CN111585718B

CN111585718B - Method and equipment used in UE (user Equipment) and base station for exempting from grant

Info

Publication number: CN111585718B
Application number: CN202010342087.6A
Authority: CN
Inventors: 蒋琦
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2016-09-24
Filing date: 2016-09-24
Publication date: 2022-03-29
Anticipated expiration: 2036-09-24
Also published as: CN111585718A; CN111585717A; CN107872299B; CN107872299A

Abstract

The invention discloses a method and a device used in a grant-free UE, a base station, the UE sends a first wireless signal and then receives first information. The first information is used to determine whether the first wireless signal was received correctly. The first information is used for determining at least one of { whether to receive the second information, time-frequency resources occupied by the second information }. The first wireless signal occupies a first air interface resource selected by the UE. One of the air interface resources comprises at least the former one of { one time-frequency resource and one multiple access signature }. According to the invention, through designing the first information and the second information, the resources for downlink feedback of uplink transmission under the condition of no grant are flexibly configured, so that the resource waste caused by reserving too many resources for downlink feedback when the number of the UE is large is avoided, and the frequency spectrum efficiency of the system is further improved.

Description

Method and equipment used in UE (user Equipment) and base station for exempting from grant

The present application is a divisional application of the following original applications:

application date of the original application: 2016.09.24

- -application number of the original application: 201610849058.2

The invention of the original application is named: method and equipment used in UE (user Equipment) and base station for exempting from grant

Technical Field

The present invention relates to transmission schemes for wireless signals in wireless communication systems, and more particularly, to methods and apparatus used for grant-less wireless transmission.

Background

In a conventional wireless communication system based on a digital modulation scheme, for example, in a 3GPP (3rd Generation Partner Project) cellular system, uplink wireless signal transmission is scheduled by a base station. According to the conclusion of the 3GPP RAN1(Radio Access Network) #84bis conference, in order to reduce the overhead of system scheduling signaling, the next generation wireless communication system will study the application of the Autonomous (Autonomous) Based/grant free/competitive (Contentioned Based) non-orthogonal multiple Access mode in various NR (New Radio) application scenarios. At least for uplink mtc (large Machine-Type Communications), autonomous/grant-free/contention-based non-orthogonal multiple access needs to be studied.

Non-orthogonal multiple access faces many problems not found in conventional orthogonal multiple access, such as how to perform downlink feedback on grant-less-based uplink transmission to ensure that the UE can know whether the transmitted uplink data is correctly received by the base station. The above problems need to be further studied and discussed.

Disclosure of Invention

The inventor finds, through research, that under autonomous/grant-free/contention-based non-orthogonal multiple access, a base station cannot predict which UEs receive uplink transmissions correctly or incorrectly on which time-frequency resources, and thus cannot feed back HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgement) of uplink transmissions through a PHICH (Physical Hybrid ARQ Indicator Channel) as in the existing system. Meanwhile, considering the original purpose of simultaneous uplink transmission and Grant-free design of multiple UEs, it is also an inefficient scheme to implicitly indicate downlink HARQ-ACK for uplink transmission through NDI (New Data Indicator) in UL Grant.

To solve the above problem, a simple way is that the base station reserves a time-frequency resource for transmitting downlink feedback for each air interface resource with grant-free transmission, and an ID (Identity) of the sending UE corresponding to the data received in the air interface resource needs to be embedded in the time-frequency resource, so that the receiving UE can determine whether the feedback on the time-frequency resource is for its own data transmission, but not for data transmission of other UEs. However, the current NR-discussed grant-free transmission scenarios are all based on the situation that the number of users is large, and when the number of actually transmitted users changes in real time, this method needs to reserve downlink feedback resources according to the maximum number of simultaneously transmitted users, which causes huge waste of resources and reduces spectrum efficiency.

The present invention provides a solution to the above problems. It should be noted that the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict. For example, embodiments and features in embodiments in the UE of the present application may be applied in a base station and vice versa.

The invention discloses a method used in a grant-free UE, which comprises the following steps:

-step a. transmitting a first wireless signal;

-step b.

Wherein the first information is used to determine whether the first wireless signal was correctly received. The first information is used for determining at least one of { whether to receive the second information, time-frequency resources occupied by the second information }. The first wireless signal occupies a first air interface resource, the first air interface resource being selected by the UE. One of the air interface resources comprises at least the former one of { one time-frequency resource and one multiple access signature }.

As an embodiment, the method has a benefit that part of the information in the first information indicates whether uplink data is correctly received on air interface resources, and the information of which UE the uplink data belongs to is put in the second information to indicate that when the number of uplink data detected by the base station is small, the number of existing second information is small, so that resources occupied by downlink feedback can be reduced, and spectrum efficiency can be improved.

