CN111757512A - Uplink scheduling method and device - Google Patents

Uplink scheduling method and device Download PDF

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CN111757512A
CN111757512A CN201910245083.3A CN201910245083A CN111757512A CN 111757512 A CN111757512 A CN 111757512A CN 201910245083 A CN201910245083 A CN 201910245083A CN 111757512 A CN111757512 A CN 111757512A
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harq
uplink scheduling
maximum
transmission
uplink
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CN111757512B (en
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鲜柯
王亮
冯翔
姚敏
陈迎
魏立梅
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Chengdu TD Tech Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • 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]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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Abstract

The uplink scheduling method and device provided by the embodiment of the invention comprise the following steps: and when determining that new data needs to be subjected to uplink transmission, configuring uplink scheduling parameters according to protocol regulations, wherein the uplink scheduling parameters comprise an uplink Scheduling Request (SR) period and the SR maximum transmission times, and performing uplink scheduling according to the uplink scheduling parameters, wherein the product of the SR period and the SR maximum transmission times is larger than a first threshold value, and the first threshold value is the sum of the product of the Physical Uplink Shared Channel (PUSCH) maximum repetition times and the hybrid automatic repeat request (HARQ) maximum retransmission times and a first preset offset value. By the uplink scheduling method provided by the invention, the terminal sends the uplink scheduling request SR to the base station after the HARQ transmission is finished, thereby avoiding random access and ensuring the continuity of the service.

Description

Uplink scheduling method and device
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to an uplink scheduling method and device.
Background
The Internet of Things (IoT) is an important component of future information technology development, and is mainly technically characterized in that an article is connected with a network through a communication technology, so that an intelligent network with man-machine interconnection and object interconnection is realized. The 3rd Generation Partnership Project (3 GPP) standard has evolved based on LTE for the features of such internet of things services, and designs an enhanced machine Type communication (eMTC) technology specifically used for the internet of things.
In the eMTC, when a terminal is in an edge weak coverage area, in order to enhance coverage, a large number of times of repeatedly sending a hybrid automatic Repeat Request (HARQ) are generally required to ensure coverage and service, and in HARQ retransmission time, a base station cannot respond to an uplink Scheduling Request (SR) Request to give a new grant to the terminal, and when the terminal SR reaches a maximum sending time and does not receive the base station grant, the random access is re-initiated, which affects service continuity.
Disclosure of Invention
The embodiment of the invention provides an uplink scheduling method and device, aiming at overcoming the problem that when the terminal SR reaches the maximum sending times and is not authorized by a base station, random access is reinitiated and the continuity of service is influenced.
In a first aspect, an embodiment of the present invention provides an uplink scheduling method, including:
when new data is determined to need uplink transmission, configuring uplink Scheduling parameters according to protocol regulations, wherein the uplink Scheduling parameters comprise an uplink Scheduling Request (SR) period and the maximum SR sending times;
performing uplink scheduling according to the uplink scheduling parameters;
the product of the SR period and the SR maximum transmission number is greater than a first threshold, where the first threshold is a sum of a product of a Physical Uplink Shared Channel (PUSCH) maximum repetition number and a Hybrid Automatic Repeat reQuest (HARQ) maximum retransmission number and a first preset offset value.
In one possible design, the protocol includes a maximum number n of SR transmissions and an SR transmission period;
wherein n comprises any one of the following values:
4、8、16、32、64、128、256、512、1024、2048；
the SR transmission period includes any one of the following durations:
5、10、20、40、80、2、1、160、320、640、1280。
in a second aspect, an embodiment of the present invention provides an uplink scheduling method, including;
when new data needs to be transmitted in an uplink, determining whether hybrid automatic repeat request (HARQ) is transmitted currently;
if the HARQ is transmitted currently, determining whether the transmission repetition times of the current HARQ is greater than or equal to a second threshold value;
and if the current HARQ transmission repetition number is greater than or equal to a second threshold, sending an uplink Scheduling Request (SR) to a base station after the HARQ transmission is finished.
In one possible design, the method further includes:
and if the HARQ is not transmitted currently or the transmission repetition number of the current HARQ is less than a second threshold value, sending an uplink scheduling request SR to the base station.
In a fourth aspect, an embodiment of the present invention provides an uplink scheduling method, including:
when the uplink scheduling request SR is sent to the maximum number of times, determining whether a hybrid automatic repeat request HARQ is transmitted currently;
if the HARQ is transmitted currently, determining whether the transmission repetition times of the current HARQ is greater than or equal to a second threshold value;
and if the current HARQ transmission repetition number is greater than or equal to a second threshold, initiating random access to the base station after a preset time length, wherein the preset time length is determined according to the physical uplink shared channel PUSCH maximum repetition number and the hybrid automatic repeat request HARQ maximum retransmission number.
