CN109428680B

CN109428680B - Method and device for transmitting or receiving uplink data

Info

Publication number: CN109428680B
Application number: CN201711479356.8A
Authority: CN
Inventors: 杜振国; 庄宏成; 韩云博; 丁志明
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-08-24
Filing date: 2017-12-29
Publication date: 2020-09-25
Anticipated expiration: 2037-12-29
Also published as: CN109428680A

Abstract

The application provides a method for sending uplink data, which comprises the following steps: the terminal equipment determines N according to reference information, wherein N is the transmission times of the transmission block, the reference information and N have a preset corresponding relation, and N is an integer greater than or equal to 1; and the terminal equipment sends N uplink data according to an authorization-free transmission mode, wherein the N uplink data comprise one initial transmission data and N-1 retransmission data of the transmission block. For example, the terminal device may determine N from a value set, where the value set is information preset in the terminal device, and when the terminal device has a transmission block to be transmitted, the terminal device may select a value from the value set according to reference information, where the value represents the number of times of transmission, and the number of times of transmission may be different under different reference information, so that resources occupied by the unlicensed transmission may be reduced without affecting a reception success rate.

Description

Method and device for transmitting or receiving uplink data

Technical Field

The present application relates to the field of communications, and in particular, to a method and an apparatus for transmitting or receiving uplink data in the field of wireless communications.

Background

The grant-free (also known as transmission with grant or grant-less or grantless) transmission is the fifth generation (5)^thgeneration, 5G) mobile communication system, in the authorization-free transmission, the terminal device can directly send uplink information without waiting for the scheduling information of the network device, thus having the characteristic of short delay.

Since the resources used by each terminal device to send the uplink information in the unlicensed transmission are selected by each terminal device, different terminal devices may select the same resources to send the uplink information, and in this case, the network device cannot correctly receive the uplink information. However, this method has a disadvantage of occupying a large amount of resources, and how to reduce the resources occupied by the unlicensed transmission without affecting the success rate of reception is a problem that needs to be solved at present.

Disclosure of Invention

The device for sending the uplink data can determine the transmission times of the authorization-free transmission based on the reference information, when the reference information indicates that the current transmission success probability is higher, the device for sending the uplink data can reduce the transmission times of the authorization-free transmission, and when the reference information indicates that the current transmission success probability is lower, the device for sending the uplink data can increase the transmission times of the authorization-free transmission, so that resources occupied by the authorization-free transmission can be reduced on the premise of not influencing the receiving success rate.

In a first aspect, a method for sending uplink data is provided, including: the terminal equipment determines N according to reference information, wherein N is the transmission times of the transmission block, the reference information and N have a preset corresponding relation, and N is an integer greater than or equal to 1; the terminal device sends N uplink data in an unlicensed transmission mode, where the N uplink data include one initial transmission data and N-1 retransmission data of the transmission block (it can also be understood that the terminal device sends the transmission block N times in the unlicensed transmission mode).

In a possible implementation manner, N may be a value in a value set, where the value set may be information preset in a terminal device, and when the terminal device has a transmission block that needs to be transmitted, the terminal device may select a value from the value set according to reference information, where the value represents the transmission times of the transmission block, and the transmission times may be different under different reference information, for example, when the reference information indicates that a current communication environment is better or a reliability requirement of current transmission is not high, the terminal device may reduce the transmission times of the unlicensed transmission, and when the reference information indicates that the current communication environment is worse or the reliability requirement of current transmission is higher, the terminal device may increase the transmission times of the unlicensed transmission, so that resources occupied by the unlicensed transmission may be reduced on the premise of not affecting a reception success rate.

Optionally, N is less than or equal to K, K is a preset maximum transmission number, and K is an integer greater than or equal to 1.

The network device or the communication protocol may specify the maximum transmission times of the terminal device for the unlicensed transmission, so as to avoid resource waste caused by too many resources occupied by the terminal device and avoid transmission reliability reduction caused by reduction of available resources of other terminal devices of the current communication system.

Optionally, the reference information includes a channel quality and/or a traffic type of the transport block.

The transmission frequency may be a small value when the channel quality is good, and a large value when the channel quality is poor; when the service type of the transmission block has a low requirement on transmission reliability, the transmission frequency can be a small value, and when the service type of the transmission block has a high requirement on transmission reliability, the transmission frequency can be a large value; the channel quality and the service type of the transmission block can be comprehensively considered, and a proper numerical value is selected from the numerical value set, so that the transmission reliability can be ensured, and the resource utilization rate can be improved.

Optionally, the reference information includes a Modulation and Coding Scheme (MCS).

Different MCSs can correspond to different transmission times, for example, under the same condition, when the channel quality is better, the transmission reliability is higher, higher transmission rate can be used to send uplink data, when the channel quality is poorer, the transmission reliability is lower, and lower transmission rate can be used to send uplink data, therefore, the MCS with higher transmission rate can correspond to smaller transmission times, and the MCS with higher transmission rate can correspond to larger transmission times, so that the resource utilization rate can be improved while the transmission reliability is ensured.

Optionally, before the terminal device determines N according to the MCS, the method further includes: the terminal equipment determines a target authorization-free transmission resource from at least two authorization-free transmission resources according to the channel quality and/or the service type of the transmission block, wherein the target authorization-free transmission resource is used for transmitting the transmission block; and the terminal equipment determines the MCS according to the target authorization-free transmission resource, and the target authorization-free transmission resource and the MCS have a preset corresponding relationship.

The MCS may be bound to the unlicensed transmission resource, that is, when the terminal device selects to use the unlicensed transmission resource a to transmit uplink data, it is determined that the MCS used for transmitting the uplink data is the MCS bound to the unlicensed transmission resource a. The terminal device may select one unlicensed transmission resource from a plurality of unlicensed transmission resources according to the channel quality and/or the service type of the transport block, for example, when the channel quality is better, the unlicensed transmission resource with a higher transmission rate may be selected, and when the channel quality is worse, the unlicensed transmission resource with a lower transmission rate may be selected, so that a suitable transmission resource may be flexibly selected, and the resource utilization rate is improved while ensuring the transmission reliability.

Optionally, the reference information is an unlicensed transmission resource used for transmitting the transport block.

Different unlicensed transmission resources can correspond to different transmission times, for example, under the same condition, the reliability of the dedicated frequency band is higher than that of the common frequency band, so the transmission times corresponding to the dedicated frequency band can be a smaller value to reduce the resource usage amount, and the transmission times corresponding to the common frequency band can be a larger value to ensure the transmission reliability.

Optionally, before the terminal device determines N according to the unlicensed transmission resource used by the transmission transport block, the method further includes: the terminal equipment determines the authorization-free transmission resource used for sending the transmission block for N times from at least two authorization-free transmission resources according to the channel quality and/or the service type of the transmission block, the authorization-free transmission resource used for sending the transmission block for N times has a preset corresponding relation with the channel quality, and/or the authorization-free transmission resource used for sending the transmission block for N times has a preset corresponding relation with the service type of the transmission block.

For example, when the channel quality is good, the terminal device may select the unlicensed transmission resource with lower reliability, and when the channel quality is poor, the terminal device may select the unlicensed transmission resource with higher reliability; for another example, when the service type corresponding to the transmission block belongs to a high-priority service type, the terminal device may select the unlicensed transmission resource with higher reliability, and when the service type corresponding to the transmission block belongs to a low-priority service type, the terminal device may select the unlicensed transmission resource with lower reliability. The terminal device may also select the unlicensed transmission resources based on the channel quality and the traffic type of the transport block. Therefore, the method provided by the embodiment can determine the transmission times of the authorization-free transmission according to the current actual situation, thereby improving the resource utilization rate while ensuring the transmission reliability.

Optionally, before the terminal device determines N according to the reference information, the method further includes: and the terminal equipment receives configuration information, wherein the configuration information is used for configuring the corresponding relation between the reference information and the N.

The corresponding relation between the reference information and the transmission times can be configured in the terminal equipment in advance through the configuration information, the corresponding relation can be a result obtained by counting the relation between the communication reliability and the transmission times under different conditions through the network equipment, and the configuration content can be updated regularly, so that the terminal equipment can select the proper authorization-free transmission times, the transmission reliability is ensured, and the resource utilization rate is improved.

In a second aspect, a method for receiving uplink data is provided, including: the method comprises the steps that network equipment sends configuration information, the configuration information is used for configuring the corresponding relation between reference information and N, the N is the number of times that terminal equipment transmits a transmission block in an authorization-free transmission mode, the N is an integer larger than or equal to 0, and the corresponding relation between the reference information and the N is used for the terminal equipment to determine the N corresponding to the reference information according to the reference information; the network device receives N uplink data from the terminal device, wherein the N uplink data comprise initial transmission data and N-1 retransmission data of a transmission block.

The network device may configure a value set for the terminal device, where a value in the value set is a possible value of N, and when the terminal device needs to transmit a transmission block, the terminal device may select a value from the value set according to the reference information, where the value represents a transmission frequency, and the transmission frequencies may be different under different reference information, for example, when the reference information indicates that a current communication environment is good or a reliability requirement of current transmission is not high, the terminal device may reduce the transmission frequency of the unlicensed transmission, and when the reference information indicates that the current communication environment is poor or the reliability requirement of current transmission is high, the terminal device may increase the transmission frequency of the unlicensed transmission, so that resources occupied by the unlicensed transmission may be reduced without affecting a reception success rate.

The network device may ensure fairness of transmission between the terminal devices using the unlicensed transmission resource by configuring a maximum transmission number corresponding to the unlicensed transmission resource, for example, in a massive machine type communications (mtc) scenario, there is usually no emergency data, and the network device may set the maximum transmission number K, so as to ensure fairness of transmission between the terminal devices.

Optionally, the reference information includes at least one of a channel quality, a traffic type of the transport block, an MCS, and at least one unlicensed transmission resource that can be used for transmitting the transport block.

The network equipment can count the relation between the communication reliability and the transmission times in scenes with different channel qualities, determine the transmission times corresponding to the different channel qualities on the premise of meeting the requirement of the communication reliability according to the statistical result, and inform the terminal equipment of the corresponding relation between the channel qualities and the transmission times through configuration information, so that the terminal equipment can select proper transmission times according to the channel qualities, and the resource utilization rate can be improved while the transmission reliability is ensured.

The network device can also count the relation between the communication reliability and the transmission times in scenes with different service types, determine the transmission times corresponding to the different service types on the premise of meeting the requirement of the communication reliability according to the statistical result, and inform the corresponding relation between the service types and the transmission times to the terminal device through configuration information, so that the terminal device can select proper transmission times according to the service types corresponding to the transmission blocks, thereby improving the resource utilization rate while ensuring the transmission reliability.

The network equipment can also count the relation between the communication reliability and the transmission times in a scene of carrying out the authorization-free transmission by using different authorization-free transmission resources, determine the transmission times corresponding to the authorization-free transmission resources on the premise of meeting the communication reliability requirement according to the statistical result, and inform the corresponding relation between the authorization-free transmission resources and the transmission times to the terminal equipment through the configuration information, so that the terminal equipment can select the proper transmission times according to the authorization-free transmission resources, thereby improving the resource utilization rate while ensuring the transmission reliability.

The network equipment can also count the relation between the communication reliability and the transmission times in the scene of using different MCS for authorization-free transmission, determine the transmission times corresponding to the MCS on the premise of meeting the requirement of the communication reliability according to the statistical result, and inform the corresponding relation between the MCS and the transmission times to the terminal equipment through the configuration information, so that the terminal equipment can select the proper transmission times according to the MCS, thereby improving the resource utilization rate while ensuring the transmission reliability.