As one embodiment, the first information is dynamically configured.

For one embodiment, the first information is transmitted on a physical layer control channel.

As an embodiment, the Multiple Access Signature (Multiple Access Signature) includes at least one of { sequence, Codebook (Codebook)/Codeword (Codeword), interleaving or mapping pattern (pattern), Demodulation reference signal (Demodulation reference signal), Preamble (Preamble), Spatial-dimension (Spatial-dimension), and Power-dimension (Power-dimension) }.

As an embodiment, the first wireless signal occupies only one air interface resource.

Specifically, according to an aspect of the present invention, the method is characterized in that the step a further includes the steps of:

step A0. receives the first signaling.

Wherein the first signaling is used to determine a first resource pool to which the first air interface resource belongs. The first resource pool comprises a positive integer of the air interface resources.

As an embodiment, the first Signaling is a Higher Layer Signaling (high Layer Signaling).

As an embodiment, the first signaling includes one or more RRC (Radio Resource Control) IE (Information Element).

As an embodiment, the UE selects the first empty resource from the first resource pool.

As an embodiment, the first signaling is used to determine time domain resources and frequency domain resources occupied by the first resource pool.

As an embodiment, the first signaling is used to determine a multiple access signature employed by the first resource pool.

As an embodiment, the first signaling is used to determine the time-frequency resources comprised by the first resource pool.

As an embodiment, each of the time-frequency resources in the first resource pool belongs to Q air interface resources, where the Q air interface resources respectively include Q multiple access signatures, and Q is a positive integer greater than 1.

As a sub-embodiment of this embodiment, said Q multiple access signatures are configured by said first signaling.

As a sub-embodiment of this embodiment, said Q of said multiple access signatures are default.

As an embodiment, one of the time-frequency resources includes a positive integer number of RUs (Resource units), which occupy one subcarrier in the frequency domain and one multicarrier symbol in the time domain.

As a sub-embodiment of this embodiment, the duration of the one multicarrier symbol is equal to the inverse of the corresponding subcarrier spacing of the RU, the unit of the duration of the one multicarrier symbol is seconds, and the unit of the corresponding subcarrier spacing of the RU is hertz.

As a sub-embodiment of this embodiment, the duration of the one multicarrier symbol does not include the duration of a CP (Cyclic Prefix).

As an embodiment, the Multi-Carrier symbol in the present invention is one of { OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single-Carrier Frequency Division Multiplexing Access) symbol, FBMC (Filter Bank Multi-Carrier) symbol, OFDM symbol including CP, DFT-s-OFDM (Discrete Fourier Transform Spreading Orthogonal Frequency Division Multiplexing) symbol including CP }.

As an embodiment, the air interface resources included in the first resource pool all occupy the same number of RUs.

For one embodiment, the first resource pool includes a plurality of time units in a time domain.

As a sub-embodiment of this embodiment, the time unit is a duration of a positive integer number of multicarrier symbols.

As a sub-embodiment of this embodiment, the time unit is the duration of one multicarrier symbol.

As a sub-embodiment of this embodiment, the plurality of time units are discontinuous in the time domain.

As a sub-embodiment of this embodiment, the plurality of time units are consecutive in the time domain.

As one embodiment, the first resource pool includes a plurality of frequency units in a frequency domain.

As a sub-embodiment of this embodiment, the frequency unit is a bandwidth occupied by a positive integer number of subcarriers.

As a sub-embodiment of this embodiment, the frequency unit is a bandwidth occupied by one subcarrier.

As a sub-embodiment of this embodiment, the plurality of frequency units are discontinuous in the frequency domain.

As a sub-embodiment of this embodiment, the plurality of frequency units are contiguous in the frequency domain.

Specifically, according to an aspect of the present invention, the method is characterized in that the step B further includes the steps of:

-step b1. receiving second information.

Wherein the second information is used to determine at least one of { whether the first wireless signal was correctly received, scheduling information for a second wireless signal }. The scheduling information comprises at least one of { occupied time-frequency resource, occupied multiple access signature, MCS and timing adjustment }. The sender of the second wireless signal is the sender of the first wireless signal.

As an embodiment, the foregoing method has an advantage that the base station may select to improve the transmission accuracy of the second wireless signal by performing base station scheduling-based transmission on the second wireless signal, and further improve the retransmission efficiency directly by scheduling-based transmission when grant-free air interface resources are congested.

For one embodiment, the second information is transmitted on a physical layer control channel.

For one embodiment, the second information is transmitted on a physical layer data channel.

