the embodiment of the present application, the correspondence between the time domain quantization indicating information and the time domain resource may be understood with reference to table 2, as shown in table 2:
table 2: correlation between time domain quantization indication information and time domain resources
Of course, table 2 is also only an exemplary illustration, and actually, the numerical values in the correspondence relationship are not limited to the ones listed in table 2, and the correspondence relationship between the indication information and the numerical values of the time domain resources is also not limited to the numerical values in table 2, and the correspondence relationship between the time domain quantization indication information and the time domain resources may also be embodied by a relational expression, or may not be represented in a table form.
Also taking table 1 as an example, when the second quantization indicating information received by the base station is 3, it may be determined that the retransmission resource is 30 slots. The quantization indication information is used to further save transmission resources because the number of bytes of the quantization indication information is small.
If the total resource for transmitting the first data is 100 slots, the remaining resource is 100-30 slots to 70 slots. Second data for the first terminal or the second terminal may be scheduled on the remaining 70 slots, i.e., one or more new transmissions may be scheduled on the remaining resources.
An example of a scenario of retransmission scheduling on frequency domain resources can be represented by fig. 5. As shown in fig. 5, 100 slots are needed for initial transmission of first data, and when the first terminal returns NACK and indicates that 30 slots are needed for retransmission, the base station may retransmit in 30 slots, and then schedule second data for new transmission in the remaining 70 slots.
When the retransmission indication information is indication information of data that needs to be retransmitted, the determining, by the base station, retransmission resources according to the retransmission indication information may include:
and determining retransmission resources required by retransmitting the data needing to be retransmitted according to the indication information of the data needing to be retransmitted.
In the embodiments of the present application, for example: when the indication information of the data that needs to be retransmitted is the indication information of the redundancy version that needs to be retransmitted, the retransmission resource that needs to be occupied by the data size of the redundancy version can be determined according to the indication information of the redundancy version. For example: if it is determined that the number of bytes of the data amount of the remaining version needs to occupy the frequency domain resource of 30 PRBs, it may be determined that the retransmission resource is 30 PRBs. The indication information of the data needing to be retransmitted can also be modulation information of the data needing to be retransmitted.
The second data comprises one or more newly transmitted data scheduled to the first terminal, and the one or more newly transmitted data are scheduled by the base station to be transmitted on the same carrier.
The first data and the second data are transmitted by using different buffers in the same HARQ process, or the first data and the second data are transmitted by using different HARQ processes.
And when in new transmission scheduling, the HARQ process different from the retransmission process is selected to be used for the new transmission scheduling.
The above is a description of a retransmission scheduling method, and a base station in an embodiment of the present application is described below with reference to the accompanying drawings.
As shown in fig. 6, an embodiment of the base station 30 provided in the embodiment of the present application includes:
a sending unit 301, configured to send first data to a first terminal;
a receiving unit 302, configured to receive a negative acknowledgement message sent by the first terminal, where the negative acknowledgement message is sent by the first terminal when the first data is not successfully demodulated, and the negative acknowledgement message carries retransmission indication information, where the retransmission indication information is used to indicate that the base station needs to retransmit information;
a determining unit 303, configured to determine retransmission resources according to the retransmission indication information received by the receiving unit 302;
a scheduling unit 304, configured to schedule data that needs to be retransmitted in the first data on the retransmission resource determined by the determining unit 303.
Compared with the low accuracy of the retransmission resources pre-estimated by the base station in the prior art, the base station provided by the embodiment of the application can determine the retransmission resources according to the retransmission indication information of the terminal, and then performs retransmission scheduling on the retransmission resources, so that the accuracy of the use of the retransmission resources is improved.
Optionally, the determining unit 303 is further configured to determine a remaining resource according to the retransmission resource and a resource for transmitting the first data for the first time;
the scheduling unit 304 is further configured to schedule second data on the remaining resources determined by the determining unit 303, where the second data includes at least one new transmission data and/or at least one retransmission data.