Optionally, the correspondence between the reference information and N includes: the method comprises the steps of obtaining a corresponding relation between channel quality and/or service type of a transmission block and a target authorization-free transmission resource, and obtaining a corresponding relation between the target authorization-free transmission resource and N, wherein the target authorization-free transmission resource is one of the at least one authorization-free transmission resource, and the target authorization-free transmission resource is an authorization-free transmission resource used for transmitting the transmission block.

The correspondence between the channel quality and/or the service type of the transmission block and N may also be an indirect correspondence, that is, there is a correspondence between the channel quality and/or the service type of the transmission block and the authorization-free transmission resource, and there is a correspondence between the authorization-free transmission resource and N, so that flexibility of determining the value of N by the terminal device is enhanced.

Optionally, the correspondence between the target unlicensed transmission resource and N includes: the corresponding relation between the transmission block and the free transmission resource and the corresponding relation between the MCS and the N.

The corresponding relation between the authorization-free transmission resource and the N can also be an indirect corresponding relation, so that the flexibility of the terminal equipment for determining the value of the N is enhanced.

In a third aspect, a device for sending uplink data is provided, where the device may implement the function executed by the terminal device in the method according to the first aspect, where the function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

In one possible design, the apparatus includes a processing unit and a communication unit, where the processing unit is configured to determine N according to reference information, where N is a transmission number of times that the apparatus for sending uplink data transmits a transport block, where the reference information and N have a preset corresponding relationship, and N is an integer greater than or equal to 1;

the communication unit is configured to send N uplink data in an authorization-free transmission manner, where the N uplink data include one initial transmission data and N-1 retransmission data of the transmission block.

In one embodiment, N is less than or equal to K, K is a preset maximum number of transmissions, and K is an integer greater than or equal to 1.

In one embodiment, the reference information includes at least one of a channel quality, a traffic type of the transport block, a modulation and coding scheme, MCS, and at least one unlicensed transmission resource usable for transmitting the transport block.

In one embodiment, the reference information comprises at least two unlicensed transmission resources available for transmission of the transport block; the processing unit is specifically configured to:

determining a target unlicensed transmission resource from the at least two unlicensed transmission resources according to the channel quality and/or the service type of the transmission block, where the target unlicensed transmission resource is an unlicensed transmission resource used for transmitting the transmission block;

and determining N according to the target unauthorized transmission resource, wherein a preset corresponding relation exists between the target unauthorized transmission resource and the N.

In one embodiment, the processing unit is configured to determine N according to the target unlicensed transmission resource, where a preset correspondence exists between the target unlicensed transmission resource and N, and the method includes:

the processing unit is specifically configured to determine the MCS according to the target unlicensed transmission resource, where a preset corresponding relationship exists between the target unlicensed transmission resource and the MCS;

and determining N according to the MCS, wherein a preset corresponding relation exists between the MCS and the N.

In one embodiment, the communication unit is further configured to, before the processing unit determines N from the reference information:

and receiving configuration information, wherein the configuration information is used for configuring the corresponding relation between the reference information and the N.

In another possible design, the apparatus includes a processor and a transceiver, and the processor is configured to support the apparatus to perform corresponding functions in the method according to the first aspect. The transceiver is for supporting communication between the apparatus and other network elements. The apparatus may also include a memory, coupled to the processor, that retains program instructions and data necessary for the apparatus. The functions implemented by the processor may refer to the functions implemented by the processing unit described above. The functions performed by the transceiver may refer to the functions performed by the communication unit described above.

In a fourth aspect, a device for receiving uplink data is provided, where the device may implement a function executed by a terminal device in the method according to the second aspect, where the function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

In one possible design, the apparatus includes a processing unit and a communication unit, the processing unit being configured to support the communication unit to perform:

sending configuration information, wherein the configuration information is used for configuring a corresponding relation between reference information and N, N is the number of times that a terminal device transmits a transmission block in an authorization-free transmission mode, and N is an integer greater than or equal to 1, and the corresponding relation between the reference information and N is used for the terminal device to determine N corresponding to the reference information according to the reference information;

and receiving N uplink data from the terminal equipment, wherein the N uplink data comprise initial transmission data and N-1 retransmission data of the transmission block.

In one embodiment, the reference information includes at least one of a channel quality, a traffic type of a transport block, a modulation and coding scheme, MCS, and at least one unlicensed transmission resource that can be used to transmit the transport block.

In one embodiment, the correspondence between the reference information and N includes:

the method comprises the steps of obtaining a corresponding relation between channel quality and/or a service type of a transmission block and a target unlicensed transmission resource, and obtaining a corresponding relation between the target unlicensed transmission resource and N, wherein the target unlicensed transmission resource is one of at least one unlicensed transmission resource, and the target unlicensed transmission resource is an unlicensed transmission resource used for transmitting the transmission block.

In one embodiment, the correspondence between the unlicensed transmission resource used for transmitting the transport block and N includes:

the corresponding relation between the grant-free transmission resource and the MCS and the corresponding relation between the MCS and N.

In another possible design, the apparatus includes a processor and a transceiver, and the processor is configured to support the apparatus to perform corresponding functions in the method according to the second aspect. The transceiver is for supporting communication between the apparatus and other network elements. The apparatus may also include a memory, coupled to the processor, that retains program instructions and data necessary for the apparatus. The functions implemented by the processor may refer to the functions implemented by the processing unit described above. The functions performed by the transceiver may refer to the functions performed by the communication unit described above.

In a fifth aspect, a network system is provided, where the network system includes the apparatus for transmitting uplink data in the third aspect and the apparatus for receiving the uplink data in the fourth aspect.

A sixth aspect provides a computer readable storage medium having stored therein computer program code which, when executed by a processing unit or processor, causes a terminal device to perform the method of the first aspect.

In a seventh aspect, a computer-readable storage medium is provided, in which computer program code is stored, which, when executed by a processing unit or processor, causes a network device to perform the method of the second aspect.

In an eighth aspect, a communication chip is provided, in which instructions are stored, which, when run on a terminal device, cause the communication chip to perform the method of the first aspect described above.

In a ninth aspect, there is provided a communication chip having instructions stored therein which, when run on a network device, cause the communication chip to perform the method of the second aspect described above.

In a tenth aspect, there is provided a computer program product comprising: computer program code which, when run by a communication unit or transceiver and a processing unit or processor of the terminal device, causes the terminal device to perform the method of the first aspect described above.

In an eleventh aspect, there is provided a computer program product comprising: computer program code which, when run by a communication unit or transceiver and a processing unit or processor of the network device, causes the network device to perform the method of the second aspect described above.

Drawings

FIG. 1 is a schematic diagram of a communication system suitable for use in the present application;

fig. 2 is a schematic diagram of a method for transmitting uplink data provided in the present application;

fig. 3 is a schematic diagram of a corresponding relationship between a signal-to-noise ratio and a transmission number provided in the present application;

fig. 4 is a schematic diagram of another method for transmitting uplink data provided in the present application;

fig. 5 is a schematic diagram of a corresponding relationship between an MCS and a transmission number provided in the present application;

fig. 6 is a schematic diagram of a corresponding relationship between MCS and unlicensed transmission resources and transmission times provided in the present application;

fig. 7 is a schematic diagram of an unlicensed transmission resource used for transmitting uplink data according to the present application;

fig. 8 is a schematic diagram of a method for receiving uplink data provided in the present application;

FIG. 9 is a schematic diagram of a possible terminal device provided by the present application;

FIG. 10 is a schematic diagram of another possible terminal device provided herein;

FIG. 11 is a schematic diagram of one possible network device provided herein;

FIG. 12 is a schematic diagram of another possible network device provided herein;

FIG. 13 is a schematic diagram of another communication system suitable for use in the present application;

FIG. 14 is a schematic diagram of one possible base station provided herein;

fig. 15 is a schematic diagram of a possible UE provided in the present application;

FIG. 16 is a diagram illustrating another SNR-to-TX ratio mapping provided herein;

fig. 17 is a schematic diagram of another method for transmitting uplink data provided in the present application;

FIG. 18 is a diagram illustrating another MCS versus transmission times provided by the present application;

fig. 19 is a schematic diagram of another MCS, unlicensed transmission resource and transmission times mapping relationship provided in the present application;

fig. 20 is a schematic diagram of another unlicensed transmission resource used for transmitting uplink data according to the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The english abbreviations and corresponding english full names and chinese translations used herein are as follows:

in a conventional cellular communication system (e.g., LTE), a Grant-based (Grant-based) manner is adopted in Uplink (UL) transmission, that is, a base station schedules resources for UL transmission of a UE and related transmission parameters, such as time domain, frequency domain, spatial domain resources and MCS used for UL transmission. In this case, when one UE has uplink data to send, a scheduling request is sent to the base station, the base station sends a scheduling grant based on the scheduling request, and then the UE performs UL transmission according to the resource allocation and the transmission parameters indicated in the scheduling grant. If the UE itself is in RRC _ IDLE state, the UE needs to perform random access (including the interactive process of four messages) first before transmitting data. In any case, the UL transmission procedure of Grant-based requires more signaling overhead, and the signaling overhead inevitably causes delay.

Currently, the 3GPP is setting up a fifth generation standard for cellular communications (5)^thGeneration, 5G), which includes mtc and URLLC in the scenario under consideration. Data generated by the mtc service is usually small data (that is, each data packet is small), and if a conventional Grant-based UL transmission mode is adopted, resources occupied by data transmission are far smaller than resources used by signaling interaction (such as signaling interaction in scheduling request and scheduling authorization process, or signaling interaction in random access process) before data transmission, which results in low resource utilization rate, and especially in the case of a large number of mtc devices, system resources will be largely occupied by interactive signaling; the URLLC service requires low latency, and the signaling interaction in the Grant-based UL transmission process is very delayed due to RRC signaling, so the conventional Grant-based UL transmission method is difficult to meet the requirements of the URLLC service.

For the above reasons, the 5G introduces a Grant-free (Grant-free) transmission scheme into nr (new radio) for UL transmission. The Grant-free transmission method is that when the UE has data to transmit, the UE does not need to request the base station for UL transmission resources, but selects one resource for UL transmission based on a certain rule from a Grant-free transmission resource pool pre-configured by the base station to directly perform UL transmission. Therefore, the signaling interaction in the UL transmission process of the Grant-based can be saved, thereby reducing the signaling overhead and the transmission delay, and being particularly suitable for packet transmission and delay sensitive services.

Currently, the 5G-NR standard has explicitly agreed that mMTC and URLLC support Grant-free transmission. In addition, the standard also determines the time frequency resource used by the base station to configure the Grant-free transmission, namely, the Grant-free transmission resource pool is configured.

In order to ensure the reliability of Grant-free transmission, the current 5G-NR standard has agreed that K retransmissions can be performed when Grant-free transmission is performed, and the value of K is configured by the network side. The K retransmissions may be K repetitions of the same redundancy version of the same data, i.e., the contents of the K transmissions are identical, e.g., RV0 for the transmissions are the same data; the K retransmissions may also be K different redundancy versions of the same data, i.e. the contents of the K transmissions are different from each other, e.g. RV0, RV1, RV2, … transmitted for the same data; the K retransmissions may also be a combination of the two manners, that is, the K retransmissions include both retransmission data and duplicate data, for example, RV0, RV0, RV1, RV1, and … that are transmitted as the same data. Note that the K retransmissions here are K transmissions including the initial transmission.

The network side can configure retransmission times K for the UE performing the Grant-free transmission, wherein the K is used for the whole cell or used for a group of UEs. However, the channel conditions may be different for different UEs, and the base station configured K may not be optimal for each UE. For example, if a UE with a better channel condition is configured with a larger K, the resource of Grant-free is wasted due to unnecessary retransmission, and interference is easily caused to Grant-free transmission of other UEs; if a UE with a poor channel condition is configured with a smaller K, the transmission reliability is reduced due to insufficient retransmission times. If the network side performs K configuration for each UE, the network side needs to continuously reconfigure K due to UE movement or channel change, which obviously brings a relatively large signaling overhead.