As an embodiment, the timing adjustment is used to ensure that the UE maintains uplink synchronization with a sender of the first information when transmitting the second wireless signal.

Specifically, according to one aspect of the present invention, the above method is characterized in that if the first ID is equal to the second ID, the first wireless signal is determined to be correctly received; otherwise the first wireless signal is determined to have not been correctly received. Wherein the first information indicates that a sender of the first information correctly receives a wireless signal on the first air interface resource, the first wireless signal is used to determine the first ID, the second information is used to determine the second ID, and the first ID and the second ID are integers respectively.

As an example, the above method has the benefits of: because one air interface resource may be selected by multiple UEs without knowing that a collision occurs between the multiple UEs, it is ensured that the UE can definitely know whether the first information is downlink feedback of itself by designing the first ID and the second ID.

As an embodiment, the UE determines to receive the second information by default, i.e. the first information implicitly determines to receive the second information.

As an embodiment, the second information includes X information bits, a value of the X information bits is equal to the second ID, and X is a positive integer greater than 1.

As a sub-embodiment of this embodiment, X is an even number.

As a sub-embodiment of this embodiment, the X is greater than or equal to 8 and less than or equal to 32.

Specifically, according to an aspect of the present invention, the method is characterized in that the first information indicates that a sender of the first information fails to correctly receive a wireless signal on the first air interface resource, and the first wireless signal is determined to be incorrectly received. The first information indicates not to receive the second information; or the first information indicates reception of the second information, the second information being used to determine scheduling information for the second wireless signal.

As an embodiment, the first information indicates not to receive the second information, and the UE retransmits the transmission information corresponding to the first wireless signal based on a grant-free manner.

As an embodiment, when the first information indicates to receive the second information, the UE transmits the second wireless signal according to the second information, and the second wireless signal is a retransmission of the first wireless signal.

As a sub-embodiment of this embodiment, the above-described embodiment has the advantage of ensuring that the second radio signal is correctly received by the base station by means of a scheduling based transmission.

-a step a1. transmitting a second radio signal.

Wherein the second information is used to determine scheduling information for the second wireless signal.

As an embodiment, the first wireless signal and the second wireless signal belong to one HARQ process.

As an embodiment, the first wireless signal and the second wireless signal are respectively generated by different TBs (Transport blocks).

As an embodiment, a first block of bits is used to determine the first wireless signal and a first block of bits is used to determine the second wireless signal.

As a sub-embodiment of this embodiment, the first bit Block is a Transport Block (TB).

As a sub-embodiment of this embodiment, the first wireless signal and the second wireless signal are respectively output after the first bit block sequentially undergoes Channel Coding (Channel Coding), Modulation Mapper (Modulation Mapper), Layer Mapper (Layer Mapper), Precoding (Precoding), Resource Element Mapper (Resource Element Mapper), and OFDM signal Generation (Generation).

As an embodiment, the first wireless signal and the second wireless signal correspond to different RVs (Redundancy versions).

As an embodiment, the RU occupied by the second wireless signal does not belong to the RU occupied by the first resource pool.

In one embodiment, the first air interface resource includes a given multiple access signature set, and multiple access signatures in the given multiple access signature set are not used for the second wireless signal.

As one embodiment, the first wireless signal employs a given multiple access signature that is not used for the second wireless signal.

Specifically, according to an aspect of the present invention, the method is characterized in that the first information includes Q1 pieces of sub information, and the Q1 pieces of sub information are respectively used to determine whether there are correctly received wireless signals on Q1 air interface resources. The first air interface resource is one of the Q1 air interface resources. Q1 is a positive integer greater than 1. The Q1 pieces of sub information include a first sub information, and the first sub information is associated with the first air interface resource.

As an embodiment, the method has the advantage of allocating sub information to all air interface resources in the first resource pool, so as to ensure that uplink transmissions occurring on all air interface resources have feedback.

As an embodiment, the Q1 air interface resources constitute the first resource pool.

As an embodiment, the Q1 sub information corresponds to the Q1 air interface resources one by one.

As a sub-embodiment of this embodiment, sub information # i in the Q1 sub information corresponds to an air interface resource # i in the Q1 air interface resources. The sub information # i is the (i +1) th sub information of the Q1 sub information, the air interface resource # i is the (i +1) th air interface resource of the Q1 air interface resources, and i is a positive integer not less than 0 and less than Q1.

As a sub-embodiment of this embodiment, the Q1 air interface resources are ordered according to a { code domain first, frequency domain second, time domain third }.

As a sub-embodiment of this embodiment, the Q1 air interface resources are ordered according to a { code domain first, time domain second, frequency domain third }.

