CN108811148B - Uplink transmission method, device, base station and user equipment of URLLC service - Google Patents
Uplink transmission method, device, base station and user equipment of URLLC service Download PDFInfo
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- CN108811148B CN108811148B CN201710312220.1A CN201710312220A CN108811148B CN 108811148 B CN108811148 B CN 108811148B CN 201710312220 A CN201710312220 A CN 201710312220A CN 108811148 B CN108811148 B CN 108811148B
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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
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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
- 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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
Abstract
The invention provides an uplink transmission method, an uplink transmission device, a base station and user equipment of a URLLC service. On the base station side, the method comprises: receiving URLLC service data sent by UE in a scheduling-free mode; decoding URLLC service data; when decoding fails and URLLC service data sent by the UE is initial transmission data, determining retransmission times of the UE based on scheduling; and when the retransmission times are more than 0, sending the scheduling information and the retransmission times to the UE. On the UE side, the method comprises: sending initial transmission data of the URLLC service to a base station in a scheduling-free mode; receiving scheduling information and retransmission times sent by a base station when decoding of initial transmission data of the URLLC service fails; and carrying out data retransmission based on scheduling according to the scheduling information and the retransmission times until receiving confirmation feedback of the base station or the data retransmission reaches the retransmission times. The invention can dynamically determine the retransmission times of the UE based on scheduling and improve the spectrum efficiency.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to an uplink transmission method and apparatus for a URLLC service, a base station, and a user equipment.
Background
URLLC (Ultra Reliability and Low Latency Communication) is a 5G application scenario defined by 3GPP (3rd Generation Partnership Project). The URLLC service has the characteristics of burstiness, sparsity and small data packets, and has very strict requirements on delay and reliability. In order to meet the requirement, more spectrum resources need to be allocated to the URLLC service and multiple retransmissions need to be supported as much as possible, so that the URLLC service can complete high-reliability transmission within strict time delay requirements. The Control channel of URLLC service also has very strict requirements on reliability, and NR (New Radio, New air interface) supports simplified DCI (Downlink Control Information) to obtain high reliability. Such simplified DCI requires a reduction in the number of bits indicating information of resource allocation, MCS, and the like.
For an uplink URLLC service, after the service arrives, a scheduling-based manner is adopted, a UE (User Equipment) needs to send a scheduling request to a base station, the base station receives the scheduling request and then sends information such as scheduling resources, MCS (Modulation Coding Scheme ), and the like to the UE, and then after receiving the scheduling information, the UE adopts an assigned MCS (data is sent in an assigned time-frequency resource, the scheduling-based manner can avoid time-frequency resource conflict, but scheduling delay is introduced, the URLLC service has a very strict requirement on delay, and in order to reduce delay and improve spectrum efficiency, the uplink URLLC service generally adopts a contention-based non-scheduling manner.
When a contention-based scheduling-free mode is adopted, the UE needs to configure MCS and spectrum resources in advance. All UEs use the same MCS and share spectrum resources. When a URLLC service arrives, the UE will use the preconfigured MCS to send data on the shared spectrum resource without sending a scheduling request to the base station. Since multiple UEs share the same spectrum resource, collision may occur when multiple UEs transmit data simultaneously on the same spectrum resource. In order to improve reliability of the URLLC service, when a contention-based scheduling-free mode is adopted, data may be continuously transmitted for multiple times until ACK (Acknowledgement) feedback from the base station is received. In order to avoid collision and improve reliability, the data can be retransmitted in a scheduling-based manner on the basis that the contention-based scheduling-free manner is adopted for initial transmission.
When the base station fails to decode the initially transmitted data sent by the UE, the base station can schedule resources for the UE to retransmit the data, and after receiving the scheduling information of the base station, the UE switches from a scheduling-free mode to a scheduling-based mode to retransmit the data. Scheduling based retransmissions may avoid conflicts with resources of other UEs. The scheduled retransmission may also be transmitted multiple times in succession to increase the decoding success rate of the data.