In one possible design, the method further includes:
and if the HARQ is not transmitted currently or the transmission repetition number of the current HARQ is less than a second threshold value, initiating random access to the base station.
In one possible design, the preset time period T is determined according to the following formula:
Figure BDA0002010829880000031
wherein:
a is the maximum PUSCH repetition times and the maximum HARQ retransmission times, B is the uplink subframe number of 1 wireless frame, and C is a second preset offset value;
or,
a is the number of remaining repeated transmissions of the current HARQ transmission + (HARQ maximum retransmission-HARQ retransmitted number) × PUSCH maximum repetition number, B is the number of uplink subframes of 1 radio frame, and C is a second preset offset value.
In a fourth aspect, an embodiment of the present invention provides an uplink scheduling apparatus, including:
the configuration module is used for configuring uplink scheduling parameters according to protocol regulations when determining that new data needs to be subjected to uplink transmission, wherein the uplink scheduling parameters comprise an uplink Scheduling Request (SR) period and the maximum SR sending times;
the processing module is used for carrying out uplink scheduling according to the uplink scheduling parameters;
the product of the SR period and the SR maximum transmission times is greater than a first threshold, and the first threshold is the sum of the product of the Physical Uplink Shared Channel (PUSCH) maximum repetition times and the hybrid automatic repeat request (HARQ) maximum retransmission times and a first preset offset value.
In one possible design, the protocol includes a maximum number n of SR transmissions and an SR transmission period;
wherein n comprises any one of the following values:
4、8、16、32、64、128、256、512、1024、2048；
the SR transmission period includes any one of the following durations:
5、10、20、40、80、2、1、160、320、640、1280。
in a fifth aspect, an embodiment of the present invention provides an uplink scheduling apparatus, including:
a determining module, configured to determine whether a hybrid automatic repeat request HARQ is currently transmitted when new data needs to be uplink transmitted;
the determining module is further configured to determine whether the number of transmission repetitions of the current HARQ is greater than or equal to a second threshold, if the HARQ is currently being transmitted;
and the sending module is used for sending an uplink scheduling request SR to the base station after the HARQ transmission is finished if the current HARQ transmission repetition times is greater than or equal to a second threshold value.
In one possible design, the sending module is further configured to:
and if the HARQ is not transmitted currently or the transmission repetition number of the current HARQ is less than a second threshold value, sending an uplink scheduling request SR to the base station.
In a sixth aspect, an embodiment of the present invention provides an uplink scheduling apparatus, including:
the determining module is used for determining whether hybrid automatic repeat request (HARQ) is transmitted currently or not when the uplink Scheduling Request (SR) is sent to the maximum times;
the determining module is further configured to determine whether the number of transmission repetitions of the current HARQ is greater than or equal to a second threshold, if the HARQ is currently being transmitted;
and the processing module is used for initiating random access to the base station after a preset time length if the repetition frequency of the current HARQ is greater than or equal to a second threshold, wherein the preset time length is determined according to the maximum repetition frequency of the PUSCH and the maximum retransmission frequency of the HARQ.
In one possible design, the processing module is further to:
and if the HARQ is not transmitted currently or the transmission repetition number of the current HARQ is less than a second threshold value, initiating random access to the base station.
In one possible design, the preset time period T is determined according to the following formula:
Figure BDA0002010829880000041
wherein:
a is the maximum PUSCH repetition times and the maximum HARQ retransmission times, B is the uplink subframe number of 1 wireless frame, and C is a second preset offset value;
or,
a is the number of remaining repeated transmissions of the current HARQ transmission + (HARQ maximum retransmission-HARQ retransmitted number) × PUSCH maximum repetition number, B is the number of uplink subframes of 1 radio frame, and C is a second preset offset value.
In a seventh aspect, an embodiment of the present invention provides a terminal, including: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor executes the uplink scheduling method according to the first aspect, the second aspect, or the third aspect.
In an eighth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer-executable instruction is stored in the computer-readable storage medium, and when a processor executes the computer-executable instruction, the uplink scheduling method according to the first aspect, the second aspect, or the third aspect is implemented.