Optionally, the determining unit 303 is specifically configured to determine, when the retransmission indication information is resource indication information that is required to be occupied by the data that needs to be retransmitted, the retransmission resource according to the resource indication information that is required to be occupied by the data that needs to be retransmitted;
the resource indication information includes a value, a ratio or first quantization indication information of a frequency domain resource required for retransmitting the data to be retransmitted, or a value, a ratio or second quantization indication information of a time domain resource required for retransmitting the data to be retransmitted, the first quantization indication information is indication information of the value or the ratio of the frequency domain resource, and the second quantization indication information is indication information of the value or the ratio of the time domain resource.
Optionally, the determining unit 303 is specifically configured to, when the resource indication information is the first quantization indication information or the second quantization indication information, determine, according to a correspondence between frequency domain quantization indication information and frequency domain resources, a frequency domain resource corresponding to the first quantization indication information, and determine the corresponding frequency domain resource as the retransmission resource; or determining the time domain resource corresponding to the second quantization indication information according to the corresponding relationship between the time domain quantization indication information and the frequency domain resource, and determining the corresponding time domain resource as the retransmission resource.
Optionally, the determining unit 303 is specifically configured to determine, when the retransmission indication information is indication information of data that needs to be retransmitted, retransmission resources required for retransmitting the data that needs to be retransmitted according to the indication information of the data that needs to be retransmitted.
The second data is data scheduled to the first terminal or data scheduled to a second terminal, and the second terminal is at least one terminal of other terminals except the first terminal in a multi-user scenario.
The second data comprises one or more newly transmitted data scheduled to the first terminal, and the one or more newly transmitted data are scheduled by the base station to be transmitted on the same carrier.
The first data and the second data are transmitted by using different buffers in the same HARQ process, or the first data and the second data are transmitted by using different HARQ processes.
That is, the transmitting unit 301 is configured to perform the steps 101 and 201 in the method embodiment, the receiving unit 302 is configured to perform the steps 102 and 202 in the method embodiment, and the determining unit 303 is configured to perform the steps 103, 203 and 205 and the refinement step of the step 203 in the method embodiment. The scheduling unit 304 is configured to perform step 104, step 204 and step 206 in the method embodiment.
Referring to fig. 7, an embodiment of the terminal 40 provided in the embodiment of the present application includes:
a receiving unit 401, configured to receive first data sent by a base station;
a demodulating unit 402 configured to demodulate the first data received by the receiving unit 401;
a sending unit 403, configured to send, to the base station, a negative acknowledgement message when the demodulation unit 402 does not successfully demodulate the first data, where the negative acknowledgement message carries retransmission indication information, and the retransmission indication information is used to indicate information that the base station needs to retransmit, so that the base station determines retransmission resources according to the retransmission indication information, and schedules data that needs to be retransmitted in the first data on the retransmission resources. When the first data sent by the base station is not successfully demodulated, the terminal can send retransmission indicating information of the data which is not demodulated out to the base station according to the demodulated condition, so that the base station can determine retransmission resources according to the retransmission indicating information of the terminal, and then performs retransmission scheduling on the retransmission resources, thereby improving the accuracy of the use of the retransmission resources.
Optionally, the receiving unit 401 is further configured to receive retransmission data in the first data scheduled by the base station, and receive second data scheduled by the base station on resources remaining except the retransmission resources, where the second data includes at least one new transmission data and/or at least one retransmission data. The terminal provided by the embodiment of the application can receive newly transmitted data on the resource for receiving and sending the retransmitted data, and fully utilizes the residual resource during retransmission, so that the utilization rate of the resource is improved.
Fig. 8 is a schematic structural diagram of a base station 30 according to an embodiment of the present application. The base station 30 includes a processor 310, a memory 350, and a transceiver 330, which transceiver 330 may be an antenna. Memory 350 may include both read-only memory and random-access memory, and provides operating instructions and data to processor 310. A portion of the memory 350 may also include non-volatile random access memory (NVRAM).