In the scheme of combining contention-based scheduling-free initial transmission with scheduling-based retransmission, as shown in fig. 1, the entire frequency band is divided into two parts, namely a scheduling-free frequency band and a scheduling-based frequency band. The schedule-free band, which is shared by all UEs, is used for initial K consecutive transmissions on a contention basis. The scheduling-free frequency band may be further subdivided, in fig. 1, the scheduling-free frequency band is divided into four parts, and when the UE needs to transmit data, the UE selects one of the four parts to perform data transmission. The frequency band based on scheduling is used for L retransmissions based on scheduling, and the frequency band may also be further subdivided, in fig. 1, the frequency band based on scheduling is divided into two parts, and when the base station schedules retransmission resources for the UE, one part is selected and allocated to the UE for L retransmissions.
In the process of implementing the invention, the inventor finds that at least the following technical problems exist in the prior art:
in the current scheme of combining contention-based scheduling-free initial transmission with scheduling-based retransmission, the number of retransmissions L based on scheduling is fixed, and the scheduling-based spectrum resource division needs to consider the worst condition, i.e. the situation that there are many UEs that need to be retransmitted. When the number of UEs requiring retransmission is small, the spectrum resources based on scheduling cannot be fully utilized, resulting in low spectrum efficiency.
Disclosure of Invention
The uplink transmission method, the device, the base station and the user equipment of the URLLC service can dynamically determine the retransmission times of the UE based on scheduling, thereby improving the spectrum efficiency.
In a first aspect, the present invention provides an uplink transmission method for URLLC service, where the method is applied to a base station, and the method includes:
receiving URLLC service data sent by UE in a scheduling-free mode;
decoding the URLLC service data;
when decoding fails and the URLLC service data sent by the UE is initially transmitted data, determining retransmission times of the UE based on scheduling;
and when the retransmission times are more than 0, sending scheduling information and the retransmission times to the UE so that the UE can carry out scheduling-based data retransmission according to the scheduling information and the retransmission times.
Optionally, the determining the number of retransmissions of the UE based on the scheduling includes: and determining the retransmission times of the UE based on the scheduling according to one or more of the signal-to-interference-and-noise ratio of the initial transmission data, the use condition of the resources based on the scheduling and the number of the users needing to be scheduled at the same time.
In a second aspect, the present invention provides another uplink transmission method for URLLC service, where the method is applied to a user equipment, and the method includes:
sending initial transmission data of the URLLC service to a base station in a scheduling-free mode;
receiving scheduling information and retransmission times sent by a base station when decoding of the initial transmission data of the URLLC service fails;
and carrying out data retransmission based on scheduling according to the scheduling information and the retransmission times until receiving confirmation feedback sent by the base station or the data retransmission reaches the retransmission times.
Optionally, the retransmission number is determined by the base station according to one or more of the signal to interference plus noise ratio of the initially transmitted data, the use condition of resources based on scheduling, and the number of users needing scheduling at the same time.
Optionally, the method further comprises:
and when the scheduling information and the retransmission times which are sent by the base station when the decoding of the initial transmission data of the URLLC service fails are not received, continuously sending the URLLC service data to the base station in a scheduling-free mode until the acknowledgement feedback sent by the base station is received or the continuous sending times reach the preset times.
In a third aspect, the present invention provides an uplink transmission apparatus for URLLC service, where the apparatus is located in a base station, and the apparatus includes:
the first receiving unit is used for receiving URLLC service data sent by the UE in a scheduling-free mode;
a decoding unit, configured to decode the URLLC service data;
a determining unit, configured to determine, when the decoding by the decoding unit fails and the URLLC service data sent by the UE is initially transmitted data, a number of retransmissions of the UE based on scheduling;
and the first sending unit is used for sending the scheduling information and the retransmission times to the UE when the retransmission times are larger than 0 so that the UE can carry out data retransmission based on scheduling according to the scheduling information and the retransmission times.