The uplink scheduling method and device provided by the embodiment comprise the following steps: when it is determined that new data needs to be subjected to uplink transmission, configuring uplink scheduling parameters according to protocol regulations, wherein the uplink scheduling parameters comprise an uplink Scheduling Request (SR) period and the SR maximum transmission times, and performing uplink scheduling according to the uplink scheduling parameters, wherein the product of the SR period and the SR maximum transmission times is greater than a first threshold value, and the first threshold value is the sum of the product of the PUSCH maximum repetition times and the HARQ maximum retransmission times and a first preset offset value, so that the terminal sends the uplink Scheduling Request (SR) to the base station after the HARQ transmission is completed, random access is avoided, the continuity of services is ensured, and the base station cannot respond to the uplink Scheduling Request (SR) during the HARQ retransmission period, so that the terminal initiates random access to influence the continuity of the services.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of an uplink scheduling system according to an embodiment of the present invention;
fig. 2 is a first flowchart of an uplink scheduling method according to an embodiment of the present invention;
fig. 3 is a second flowchart of an uplink scheduling method according to an embodiment of the present invention;
fig. 4 is a third flowchart of an uplink scheduling method according to an embodiment of the present invention;
fig. 5 is a first schematic structural diagram of an uplink scheduling apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a second uplink scheduling apparatus according to an embodiment of the present invention;
fig. 7 is a third schematic structural diagram of an uplink scheduling apparatus according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a hardware structure of a terminal according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
eMTC: the Enhanced Machine Type Communications is applied to the Internet of things, has the characteristics of wide coverage, low cost, low power consumption and support of mass connection, wherein the wide coverage is realized by repeated transmission of a plurality of continuous subframes, frequency hopping and other technologies, and is suitable for areas needing deep coverage, such as basements, remote areas, edge weak coverage areas and the like.
SR: a Scheduling Request, an Uplink Scheduling Request, a manner in which a terminal applies resources to a base station for new data transmission, may be transmitted through a Physical Uplink Control CHannel (PUCCH).
HARQ: hybrid Automatic Repeat reQuest (harq), a technology formed by combining forward error correction coding (fec) and an Automatic Repeat reQuest (arq), may be transmitted through a Physical Uplink Shared Channel (PUSCH).
Fig. 1 is a schematic diagram of a system for uplink scheduling according to an embodiment of the present invention. As shown in fig. 1, the uplink scheduling system provided in this embodiment includes a terminal and a base station. The terminal can be located in an area needing deep coverage, such as an edge weak coverage area, and can be a user terminal such as a mobile phone and a computer.
Table 1 is a table of SR periods provided by existing protocols, and as can be seen from table 1, the SR period is at most 80 milliseconds (ms), and reference may be specifically made to the relevant description in the 3GPP TS 36.321 protocol.
TABLE 1
SR configuration index ISR SR period (ms) SR subframe offset
0-4 5 ISR
5-14 10 ISR-5
15-34 20 ISR-15
35-74 40 ISR-35
75-154 80 ISR-75
155-156 2 ISR-155
157 1 ISR-157
In addition, the existing protocol also provides the existing maximum number of SR transmissions:
Figure BDA0002010829880000061
Figure BDA0002010829880000071
as known from the conventional protocol, the maximum SR transmission times may be 4, 8, 16, 32, and 64, and the maximum time for continuously transmitting 64 SR times is 64 × 80 ms — 5.12 s.
At present, when a terminal is in an edge weak coverage area to transmit HARQ, an abnormal random access phenomenon may exist, specifically, if the terminal is transmitting HARQ, for example, 2048 times of repeated transmission, in a TDD system, for a subframe ratio of SA1, 2048 times of uplink single HARQ transmission require 5.12 seconds, and 5.12 × 4-20.48 seconds are required for 4 consecutive HARQ retransmissions; for the subframe allocation of SA2, 2048 uplink single HARQ transmissions take 10.24 seconds, and 10.24 × 4-40.96 seconds for 4 consecutive HARQ retransmissions. Therefore, the maximum time for continuously transmitting 64 times of SR is equal to the time for uplink single HARQ transmission 2048 times and less than the time for continuous multiple HARQ retransmissions, so that in the time for single HARQ or multiple HARQ retransmissions, the base station cannot respond to the SR request to give a new authorization to the terminal, and the terminal SR reaches the maximum transmission time and does not receive the authorization from the base station, which causes the terminal to initiate random access and affects service continuity.
In order to solve the above problem, an embodiment of the present invention provides an uplink scheduling method, where the method configures an uplink scheduling parameter, so as to ensure that a terminal sends an uplink scheduling request SR to a base station after HARQ transmission is completed, thereby avoiding random access, ensuring service continuity, and preventing the base station from failing to respond to the uplink scheduling request SR during HARQ retransmission, which may cause the terminal to initiate random access and affect service continuity.