Fig. 1 shows a communication system suitable for use in the present application. The communication system comprises a network device and a terminal device, wherein the network device and the terminal device communicate through a wireless network, when the terminal device sends information, a wireless communication module of the terminal device can acquire information bits to be sent to the network device through a channel, and the information bits are generated by a processing module of the terminal device, received from other devices or stored in a storage module of the terminal device.

In this application, a terminal device may be referred to as an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment. An access terminal may be a cellular telephone, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, and a user device in a 5G mobile communication system.

The network device may be a Base Transceiver Station (BTS) in a Code Division Multiple Access (CDMA) system, a base station (node B, NB) in a Wideband Code Division Multiple Access (WCDMA) system, an evolved node B (eNB) in a Long Term Evolution (LTE) system, or a base station (gNB) in a 5G communication system, where the base station is merely an example, and the network device may also be a relay station, an access point, a vehicle-mounted device, a wearable device, and other types of devices.

The above-described communication system to which the present application is applied is merely an example, and the communication system to which the present application is applied is not limited thereto, and for example, the number of network devices and terminal devices included in the communication system may also be other numbers.

Hereinafter, the method of transmitting and receiving uplink data provided by the present application will be described in detail.

Fig. 2 is a schematic diagram of a method for transmitting uplink data provided in the present application. The method 200 comprises:

s201, the terminal device determines N according to reference information, wherein N is the transmission times of a Transmission Block (TB) used by the terminal device, the reference information and N have a preset corresponding relation, and N is an integer greater than or equal to 1.

S202, the terminal equipment sends N uplink data according to an authorization-free transmission mode, wherein the N uplink data comprise one initial transmission data and N-1 retransmission data of the transmission block.

The retransmission data may be a repetition of the initially transmitted data, or may be different or the same Redundancy Version (RV) of the initially transmitted data. For example, the initial transmission data is RV0 of the transport block, and N-1 retransmission data are repetitions of the initial transmission data, i.e., are all RV 0; for another example, the initial transmission data is RV0 of the transport block, and the N-1 retransmission data are other RVs of the transport block, such as RV1, RV2, …; for another example, the initial transmission data is RV0 of a transport block, and the N-1 retransmission data is a repetition of the transport block or other RVs, such as RV0, RV1, RV2, RV2, ….

In the present application, the preset corresponding relationship between the reference information and N may be configured by the network device, may also be specified by the communication protocol, and may also be configured manually, where the corresponding relationship may be updated periodically or aperiodically, and the present application does not limit how the terminal device obtains the preset corresponding relationship.

The reference information may be one or more parameters or one or more conditions, and the specific form and name of the reference information are not limited in the present application.

It should be noted that the correspondence between the reference information and N may be one-to-one, or one-to-many, or many-to-one, for example, the reference information a may correspond to N1, or may correspond to N1 and N2, and the N1 may correspond to the reference information a, or may correspond to the reference information B, where the reference information a and the reference information B are different reference information, and N1 and N2 are values of different values in the value set described in S201. When the reference information a corresponds to N1 and N2, the terminal device may select one transmission number N as a transport block, and the present application does not limit how to determine N from N1 and N2.

In S201, as an optional example, the terminal device determines N from a value set according to the reference information, where the value set is information preset in the terminal device, the value set may be preconfigured by the network device, may be specified by a communication protocol, or may be manually configured, and the value set may be updated periodically or aperiodically.

When the terminal device has a transmission block to transmit, the terminal device may select a value from the value set according to the reference information, where the value represents the number of times of transmission of the unlicensed transmission, and the number of times of transmission may be different under different reference information, for example, when the reference information indicates that the current communication environment is better or the reliability requirement of the current transmission is not high, the terminal device may reduce the number of times of transmission of the unlicensed transmission, and when the reference information indicates that the current communication environment is worse or the reliability requirement of the current transmission is higher, the terminal device may increase the number of times of transmission of the unlicensed transmission, so that resources occupied by the unlicensed transmission may be reduced without affecting the success rate of reception.

Optionally, N is less than or equal to K, where K is the maximum number of transmissions for the unlicensed transmission.

The network device or the communication protocol may specify a maximum transmission number of times for the terminal device to perform the unlicensed transmission, so as to prevent the terminal device from occupying too many resources to cause resource waste and causing interference to other terminal devices of the current communication system to reduce the transmission reliability of the terminal devices.

For example, in some communication scenarios, for example, in an mtc scenario, there is usually no urgent data, K may be set as the maximum number of times of unlicensed transmission, and K is a parameter that is enforced, and the number of times of transmission of all current terminal devices when sending uplink data in an unlicensed transmission manner does not exceed K, so that fairness of transmission among the terminal devices may be ensured.

The transmission frequency may be a small value when the channel quality is good, and a large value when the channel quality is poor; when the service type of the transmission block has a low requirement on transmission reliability, the transmission frequency can be a small value, and when the service type of the transmission block has a high requirement on transmission reliability, the transmission frequency can be a large value; the channel quality and the service type of the transmission block can be comprehensively considered, and a proper numerical value is selected from the numerical value set, so that the transmission reliability can be ensured, and the resource utilization efficiency can be improved.

The channel quality can be characterized by measuring the signal-to-noise ratio (SNR) of the channel by the terminal equipment, and the larger the SNR is, the better the channel quality is, and the smaller the SNR is, the worse the channel quality is.

Fig. 3 is a diagram illustrating a corresponding relationship between an SNR and a transmission number of an unlicensed transmission provided in the present application. In fig. 3, the abscissa represents the value of the SNR of the channel measured by the terminal device, and the ordinate represents the value of N, the terminal device determines the number of transmissions to be 4 when the value of the SNR falls within the interval (a, b), and determines the number of transmissions to be 2 when the value of the SNR falls within the interval (c, d).

Fig. 3 is merely an illustration, and the present application does not limit the specific form of the correspondence between the SNR and the number of transmissions, and the correspondence between the SNR and the number of transmissions may also be represented by a table.

The network device can count the SNR, the transmission times and the transmission reliability of multiple times of unlicensed transmission, determine the corresponding relation among the SNR, the transmission times and the transmission reliability according to the counting result, and configure the corresponding relation to the terminal device, so that the terminal device can select the transmission times according to the requirement of the transmission block on the transmission reliability and the currently measured SNR. Of course, the correspondence may also be configured in the terminal device in a manual configuration manner, and how the terminal device obtains the reference information is not limited in the present application.

Fig. 4 is a schematic diagram of another method for determining N according to channel quality provided by the present application. In fig. 4, the UE1 and the UE2 are two different terminal devices communicating with the same base station, and the UE1 is closer to the base station, and the UE2 is farther from the base station, then the UE1 may determine that the current channel quality is better and select a smaller number of transmissions, and the UE2 may determine that the current channel quality is worse and select a larger number of transmissions.

The resources used by the UE1 and the UE2 for unlicensed transmission may be discontinuous (as shown in fig. 4) or continuous.

The base station may configure a maximum transmission frequency K for the UE1 and the UE2, where the maximum transmission frequency may be at a cell level, that is, the transmission frequency must not exceed K when all UEs perform the authorization-free transmission in a cell corresponding to the base station; the maximum transmission times can also be in a small group level, that is, the transmission times are not more than K when a group of UEs sharing the same authorization-free transmission resource carry out authorization-free transmission; the maximum number of transmissions may also be user-level, i.e. the base station configures different maximum numbers of transmissions for different UEs. It should be noted that K does not limit the actual number of times of the unlicensed transmission performed by the UE, and the UE may select a value not exceeding K from a preset value set as the actual number of times of the unlicensed transmission.

The foregoing describes a method for determining, by a terminal device, a transmission number of unlicensed transmission according to channel quality, and the terminal device may also determine the transmission number of unlicensed transmission according to a service type of a transmission block to be transmitted.

For example, the preset value set is {1,2,3, 4}, the maximum transmission frequency configured by the network device is 3, and when the service type corresponding to the transmission block is an ultra-reliable and low latency communication (URLLC) service, the terminal device may determine, according to the value set and the maximum transmission frequency configured by the network device, that the actual transmission frequency of the unauthorized transmission is 3, that is, the maximum value is selected from the value set on the premise of satisfying the maximum transmission frequency configured by the network device, so as to ensure the transmission reliability; when the service type corresponding to the transmission block is the mtc service, the terminal device may determine that the actual transmission frequency of the unlicensed transmission is 2 according to the value set and the maximum transmission frequency configured by the network device.

The above describes the embodiment in which the terminal device determines the number of times of the unlicensed transmission according to a single factor, and the terminal device may also determine the number of times of the unlicensed transmission according to multiple factors, that is, the network device may determine the number of times of the unlicensed transmission according to the channel quality and the service type corresponding to the transport block.

For example, the preset value set is {1,2,3, 4}, the maximum transmission number configured by the network device is 4, when the service type corresponding to the transport block is mtc service, if the current SNR value falls within the interval (a, b) shown in fig. 3, the terminal device may select 3 from the value set as the transmission number of the unlicensed transmission, and if the current SNR value falls within the interval (c, d) shown in fig. 3, the terminal device may select 2 from the value set as the transmission number of the unlicensed transmission; when the service type corresponding to the transport block is URLLC service, if the current SNR value falls within the interval (a, b) shown in fig. 3, the terminal device may select 4 from the above-mentioned set of values as the number of times of transmission of the unlicensed transmission, and if the current SNR value falls within the interval (c, d) shown in fig. 3, the terminal device may select 3 from the above-mentioned set of values as the number of times of transmission of the unlicensed transmission.

It should be noted that, the correspondence between the channel quality and/or the service type of the transport block and N described in the foregoing embodiment may be a direct correspondence or an indirect correspondence, where the direct correspondence refers to that N is not determined by information other than the channel quality and/or the service type of the transport block, and the indirect correspondence refers to that first intermediate information is determined according to the channel quality and/or the service type of the transport block, and then N is determined according to the intermediate information, where the intermediate information may be one or multiple, and this application does not limit this.

It should be understood that in the present application, "when …" means that the terminal device or the network device performs the corresponding processing under certain objective conditions, and is not limited to time, and does not require the terminal device or the network device to have a certain judgment action when implementing the corresponding function, and does not mean that there are other limitations.

Optionally, the reference information includes MCS.

Different MCSs may correspond to different transmission times, and the MCSs are equivalent to the channel quality to some extent. The MCS here refers to the MCS that is most suitable in the current channel situation. The better the channel quality, the higher the corresponding MCS; the worse the channel quality, the lower the corresponding MCS. A higher MCS means a higher transmission rate. When the channel quality is characterized by SNR, MCS tends to have a correspondence with SNR. Thus, determining a target unlicensed transmission resource based on channel quality may also be described as determining a target unlicensed transmission resource based on the MCS.

Fig. 5 is a schematic diagram illustrating a corresponding relationship between an MCS and a transmission number of an unlicensed transmission provided in the present application. In fig. 5, the abscissa represents the index of the MCS, and the ordinate represents the value of N, when the terminal device performs modulation coding using the MCS with index a, the terminal device may determine that the number of times of transmission of the unlicensed transmission is 4, and when the terminal device performs modulation coding using the MCS with index d, the terminal device may determine that the number of times of transmission of the unlicensed transmission is 1.

Fig. 5 is an illustration only, and the present application does not limit the specific form of the correspondence between the MCS and the transmission times, and the correspondence between the MCS and the transmission times may also be represented by a table.