As a sub-embodiment of this embodiment, the ordering manner of the Q1 air interface resources is predefined or fixed.

As an embodiment, the sub information includes 1 information bit, and the 1 information bit indicates whether a sender of the first information correctly receives a radio signal on the corresponding air interface resource.

As an embodiment, the sub information is composed of 2 information bits, and the four states corresponding to the 2 information bits are a first state, a second state, a third state, and a fourth state, respectively. The first status indicates that a sender of the first information correctly receives wireless signals on the corresponding air interface resource.

As a sub-embodiment of this embodiment, for the first sub-information, the second state indicates that a sender of the first information fails to correctly receive a wireless signal on the corresponding air interface resource and does not need to receive the second information (i.e., the second information does not exist).

As a sub-embodiment of this embodiment, for the first sub-information, the third state indicates that a sender of the first information fails to correctly receive a radio signal on the corresponding air interface resource and needs to receive the second information (that is, the second information exists).

As a sub-embodiment of this embodiment, the fourth state is Reserved (Reserved).

As a sub-embodiment of this embodiment, the first state, the second state, the third state, and the fourth state are 00, 01, 10, and 11, respectively.

As a sub-embodiment of this embodiment, the first state, the second state, the third state, and the fourth state are 11, 10, 01, 00, respectively.

As a sub-embodiment of this embodiment, the above four-state design has the benefits of: a first state indicating that the first wireless signal was received correctly; the second state is used for indicating that no signal is detected on the first air interface resource; the third status is used to indicate that the first radio signal of the UE is detected on the first air interface resource but not correctly received. The third state is designed to enable the base station to receive the second wireless signal subsequently, and combine the second wireless signal and the first wireless signal to realize a combining gain, thereby improving the transmission performance.

Specifically, according to an aspect of the present invention, the above method is characterized in that the second information is one of Q2 candidate information. The first information is used to determine at least one of { the Q2, the position of the second information in the Q2 candidate information }. Q2 is a positive integer.

As an embodiment, the Q2 is less than or equal to the Q1.

As an embodiment, the Q2 candidate messages each contain the same number of information bits.

As an embodiment, the sub information includes 1 information bit, and the 1 information bit indicates whether a sender of the first information correctly receives a radio signal on the corresponding air interface resource. The Q2 is equal to the number of target sub information in the Q1 sub information, and the target sub information indicates that there is a correctly received wireless signal on the corresponding air interface resource.

As a sub-implementation of this embodiment, the Q2 is equal to the number of sub information of which corresponding state belongs to a candidate state set of at least two of { first state, second state, third state, fourth state } in the Q1 sub information.

As a subsidiary embodiment of this sub-embodiment, said set of candidate states comprises { first state, third state }.

As an additional embodiment of the sub-embodiment, meanings of the candidate information corresponding to different states in the candidate state set are different.

As an embodiment, the Q2 candidate information constitute a target information set, the second information belongs to the target information set, and the target information set includes information bit number related to the value of Q2.

As a sub-embodiment of this embodiment, the set of target information is dynamically changing.

As a sub-embodiment of this embodiment, the number of information bits included in the target information set is dynamically changed.

As a sub-embodiment of this embodiment, the number of information bits included in the target information set is linearly related to Q2.

As an embodiment, the above embodiments and sub-implementations have the advantage that the size of the target information set is dynamically changed and related to the wireless signals correctly received by the base station in the first resource pool, and this design further reduces the load of the control signaling and improves the spectrum efficiency.

The invention discloses a method used in a grant-free base station, which comprises the following steps:

-step a. receiving a first wireless signal;

-step b.

Wherein the first information is used to determine whether the first wireless signal was correctly received. The first information is used for determining at least one of { whether to receive the second information, time-frequency resources occupied by the second information }. The first wireless signal occupies a first air interface resource, and one air interface resource comprises at least the former of { a time-frequency resource and a multiple access signature }.

step A0. sends the first signaling.

Wherein the first signaling is used to determine a first resource pool in which the base station blindly detects the first wireless signal. The first resource pool comprises a positive integer of the air interface resources.

-step b1. sending the second information.

Wherein the second information is used to determine at least one of { whether the first wireless signal was correctly received, scheduling information for a second wireless signal }. The scheduling information comprises at least one of { occupied time-frequency resource, occupied multiple access signature, MCS and timing adjustment }.

Specifically, according to an aspect of the present invention, the method is characterized in that the first information indicates that the base station fails to correctly receive a wireless signal on the first air interface resource, and the first wireless signal is determined to be incorrectly received. The first information indicates not to receive the second information; or the first information indicates reception of the second information, the second information being used to determine scheduling information for the second wireless signal.