The technical solution of the above embodiments of the present invention will be described in detail by using several specific embodiments.
Fig. 2 is a first flowchart of an uplink scheduling method according to an embodiment of the present invention, where an execution main body of this embodiment may be the terminal shown in fig. 1. As shown in fig. 2, the method includes:
s101, when determining that new data needs to be transmitted in an uplink mode, configuring uplink scheduling parameters according to protocol regulations, wherein the uplink scheduling parameters comprise an uplink Scheduling Request (SR) period and the maximum SR transmission times.
It should be noted that, when the terminal determines that new data needs to be uplink-transmitted, it needs to send an uplink scheduling request SR to the base station to apply for resources to the base station for data transmission, and when the terminal is transmitting HARQ, the base station cannot allocate resources because the terminal occupies a PUSCH channel, so only when the terminal sends an SR to the base station after HARQ transmission is completed, the base station can allocate resources to the terminal.
When a terminal determines that new data needs to be transmitted in an uplink, configuring an SR cycle and the SR maximum transmission frequency according to a protocol specification, wherein the product of the SR cycle and the SR maximum transmission frequency is greater than a first threshold, the first threshold is the sum of the product of the Physical Uplink Shared Channel (PUSCH) maximum repetition frequency and the hybrid automatic repeat request (HARQ) maximum retransmission frequency and a first preset offset value, and the following formula I:
SR period, SR maximum transmission number > PUSCH maximum repetition number, HARQ maximum retransmission number + offset formula one
The offset is a first preset offset value, which can be configured according to actual conditions, and the configuration range is 0 to 1024[0, 1024], and the general default value is 32; the maximum number of repetitions of PUSCH is known in a fixed pattern, such as 2048 times in the embodiment of fig. 1; the maximum number of HARQ retransmissions is also known in a fixed mode, e.g. 4 in the embodiment of fig. 1 in a TDD system.
In this embodiment, when the terminal is transmitting HARQ and it is determined that new data needs to be uplink-transmitted, the terminal sends an SR to the base station to obtain resources by configuring the uplink scheduling parameter so that the uplink scheduling parameter satisfies the above conditions, after the terminal completes HARQ transmission, and it is avoided that in the prior art, when the SR reaches the maximum transmission frequency and the HARQ is still transmitting, and the terminal cannot obtain resources allocated by the base station, the terminal initiates random access, which affects service continuity.
Optionally, in the embodiment of the present invention, an SR period and a subframe offset in an existing protocol are modified, and table 2 is a table of SR periods in the protocol provided by the present invention, as shown in table 2, an SR transmission period in the protocol includes any one of the following durations, and a unit is ms: 5,10, 20, 40, 80,2,1, 160, 320, 640, 1280. As can be seen from table 1 and table 2, the SR transmission period in the existing protocol includes any one of the durations of 5, 10, 20, 40, 80, 2, 1, but the SR transmission period in the protocol provided by the present invention is increased by 160, 320, 640, 1280 based on the existing protocol.
TABLE 2
Figure BDA0002010829880000081
Figure BDA0002010829880000091
The protocol provided by the invention also modifies the maximum SR transmission times:
Figure BDA0002010829880000092
as can be seen from the above, the maximum number n of SR transmissions in the protocol provided by the present invention includes any of the following values: 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048; on the basis of the existing protocol, the maximum number of times of SR transmission in the protocol provided by the invention is increased by 128, 256, 512, 1024 and 2048.
Therefore, after the value of the SR period and the value of the SR maximum transmission number are increased, the SR period and the SR maximum transmission number are conveniently configured to satisfy the inequality of the formula one.
And S102, performing uplink scheduling according to the uplink scheduling parameters.
In this embodiment, after the uplink scheduling parameter is configured, uplink scheduling may be performed according to the uplink scheduling parameter, and specifically, after HARQ transmission is completed, the terminal sends an SR to the base station to obtain resources allocated by the base station. The uplink scheduling method provided in this embodiment configures, when it is determined that new data needs to be uplink-transmitted, an uplink scheduling parameter according to a protocol specification, where the uplink scheduling parameter includes an uplink scheduling request SR period and a maximum SR transmission frequency, and performs uplink scheduling according to the uplink scheduling parameter, where a product of the SR period and the maximum SR transmission frequency is greater than a first threshold, and the first threshold is a sum of a product of a maximum PUSCH repetition frequency and a maximum HARQ retransmission frequency and a first preset offset value. By configuring the uplink scheduling parameters, the terminal is ensured to send the uplink scheduling request SR to the base station after the HARQ transmission is finished, the random access is avoided, the service continuity is ensured, and the problem that the base station cannot respond to the uplink scheduling request SR during the HARQ retransmission, so that the terminal initiates the random access to influence the service continuity is avoided.