In some embodiments, memory 350 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof:
in the embodiment of the present application, by calling the operation instruction stored in the memory 350 (the operation instruction may be stored in the operating system),
transmitting first data to the first terminal through the transceiver 330;
receiving, by a transceiver 330, a negative acknowledgement message sent by the first terminal, where the negative acknowledgement message is sent by the first terminal when the first data is not successfully demodulated, and the negative acknowledgement message carries retransmission indication information, where the retransmission indication information is used to indicate that the base station needs to retransmit information;
and determining retransmission resources according to the retransmission indication information, and scheduling data needing to be retransmitted in the first data on the retransmission resources.
Compared with the low accuracy of the retransmission resources pre-estimated by the base station in the prior art, the base station provided by the embodiment of the application can determine the retransmission resources according to the retransmission indication information of the terminal, and then performs retransmission scheduling on the retransmission resources, so that the accuracy of the use of the retransmission resources is improved.
The processor 310 controls the operation of the base station 30, and the processor 310 may also be referred to as a Central Processing Unit (CPU). Memory 350 may include both read-only memory and random-access memory, and provides instructions and data to processor 310. A portion of the memory 350 may also include non-volatile random access memory (NVRAM). The various components of the base station 30 in a particular application are coupled together by a bus system 320, wherein the bus system 320 may include a power bus, a control bus, a status signal bus, etc., in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 320 in the figures.
The method disclosed in the above embodiments of the present application may be applied to the processor 310, or implemented by the processor 310. The processor 310 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 310. The processor 310 may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 350, and the processor 310 reads the information in the memory 350 and completes the steps of the method in combination with the hardware.
Optionally, the processor 310 is further configured to:
determining the residual resources according to the retransmission resources and the resources for sending the first data for the first time;
and scheduling second data on the residual resources, wherein the second data comprises at least one new transmission data and/or at least one retransmission data.
Optionally, the processor 310 is specifically configured to: when the retransmission indication information is the resource indication information required to be occupied by the data required to be retransmitted, determining the retransmission resource according to the resource indication information required to be occupied by the data required to be retransmitted;
the resource indication information includes a value, a ratio or first quantization indication information of a frequency domain resource required for retransmitting the data to be retransmitted, or a value, a ratio or second quantization indication information of a time domain resource required for retransmitting the data to be retransmitted, the first quantization indication information is indication information of the value or the ratio of the frequency domain resource, and the second quantization indication information is indication information of the value or the ratio of the time domain resource.
Optionally, the processor 310 is specifically configured to: when the resource indication information is the first quantization indication information or the second quantization indication information, determining a frequency domain resource corresponding to the first quantization indication information according to a corresponding relationship between frequency domain quantization indication information and frequency domain resources, and determining the corresponding frequency domain resource as the retransmission resource; alternatively, the first and second electrodes may be,
and determining the time domain resource corresponding to the second quantization indication information according to the corresponding relation between the time domain quantization indication information and the frequency domain resource, and determining the corresponding time domain resource as the retransmission resource.
Optionally, the processor 310 is specifically configured to: and when the retransmission indication information is the indication information of the data needing to be retransmitted, determining retransmission resources needed by retransmitting the data needing to be retransmitted according to the indication information of the data needing to be retransmitted.
The second data is data scheduled to the first terminal or data scheduled to a second terminal, and the second terminal is at least one terminal of other terminals except the first terminal in a multi-user scene.
The above description of the base station 30 can be understood with reference to the descriptions of fig. 1 to 5, and the description is not repeated here.
The first terminal in this embodiment may be a mobile terminal such as a mobile phone and a telephone watch, and the process of retransmission scheduling in this embodiment is described below with reference to the mobile terminal shown in fig. 9.
Fig. 9 is a block diagram illustrating a partial structure of a mobile terminal 800 according to an embodiment of the present invention. Referring to fig. 9, the mobile terminal includes: radio Frequency (RF) circuitry 810, memory 820, input unit 830, display unit 840, sensor 850, audio circuitry 860, WiFi module 870, processor 880, and power supply 890. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 9 is not intended to be limiting of mobile terminals and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The following describes each component of the mobile terminal in detail with reference to fig. 9:
RF circuitry 810 may be used to transmit or receive data;
the memory 820 may be used to store software programs and modules, and the processor 880 executes various functional applications and data processing of the mobile terminal by operating the software programs and modules stored in the memory 820. The memory 820 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the mobile terminal, and the like. Further, the memory 820 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 volatile solid state storage device.