-a step a1. receiving a second radio signal.

The invention discloses a user equipment used for free grant, which comprises the following modules:

-a first processing module: for transmitting a first wireless signal;

-a first receiving module: for receiving the first information.

As an embodiment, the first processing module is further configured to receive a first signaling. The first signaling is used to determine a first resource pool to which the first air interface resource belongs. The first resource pool comprises a positive integer of the air interface resources.

For one embodiment, the first processing module is further configured to transmit a second wireless signal. The second information is used to determine scheduling information for the second wireless signal.

As an embodiment, the first receiving module is further configured to receive second information. The second information is used to determine at least one of { whether the first wireless signal was correctly received, scheduling information for a second wireless signal }. The scheduling information comprises at least one of { occupied time-frequency resource, occupied multiple access signature, MCS and timing adjustment }. The sender of the second wireless signal is the sender of the first wireless signal.

Specifically, according to one aspect of the present invention, the above apparatus is characterized in that if the first ID is equal to the second ID, the first wireless signal is determined to be correctly received; otherwise the first wireless signal is determined to have not been correctly received. Wherein the first information indicates that a sender of the first information correctly receives a wireless signal on the first air interface resource, the first wireless signal is used to determine the first ID, the second information is used to determine the second ID, and the first ID and the second ID are integers respectively.

Specifically, according to an aspect of the present invention, the apparatus is characterized in that the first information indicates that a sender of the first information fails to correctly receive a wireless signal on the first air interface resource, and the first wireless signal is determined not to be correctly received. The first information indicates not to receive the second information; or the first information indicates reception of the second information, the second information being used to determine scheduling information for the second wireless signal.

Specifically, according to an aspect of the present invention, the above-mentioned device is characterized in that the first information includes Q1 pieces of sub information, and the Q1 pieces of sub information are respectively used to determine whether there are correctly received wireless signals on Q1 air interface resources. The first air interface resource is one of the Q1 air interface resources. Q1 is a positive integer greater than 1. The Q1 pieces of sub information include a first sub information, and the first sub information is associated with the first air interface resource.

Specifically, according to an aspect of the present invention, the above apparatus is characterized in that the second information is one of Q2 pieces of candidate information. The first information is used to determine at least one of { the Q2, the position of the second information in the Q2 candidate information }. Q2 is a positive integer.

The invention discloses base station equipment used for free grant, which comprises the following modules:

-a second processing module: for receiving a first wireless signal;

-a first sending module: for transmitting the first information.

As an embodiment, the second processing module is further configured to send a first signaling. The first signaling is used to determine a first resource pool to which the first air interface resource belongs. The first resource pool comprises a positive integer of the air interface resources.

For one embodiment, the second processing module is further configured to receive a second wireless signal. The second information is used to determine scheduling information for the second wireless signal.

As an embodiment, the first sending module is further configured to send second information. The second information is used to determine at least one of { whether the first wireless signal was correctly received, scheduling information for a second wireless signal }. The scheduling information comprises at least one of { occupied time-frequency resource, occupied multiple access signature, MCS and timing adjustment }. The sender of the second wireless signal is the sender of the first wireless signal.

Compared with the prior art, the invention has the following technical advantages:

by designing the first information and the second information, the resource for downlink feedback for uplink transmission under the grant-free condition is flexibly configured, so that resource waste caused by reserving too many resources for downlink feedback when the number of UEs is large is avoided, and the spectrum efficiency of the system is further improved.

Designing Q1 sub information in the first information to determine the number of information bits occupied by the target information set, so as to avoid the spectrum efficiency reduction caused by the second information occupying too much resources.

Designing the first resource pool to provide a plurality of air interface resources capable of transmitting the first wireless signal for the UE, and reducing the complexity of blind detection of the first wireless signal at the base station side.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 shows a flow diagram of a first wireless signal transmission according to an embodiment of the invention;

fig. 2 illustrates a flowchart of a UE determining whether to receive second information according to one embodiment of the present invention;

fig. 3 illustrates a flowchart of a UE determining whether to transmit a second wireless signal according to one embodiment of the present invention;

FIG. 4 is a diagram illustrating a mapping of sub information and candidate information according to one embodiment of the invention;

fig. 5 shows a schematic diagram of a resource mapping of a first resource pool in the time-frequency domain according to an embodiment of the invention;

fig. 6 is a schematic diagram illustrating resource mapping of air interface resources according to an embodiment of the present invention;

fig. 7 shows a block diagram of a processing device in a UE according to an embodiment of the invention;

fig. 8 shows a block diagram of a processing device in a base station according to an embodiment of the invention.