Fig. 3 is a second flowchart of an uplink scheduling method according to an embodiment of the present invention, where an execution subject of this embodiment may be the terminal in the embodiment shown in fig. 1, as shown in fig. 3, the method includes:
s201, when new data needs to be transmitted in an uplink, whether hybrid automatic repeat request (HARQ) is transmitted currently is determined.
S202, if the HARQ is transmitted currently, determining whether the transmission repetition times of the current HARQ is larger than or equal to a second threshold value.
In this embodiment, the maximum value of the current HARQ transmission repetition number is the maximum PUSCH repetition number, for example, 2048 in the embodiment of fig. 1, and if it is determined that the HARQ is currently being transmitted, then the terminal determines whether the current HARQ transmission repetition number is greater than or equal to the second threshold, it needs to be understood by those skilled in the art that the current HARQ transmission repetition number is less than or equal to the maximum PUSCH repetition number.
The second threshold may be selected according to experience or actual conditions, for example, 100 times, 50 times, and the like, which is not limited in this embodiment.
And S203, if the number of the current HARQ transmission repetition times is larger than or equal to a second threshold, sending an uplink Scheduling Request (SR) to the base station after the HARQ transmission is finished.
In this embodiment, if the number of current HARQ transmission repetitions is greater than or equal to the second threshold, the base station cannot respond to the terminal SR and give the terminal a new grant within the transmission time due to the excessively long HARQ transmission time, so that when new data needs to be transmitted, after the HARQ transmission is completed, the base station sends an uplink scheduling request SR to obtain a new grant of the base station, and obtains resources allocated by the base station.
Optionally, the uplink scheduling method in this embodiment further includes:
and S204, if the HARQ is not transmitted currently or the transmission repetition number of the current HARQ is less than a second threshold value, transmitting an uplink scheduling request SR to the base station.
In this embodiment, if HARQ is not currently transmitted, the PUSCH channel is not occupied, and the terminal obtains the resource allocated by the base station after sending the SR to the base station. Or, if the number of current HARQ transmission repetitions is less than the second threshold, the terminal sends the uplink scheduling request SR to the base station because the HARQ transmission time is short, so that the resource allocated by the base station can be obtained.
Optionally, the sending, by the terminal, the uplink scheduling request SR to the base station specifically includes:
s101, configuring uplink scheduling parameters according to protocol regulations, wherein the uplink scheduling parameters comprise an uplink Scheduling Request (SR) period and the maximum SR sending times.
And S102, performing uplink scheduling according to the uplink scheduling parameters.
And the terminal carries out uplink scheduling according to the uplink scheduling parameters, namely, the terminal sends an SR to the base station according to the uplink scheduling parameters configured in advance so as to obtain the resources allocated by the base station.
In the uplink scheduling method provided in this embodiment, when new data needs to be uplink-transmitted, it is determined whether a hybrid automatic repeat request HARQ is currently transmitted, if the HARQ is currently transmitted, it is determined whether a current HARQ transmission repetition number is greater than or equal to a second threshold, if the current HARQ transmission repetition number is greater than or equal to the second threshold, an uplink scheduling request SR is sent to the base station after HARQ transmission is completed, and if the HARQ is not currently transmitted or the current HARQ transmission repetition number is less than the second threshold, the uplink scheduling request SR is sent to the base station. Random access is avoided, and service continuity is ensured.
Fig. 4 is a third flowchart of an uplink scheduling method according to an embodiment of the present invention, where an execution subject of this embodiment may be the terminal in the embodiment shown in fig. 1, as shown in fig. 4, the method includes:
s301, when the uplink scheduling request SR is sent to the maximum number of times, determining whether the hybrid automatic repeat request HARQ is transmitted currently.
In this embodiment, the maximum number of SR transmissions is preset, and the maximum number of SR transmissions in the existing protocol may be any one of 4, 8, 16, 32, and 64, when the uplink scheduling request SR is transmitted to the maximum number of SR transmissions, that is, the SR is not transmitted any more subsequently, for example, the maximum number of SR transmissions is 64, and when the SR is transmitted 64 times, the terminal determines whether HARQ is currently being transmitted.