The corresponding relationship between the MCSs and the transmission times may be one-to-one, one-to-many, or many-to-one, that is, one MCS may correspond to one value in a preset value set, one MCS may correspond to a plurality of values in the preset value set, and a plurality of MCSs may correspond to one value in the preset value set, and when one MCS corresponds to a plurality of values in the preset value set, the terminal device may select one value from the plurality of values according to other parameters or conditions, which is not limited in the present application.

The network device can count the MCS of multiple times of unlicensed transmission, the transmission times and the transmission reliability, determine the corresponding relation among the MCS, the transmission times and the transmission reliability according to the counting result, and configure the corresponding relation to the terminal device, so that the terminal device can select the transmission times according to the requirement of the transmission block on the transmission reliability and the currently used MCS. Of course, the correspondence may also be configured in the terminal device in a manual configuration manner, and how the terminal device obtains the reference information is not limited in the present application.

Optionally, before the terminal device determines N from the value set according to the MCS, the method 200 further includes:

s203, the terminal device determines a target authorization-free transmission resource from the at least two authorization-free transmission resources according to the channel quality and/or the service type of the transmission block, wherein the target authorization-free transmission resource is used for transmitting the transmission block.

S204, the terminal equipment determines the MCS according to the target authorization-free transmission resource, and the target authorization-free transmission resource and the MCS have a preset corresponding relation.

The MCS and the transmission times can be bound together with the unlicensed transmission resource, that is, when the terminal device selects to use the unlicensed transmission resource a to transmit the uplink data, the MCS used for transmitting the uplink data is determined to be the MCS bound by the unlicensed transmission resource a, and the transmission times of the unlicensed transmission is also determined. The terminal device may select one unlicensed transmission resource from a plurality of unlicensed transmission resources depending on the channel quality and/or the traffic type of the transport block.

For example, when the channel quality is good, the terminal device may select an unlicensed transmission resource with a higher transmission rate, and when the channel quality is poor, the terminal device may select an unlicensed transmission resource with a lower transmission rate.

For another example, when the service type corresponding to the transport block is a service type with a higher requirement on transmission reliability, the terminal device may select the unlicensed transmission resource with a lower transmission rate, and when the service type corresponding to the transport block is a service type with a lower requirement on transmission reliability, the terminal device may select the unlicensed transmission resource with a higher transmission rate.

For another example, when the channel quality is good and the service type corresponding to the transport block is a service type with a low requirement on the transmission reliability, the terminal device may select the unlicensed transmission resource a, and when the channel quality is poor and the service type corresponding to the transport block is a service type with a high requirement on the transmission reliability, the terminal device may select the unlicensed transmission resource B, where the transmission rate of the unlicensed transmission resource a is greater than the transmission rate of the unlicensed transmission resource B.

It should be noted that the MCS is equivalent to the channel quality to some extent. The MCS here refers to the MCS that is most suitable in the current channel situation. The better the channel quality, the higher the corresponding MCS; the worse the channel quality, the lower the corresponding MCS. A higher MCS means a higher transmission rate. When the channel quality is characterized by SNR, MCS tends to have a correspondence with SNR. Thus, determining a target unlicensed transmission resource based on channel quality may also be described as determining a target unlicensed transmission resource based on the MCS.

After determining the unlicensed transmission resource, the terminal device may determine the MCS to which the unlicensed transmission resource is bound, it should be noted that the correspondence between the MCS and N described in the above embodiment may be a direct correspondence or an indirect correspondence, where the direct correspondence refers to that N is not determined through information other than the MCS, the indirect correspondence refers to that intermediate information is first determined according to the MCS, and then N is determined according to the intermediate information, where the intermediate information may be one or multiple, and this is not limited in the present application. For example, one unlicensed transmission resource may also bind multiple MCSs, and the terminal device may select a suitable MCS according to other parameters or conditions, which is not limited in this application.

After the terminal device determines the MCS, the number of times of the unlicensed transmission may be determined, so that a suitable number of times of transmission may be flexibly selected according to an actual situation (e.g., channel quality and/or a service type of a transport block), and the resource utilization rate is improved while ensuring transmission reliability.

An example of determining N based on MCS and unlicensed transmission resources is given below.

The base station configures at least one triplet, i.e., (resource, MCS, N), for the UE, where the resource refers to a time-frequency resource allocation or a resource index of an unlicensed transmission resource. Each triplet represents one unlicensed transmission resource and MCS and N bound to the unlicensed transmission resource.

The base station may configure at least one unlicensed transmission resource and MCS and K corresponding to each unlicensed transmission resource for the UE based on the current channel condition of the UE. Then, the UE may select one of at least one unlicensed transmission resource configured by the base station according to the actual channel condition for transmission, and use the MCS and K corresponding to the unlicensed transmission resource during transmission. For example, the base station considers that the MCS of the currently most suitable UE is MCS3 according to the channel measurement, so three unlicensed transmission resources with bonding MCS of MCS2, MCS3 and MCS4 are configured for the UE, and each unlicensed transmission resource is bonded by different N as shown in fig. 6. Then, the UE may select a suitable unlicensed transmission resource from the three unlicensed transmission resources configured by the base station for transmission according to the actual channel condition at that time when transmitting data. For example, as the UE moves toward the cell center, the channel quality becomes better, resource 3 transmission may be selected, MCS4 and N-3; as the UE moves towards the cell edge, the channel quality becomes worse and resource 1 transmission may be selected using MCS2 and N-5. After a period of time, the resources configured by the base station may not be suitable for UE transmission, and at this time, the base station may reconfigure the unlicensed transmission resources, that is, reconfigure new unlicensed transmission resources and corresponding MCS and N for the UE. The above example corresponds to the base station configuring the UE with the set of

values

3,4, 5.

Each of the unlicensed transmission resources in the above-described embodiments may be contiguous or non-contiguous. The unlicensed transmission resource is discontinuous, which means that a plurality of transmission units included in the unlicensed transmission resource are discontinuous in the time domain and/or the frequency domain.

Since each unlicensed transmission resource can be configured to multiple UEs at the same time, and MCS and N are bound to the unlicensed transmission resource, no matter which UE uses the unlicensed transmission resource, only MCS and N bound to the unlicensed transmission resource can be used. In other words, the number of transmissions N of different UEs on the same unlicensed transmission resource is the same. This is beneficial for fairness of transmissions between UEs. The reason why the present embodiment has this advantageous effect is: if different UEs transmit on the same unlicensed transmission resource at different times, for example, N of UE1 is 1 and N of UE2 is 2, it is obvious that the transmission of UE1 has a greater probability of colliding with the transmission of UE2, resulting in lower transmission reliability of UE1 than UE 2. And the transmission times of different UEs on the same authorization-free transmission resource are the same, so that the probability of transmission collision among the UEs is the same, the transmission reliability is also the same, and the transmission fairness of different UEs is ensured.

Different unlicensed transmission resources may correspond to different transmission times, for example, under the same condition, the reliability of the dedicated frequency band is higher than that of the common frequency band, so the transmission times corresponding to the dedicated frequency band (for example, the frequency band of each operator) may be a smaller value to reduce the resource usage amount, and the transmission times corresponding to the common frequency band (for example, the unlicensed frequency band in licensed-assisted access (LAA) technology) may be a larger value to ensure the transmission reliability. For another example, when the frequency bands of different unlicensed transmission resources are the same, because different unlicensed transmission resources may be used to transmit different services and different services have different requirements on transmission reliability, the number of transmissions bound to different unlicensed transmission resources may be different, and for one of the unlicensed transmission resources, the number of transmissions bound to one unlicensed transmission resource may be the same for all terminal devices using the unlicensed transmission resource, thereby ensuring fairness among the terminal devices.

Different unlicensed transmission resources may also correspond to the same transmission times, where resource parameters (e.g., subcarrier spacing) of the different unlicensed transmission resources may be different to adapt to services with different delay requirements.

When the terminal device determines the target unlicensed transmission resource, the transmission times N corresponding to the target unlicensed transmission resource are the transmission times when the terminal device transmits on the target unlicensed transmission resource.

Optionally, before the terminal device determines N according to the unlicensed transmission resource used by the transmission transport block, the method 200 further includes:

s205, the terminal device determines, according to the channel quality and/or the service type of the transport block, an unlicensed transport resource (i.e., a target unlicensed transport resource) used by the transport block from among at least two unlicensed transport resources, where the target unlicensed transport resource has a preset corresponding relationship with the channel quality and/or the target unlicensed transport resource has a preset corresponding relationship with the service type of the transport block.

For example, when the channel quality is good, the terminal device may select the unlicensed transmission resource with lower reliability, and when the channel quality is poor, the terminal device may select the unlicensed transmission resource with higher reliability; for another example, when the service type corresponding to the transmission block belongs to a high-priority service type, the terminal device may select the unlicensed transmission resource with higher reliability, and when the service type corresponding to the transmission block belongs to a low-priority service type, the terminal device may select the unlicensed transmission resource with lower reliability. The terminal equipment can also select the authorization-free transmission resource based on the channel quality and the service type of the transmission block, thereby improving the resource utilization rate while ensuring the transmission reliability.

Optionally, before the terminal device determines N according to the reference information, the method 200 further includes:

s206, the terminal equipment receives configuration information, and the configuration information is used for configuring the corresponding relation between the reference information and the N.

The corresponding relation between the reference information and the N can be configured in the terminal equipment in advance through the configuration information, the corresponding relation can be a result obtained by counting the relation between the communication reliability and the transmission times under different conditions through the network equipment, and the configuration content can be updated regularly, so that the terminal equipment can select the proper authorization-free transmission times, the transmission reliability is ensured, and the resource utilization rate is improved.

The network device may transmit the configuration information to the terminal device through Radio Resource Control (RRC) signaling, Medium Access Control (MAC) Control Element (CE), or physical layer signaling (e.g., Downlink Control Information (DCI)).

The specific form of the configuration information, the name of the configuration information and the sending and receiving modes of the configuration information are not limited.

After the UE transmits N times of transport blocks on the unlicensed transmission resource, the base station needs to perform a hybrid automatic repeat request response on the N times of transmission, that is, send an acknowledgement/negative acknowledgement (ACK/NACK) message to the UE to indicate whether the base station correctly receives data sent by the UE. The base station may use a physical hybrid automatic repeat request indicator channel (PHICH), a PHICH-like (PHICH-like), downlink indication information (DCI), group common DCI (group common DCI), and other channels or information to carry ACK/NACK.

And the base station adopts the PHICH to carry the ACK/NACK to realize the response to the received authorization-free transmission data.

1. The base station responds individually to each of the N transmissions.

The base station responds by treating each of the received N data of the same transport block as an independent data. This method is applicable to the case where Redundancy Versions (RVs) of N data are the same, because other RVs except RV0 in various RV versions have no independence and may not be able to be decoded separately.

The base station may have two response methods. One method is that the base station decides to respond to an ACK or NACK independently according to the reception situation of each of N transmissions. Another method is that as long as data transmitted at least once in N transmissions is correctly decoded by the base station, the base station responds to ACK for all transmissions in the N transmissions; when all of the N transmissions are not decoded correctly, the base station responds with a NACK for all of the N transmissions.

Both ACK and NACK need to be carried by PHICH. The base station responds separately for each of the N transmissions, which requires that different ones of the N transmissions be mapped onto different PHICHs. According to the PHICH determination method in the current standard, a PHICH corresponding to uplink data is related to an index of a demodulation reference signal (DMRS) and a resource allocation index for uplink transmission. Based on this rule, in order to map different transmissions of N transmissions onto different PHICHs, there may be the following method:

option 1: the PHICH corresponding to each transmission is associated with the transmission unit selected for that transmission.

As shown in fig. 7, the UE selects the

transmission unit

3, 8, 9, 14 to transmit data of 4 transmissions of the same transport block in the unlicensed transmission resource. The PHICH corresponding to each transmission is related to the index of the transmission element, e.g., the PHICH corresponding to the data transmitted by the UE on the transmission element 3 is determined by the index of the transmission element (i.e., transmission element 3). The index of the DMRS corresponding to different transmissions in N transmissions of the same transport block may be the same or different.