Detailed Description

The technical solutions of the present invention will be further described in detail with reference to the accompanying drawings, and it should be noted that the features of the embodiments and examples of the present application may be arbitrarily combined with each other without conflict.

Example 1

Embodiment 1 illustrates a flow chart of a first wireless signal transmission, as shown in fig. 1. In fig. 1, base station N1 is a serving cell maintaining base station for UE U2. The steps identified in block F0, block F1, and block F2 are optional.

For theBase station N1First signaling is transmitted in step S10, a first wireless signal is received in step S11, first information is transmitted in step S12, second information is transmitted in step S13, and a second wireless signal is received in step S14.

For theUE U2The first signaling is received in step S20, the first wireless signal is transmitted in step S21, the first information is received in step S22, the second information is received in step S23, and the second wireless signal is transmitted in step S24.

As a sub-embodiment, the first signaling is Cell-specific (Cell-specific).

As a sub-embodiment, the transmission Channel corresponding to the first wireless signal is an UL-SCH (Uplink Shared Channel).

As a sub-embodiment, the transmission channel corresponding to the second wireless signal is UL-SCH.

As a sub-embodiment, the first signaling is specific to a TRP (Transmission Reception Point).

As an additional embodiment of this sub-embodiment, the TRP is a TRP included in the base station N1.

Example 2

Embodiment 2 illustrates a flowchart of determining whether to receive the second information by the UE, as shown in fig. 2.

For the UE U3, receiving first information in step S30; determining whether the second information is received in step S31; if so, second information is received in step S32, otherwise Go to (Go to) end (the end). Wherein the first information is used to determine whether to receive second information. The first information includes Q1 pieces of sub information, and the Q1 pieces of sub information are respectively used for determining whether wireless signals which are correctly received exist on Q1 air interface resources. The first air interface resource is one of the Q1 air interface resources. Q1 is a positive integer greater than 1. The Q1 pieces of sub information include a first sub information, and the first sub information is associated with the first air interface resource.

As sub-embodiment 1 of embodiment 2, the sub information includes 1 information bit, and the 1 information bit indicates whether a sender of the first information correctly receives a radio signal on the corresponding air interface resource. If the first sub-information indicates correct reception of the wireless signal on the first air interface resource, the UE determines to receive the second information in step S31; otherwise, the UE determines not to receive the second information in step S31.

As sub-embodiment 2 of embodiment 2, the sub information is composed of 2 information bits, and the four states corresponding to the 2 information bits are a first state, a second state, a third state, and a fourth state, respectively. If the state corresponding to the first sub-information belongs to the candidate state set, the UE determines to receive the second information in step S31; otherwise, the UE determines not to receive the second information in step S31. The set of candidate states includes at least two of { first state, second state, third state, fourth state }. The first state, the second state, the third state, and the fourth state are 00, 01, 10, and 11, respectively.

Example 3

Embodiment 3 illustrates a flowchart of the UE determining whether to transmit the second wireless signal, as shown in fig. 3.

For the UE U4, receiving first information in step S40; determining whether the second information is received in step S41; if so, receiving second information in step S42, otherwise Go to (Go to) end (the end); determining whether to transmit the second wireless signal in step S43; if so, a second wireless signal is sent in step S44, otherwise the process goes to the end. Wherein the first information is used to determine whether to receive second information. The first information includes Q1 pieces of sub information, and the Q1 pieces of sub information are respectively used for determining whether wireless signals which are correctly received exist on Q1 air interface resources. The first air interface resource is one of the Q1 air interface resources. Q1 is a positive integer greater than 1. The Q1 pieces of sub information include a first sub information, and the first sub information is associated with the first air interface resource.

As sub-embodiment 1 of embodiment 3, the first information is used to determine whether to transmit the second wireless signal. The sub information is composed of 2 information bits, and four states corresponding to the 2 information bits are respectively a first state, a second state, a third state and a fourth state. If the state corresponding to the first sub-information belongs to a first target state set and the UE correctly receives the second information, the UE determines to send a second wireless signal in step S43; if the state corresponding to the first sub information belongs to the second target state set, the UE determines not to send the second wireless signal in step S43. The first and second target state sets comprise at least one of { first state, second state, third state, fourth state } respectively. The first state, the second state, the third state, and the fourth state are 00, 01, 10, and 11, respectively.