Optionally, when the terminal is in the Mode a or Mode of the eMTC, the SR is sent to the maximum number of times, and the terminal determines whether the HARQ is currently transmitted.
S302, if the HARQ is transmitted currently, determining whether the transmission repetition times of the current HARQ is larger than or equal to a second threshold value.
The implementation process of step S302 is similar to that of step S202, and is not described herein again.
S303, if the current HARQ transmission repetition number is larger than or equal to the second threshold, initiating random access to the base station after a preset time length, wherein the preset time length is determined according to the physical uplink shared channel PUSCH maximum repetition number and the hybrid automatic repeat request HARQ maximum retransmission number.
If the number of HARQ transmission repetitions is greater than or equal to the second threshold, in order to prevent the terminal from initiating the abnormal random access because the HARQ transmission time is too long, in this embodiment, the terminal initiates the random access to the base station after a preset time duration, that is, the terminal initiates the random access to the base station after the HARQ transmission is completed within the preset time duration. The preset time length T can be determined according to a formula two:
Figure BDA0002010829880000111
wherein:
a is equal to the product of the PUSCH maximum number of repetitions and the HARQ maximum number of retransmissions, i.e.
A ═ PUSCH maximum repetition number × HARQ maximum retransmission number, which is known in a fixed mode, such as 2048 times in the embodiment of fig. 1, and HARQ maximum retransmission number is also known in the fixed mode, such as 4 times in the TDD system in the embodiment of fig. 1;
b is the uplink subframe number of 1 wireless frame, and is determined according to the subframe ratio;
c is a second preset offset value, which can be configured according to actual situations, and the configuration range is 0 to 1024, i.e., [0, 1024], and the default value is generally 32.
Or,
and A is equal to the product of the difference between the maximum retransmission times of the HARQ and the maximum repetition times of the PUSCH, and the sum of the number of the retransmission times remaining for the current HARQ transmission, namely A is equal to the number of the retransmission times remaining for the current HARQ transmission plus (the maximum retransmission times of the HARQ-the retransmission times of the HARQ) and the maximum retransmission times of the PUSCH, B is the number of uplink subframes of 1 radio frame, and C is a second preset offset value.
Wherein, the maximum number of repetitions of PUSCH is known in a fixed mode, such as 2048 times in the embodiment of fig. 1; the HARQ maximum number of retransmissions is also known in a fixed mode, e.g. 4 in the TDD system in the embodiment of fig. 1; the number of times that HARQ has been retransmitted is the number of times that HARQ has been retransmitted; the remaining number of retransmissions for the current HARQ transmission is obtained by subtracting the current HARQ transmission repetition number from the maximum PUSCH repetition number, for example, the maximum PUSCH repetition number is 2048 times, the current HARQ transmission repetition number is 1000 times, and then the remaining number of retransmissions for the current HARQ transmission is 1048 times.
Optionally, the uplink scheduling method in this embodiment further includes:
s304, if the HARQ is not transmitted currently or the number of times of the transmission repetition of the current HARQ is less than a second threshold value, initiating random access to the base station.
In this embodiment, if HARQ is not currently transmitted, the terminal may directly initiate random access to the base station, or if the number of times of the current HARQ transmission repetition is less than the second threshold, the terminal directly initiates random access to the base station because the HARQ transmission time is short.
In the uplink scheduling method provided in this embodiment, when an uplink scheduling request SR is sent to a maximum number of times, it is determined whether a hybrid automatic repeat request HARQ is currently transmitted, if the HARQ is currently transmitted, it is determined whether a current HARQ transmission repetition number is greater than or equal to a second threshold, if the current HARQ transmission repetition number is greater than or equal to the second threshold, a random access is initiated to a base station after a preset time length, where the preset time length is determined according to a physical uplink shared channel PUSCH maximum repetition number and a hybrid automatic repeat request HARQ maximum repetition number, and if the HARQ is not currently transmitted, or the current HARQ transmission repetition number is less than the second threshold, the random access is initiated to the base station. The uplink scheduling method provided by the embodiment avoids the terminal from initiating abnormal random access when the uplink scheduling request SR is sent to the maximum number of times.
Fig. 5 is a first schematic structural diagram of an uplink scheduling apparatus according to an embodiment of the present invention. As shown in fig. 5, the uplink scheduling apparatus 70 includes: a configuration module 701 and a processing module 702.