The input unit 830 may be used to receive an operation instruction of a user and generate a key signal input related to user setting and function control of the mobile terminal 800. Specifically, the input unit 830 may include a touch panel 831 and other input devices 832. The touch panel 831, also referred to as a touch screen, can collect touch operations of a user (e.g., operations of the user on the touch panel 831 or near the touch panel 831 using any suitable object or accessory such as a finger or a stylus pen) thereon or nearby, and drive a corresponding connected mobile terminal according to a preset program. Alternatively, the touch panel 831 may include two portions of a touch detection mobile terminal and a touch controller. The touch detection mobile terminal detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing mobile terminal, converts it into touch point coordinates, and then sends the touch point coordinates to the processor 880, and can receive and execute commands sent from the processor 880. In addition, the touch panel 831 may be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The input unit 830 may include other input devices 832 in addition to the touch panel 831. In particular, other input devices 832 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.
The display unit 840 may be used to display an interface. The Display unit 840 may include an indicator Light 841, and the indicator Light 841 may be optionally configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. Further, touch panel 831 can cover indicator 841, and when touch panel 831 detects a touch operation thereon or nearby, it can transmit to processor 880 to determine the type of touch event, and then processor 880 can provide a corresponding visual output on indicator 841 according to the type of touch event. Although the touch panel 831 and the indicator light 841 are implemented as two separate components in fig. 9 to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 831 and the indicator light 841 may be integrated to implement the input and output functions of the mobile terminal.
The mobile terminal 800 may also include at least one sensor 850.
The processor 880 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 820 and calling data stored in the memory 820, thereby integrally monitoring the mobile terminal. Optionally, processor 880 may include one or more processing units; preferably, the processor 880 may integrate an application processor, which mainly handles operating systems, user interfaces, applications, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 880.
The mobile terminal 800 further includes a power supply 890 (e.g., a battery) for supplying power to the various components, which may be logically connected to the processor 880 via a power management system that may be configured to manage charging, discharging, and power consumption.
Although not shown, the mobile terminal 800 may further include a camera, a bluetooth module, etc., which will not be described herein.
In the embodiment of the present invention, the processor 880 included in the mobile terminal when determining the sentence consistency further has the following functions:
receiving first data sent by a base station;
demodulating the first data;
when the first data is not successfully demodulated, a negative response message is sent to the base station, the negative response message carries retransmission indication information, and the retransmission indication information is used for indicating information which needs to be retransmitted by the base station, so that the base station determines retransmission resources according to the retransmission indication information, and schedules data which needs to be retransmitted in the first data on the retransmission resources.
Optionally, the method further comprises: and receiving retransmission data in the first data scheduled by the base station, and receiving second data scheduled by the base station on the remaining resources except the retransmission resources, wherein the second data comprises at least one new transmission data and/or at least one retransmission data.
Optionally, the retransmission indication information includes resource indication information that needs to be occupied by the data that needs to be retransmitted or indication information of the data that needs to be retransmitted;
the resource indication information comprises a numerical value, a proportion or first quantization indication information of a frequency domain resource required by retransmitting the data needing to be retransmitted, or a numerical value, a proportion or second quantization indication information of a time domain resource required by retransmitting the data needing to be retransmitted, wherein the first quantization indication information is indication information of the numerical value or the proportion of the frequency domain resource, and the second quantization indication information is indication information of the numerical value or the proportion of the time domain resource;
the indication information of the data needing to be retransmitted comprises redundancy version indication information needing to be retransmitted and modulation information of the data needing to be retransmitted.
The functions of the mobile terminal provided in fig. 9 can be understood by referring to the corresponding descriptions of the first terminal portion in fig. 1 to fig. 5, and are not repeated herein.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.