Optionally, the determining unit is configured to determine the number of retransmissions of the UE based on the scheduling according to one or more of the signal to interference plus noise ratio of the initially transmitted data, the use condition of the resource based on the scheduling, and the number of users that need to be scheduled at the same time.
In a fourth aspect, the present invention provides another uplink transmission apparatus for URLLC service, where the apparatus is located in a user equipment, and the apparatus includes:
the second sending unit is used for sending initial transmission data of the URLLC service to the base station in a scheduling-free mode;
a second receiving unit, configured to receive scheduling information and retransmission times that are sent by a base station when decoding of initially transmitted data of the URLLC service fails;
and the retransmission unit is used for carrying out data retransmission based on scheduling according to the scheduling information and the retransmission times until receiving confirmation feedback sent by the base station or the data retransmission reaches the retransmission times.
Optionally, the retransmission number is determined by the base station according to one or more of the signal to interference plus noise ratio of the initially transmitted data, the use condition of resources based on scheduling, and the number of users needing scheduling at the same time.
Optionally, the apparatus further comprises:
and the third sending unit is used for continuously sending the URLLC service data to the base station in a scheduling-free mode when the scheduling information and the retransmission times which are sent by the base station when the initial transmission data of the URLLC service are failed to be decoded are not received until the acknowledgement feedback sent by the base station is received or the continuous sending times reach the preset times.
In a fifth aspect, the present invention provides a base station, where the base station includes the above uplink transmission apparatus for URLLC service located at the base station.
In a sixth aspect, the present invention provides a user equipment, where the user equipment includes the above uplink transmission apparatus located in the URLLC service of the user equipment.
According to the uplink transmission method, the uplink transmission device, the base station and the user equipment of the URLLC service provided by the embodiment of the invention, the UE sends the URLLC service data to the base station by adopting a scheduling-free initial transmission mode and a scheduling-based retransmission mode, and the retransmission times based on scheduling are dynamically determined by the base station and are notified to the UE. Compared with the prior art, the invention can dynamically determine the retransmission times based on scheduling in a more flexible mode, thereby improving the spectrum efficiency.
Drawings
FIG. 1 is a schematic diagram of scheduling-free frequency band and frequency spectrum resource division based on the scheduled frequency band;
fig. 2 is a flowchart of an uplink transmission method of URLLC service according to an embodiment of the present invention;
fig. 3 is a flowchart of an uplink transmission method of URLLC service according to another embodiment of the present invention;
fig. 4 is a flowchart of an uplink transmission method of URLLC service according to still another embodiment of the present invention;
fig. 5 is a flowchart of an uplink transmission method of URLLC service according to another embodiment of the present invention;
fig. 6 is a schematic time slot diagram in an uplink transmission method of URLLC service according to still another embodiment of the present invention;
fig. 7 is a schematic structural diagram of an uplink transmission apparatus for URLLC service in an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an uplink transmission apparatus for URLLC service in another embodiment of the present invention;
fig. 9 is a schematic structural diagram of an uplink transmission apparatus for URLLC service according to still another 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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
An embodiment of the present invention provides an uplink transmission method for a URLLC service, where the method is applied to a base station, and as shown in fig. 2, the method includes:
and S21, the base station receives URLLC service data sent by the UE in a scheduling-free mode.
And S22, the base station decodes the URLLC service data.
And S23, when the decoding fails and the URLLC service data sent by the UE is initial transmission data, the base station determines the retransmission times of the UE based on scheduling.
Specifically, the base station may determine the number of retransmissions of the UE based on scheduling according to one or more of the signal to interference plus noise ratio of the initially transmitted data, the usage of resources based on scheduling, and the number of users that need to be scheduled at the same time.
S24, when the retransmission times is larger than 0, the base station sends the scheduling information and the retransmission times to the UE, so that the UE carries out data retransmission based on scheduling according to the scheduling information and the retransmission times.