Option 2: the corresponding PHICH per transmission is related to the DMRS index.

Different DMRS are transmitted in different times in N times of transmission of the same transmission block according to standard predefinition or pre-configuration by a network side, and the DMRS index of the nth transmission is marked as DMRS (N). In this way, the PHICH corresponding to the data transmitted by the nth transmission of the UE can be determined by the dmrs (n). The uplink resource allocation indexes corresponding to N transmissions may be the same, for example, the indexes of the transmission units in the lower left corner in the unlicensed transmission resource (e.g., the transmission unit 4 in fig. 7) are all adopted; the uplink resource allocation indexes corresponding to N transmissions may be different from each other, for example, the uplink resource allocations corresponding to 4 transmissions in fig. 7 are

transmission units

3, 8, 9, and 14, respectively.

2. The base station responds once to all of the N transmissions.

Since the same transport block is actually transmitted in the N transmissions, the base station may send a response message only once after receiving the N transmissions, indicating whether the information transmitted by the N transmissions is correctly received. In other words, N transmissions need to be mapped onto the same PHICH.

For the case that N is not bound to the transmission resource and/or MCS, since the value of N is determined by the UE itself, the base station cannot determine N, and thus, when the base station receives one piece of data of the UE, it cannot determine that the transmission is data transmitted for the second time. Since the PHICH is determined by the DMRS index and the resource allocation index for uplink transmission, to implement mapping N transmissions on the same PHICH, the DMRS index corresponding to the N transmissions and the resource allocation index for uplink transmission need to be the same. Therefore, the same UE should bind fixed DMRSs, and if the base station configures DMRSs for each UE in advance, multiple UEs sharing the same grant-free transmission resource should configure different DMRSs, so as to avoid collision caused by mapping transmissions of different UEs to the same PHICH. The resource allocation index for N transmissions should also use the same value, e.g., the index of the transmission unit in the lower left corner of the unlicensed transmission resource (e.g., transmission unit 4 in fig. 7). Of course, the above method is also applicable to the case where N is bound to transmission resources and/or MCS.

In particular, for the case where N transmissions are different redundancy versions of the same data, since the redundancy versions other than RV0 do not have independent decoding capability, the index of the transmission element corresponding to the initial transmission (i.e., the transmission using RV0) can be used to calculate the corresponding PHICH. When the base station solves the data correctly, it means that the base station must have received the data using RV0 (i.e., must know the transmission unit index used for the initial transmission), and thus calculates the corresponding PHICH based on this; if the base station does not resolve the data correctly, the base station does not send the PHICH (i.e., does not respond).

The method for transmitting uplink information provided by the present application is described above in detail, and the method for receiving uplink information provided by the present application will be described below.

Fig. 8 illustrates a method for receiving uplink data provided by the present application. The method 800 includes:

s801, a network device sends configuration information, wherein the configuration information is used for configuring a corresponding relation between reference information and N, N is the number of times that a terminal device transmits a transmission block in an authorization-free transmission mode, N is an integer greater than or equal to 1, and the corresponding relation between the reference information and N is used for the terminal device to determine N corresponding to the reference information according to the reference information.

S802, the network device receives N uplink data from the terminal device, wherein the N uplink data comprise one initial transmission data and N-1 retransmission data of the transmission block.

The network device may configure a value set for the terminal device, where a value in the value set is a possible value of N, and when the terminal device needs to transmit a transmission block, the terminal device may select a value from the value set according to the reference information, where the value represents a number of times of transmission, and the number of times of transmission may be different under different reference information, for example, when the reference information indicates that a current communication environment is good or a reliability requirement of current transmission is not high, the terminal device may reduce the number of times of transmission of the unlicensed transmission, and when the reference information indicates that the current communication environment is poor or the reliability requirement of current transmission is high, the terminal device may increase the number of times of transmission of the unlicensed transmission, thereby reducing resources occupied by the unlicensed transmission without affecting a reception success rate.

As will be clear to those skilled in the art: the network device in the method 800 is identical to the network device in the method 200, and a processing manner of the network device in the method 800 for implementing the function of receiving the N uplink data corresponds to a processing manner of the network device in the method 200 for implementing the function of sending the N uplink data, and is not described again for brevity.

The network device may ensure fairness of transmission between terminal devices using the unlicensed transmission resource by configuring a maximum number of transmissions corresponding to the unlicensed transmission resource, for example, in an mtc scenario, there is usually no urgent data, and the network device may set K as a mandatory parameter, that is, the terminal device must comply with the constraint of K, so as to ensure fairness of transmission between terminal devices.

The network equipment can also count the relation between the communication reliability and the transmission times in a scene of carrying out the authorization-free transmission by using different authorization-free transmission resources, determine the transmission times corresponding to the authorization-free transmission resources on the premise of meeting the communication reliability requirement according to the statistical result, and inform the corresponding relation between the authorization-free transmission resources and the transmission times to the terminal equipment through the configuration information, so that the terminal equipment can select proper authorization-free transmission resources according to the authorization-free transmission resources, thereby improving the resource utilization rate while ensuring the transmission reliability.

The network equipment can also count the relation between the communication reliability and the transmission times in the scene of using different MCS for the authorization-free transmission, determine the transmission times corresponding to the MCS on the premise of meeting the requirement of the communication reliability according to the statistical result, and inform the corresponding relation between the MCS and the transmission times to the terminal equipment through the configuration information, so that the terminal equipment can select proper authorization-free transmission resources according to the MCS, thereby improving the resource utilization rate while ensuring the transmission reliability.

Optionally, the correspondence between the target unlicensed transmission resource and N includes: the corresponding relation between the target unlicensed transmission resource and the MCS and the corresponding relation between the MCS and the N.

Examples of the methods for transmitting and receiving uplink data provided by the present application are described above in detail. It is understood that the terminal device and the network device include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The present application may perform the division of the functional units for the terminal device and the network device according to the above method examples, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that the division of the units in the present application is schematic, and is only one division of logic functions, and there may be another division manner in actual implementation.

Fig. 9 shows a schematic diagram of a possible structure of the terminal device according to the above-described embodiment, in the case of an integrated unit. The terminal apparatus 900 includes: a processing unit 902 and a communication unit 903. Processing unit 902 is configured to control and manage actions of terminal device 900, e.g., processing unit 902 is configured to enable terminal device 900 to perform the various steps of fig. 2 and/or other processes for the techniques described herein. The communication unit 903 is configured to support communication between the terminal device 900 and another communication device, for example, send uplink data generated by the processing unit 902 to a network device. The terminal device 900 may further include a storage unit 901 for storing program codes and data of the terminal device 900.

For example, the processing unit 902 determines N according to reference information, where N is the transmission frequency of the transmission block, where the reference information has a preset corresponding relationship with N, and N is an integer greater than or equal to 1; the communication unit 903 sends N uplink data in an unlicensed transmission mode, where the N uplink data includes one initial transmission data and N-1 retransmission data of the transmission block.

The processing unit 902 may be a processor or a controller, such as a Central Processing Unit (CPU), a general purpose processor, a Digital Signal Processor (DSP), an application-specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication unit 903 may be a transceiver, a transceiving circuit, or the like. The storage unit 901 may be a memory.

When the processing unit 902 is a processor, the communication unit 903 is a transceiver, and the storage unit 901 is a memory, the terminal device related to the present application may be the terminal device shown in fig. 10.

Referring to fig. 10, the terminal device 1000 includes: processor 1002, transceiver 1003, memory 1001. The transceiver 1003, the processor 1002, and the memory 1001 may communicate with each other via an internal connection path to transmit control and/or data signals.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the apparatuses and units described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

The terminal device 900 and the terminal device 1000 provided by the present application may select a value from a preset value set according to the reference information, where the value represents the transmission times of the unlicensed transmission, and the transmission times may be different under different reference information, for example, when the reference information indicates that the current communication environment is better or the reliability requirement of the current transmission is not high, the terminal device 900 and the terminal device 1000 may reduce the transmission times of the unlicensed transmission, and when the reference information indicates that the current communication environment is worse or the reliability requirement of the current transmission is higher, the terminal device 900 and the terminal device 1000 may increase the transmission times of the unlicensed transmission, so that resources occupied by the unlicensed transmission may be reduced on the premise of not affecting the reception success rate.

Fig. 11 shows a schematic diagram of a possible structure of the network device involved in the above embodiments, in the case of an integrated unit. The network device 1100 includes: a processing unit 1102 and a communication unit 1103. Processing unit 1102 is configured to control and manage actions of network device 1100, e.g., processing unit 1102 is configured to enable network device 1100 to perform the various steps of fig. 8 and/or other processes for the techniques described herein. The communication unit 1103 is configured to support communication between the network device 1100 and other communication devices, for example, receive uplink data sent by a terminal device. The network device 1100 may also include a storage unit 1101 for storing program codes and data of the network device 1100.

For example, the communication unit 1103 performs: sending configuration information, wherein the configuration information is used for configuring a corresponding relation between reference information and N, N is the number of times that a terminal device transmits a transmission block in an authorization-free transmission mode, and N is an integer greater than or equal to 1, and the corresponding relation between the reference information and N is used for the terminal device to determine N corresponding to the reference information according to the reference information; and receiving N uplink data from the terminal equipment, wherein the N uplink data comprise initial transmission data and N-1 retransmission data of the transmission block.

The processing unit 1102 may be a processor or controller, which may be, for example, a CPU, general purpose processor, DSP, ASIC, FPGA or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication unit 1103 may be a transceiver, a transceiving circuit, or the like. The storage unit 1101 may be a memory.

When the processing unit 1102 is a processor, the communication unit 1103 is a transceiver, and the storage unit 1101 is a memory, the network device according to the present application may be the network device shown in fig. 12.

Referring to fig. 12, the network device 1200 includes: a processor 1202, a transceiver 1203, a memory 1201. The transceiver 1203, the processor 1202, and the memory 1201 may communicate with each other via internal communication paths to transfer control and/or data signals.

The network device 1100 and the network device 1200 provided by the present application may configure a value set for the terminal device, the value in the value set is a possible value of the transmission times of the authorization-free transmission, when the terminal equipment has a transmission block to transmit, the terminal equipment can select a value from the value set according to the reference information, this value represents the number of transmissions, which may be different for different reference information, e.g., when the reference information indicates that the current communication environment is better or the reliability requirement of the current transmission is not high, the terminal device can reduce the transmission times of the authorization-free transmission, when the reference information indicates that the current communication environment is poor or the reliability requirement of the current transmission is high, the terminal device may increase the number of transmissions of the unlicensed transmission, therefore, resources occupied by the authorization-free transmission can be reduced on the premise of not influencing the receiving success rate.

It should be understood that the above-described transceiver may include a transmitter and a receiver. The transceiver may further include an antenna, and the number of antennas may be one or more. The memory may be a separate device or may be integrated into the processor. The above-mentioned devices or parts of the devices may be implemented by being integrated into a chip, such as a baseband chip.

For the convenience of the reader to understand the present application, some embodiments of the method and apparatus for transmitting or receiving uplink data provided in the present application are listed below. K in the following examples corresponds to N in the above examples. The following embodiments and relevant portions of the above embodiments may be understood by referring to each other.

In one embodiment, the base station may configure a set of recommended values of the number of unlicensed transmissions Ω ═ K1, K2, … for the UE, and the UE determines the number of transmissions K of the current unlicensed transmission in Ω, K ∈ Ω according to the circumstances.