As sub-embodiment 2 of embodiment 3, the first sub-information indicates that the UE U4 correctly receives a wireless signal on the first air interface resource, and the first sub-information indicates an information type of the second information. The information type of the second information is one of { second ID, scheduling information of a second wireless signal }, the second ID being used to determine whether the first wireless signal is correctly received. The scheduling information comprises at least one of { occupied time-frequency resource, occupied multiple access signature, MCS and timing adjustment }. The sender of the second wireless signal is the sender of the first wireless signal. If the first ID is equal to the second ID, the first wireless signal is determined to be correctly received; otherwise the first wireless signal is determined to have not been correctly received. Wherein the first wireless signal is used to determine the first ID, the first ID and the second ID each being an integer.

Example 4

Embodiment 4 illustrates a schematic diagram of mapping of sub information and candidate information, as shown in fig. 4.

In embodiment 4, the first information includes Q1 pieces of sub information { #1, #2, …, # Q1}, and the Q1 pieces of sub information are respectively used to determine whether there are correctly received radio signals on Q1 air interface resources. The first air interface resource is one of the Q1 air interface resources. Q1 is a positive integer greater than 1. The Q1 pieces of sub information include a first sub information, and the first sub information is associated with a first air interface resource.

In embodiment 4, the second information is one of Q2 candidate information, and the Q2 candidate information are the candidate information { #1, #2, …, # Q2 }. The first information is used to determine the Q2.

In embodiment 4, Q2 pieces of sub information out of the Q1 pieces of sub information respectively correspond to the Q2 pieces of candidate information one by one, as indicated by arrows AR _1, AR _2, and AR _ Q2.

As sub-embodiment 1 of embodiment 4, the Q2 candidate information are jointly coded, i.e. the Q2 candidate information belongs to one Code Block of the channel encoder.

As sub-embodiment 2 of embodiment 4, the Q2 candidate information are independently coded, i.e. the UE is able to perform a decoding operation on only one of the candidate information.

As sub-embodiment 3 of embodiment 4, the candidate information includes a UE ID (Identifier).

As a sub-embodiment 4 of embodiment 4, some of the Q2 candidate information include a UE ID, and some of the Q2 candidate information include configuration information of a wireless signal.

Example 5

Embodiment 5 illustrates a schematic diagram of resource mapping of a first resource pool in a time-frequency domain in the present invention, as shown in fig. 5. In fig. 5, a rectangular grid with numerical labels represents a time-frequency resource, the time-frequency resources with different labels are continuously distributed in a time-frequency domain, the first resource pool includes P time-frequency resources, and P is a positive integer. The time frequency resources occupy a positive integer number of RUs.

As a sub-embodiment, the number of RUs occupied by one time-frequency resource is equal to the number of RUs occupied by one air interface resource in the present invention.

As a sub-embodiment, one of the time-frequency resources includes Q air interface resources, where Q is a positive integer greater than 1.

As an auxiliary embodiment of the sub-embodiment, the first resource pool includes Q × P air interface resources.

As a sub-embodiment, the first wireless signal occupies only one of the air interface resources.

Example 6

Embodiment 6 illustrates a schematic diagram of resource mapping of air interface resources. As shown in fig. 6, Q air interface resources shown in the figure belong to a given time-frequency resource, where the given time-frequency resource is one of the time-frequency resources included in the first resource pool.

Example 7

Embodiment 7 illustrates a block diagram of a processing device in a UE, as shown in fig. 7. In fig. 7, the UE processing apparatus 100 is mainly composed of a first processing module 101 and a first receiving module 102.

The first processing module 101: for transmitting a first wireless signal;

the first receiving module 102: for receiving the first information.

In embodiment 7, the first information is used to determine whether the first wireless signal was correctly received. The first information is used for determining at least one of { whether to receive the second information, time-frequency resources occupied by the second information }. The first wireless signal occupies a first air interface resource, the first air interface resource being selected by the UE. One of the air interface resources comprises at least the former one of { one time-frequency resource and one multiple access signature }.

As a sub embodiment, the first processing module 101 is further configured to receive a first signaling. The first signaling is used to determine a first resource pool to which the first air interface resource belongs. The first resource pool comprises a positive integer of the air interface resources.

As a sub-embodiment, the first processing module 101 is further configured to transmit a second wireless signal. The second information is used to determine scheduling information for the second wireless signal.

As a sub embodiment, the first receiving module 102 is further configured to receive second information. The second information is used to determine at least one of { whether the first wireless signal was correctly received, scheduling information for a second wireless signal }. The scheduling information comprises at least one of { occupied time-frequency resource, occupied multiple access signature, MCS and timing adjustment }. The sender of the second wireless signal is the sender of the first wireless signal.