The base station may send the scheduling information and the retransmission times to the UE through the simplified DCI, where the retransmission and the initial transmission use the same bandwidth and MCS.
In the uplink transmission method of the URLLC service provided in the embodiments of the present invention, when a base station fails to decode URLLC service data sent by a scheduling-free manner to a UE and the URLLC service data is initially transmitted data, a retransmission number of the UE based on scheduling is determined according to one or more of a signal-to-interference-and-noise ratio of the initially transmitted data, a use condition of resources based on scheduling, and a number of users that need to be scheduled at the same time, and when the retransmission number is greater than 0, scheduling information and the retransmission number are sent to the UE, so that the UE performs data retransmission based on scheduling according to the scheduling information and the retransmission number. Compared with the prior art, the invention can dynamically determine the retransmission times based on scheduling in a more flexible mode, thereby improving the spectrum efficiency.
An embodiment of the present invention provides another uplink transmission method for a URLLC service, where the method is applied to a user equipment, and as shown in fig. 3, the method includes:
and S31, the UE sends initial transmission data of the URLLC service to the base station in a scheduling-free mode.
S32, the UE receives the scheduling information and the retransmission times sent by the base station when the initial transmission data of the URLLC service fails to be decoded.
Specifically, the retransmission number is determined by the base station according to one or more of the signal to interference plus noise ratio of the initially transmitted data, the use condition of resources based on scheduling, and the number of users needing scheduling at the same time.
The UE may receive scheduling information and retransmission times sent by the base station through the simplified DCI, where the retransmission and the initial transmission use the same bandwidth and MCS.
And S33, the UE retransmits the data based on the scheduling according to the scheduling information and the retransmission times until receiving the confirmation feedback sent by the base station or the data retransmission reaches the retransmission times.
Further, when the UE does not receive scheduling information and retransmission times sent by the base station when decoding of the initial transmission data of the URLLC service fails, the UE continuously sends the URLLC service data to the base station in a scheduling-free mode until receiving confirmation feedback sent by the base station or the continuous sending times reach the preset times.
In the uplink transmission method of the URLLC service provided in the embodiments of the present invention, the UE sends URLLC service data to the base station by using a scheduling-free initial transmission mode in combination with a scheduling-based retransmission mode, and the number of retransmissions based on scheduling is dynamically determined and notified to the UE by the base station according to one or more of the signal-to-interference-and-noise ratio of the initial transmission data, the use condition of resources based on scheduling, and the number of users that need to be scheduled at the same time. Compared with the prior art, the invention can dynamically determine the retransmission times based on scheduling in a more flexible mode, thereby improving the spectrum efficiency.
Specifically, in the uplink transmission method of the URLLC service in the embodiment of the present invention, as shown in fig. 4, the flow at the base station side is as follows:
after receiving URLLC service data sent by the UE, the base station sends ACK to the UE if decoding is successful; if the decoding fails and the transmission is initial transmission, the base station determines the retransmission times L of the UE based on the scheduling, and if the L is greater than 0, the base station sends the scheduling information and the retransmission times to the UE through DCI; if L is equal to 0, the base station does not transmit scheduling information to the UE.
Specifically, in the uplink transmission method of the URLLC service in the embodiment of the present invention, as shown in fig. 5, the flow at the UE side is as follows:
and after the URLLC service is achieved, the UE sends URLLC service data to the base station in a scheduling-free mode, the scheduling-free continuous transmission frequency is K, and the K value is configured by the base station in a semi-static mode.
In the process that the UE continuously transmits data to the base station for K times in a scheduling-free mode, if the UE receives ACK sent by the base station or the transmission times reach K times, the transmission is finished; and if the UE receives scheduling information and retransmission times sent by the base station, the UE is switched from a scheduling-free mode to a scheduling-based mode, and data retransmission is carried out on the base station in the scheduling-based mode according to the scheduling information and the retransmission times L.