The UE determines the current number of times K of unlicensed transmission in Ω according to the situation, which may be determined according to the channel situation. For example, when the channel quality is good, a smaller K is selected, and when the channel quality is poor, a larger K is selected. The UE may measure the channel based on the synchronization signals (PSS/SSS) and/or reference signals (e.g., CRS) of the base station. The UE may also determine K in Ω based on historical transmission conditions. For example, after the UE selects the transmission number K, when the transmission success probability > ω 1 in the last predefined period of time, then K is decreased by 1; if the transmission success probability < ω 2 in the last predefined period of time, then K is increased by 1. Wherein omega 1 is more than or equal to omega 2. The transmission success probability may also be defined based on the transmission of the most recent N data, N being a predefined value.

The unlicensed transmission resources or unlicensed resources referred to herein have the same meaning and may include, but are not limited to, a combination of one or more of the following:

A) time domain resources (which may also be referred to as time resources), such as radio frames, subframes, symbols, etc.;

B) frequency domain resources (which may also be referred to as spectrum resources), such as subcarriers, resource blocks, etc.;

C) spatial domain resources such as transmit antennas, beams, etc.;

D) code domain resources such as Sparse Code Multiple Access (SCMA) codebooks, Low Density Signature (LDS) sequences, CDMA codes, etc.;

E) and (4) uplink pilot frequency resources.

Each unlicensed transmission resource or unlicensed resource may include one or more unlicensed transmission units, which may be referred to as transmission units for short. When the UE performs the unlicensed transmission, one or more transmission units may be selected from the unlicensed transmission resources configured by the base station for transmission. For K transmissions, the UE needs to select at least K transmission units for transmission. Of course, each of the K transmissions may occupy more than one transmission unit, in which case the UE needs to select K groups of transmission units for transmission, where each group of transmission units corresponds to one of the K transmissions.

Fig. 13 illustrates a scenario applicable to the present application, as shown in fig. 13, a base station (a network device) may perform data transmission with a UE (user equipment, also referred to as terminal device herein), and the base station allocates transmission resources for the UE. From the aspect of product morphology, a base station is a device with a central control function, such as a macro base station, a micro base station, a hotspot (pico), a home base station (femeto), a Transfer Point (TP), a relay (relay), an Access Point (AP), and the like, which may be collectively referred to as a network device; the UE is a device capable of receiving scheduling and indication information of a base station, and may be a terminal device, such as a mobile phone, a computer, a bracelet, a smart watch, a data card, a sensor, a Station (STA), and the like, which may be collectively referred to as a terminal device. For sidelink (sidelink), such as a link between a bracelet and a handset in a bracelet-handset-base station, the bracelet may be considered a UE and the handset a base station.

The network element includes a base station (e.g., a gbb, generation Node B, i.e., a base station referred to in the 5G NR standard) and a UE.

The base station to which the present application relates may be the base station 1400 shown in fig. 14.

Referring to fig. 14, a base station 1400 includes: a processor 1401, a memory 1402, a transceiver 1403, and a bus 1404. Wherein the processor 1401, the memory 1402 and the transceiver 1403 are connected to each other by a bus 1404. The bus 1404 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 1404 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 14, but this is not intended to represent only one bus or type of bus.

The detailed description of each module or unit and the technical effects brought by each module or unit after performing the related method steps performed by the base station in any method embodiment of the present application can refer to the related description in the method embodiment of the present application, and are not repeated herein.

The present application also provides a non-volatile storage medium (one type of computer-readable storage medium) having one or more program codes stored therein, which when executed by the processor 1401 of the base station 1400, the base station 1400 performs the relevant method steps performed by the base station in any of the method embodiments of the present application.

The UE 1500 referred to in the present application may be the UE 1500 shown in fig. 15.

Referring to fig. 15, a UE 1500 includes: a processor 1501, memory 1502, a transceiver 1503, and a bus 1504. Wherein the processor 1501, the memory 1502, and the transceiver 1503 are interconnected by a bus 1504. The bus 1504 may be a PCI bus, an EISA bus, or the like. The bus 1504 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 15, but this is not intended to represent only one bus or type of bus.

The detailed description of each module in the UE 1500 and the technical effects brought by each module after each module executes the related method steps executed by the UE in any method embodiment of the present application may refer to the related description in the method embodiment of the present application, and are not repeated herein.

The present application also provides a non-volatile storage medium having one or more program codes stored therein, which when executed by the processor 1501 of the UE 1500, the UE 1500 performs the relevant method steps performed by the UE in any of the method embodiments of the present application.

The first embodiment of the application: maximum value of transmission times configured by base station

The base station may configure a maximum number of transmissions K for the UE for the unlicensed transmission. This is equivalent to configuring a set of possible transmission times set with Ω {1,2,3, …, K } for the UE by the base station, and determining the transmission times K0, K0 ∈ Ω in Ω according to the actual situation when the UE transmits.

If the UE determines K0 in Ω based on the channel quality, it may be equivalent to the UE determining K0 based on the SNR of the channel. The larger the SNR, the better the channel quality, the smaller K0; the smaller the SNR, the worse the channel quality, and the larger K0. Fig. 16 is a specific example of the SNR-based determination K0, but fig. 16 may be embodied in a table form. The UE first measures the channel, obtains the SNR, and then obtains the corresponding K0 value based on fig. 16.

Fig. 17 is a specific example, and it is assumed that the maximum transmission number configured by the base station is K-4. UE1 is closer to the base station, the channel quality is better, and the number of transmissions determined by UE1 based on fig. 17 is K0 — 2; the UE2 is far from the base station, the channel quality is poor, and the number of transmissions determined by the UE2 based on fig. 17 is K0 — 4. It should be noted that the unlicensed transmission resource in fig. 5 may be continuous or discontinuous.

In this embodiment, the base station configures the maximum transmission frequency K for the UE, which may be cell-specific, that is, K0 is selected based on the same Ω when all UEs in the cell perform the unlicensed transmission; k may also be based on a group of UEs, e.g., the base station configures the same K for a group of UEs sharing the same unlicensed resource; k may also be per user, i.e. the base station may configure different ks for different UEs. However, in any case, the base station does not indicate the number of transmissions K0 actually used in the UE transmission, but only indicates the maximum allowable value of K0. The value of K0 is determined by the UE within the range of 1-K.

The second embodiment of the application: the unlicensed resource or MCS is associated with K

The present embodiment proposes that the unlicensed resources may be associated with K, i.e. one (MCS, K) or K per unlicensed resource. When the UE selects a certain unlicensed resource for transmission, either (MCS, K) or K bound to that resource must be employed.

There are various ways to implement the binding of the unlicensed resource to K.

In one implementation, the base station configures at least one (resource, MCS, K) or (resource, K) tuple for the UE, where the resource refers to a time-frequency resource allocation or a resource index of an unlicensed resource. Each tuple represents an unlicensed resource and a (MCS, K) or K bound to the resource. In other words, each unlicensed resource is bound by one K, i.e., the number of transmissions when any UE selects the unlicensed resource for transmission is the same and equal to the K bound to the unlicensed resource.

Another way to implement this is that the standard predefines or the network preconfigures the mapping relationship between MCS and K, as shown in fig. 18, of course, fig. 18 can also be embodied in the form of a table. On this basis, the base station configures at least one (resource, MCS) for the UE, and the UE can determine the corresponding K from the MCS according to the mapping relationship shown in fig. 18.

In a specific embodiment, the base station may configure at least one unlicensed resource and MCS and K corresponding to each unlicensed resource for the UE based on the current channel condition of the UE. Then, the UE may select one of at least one unlicensed resource configured by the base station according to the actual channel condition for transmission, and use the MCS and K corresponding to the unlicensed resource during transmission. For example, the base station considers that the currently most suitable MCS of a UE is MCS3 according to the channel measurement, and therefore configures three unlicensed resources with bonding MCSs of MCS2, MCS3 and MCS4 for the UE, as shown in fig. 19, each unlicensed resource is bonded with a different K. Then, the UE can select an appropriate resource from the three resources configured by the base station for transmission according to the actual channel condition at that time when transmitting data. For example, as the UE moves toward the cell center, the channel quality becomes better, resource 3 transmission may be selected, using MCS4 and K-3; as the UE moves towards the cell edge, the channel quality becomes worse and resource 1 transmission may be selected using MCS2 and K-5. After a period of time, the resources configured by the base station may not be suitable for UE transmission, and at this time, the base station may reconfigure the unlicensed resources, that is, reconfigure new unlicensed resources and corresponding MCS and K for the UE. The above example corresponds to the base station configuring the UE with Ω ═ 3,4, 5. The resources in the embodiment described in fig. 19 may also be bound to K only and not to MCS.

Each unlicensed transmission resource in this embodiment may be continuous or discontinuous. The unlicensed transmission resource is discontinuous, which means that a plurality of transmission units included in the unlicensed transmission resource are discontinuous in the time domain and/or the frequency domain.

Since each unlicensed transmission resource can be configured to multiple UEs at the same time, and MCS and K are bound to the unlicensed transmission resource, no matter which UE uses the unlicensed transmission resource, only MCS and/or K bound to the unlicensed transmission resource can be used. In other words, the number of transmissions K by different UEs on the same unlicensed transmission resource is the same. This is beneficial for fairness of transmissions between UEs. If different UEs transmit on the same unlicensed transmission resource at different times, for example, K of UE1 is 1 and K of UE2 is 2, it is obvious that the transmission of UE1 has a greater probability of colliding with the transmission of UE2, resulting in lower transmission reliability of UE1 than UE 2. And the transmission times of different UEs on the same authorization-free transmission resource are the same, so that the probability of transmission collision among the UEs is equivalent, the transmission reliability is equivalent, and the fairness of transmission of different UEs is ensured.

The third embodiment of the application: base station response HARQ-ACK

After the UE performs K transmissions of certain data on the unlicensed resource, the base station needs to perform HARQ-ACK response on the K transmissions, that is, send ACK/NACK, indicating whether the base station correctly receives the data of the UE. The base station may use PHICH, PHICH-like, DCI, group common DCI, etc. to carry response information of the unlicensed data.

In this embodiment, it is assumed that the base station uses a conventional PHICH channel to carry response information of the unlicensed data, and implements a response to K times of transmission of certain data. But may have different specific forms in specific responses. This embodiment can be used in combination with the second embodiment as well.

1) Base station individually responding to each of K transmissions

I.e. the base station responds by treating each of the K transmissions of the same data sent by the UE as an independent data. This method is applicable to the case where K transmissions are repeated versions of the same data (i.e., the same RV), because the redundancy versions other than RV0 in the case of transmission versions (different RVs) are not independent and may not be decoded separately.

The base station may have two specific response methods. One approach is for the base station to decide independently whether to respond to an ACK or NACK based on the reception of each of the K transmissions. Another method is that the base station responds to ACK for all of the K transmissions as long as at least one of the K transmissions is decoded correctly by the base station; when all of the K transmissions are not decoded correctly, the base station responds with a NACK for all of the K transmissions.

Both ACK and NACK need to be carried by PHICH. The base station responds separately for each of the K transmissions, which requires that different ones of the K transmissions should be mapped onto different PHICH resources. According to the PHICH resource determination method in the current standard, PHICH and n corresponding to one UL data_DMRSAnd resource allocation index of UL transmission. Based on this rule, in order to map different transmissions of the K transmissions to different PHICH resources, there may be the following method:

A) option 1-each transmission of the corresponding PHICH resource is related to transmitting the selected transmission unit.

As shown in fig. 20, a UE selects 4 transmissions of the same data from the unlicensed resources by the

transmission units

3, 8, 9, and 14. The PHICH resource corresponding to each transmission should be matched with the index of the transmission unitRegarding, for example, the PHICH resource of data transmitted by the UE on the transmission element 3 is determined by the index of the transmission element (i.e., transmission element 3). N for different ones of K transmissions of the same data_DMRSMay be the same or different.