The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
The method, the device, and the system for scheduling retransmission provided in the embodiment of the present application are introduced in detail above, and a specific example is applied in the present application to explain the principle and the embodiment of the present application, and the description of the above embodiment is only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (17)
1. A method for scheduling retransmissions, comprising:
a base station sends first data to a first terminal;
the base station receives a negative response message sent by the first terminal, wherein the negative response message is sent by the first terminal when the first terminal fails to successfully demodulate the first data, the negative response message carries retransmission indication information, and the retransmission indication information is used for indicating information which needs to be retransmitted by the base station;
the base station determines retransmission resources according to the retransmission indication information, and schedules data needing to be retransmitted in the first data on the retransmission resources;
the base station determines the residual resources according to the retransmission resources and the resources for sending the first data for the first time;
the base station schedules second data on the residual resources;
the second data is data scheduled to a second terminal, and the second terminal is at least one terminal of other terminals except the first terminal in a multi-user scene.
2. The method of claim 1,
the second data comprises at least one new transmission data and/or at least one retransmission data.
3. The method according to claim 1 or 2, wherein when the retransmission indication information is resource indication information that is required to be occupied by the data that needs to be retransmitted, the base station determines retransmission resources according to the retransmission indication information, and the method includes:
determining the retransmission resources according to the resource indication information occupied by the data to be retransmitted;
the resource indication information includes a value, a ratio or first quantization indication information of a frequency domain resource required for retransmitting the data to be retransmitted, or a value, a ratio or second quantization indication information of a time domain resource required for retransmitting the data to be retransmitted, the first quantization indication information is indication information of the value or the ratio of the frequency domain resource, and the second quantization indication information is indication information of the value or the ratio of the time domain resource.
4. The method of claim 3, wherein when the resource indication information is the first quantization indication information or the second quantization indication information,
the base station determines the retransmission resources according to the resource indication information occupied by the data to be retransmitted, including:
determining the frequency domain resource corresponding to the first quantization indication information according to the corresponding relation between the frequency domain quantization indication information and the frequency domain resource, and determining the corresponding frequency domain resource as the retransmission resource; alternatively, the first and second electrodes may be,
and determining the time domain resource corresponding to the second quantization indication information according to the corresponding relation between the time domain quantization indication information and the frequency domain resource, and determining the corresponding time domain resource as the retransmission resource.
5. The method according to claim 1 or 2, wherein when the retransmission indication information is indication information of data that needs to be retransmitted, the determining, by the base station, retransmission resources according to the retransmission indication information includes:
and determining retransmission resources required by retransmitting the data needing to be retransmitted according to the indication information of the data needing to be retransmitted.
6. The method of claim 2, wherein the first data and the second data are transmitted using different buffers in the same HARQ process, or wherein the first data and the second data are transmitted using different HARQ processes.
7. A method for scheduling retransmissions, comprising:
a first terminal receives first data sent by a base station;
the first terminal demodulates the first data;
when the first terminal does not successfully demodulate the first data, sending a negative response message to the base station, wherein the negative response message carries retransmission indication information, and the retransmission indication information is used for indicating information which needs to be retransmitted by the base station, so that the base station determines retransmission resources according to the retransmission indication information and schedules data which needs to be retransmitted in the first data on the retransmission resources;
receiving retransmission data in the first data scheduled by the base station, and receiving second data scheduled by the base station on the resources except the retransmission resources;
the second data is data scheduled to a second terminal, and the second terminal is at least one terminal of other terminals except the first terminal in a multi-user scene.
8. The method of claim 7,
the second data comprises at least one new transmission data and/or at least one retransmission data.
9. The method according to claim 7 or 8, wherein the retransmission indication information comprises indication information of resources occupied by the data to be retransmitted or indication information of the data to be retransmitted;
the resource indication information comprises a numerical value, a proportion or first quantization indication information of a frequency domain resource required by retransmitting the data needing to be retransmitted, or a numerical value, a proportion or second quantization indication information of a time domain resource required by retransmitting the data needing to be retransmitted, wherein the first quantization indication information is indication information of the numerical value or the proportion of the frequency domain resource, and the second quantization indication information is indication information of the numerical value or the proportion of the time domain resource;
the indication information of the data needing to be retransmitted comprises redundancy version indication information needing to be retransmitted and modulation information of the data needing to be retransmitted.