In the process that the UE transmits data to the base station for L times continuously in a scheduling-based mode, if the UE receives ACK sent by the base station or the number of times of transmission based on scheduling reaches L times, the transmission is finished.
The following describes in detail an uplink transmission method of URLLC service according to an embodiment of the present invention with reference to specific examples.
The uplink URLLC service uses 60kHz SCS (Sub-Carrier Spacing), 7 OFDM (Orthogonal Frequency-Division Multiplexing) symbols. Each slot is 0.125 milliseconds in length. The delay requirement of URLLC traffic is 1 ms, and the delay requirement of 1 ms requires that URLLC traffic can be transmitted up to 6 times, as shown in fig. 6.
The initial transmission of the URLLC service adopts a scheduling-free mode to carry out K times of continuous transmission, wherein K is equal to 6 and is the same as the maximum transmission times. And the base station decodes after receiving the data sent by the UE, if the decoding is successful, ACK is fed back to the UE, and the UE stops transmission after receiving the ACK feedback. If the decoding fails and the transmission is an initial transmission, the base station determines the number of retransmissions L for the UE based on the scheduling.
The base station may determine the value of L according to one or more factors of SINR (Signal to Interference and Noise Ratio) of the initially transmitted data, usage of the entire resource based on scheduling, number of scheduled users, and other factors.
For example: when the value of L is determined according to the SINR of the initial transmission data, the following method may be adopted:
if the SINR is>θ0，L＝0；
If theta1<SINR<＝θ0，L＝1；
If theta2<SINR<＝θ1，L＝2；
If the SINR is<＝θ2，L＝3；
Wherein theta is0>θ1>θ2，θ0、θ1And theta2Is set by the base station.
For example: when the value of L is determined according to the usage of the entire resource based on scheduling, the following method may be adopted:
the proportion of the total schedulable resources of a certain UE that have been allocated to other UEs is alpha,
if α is>α0，L＝0；
If α is1<α<＝α0，L＝1；
If α is2<α<＝α1，L＝2；
If α is<＝α2，L＝3；
Wherein alpha is0>α1>α2，α0、α1And alpha2Is set by the base station.
If L is greater than 0, the base station sends the scheduling information and the retransmission times to the UE through DCI; if L is equal to 0, the base station does not transmit scheduling information to the UE.
For example: when the value of L is determined according to the SINR of the initial transmission data and the usage of the entire resource based on scheduling, the following method may be adopted:
1. determining a group of parameters of the whole resource occupation ratio alpha based on scheduling according to different SINR values:
if the SINR is>θ0The parameter of alpha is alpha00、α01And alpha02；
If the SINR is<＝θ0The parameter of alpha is alpha10、α11And alpha12；
Wherein alpha is00>α01>α02，α10>α11>α12，θ0、α00、α01、α02，α10、α11And alpha12Is set by the base station.
2. Determining the parameter of alpha and further determining the value of L:
if the SINR is>θ0，
If α is>α00，L＝0；
If α is01<α<＝α00，L＝1；
If α is02<α<＝α01，L＝2；
If α is<＝α02，L＝3；
If the SINR is<＝θ0，
If α is>α10，L＝0；
If α is11<α<＝α10，L＝1；
If α is12<α<＝α11，L＝2；
If α is<＝α12，L＝3；
In the above three examples, the base station may determine the SINR and/or the α related parameters according to the number of different users that need to be scheduled at the same time, where the larger the number of users that need to be scheduled at the same time, the smaller the value of L, and conversely, the larger the value of L.
In the process that the UE continuously transmits data to the base station for K times in a scheduling-free mode, if the UE receives ACK sent by the base station or the transmission times reach K times, the transmission is finished; and if the UE receives scheduling information and retransmission times sent by the base station, the UE is switched from a scheduling-free mode to a scheduling-based mode, and data retransmission is carried out on the base station in the scheduling-based mode according to the scheduling information and the retransmission times L.