B) Option 2, corresponding PHICH resource and n are transmitted each time_DMRSTo a

Assume that different ones of the K transmissions, in which the same data is pre-defined by a standard or pre-configured by the network side, correspond to different n_DMRSN of kth transmission_DMRSIs marked as n_DMRS(k) In that respect Thus, the UE transmits the corresponding PHICH resource at the k time_DMRS(k) And (6) determining. The UL resource allocation indexes corresponding to K transmissions may be the same, such as the indexes of the transmission units in the lower left corner of the unlicensed resource (e.g., transmission unit 4 in fig. 20); UL resource allocation indexes corresponding to K transmissions may be different from each other, and as shown in fig. 20, UL resource allocations corresponding to K-4 transmissions are

transmission units

3, 8, 9, and 14, respectively.

2) Base station one-time response to all of K transmissions

Since the same data is actually transmitted in the K transmissions, the base station can send a response only once after receiving the K transmissions, indicating whether the data to be transmitted in the K transmissions is correctly received. In other words, K transmissions need to be mapped to the same PHICH resource.

For the first embodiment, since the value of the actual number of transmissions K0 is determined by the UE itself and the base station does not know in advance, when the base station receives a transmission from the UE, it cannot be determined that the transmission is the number of times of the K0 transmissions sent by the UE. Since PHICH resource is composed of n_DMRSAnd resource allocation index determination of UL transmission, so in order to realize mapping of K transmissions onto the same PHICH resource, n corresponding to the K transmissions_DMRSAnd the resource allocation index for UL transmission need to be the same. Therefore, the same UE should bind fixed n_DMRSE.g. base station configuring n for each UE in advance_DMRS. Multiple UEs sharing the same unlicensed resource should be configured with n different from each other_DMRSTo avoid collision caused by mapping of transmissions of different UEs to the same PHICH resource. The resource allocation index for K transmissions should also use the same value, such as the index of the transmission unit in the lower left corner of the unlicensed resource (e.g., transmission unit 4 in fig. 20). Of course, the above method is also applicable to the second embodiment.

In particular, for the case where the K transmissions are different redundancy versions of the same data, since the redundancy versions other than RV0 do not have independent decoding capability, the corresponding PHICH can be calculated using the index of the transmission unit corresponding to the first transmission (i.e., RV0) of the K transmissions. When the base station correctly solves the data, it means that the base station must receive RV0 (i.e., must know the transmission unit index of RV0), and thus calculates the corresponding PHICH resource based thereon; if the base station does not resolve the data correctly, the base station does not send PHICH (i.e., does not respond).

The present application also provides the following embodiments, wherein the numbers of the following embodiments and the numbers of the foregoing embodiments have no specific relationship, and are only for convenience of description. The following embodiments and relevant portions of the above embodiments may be understood by referring to each other.

1. A method of data transmission, the method comprising:

the method comprises the steps that terminal equipment receives authorization-free configuration information sent by network equipment, wherein the authorization-free configuration information comprises authorization-free resources configured to the terminal equipment by the network equipment; the terminal device determines a retransmission number K0 based on a first factor, wherein the first factor at least comprises the channel quality between the terminal device and the network device; and the terminal equipment sends K0 retransmission data of the first data to the network equipment in the authorization-free resource.

The UE determines the number of times of the unlicensed retransmission based on factors such as channel quality and the like, so that the UE is more favorable for fully utilizing unlicensed resources, and the UE can determine the appropriate number of times of the retransmission based on the channel condition because the UE is clearer about the channel condition.

2. According to the method of embodiment 1, a preset mapping relationship exists between the channel quality and the number of retransmissions.

There is a mapping relationship between the channel quality and the retransmission times, so that after the UE measures the channel quality (e.g., SNR), the corresponding retransmission times can be determined based on the mapping relationship. All the UEs determine the retransmission times based on the same mapping relation, so that the fairness among the UEs when the retransmission times are determined is ensured.

3. The method according to

embodiment

1 or 2, after the terminal device sends K0 retransmission data of the first data to the network device in the license-exempt resource, the method includes:

the terminal device receives a response to the first data on a first PHICH resource consisting of the grant-exempt resource and n_DMRSDetermined of said n_DMRSIncluded in the authorization-exempt configuration information.

The K0 retransmissions of the first data sent by the UE are all based on the same unlicensed resource and the same n_DMRSThe corresponding PHICH resource is determined, which results in that K0 retransmissions are mapped to the same PHICH resource, i.e. only one response is needed for K0 retransmissions of the first data, reducing the response overhead.

4. The method of any of embodiments 1-3, wherein K0 ≦ K included in the authorization-exempt configuration information.

The base station configures the maximum retransmission times, and avoids the interference to other UEs due to too much occupation of resources caused by too large retransmission times of the UEs.

5. A method of data transmission, the method comprising:

a terminal device receives authorization-free configuration information sent by a network device, wherein the authorization-free configuration information comprises at least one authorization-free resource configured to the terminal device by the network device and an MCS corresponding to each authorization-free resource in the at least one authorization-free resource; the terminal equipment determines one authorization-free resource as a first authorization-free resource in the at least one authorization-free resource; and the terminal equipment sends K retransmission data of the first data to the network equipment by adopting a first MCS corresponding to the first unlicensed resource in the first unlicensed resource, wherein K is the retransmission times bound with the first unlicensed resource and/or the first MCS.

The UE determines the retransmission times bound with the configured authorization-free resources or MCS corresponding to the authorization-free resources based on the configured authorization-free resources, and the retransmission times of different UEs which use the same authorization-free resources for transmission are the same, so that the fairness of transmission among the UEs is ensured.

6. The method of embodiment 5, the binding of K to the first MCS is predefined.

The binding relationship between the MCS and the K is predefined, and the base station only needs to configure the MCS without configuring the K when configuring the relevant transmission parameters, so that the indication overhead of the configuration process is reduced. The UE may determine the corresponding K from the MCS based on the predefined mapping relationship.

7. The method of embodiment 5, wherein the binding relationship between the K and the first unlicensed resource and/or the first MCS is configured by the network device to the terminal device.

The base station configures the unlicensed resources and/or the binding relationship between the MCS and the K, and the method enables the mapping relationship to have greater flexibility.

8. The method according to any of embodiments 5-7, wherein the determining, by the terminal device, one unlicensed resource as a first unlicensed resource in the at least one unlicensed resource comprises:

the terminal equipment measures the channel quality between the terminal equipment and the network equipment; the terminal device determining a first MCS based on the measured channel quality; and the terminal equipment selects an authorization-exempt resource corresponding to the first MCS from the at least one authorization-exempt resource as the first authorization-exempt resource.

The UE determines the MCS most suitable for the current channel quality based on the channel quality, and then determines the corresponding unlicensed resource based on the MCS as the resource used for current transmission, which is a general method for the UE to determine the unlicensed resource based on the channel quality.

9. The method according to any of embodiments 5-8, after the terminal device sends K retransmission data of first data to the network device in the first grant-free resource with a first MCS corresponding to the current transmission resource, comprising:

the terminal equipment receives the first PHICH resource on the first PHICH resourceA response to data, the first PHICH resource being composed of the first grant-exempt resource and n_DMRSDetermined of said n_DMRSIncluded in the authorization-exempt configuration information.

The K retransmissions of the first data sent by the UE are all based on the same unlicensed resource and the same n_DMRSAnd determining the corresponding PHICH resource, which causes that the K retransmissions can be mapped to the same PHICH resource, namely, the K retransmissions of the first data only need one response, thereby reducing the response overhead.

10. A method of data transmission, the method comprising:

the method comprises the steps that network equipment sends authorization-free configuration information to terminal equipment, wherein the authorization-free configuration information comprises authorization-free resources configured to the terminal equipment by the network equipment; the network device receives K0 retransmission data of the first data sent by the terminal device in the unlicensed resource, wherein K0 is determined by the terminal device based on a first factor, and the first factor at least comprises channel quality between the terminal device and the network device.

11. According to the method of embodiment 10, a preset mapping relationship exists between the channel quality and the number of retransmissions.

12. The method according to

embodiment

10 or 11, after the network device receives K0 retransmission data of the first data sent by the terminal device in the license-exempt resource, the method includes:

the network device sends a response of the first data to the terminal device on a first PHICH resource, the first PHICH resourceThe PHICH resource is composed of the grant-free resource and n_DMRS(i.e., the index of the DMRS, which may be configured by the base station), the nDMRS being included in the grant-less configuration information.

13. The method as in any of embodiments 10-12, the K0 ≦ K included in the authorization-exempt configuration information.

14. A method of data transmission, the method comprising:

the method comprises the steps that network equipment sends authorization-free configuration information to terminal equipment, wherein the authorization-free configuration information comprises at least one authorization-free resource configured to the terminal equipment by the network equipment and MCS corresponding to each authorization-free resource in the at least one authorization-free resource; the network equipment receives K retransmission data of first data sent by the terminal equipment by adopting a first MCS on a first authorization-free resource in the at least one authorization-free resource, wherein the first MCS is a MCS corresponding to the first authorization-free resource, and the K is the retransmission times bound with the first authorization-free resource and/or the first MCS.

15. The method of embodiment 14, wherein the binding of K to the first MCS is predefined.

The binding relationship between the MCS and the K is predefined, and the base station only needs to configure the MCS without configuring the K when configuring the relevant transmission parameters, so that the indication overhead of the configuration process is reduced. The UE may have an MCS to determine the corresponding K based on the predefined mapping relationship.

16. The method according to

embodiment

14 or 15, wherein the binding relationship between the K and the first unlicensed resource and/or the first MCS is configured by the network device to the terminal device.

The base station configures the unlicensed resources and/or the binding relationship between the MCS and the K, and the method enables the mapping relationship to have the maximum flexibility.

17. The method as in any of embodiments 14-16, comprising, after the network device receives K retransmitted data of first data sent by the terminal device with a first MCS on a first unlicensed resource of the at least one unlicensed resource:

the network device sends a response of the first data to the terminal device on a first PHICH resource, the first PHICH resource consisting of the first de-granted resource and n_DMRSDetermined of said n_DMRSIncluded in the authorization-exempt configuration information.

18. A method of data transmission, the method comprising:

the method comprises the steps that terminal equipment receives authorization-free configuration information sent by network equipment, wherein the authorization-free configuration information comprises at least one authorization-free resource configured to the terminal equipment by the network equipment and retransmission times corresponding to each authorization-free resource in the at least one authorization-free resource; the terminal equipment determines one authorization-free resource as a first authorization-free resource in the at least one authorization-free resource; and the terminal equipment sends K retransmission data of the first data to the network equipment in the first authorization-free resource, wherein K is the retransmission times corresponding to the first authorization-free resource.

The UE determines the retransmission times bound with the UE based on the configured authorization-free resources, and the retransmission times of different UEs transmitting by using the same authorization-free resource are the same, so that the fairness of transmission among the UEs is ensured.

19. A method of data transmission, the method comprising:

the method comprises the steps that network equipment sends authorization-free configuration information to terminal equipment, wherein the authorization-free configuration information comprises at least one authorization-free resource configured to the terminal equipment by the network equipment and retransmission times corresponding to each authorization-free resource in the at least one authorization-free resource;

the network device receives K retransmission data of the first data sent by the terminal device on a first authorization-free resource in the at least one authorization-free resource, wherein K is the retransmission times corresponding to the first authorization-free resource. The UE determines the retransmission times bound with the UE based on the configured authorization-free resources, and the retransmission times of different UEs transmitting by using the same authorization-free resource are the same, so that the fairness of transmission among the UEs is ensured.

20. A terminal device, the terminal device comprising:

a processor, a memory, and a transceiver; the transceiver is used for receiving and transmitting data; the memory is to store instructions;

the processor is configured to execute the instructions in the memory to perform the method of any of embodiments 1-4.