10. A base station, comprising:
a sending unit, configured to send first data to a first terminal;
a receiving unit, configured to receive a negative acknowledgement message sent by the first terminal, where the negative acknowledgement message is sent by the first terminal when the first data is not successfully demodulated, and the negative acknowledgement message carries retransmission indication information, where the retransmission indication information is used to indicate that the base station needs to retransmit information;
a determining unit, configured to determine retransmission resources according to the retransmission indication information received by the receiving unit;
a scheduling unit, configured to schedule data that needs to be retransmitted in the first data on the retransmission resource determined by the determining unit;
the determining unit is further configured to determine a remaining resource according to the retransmission resource and a resource for first sending the first data;
the scheduling unit is further configured to schedule second data on the remaining resources determined by the determining unit;
the second data is data scheduled to a second terminal, and the second terminal is at least one terminal of other terminals except the first terminal in a multi-user scene.
11. The base station of claim 10,
the second data comprises at least one new transmission data and/or at least one retransmission data.
12. The base station according to claim 10 or 11,
the determining unit is specifically configured to determine the retransmission resource according to the resource indication information that needs to be occupied by the data that needs to be retransmitted, when the retransmission indication information is the resource indication information that needs to be occupied by the data that needs to be retransmitted;
the resource indication information includes a value, a ratio or first quantization indication information of a frequency domain resource required for retransmitting the data to be retransmitted, or a value, a ratio or second quantization indication information of a time domain resource required for retransmitting the data to be retransmitted, the first quantization indication information is indication information of the value or the ratio of the frequency domain resource, and the second quantization indication information is indication information of the value or the ratio of the time domain resource.
13. The base station of claim 12,
the determining unit is specifically configured to, when the resource indication information is the first quantization indication information or the second quantization indication information, determine, according to a correspondence between frequency domain quantization indication information and frequency domain resources, a frequency domain resource corresponding to the first quantization indication information, and determine the corresponding frequency domain resource as the retransmission resource; or determining the time domain resource corresponding to the second quantization indication information according to the corresponding relationship between the time domain quantization indication information and the frequency domain resource, and determining the corresponding time domain resource as the retransmission resource.
14. The base station according to claim 10 or 11,
the determining unit is specifically configured to determine, when the retransmission indication information is indication information of data that needs to be retransmitted, retransmission resources required for retransmitting the data that needs to be retransmitted according to the indication information of the data that needs to be retransmitted.
15. A first terminal, comprising:
a receiving unit, configured to receive first data sent by a base station;
a demodulation unit configured to demodulate the first data received by the reception unit;
a sending unit, configured to send a negative response message to the base station when the demodulating unit does not successfully demodulate the first data, where the negative response message carries retransmission indication information, and the retransmission indication information is used to indicate information that the base station needs to retransmit, so that the base station determines retransmission resources according to the retransmission indication information, and schedules data that needs to be retransmitted in the first data on the retransmission resources;
the receiving unit is further configured to receive retransmission data in the first data scheduled by the base station, and receive second data scheduled by the base station on a remaining resource except the retransmission resource;
the second data is data scheduled to a second terminal, and the second terminal is at least one terminal of other terminals except the first terminal in a multi-user scene.
16. The first terminal of claim 15,
the second data comprises at least one new transmission data and/or at least one retransmission data.
17. A wireless communication system, comprising: a base station and a terminal;
the base station is the base station of any one of claims 10-14;
the terminal is the terminal of claim 15 or 16.
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| PT115587B (en) * | 2019-06-18 | 2021-07-16 | Univ Do Porto | METHOD AND DEVICE FOR CONTINUOUS DIRECT BROADCAST WITH OPPORTUNIST LOAD SHARING BY MOBILE PERIPHERAL CLOUD COMPUTING |
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