In the process that the UE transmits data to the base station for L times continuously in a scheduling-based mode, if the UE receives ACK sent by the base station or the number of times of transmission based on scheduling reaches L times, the transmission is finished.
An embodiment of the present invention further provides an uplink transmission apparatus for URLLC service, where the apparatus is located in a base station, as shown in fig. 7, the apparatus includes:
a first receiving unit 21, configured to receive URLLC service data sent by a UE in a scheduling-free manner;
a decoding unit 22, configured to decode the URLLC service data;
a determining unit 23, configured to determine, when the decoding by the decoding unit 22 fails and the URLLC service data sent by the UE is initially transmitted data, a number of retransmissions of the UE based on scheduling;
a first sending unit 24, configured to send the scheduling information and the retransmission times to the UE when the retransmission times is greater than 0, so that the UE performs scheduling-based data retransmission according to the scheduling information and the retransmission times.
According to the uplink transmission device of the URLLC service provided by the embodiment of the invention, when the decoding of the URLLC service data sent by the base station in a scheduling-free mode to the UE fails and the URLLC service data is the initial transmission data, the retransmission times of the UE based on scheduling are determined, and when the retransmission times are more than 0, the scheduling information and the retransmission times are sent to the UE, so that the UE carries out data retransmission based on scheduling according to the scheduling information and the retransmission times. Compared with the prior art, the invention can dynamically determine the retransmission times based on scheduling in a more flexible mode, thereby improving the spectrum efficiency.
Optionally, the determining unit 23 is configured to determine the number of retransmissions of the UE based on scheduling according to one or more of the signal to interference plus noise ratio of the initially transmitted data, the usage of resources based on scheduling, and the number of users that need to be scheduled at the same time.
The apparatus of this embodiment may be configured to execute the technical solution of the method embodiment applied to the base station side, and the implementation principle and the technical effect are similar, which are not described herein again.
An embodiment of the present invention further provides another uplink transmission apparatus for URLLC service, where the apparatus is located in a user equipment, as shown in fig. 8, the apparatus includes:
a second sending unit 31, configured to send URLLC initial transmission data to the base station in a scheduling-free manner;
a second receiving unit 32, configured to receive scheduling information and retransmission times that are sent by a base station when decoding of initially transmitted data of the URLLC service fails;
and a retransmission unit 33, configured to perform data retransmission based on scheduling according to the scheduling information and the retransmission times until receiving acknowledgement feedback sent by the base station or the data retransmission reaches the retransmission times.
In the uplink transmission method of the URLLC service provided in the embodiments of the present invention, the UE sends URLLC service data to the base station by using a scheduling-free initial transmission mode in combination with a scheduling-based retransmission mode, and the number of retransmissions based on scheduling is dynamically determined and notified to the UE by the base station according to one or more of the signal-to-interference-and-noise ratio of the initial transmission data, the use of resources based on scheduling, and the number of scheduled users. Compared with the prior art, the invention can dynamically determine the retransmission times based on scheduling in a more flexible mode, thereby improving the spectrum efficiency.
Optionally, the retransmission number is determined by the base station according to one or more of the signal to interference plus noise ratio of the initially transmitted data, the use condition of resources based on scheduling, and the number of users needing scheduling at the same time.
Optionally, as shown in fig. 9, the apparatus further includes:
and a third sending unit 34, configured to, when scheduling information and retransmission times sent by the base station when decoding of the initial URLLC service data fails are not received, continuously send URLLC service data to the base station in a scheduling-free manner until acknowledgement feedback sent by the base station is received or the continuous sending times reach a predetermined number.
The apparatus of this embodiment may be configured to execute the technical solution of the method embodiment applied to the ue side, and the implementation principle and the technical effect are similar, which are not described herein again.
The embodiment of the invention also provides a base station, which comprises the uplink transmission device of the URLLC service positioned in the base station.