A configuration module 701, configured to configure an uplink scheduling parameter according to a protocol specification when it is determined that new data needs to be uplink-transmitted, where the uplink scheduling parameter includes an uplink scheduling request SR period and an SR maximum transmission frequency;
a processing module 702, configured to perform uplink scheduling according to the uplink scheduling parameter;
the product of the SR period and the SR maximum transmission times is greater than a first threshold, and the first threshold is the sum of the product of the Physical Uplink Shared Channel (PUSCH) maximum repetition times and the hybrid automatic repeat request (HARQ) maximum retransmission times and a first preset offset value.
In one possible design, the protocol includes a maximum number n of SR transmissions and an SR transmission period;
wherein n comprises any one of the following values:
4、8、16、32、64、128、256、512、1024、2048；
the SR transmission period includes any one of the following durations:
5、10、20、40、80、2、1、160、320、640、1280。
the apparatus provided in this embodiment may be used to implement the technical solution of the method embodiment in fig. 3, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 6 is a schematic structural diagram of a second uplink scheduling apparatus according to an embodiment of the present invention. As shown in fig. 6, the uplink scheduling apparatus 80 includes: a determination module 801 and a sending module 802.
A determining module 801, configured to determine whether a hybrid automatic repeat request HARQ is currently transmitted when new data needs to be uplink transmitted;
the determining module 802 is further configured to determine whether the number of transmission repetitions of the current HARQ is greater than or equal to a second threshold if the HARQ is currently being transmitted;
a sending module 802, configured to send an uplink scheduling request SR to a base station after the HARQ transmission is completed if the current HARQ transmission repetition number is greater than or equal to a second threshold.
In one possible design, the sending module 802 is further configured to:
and if the HARQ is not transmitted currently or the transmission repetition number of the current HARQ is less than a second threshold value, sending an uplink scheduling request SR to the base station.
The apparatus provided in this embodiment may be used to implement the technical solution of the method embodiment in fig. 5, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 7 is a third schematic structural diagram of an uplink scheduling apparatus according to an embodiment of the present invention. As shown in fig. 7, the uplink scheduling apparatus 90 includes: a determining module 901 and a processing module 902.
A determining module 901, configured to determine whether a hybrid automatic repeat request HARQ is currently transmitted when the uplink scheduling request SR is sent to the maximum number of times;
the determining module 901 is further configured to determine whether the number of transmission repetitions of the current HARQ is greater than or equal to a second threshold if the HARQ is currently being transmitted;
a processing module 902, configured to initiate random access to the base station after a preset time duration if the number of repetitions of the current HARQ is greater than or equal to a second threshold, where the preset time duration is determined according to a maximum number of repetitions of a PUSCH and a maximum number of retransmissions of the HARQ.
In one possible design, the processing module 902 is further configured to:
and if the HARQ is not transmitted currently or the transmission repetition number of the current HARQ is less than a second threshold value, initiating random access to the base station.
In one possible design, the preset time period T is determined according to the following formula:
Figure BDA0002010829880000141
wherein:
a is the maximum PUSCH repetition times and the maximum HARQ retransmission times, B is the uplink subframe number of 1 wireless frame, and C is a second preset offset value;
or,
a is the number of remaining repeated transmissions of the current HARQ transmission + (HARQ maximum retransmission-HARQ retransmitted number) × PUSCH maximum repetition number, B is the number of uplink subframes of 1 radio frame, and C is a second preset offset value.
The apparatus provided in this embodiment may be used to implement the technical solution of the method embodiment in fig. 6, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 8 is a schematic diagram of a hardware structure of a terminal according to an embodiment of the present invention. As shown in fig. 8, the terminal of the present embodiment includes: a processor and a memory; wherein,
a memory for storing computer execution instructions;
and the processor is used for executing the computer execution instructions stored in the memory so as to realize the steps executed by the receiving equipment in the embodiment. Reference may be made in particular to the description relating to the method embodiments described above.
Alternatively, the memory may be separate or integrated with the processor.
When the memory is separately provided, the terminal further includes a bus for connecting the memory and the processor.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer execution instruction is stored in the computer-readable storage medium, and when a processor executes the computer execution instruction, the uplink scheduling method is implemented as described above.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (12)

1. An uplink scheduling method is applied to a terminal, and the method comprises the following steps:
when new data is determined to need uplink transmission, configuring uplink scheduling parameters according to protocol regulations, wherein the uplink scheduling parameters comprise an uplink Scheduling Request (SR) period and the maximum SR sending times;
performing uplink scheduling according to the uplink scheduling parameters;
the product of the SR period and the SR maximum transmission times is greater than a first threshold, and the first threshold is the sum of the product of the Physical Uplink Shared Channel (PUSCH) maximum repetition times and the hybrid automatic repeat request (HARQ) maximum retransmission times and a first preset offset value.