21. The terminal device of embodiment 20, the transceiver comprising:

a transmitter and a receiver; the receiver is configured to receive a response sent by a network device according to the unlicensed configuration information or the first data in any of embodiments 1 to 4; the transmitter is configured to transmit the first data according to any one of embodiments 1 to 4.

22. A network device, the network device comprising: a processor, a memory, and a transceiver; the transceiver is used for receiving and transmitting data; the memory to store instructions;

the processor is configured to execute the instructions in the memory to perform the method of any of embodiments 10-13.

23. The network device of embodiment 22, the transceiver comprising: a transmitter and a receiver; the receiver is configured to receive the first data according to any one of embodiments 10 to 13 sent by the terminal device; the transmitter is configured to transmit a response to the unlicensed configuration information or the first data according to any of embodiments 10-13.

24. A terminal device, the terminal device comprising:

the processor is configured to execute the instructions in the memory to perform the method of any of embodiments 5-9.

25. The terminal device of embodiment 24, the transceiver comprising:

a transmitter and a receiver; the receiver is configured to receive a response sent by a network device to the unlicensed configuration information or the first data according to any of embodiments 5 to 9; the transmitter is configured to transmit the first data according to any of embodiments 5 to 9.

26. A network device, the network device comprising:

a processor, a memory, and a transceiver; the transceiver is used for receiving and transmitting data; the memory to store instructions;

the processor, configured to execute the instructions in the memory to perform the method of any of embodiments 14-17.

27. The network device of embodiment 26, the transceiver comprising:

a transmitter and a receiver; the receiver is configured to receive the first data, which is sent by the terminal device according to any one of embodiments 14 to 17;

the transmitter is configured to transmit a response to the unlicensed configuration information or the first data as in any of embodiments 14-17.

28. A terminal device, the terminal device comprising:

the processor is configured to execute the instructions in the memory to perform the method of embodiment 18.

29. The terminal device of embodiment 28, the transceiver comprising:

a transmitter and a receiver; the receiver is configured to receive the unlicensed configuration information according to embodiment 18 sent by the network device; the transmitter is used to transmit the first data as described in embodiment 18.

30. A network device, the network device comprising:

the processor, configured to execute the instructions in the memory, performs the method of embodiment 19.

31. The network device of embodiment 30, the transceiver comprising:

a transmitter and a receiver; the receiver is configured to receive the first data according to embodiment 19 sent by the terminal device;

the transmitter is configured to transmit the unlicensed configuration information as described in embodiment 19.

32. A computer program product comprising a computer program which, when executed on a computer, causes the computer to carry out the method of any one of embodiments 1 to 4.

33. A computer program product comprising a computer program which, when executed on a computer, causes the computer to carry out the method of any one of embodiments 5 to 9.

34. A computer program product comprising a computer program which, when executed on a computer, causes the computer to carry out the method of any one of embodiments 10 to 13.

35. A computer program product comprising a computer program which, when executed on a computer, causes the computer to carry out the method of any one of embodiments 14 to 17.

36. A computer program product comprising a computer program which, when executed on a computer, causes the computer to carry out the method of embodiment 18.

37. A computer program product comprising a computer program which, when executed on a computer, causes the computer to carry out the method of embodiment 19.

38. A computer program which, when executed on a computer, causes the computer to carry out the method of any one of embodiments 1 to 4.

39. A computer program which, when executed on a computer, causes the computer to carry out the method of any of embodiments 5 to 9.

40. A computer program which, when executed on a computer, causes the computer to carry out the method of any one of embodiments 10 to 13.

41. A computer program which, when executed on a computer, causes the computer to carry out the method of any one of embodiments 14 to 17.

42. A computer program which, when executed on a computer, causes the computer to carry out the method of embodiment 18.

43. A computer program which, when executed on a computer, causes the computer to carry out the method of embodiment 19.

44. A terminal device configured to perform the method of any of embodiments 1-4.

45. A terminal device configured to perform the method of any of embodiments 5-9.

46. A terminal device configured to perform the method of embodiment 18.

47. A network device configured to perform the method of any of embodiments 10-13.

48. A network device configured to perform the method of any of embodiments 14-17.

49. A network device configured to perform the method of embodiment 19.

50. A computer-readable storage medium having stored thereon a computer program which, when executed on a computer, causes the computer to carry out the method of any of embodiments 1-4.

51. A computer-readable storage medium having stored thereon a computer program which, when executed on a computer, causes the computer to carry out the method of any of embodiments 5-9.

52. A computer-readable storage medium having stored thereon a computer program which, when executed on a computer, causes the computer to carry out the method of any of embodiments 10-13.

53. A computer-readable storage medium having stored thereon a computer program which, when executed on a computer, causes the computer to carry out the method of any of embodiments 14-17.

54. A computer-readable storage medium having stored thereon a computer program which, when executed on a computer, causes the computer to carry out the method of embodiment 18.

55. A computer-readable storage medium having stored thereon a computer program which, when executed on a computer, causes the computer to carry out the method of embodiment 19.

56. A communication system comprising a terminal device as claimed in any one of embodiments 1 to 4 and a network device as claimed in any one of embodiments 10 to 13.

57. A communication system comprising a terminal device as claimed in any of embodiments 5 to 9 and a network device as claimed in any of embodiments 14 to 17.

58. A communication system comprising a terminal device as in embodiment 18 and a network device as in any of embodiment 19.

59. A chip, comprising: a processing module for performing the communication method of any of embodiments 1-4 and a communication interface.

60. The chip of embodiment 59, further comprising a storage module to store instructions, the processing module to execute the instructions stored by the storage module, and execution of the instructions stored in the storage module causes the processing module to perform the communication method of any of embodiments 1-4.

61. A chip, comprising: a processing module for performing the communication method of any of embodiments 5-9 and a communication interface.

62. The chip of embodiment 61, further comprising a memory module to store instructions, the processing module to execute the instructions stored by the memory module, and execution of the instructions stored in the memory module causes the processing module to perform the communication method of any of embodiments 5-9.

63. A chip, comprising: a processing module for performing the communication method of any of embodiments 10-13 is interfaced with a communication.

64. The chip of embodiment 63, further comprising a storage module to store instructions, the processing module to execute the instructions stored by the storage module, and execution of the instructions stored in the storage module causes the processing module to perform the communication method of any of embodiments 10-13.

65. A chip, comprising: a processing module for performing the communication method of any one of embodiments 14-17 and a communication interface.

66. The chip of embodiment 65, further comprising a memory module to store instructions, the processing module to execute the instructions stored by the memory module, and execution of the instructions stored in the memory module causes the processing module to perform the communication method of any of embodiments 14-17.

67. A chip, comprising: a processing module for performing the communication method of embodiment 18 and a communication interface.

68. The chip of embodiment 67, further comprising a memory module to store instructions, the processing module to execute the instructions stored by the memory module, and execution of the instructions stored in the memory module causes the processing module to perform the communication method of embodiment 18.

69. A chip, comprising: a processing module for performing the communication method of embodiment 19 and a communication interface.

70. The chip of embodiment 69, further comprising a memory module to store instructions, the processing module to execute the instructions stored by the memory module, and execution of the instructions stored in the memory module causes the processing module to perform the communication method of embodiment 19.

The present application provides an apparatus (which may be a communication chip) having instructions stored therein, which when run on a device (such as a terminal device or a network device) causes the device to perform one of the above-mentioned method embodiments.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The relevant parts among the method embodiments of the invention can be mutually referred; the apparatus provided in the respective apparatus embodiments is adapted to perform the method provided in the respective method embodiments, so that the respective apparatus embodiments may be understood with reference to the relevant parts in the relevant method embodiments.

The device structure diagrams given in the device embodiments of the invention only show a simplified design of the corresponding devices. In practical applications, the apparatus may comprise any number of transmitters, receivers, processors, memories, etc. to implement the functions or operations performed by the apparatus in the embodiments of the apparatus of the present invention, and all apparatuses that can implement the present invention are within the scope of the present application.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash memory, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable disk, a compact disc read only memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a terminal device. Of course, the processor and the storage medium may reside as discrete components in the terminal device and the network device.

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 the computer program instructions are loaded and executed on a computer, the procedures or functions described in accordance with the present application are generated, 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 or transmitted over a computer-readable storage medium. The computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)), or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., Digital Versatile Disk (DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), etc.

The above-mentioned embodiments, objects, technical solutions and advantages of the present application are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present application should be included in the scope of the present application.

Claims

1. A method for transmitting uplink data, comprising:

the terminal equipment determines N according to reference information, wherein N is the transmission times of the terminal equipment for transmitting the transmission block, the reference information and N have a preset corresponding relation, and N is an integer greater than or equal to 1;

the terminal equipment sends N uplink data according to an authorization-free transmission mode, wherein the N uplink data comprise initial transmission data and N-1 retransmission data of the transmission block;

the reference information includes at least one of a channel quality, a traffic type of the transport block, a modulation and coding scheme, MCS, and at least one unlicensed transmission resource usable for transmitting the transport block.

2. The method of claim 1, wherein N is less than or equal to K, K is a predetermined maximum number of transmissions, and K is an integer greater than or equal to 1.

3. The method of claim 1, wherein the reference information comprises at least two unlicensed transmission resources available for transmitting the transport block; the terminal equipment determines N according to the reference information, and the method comprises the following steps:

the terminal equipment determines target authorization-free transmission resources from the at least two authorization-free transmission resources according to the channel quality and/or the service type of the transmission block, wherein the target authorization-free transmission resources are authorization-free transmission resources used for transmitting the transmission block;

and the terminal equipment determines N according to the target authorization-free transmission resource, wherein a preset corresponding relation exists between the target authorization-free transmission resource and the N.

4. The method according to claim 3, wherein the determining, by the terminal device, N according to the target unlicensed transmission resource, where a preset correspondence exists between the target unlicensed transmission resource and N includes:

the terminal equipment determines the MCS according to the target authorization-free transmission resource, and the target authorization-free transmission resource and the MCS have a preset corresponding relationship;

and the terminal equipment determines N according to the MCS, and a preset corresponding relation exists between the MCS and the N.

5. The method according to any one of claims 1 to 4, wherein before the terminal device determines N according to the reference information, the method further comprises:

and the terminal equipment receives configuration information, wherein the configuration information is used for configuring the corresponding relation between the reference information and the N.

6. A method for receiving uplink data, comprising:

the method comprises the steps that network equipment sends configuration information, the configuration information is used for configuring the corresponding relation between reference information and N, the N is the number of times that terminal equipment transmits a transmission block in an authorization-free transmission mode, the N is an integer larger than or equal to 1, and the corresponding relation between the reference information and the N is used for the terminal equipment to determine the N corresponding to the reference information according to the reference information;

the network equipment receives N uplink data from the terminal equipment, wherein the N uplink data comprise initial transmission data and N-1 retransmission data of the transmission block;

7. An apparatus for transmitting uplink data, comprising a processing unit and a communication unit,

the processing unit is used for determining N according to reference information, wherein N is the transmission times of the device for sending the uplink data for transmitting the transmission block, the reference information and N have a preset corresponding relation, and N is an integer greater than or equal to 1;

the communication unit is used for sending N uplink data according to an authorization-free transmission mode, wherein the N uplink data comprise initial transmission data and N-1 retransmission data of the transmission block;

8. An apparatus for receiving uplink data, comprising a processing unit and a communication unit, wherein the processing unit is configured to support the communication unit to perform:

receiving N uplink data from the terminal device, wherein the N uplink data comprise initial transmission data and N-1 retransmission data of the transmission block;

9. An apparatus for wireless communication, having instructions stored thereon that, when executed on a device on which the apparatus is installed, cause the device to perform the method of any of claims 1-6.