The embodiment of the invention also provides the user equipment, which comprises the uplink transmission device of the URLLC service positioned in the user equipment.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. An uplink transmission method for URLLC service, said method being applied to a base station, characterized in that said method comprises:
receiving URLLC service data sent by UE in a scheduling-free mode;
decoding the URLLC service data;
when decoding fails and the URLLC service data sent by the UE is initially transmitted data, determining retransmission times of the UE based on scheduling;
when the retransmission times are larger than 0, sending scheduling information and the retransmission times to the UE so that the UE can carry out scheduling-based data retransmission according to the scheduling information and the retransmission times;
wherein the determining the number of retransmissions of the UE based on the scheduling comprises: and determining the retransmission times of the UE based on the scheduling according to one or more of the signal-to-interference-and-noise ratio of the initial transmission data, the use condition of the resources based on the scheduling and the number of the users needing to be scheduled at the same time.
2. An uplink transmission method for URLLC service, said method being applied to user equipment, characterized in that said method comprises:
sending initial transmission data of the URLLC service to a base station in a scheduling-free mode;
receiving scheduling information and retransmission times sent by a base station when decoding of the initial transmission data of the URLLC service fails;
carrying out data retransmission based on scheduling according to the scheduling information and the retransmission times until receiving confirmation feedback sent by the base station or the data retransmission reaches the retransmission times;
and the retransmission times are determined by the base station according to one or more of the signal-to-interference-and-noise ratio of the initially transmitted data, the use condition of resources based on scheduling and the number of users needing scheduling at the same time.
3. The method of claim 2, further comprising:
and when the scheduling information and the retransmission times which are sent by the base station when the decoding of the initial transmission data of the URLLC service fails are not received, continuously sending the URLLC service data to the base station in a scheduling-free mode until the acknowledgement feedback sent by the base station is received or the continuous sending times reach the preset times.
4. An uplink transmission apparatus for URLLC service, said apparatus being located at a base station, said apparatus comprising:
the first receiving unit is used for receiving URLLC service data sent by the UE in a scheduling-free mode;
a decoding unit, configured to decode the URLLC service data;
a determining unit, configured to determine, when the decoding by the decoding unit fails and the URLLC service data sent by the UE is initially transmitted data, a number of retransmissions of the UE based on scheduling;
a first sending unit, configured to send scheduling information and the retransmission times to the UE when the retransmission times are greater than 0, so that the UE performs scheduling-based data retransmission according to the scheduling information and the retransmission times;
the determining unit is configured to determine the number of retransmissions of the UE based on scheduling according to one or more of the signal-to-interference-and-noise ratio of the initially transmitted data, the use condition of the resource based on scheduling, and the number of users that need to be scheduled at the same time.
5. An uplink transmission apparatus for URLLC service, said apparatus being located at a user equipment, said apparatus comprising:
the second sending unit is used for sending initial transmission data of the URLLC service to the base station in a scheduling-free mode;
a second receiving unit, configured to receive scheduling information and retransmission times that are sent by a base station when decoding of initially transmitted data of the URLLC service fails;
a retransmission unit, configured to perform data retransmission based on scheduling according to the scheduling information and retransmission times until receiving a confirmation feedback sent by the base station or the data retransmission reaches the retransmission times;
and the retransmission times are determined by the base station according to one or more of the signal-to-interference-and-noise ratio of the initially transmitted data, the use condition of resources based on scheduling and the number of users needing scheduling at the same time.
6. The apparatus of claim 5, further comprising:
and the third sending unit is used for continuously sending the URLLC service data to the base station in a scheduling-free mode when the scheduling information and the retransmission times which are sent by the base station when the initial transmission data of the URLLC service are failed to be decoded are not received until the acknowledgement feedback sent by the base station is received or the continuous sending times reach the preset times.
7. A base station, characterized in that the base station comprises an uplink transmission means of URLLC traffic as claimed in claim 4.
8. A user equipment, characterized in that it comprises means for upstream transmission of URLLC traffic as claimed in claim 5 or 6.
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