2. The method according to claim 1, wherein the protocol comprises a maximum number of SR transmissions n and an SR transmission period;
wherein n comprises any one of the following values: 4. 8, 16, 32, 64, 128, 256, 512, 1024, 2048;
the SR transmission period includes any one of the following durations: 5. 10, 20, 40, 80, 2, 1, 160, 320, 640, 1280.
3. An uplink scheduling method is applied to a terminal, and the method comprises the following steps:
when new data needs to be transmitted in an uplink, determining whether hybrid automatic repeat request (HARQ) is transmitted currently;
if the HARQ is transmitted currently, determining whether the transmission repetition times of the current HARQ is greater than or equal to a second threshold value;
and if the current HARQ transmission repetition number is greater than or equal to a second threshold, sending an uplink Scheduling Request (SR) to a base station after the HARQ transmission is finished.
4. The method of claim 3, further comprising:
and if the HARQ is not transmitted currently or the transmission repetition number of the current HARQ is less than a second threshold value, sending an uplink scheduling request SR to the base station.
5. An uplink scheduling method is applied to a terminal, and the method comprises the following steps:
when the uplink scheduling request SR is sent to the maximum number of times, determining whether a hybrid automatic repeat request HARQ is transmitted currently;
if the HARQ is transmitted currently, determining whether the transmission repetition times of the current HARQ is greater than or equal to a second threshold value;
and if the current HARQ transmission repetition number is greater than or equal to a second threshold, initiating random access to the base station after a preset time length, wherein the preset time length is determined according to the physical uplink shared channel PUSCH maximum repetition number and the hybrid automatic repeat request HARQ maximum retransmission number.
6. The method of claim 5, further comprising:
and if the HARQ is not transmitted currently or the transmission repetition number of the current HARQ is less than a second threshold value, initiating random access to the base station.
7. The method according to claim 5 or 6, wherein the preset time period T is determined according to the following formula:
Figure FDA0002010829870000021
wherein:
a is the maximum PUSCH repetition times and the maximum HARQ retransmission times, B is the uplink subframe number of 1 wireless frame, and C is a second preset offset value;
or,
a is the number of remaining repeated transmissions of the current HARQ transmission + (HARQ maximum retransmission-HARQ retransmitted number) × PUSCH maximum repetition number, B is the number of uplink subframes of 1 radio frame, and C is a second preset offset value.
8. An uplink scheduling apparatus, comprising:
the configuration module is used for configuring uplink scheduling parameters according to protocol regulations when determining that new data needs to be subjected to uplink transmission, wherein the uplink scheduling parameters comprise an uplink Scheduling Request (SR) period and the maximum SR sending times;
the processing module is used for carrying out uplink scheduling according to the uplink scheduling parameters;
the product of the SR period and the SR maximum transmission times is greater than a first threshold, and the first threshold is the sum of the product of the Physical Uplink Shared Channel (PUSCH) maximum repetition times and the hybrid automatic repeat request (HARQ) maximum retransmission times and a first preset offset value.
9. An uplink scheduling apparatus, comprising:
a determining module, configured to determine whether a hybrid automatic repeat request HARQ is currently transmitted when new data needs to be uplink transmitted;
the determining module is further configured to determine whether the number of transmission repetitions of the current HARQ is greater than or equal to a second threshold, if the HARQ is currently being transmitted;
and the sending module is used for sending an uplink scheduling request SR to the base station after the HARQ transmission is finished if the current HARQ transmission repetition times is greater than or equal to a second threshold value.
10. An uplink scheduling apparatus, comprising:
the determining module is used for determining whether hybrid automatic repeat request (HARQ) is transmitted currently or not when the uplink Scheduling Request (SR) is sent to the maximum times;
the determining module is further configured to determine whether the number of transmission repetitions of the current HARQ is greater than or equal to a second threshold, if the HARQ is currently being transmitted;
and the processing module is used for initiating random access to the base station after a preset time length if the repetition frequency of the current HARQ is greater than or equal to a second threshold, wherein the preset time length is determined according to the maximum repetition frequency of a Physical Uplink Shared Channel (PUSCH) and the maximum retransmission frequency of a hybrid automatic repeat request (HARQ).
11. A terminal, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the uplink scheduling method of any of claims 1-7.
12. A computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the uplink scheduling method according to any one of claims 1 to 7 is implemented.
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