Example 8

Embodiment 8 is a block diagram illustrating a processing apparatus in a base station device, as shown in fig. 5. In fig. 8, the base station device processing apparatus 200 mainly comprises a second processing module 201 and a second sending module 202.

The second processing module 201: for receiving a first wireless signal;

first sending module 202: for transmitting the first information.

In embodiment 8, the first information is used to determine whether the first wireless signal was received correctly. The first information is used for determining at least one of { whether to receive the second information, time-frequency resources occupied by the second information }. The first wireless signal occupies a first air interface resource, and one air interface resource comprises at least the former of { a time-frequency resource and a multiple access signature }.

As a sub embodiment, the second processing module 201 is further configured to send a first signaling. The first signaling is used to determine a first resource pool to which the first air interface resource belongs. The first resource pool comprises a positive integer of the air interface resources.

As a sub-embodiment, the second processing module 201 is further configured to receive a second wireless signal. The second information is used to determine scheduling information for the second wireless signal.

As a sub embodiment, the first sending module 202 is further configured to send second information. The second information is used to determine at least one of { whether the first wireless signal was correctly received, scheduling information for a second wireless signal }. The scheduling information comprises at least one of { occupied time-frequency resource, occupied multiple access signature, MCS and timing adjustment }. The sender of the second wireless signal is the sender of the first wireless signal.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The UE and the terminal in the present invention include, but are not limited to, a mobile phone, a tablet computer, a notebook computer, a vehicle-mounted Communication device, a wireless sensor, a network card, an internet of things terminal, an RFID terminal, an NB-IOT terminal, an MTC (Machine Type Communication) terminal, an eMTC (enhanced MTC) terminal, a data card, a network card, a vehicle-mounted Communication device, a low-cost mobile phone, a low-cost tablet computer, and other wireless Communication devices. The base station in the present invention includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method in a grant-free user equipment, comprising the steps of:

-step a. transmitting a first wireless signal;

-step b. receiving first information;

wherein the first information is used to determine whether the first wireless signal was received correctly; the first information is used to determine whether to receive second information; the first wireless signal occupies a first air interface resource, which is selected by the user equipment; one of the air interface resources comprises at least the former one of a time frequency resource and a multiple access signature; the second information is used to determine whether the first wireless signal was correctly received and scheduling information for a second wireless signal; the scheduling information comprises occupied time-frequency resources and timing adjustment; one of the time-frequency resources includes a positive integer number of resource units RU, and the resource units occupy one subcarrier in a frequency domain and occupy a duration of one multicarrier symbol in a time domain.

2. The method in the UE according to claim 1, wherein the step A comprises:

step A0. receives the first signaling;

wherein the first signaling is used to determine a first resource pool to which the first air interface resource belongs; the first resource pool comprises a positive integer of the air interface resources.

3. The method according to claim 2, wherein each of the time-frequency resources in the first resource pool belongs to Q air interface resources, the Q air interface resources respectively include Q multiple access signatures, Q is a positive integer greater than 1, and the Q multiple access signatures are configured by the first signaling.

4. The method in the UE of claim 3, wherein the step B further comprises:

step B1, receiving the second information;

wherein the sender of the second wireless signal is the sender of the first wireless signal.

5. The method in a user equipment according to claim 4, characterized in that if the first ID is equal to the second ID, the first radio signal is determined to be correctly received; otherwise the first wireless signal is determined to have not been correctly received; wherein the first information indicates that a sender of the first information correctly receives a wireless signal on the first air interface resource, the first wireless signal is used to determine the first ID, the second information is used to determine the second ID, and the first ID and the second ID are integers respectively.

6. The method in the UE of any one of claims 1 to 5, wherein the first information indicates that a sender of the first information fails to correctly receive a wireless signal on the first air interface resource, the first wireless signal being determined as not correctly received; the first information indicates not to receive the second information; or the first information indicates reception of the second information, the second information being used to determine scheduling information for the second wireless signal.

7. The method in the user equipment according to any of claims 2 to 5, wherein said step A comprises:

a1, sending a second wireless signal;

wherein the second information is used to determine scheduling information for the second wireless signal; the second information is transmitted on a physical layer data channel; the timing adjustment is used to ensure that the user equipment maintains uplink synchronization with a sender of the first information while transmitting the second wireless signal; the RU occupied by the second wireless signal does not belong to the RU occupied by the first resource pool.

8. The method in the UE of any of claims 1 to 7, wherein the first information includes Q1 sub information, and the Q1 sub information is respectively used to determine whether there are correctly received wireless signals on Q1 air interface resources; the first air interface resource is one of the Q1 air interface resources; q1 is a positive integer greater than 1; the Q1 pieces of sub information include a first sub information, and the first sub information is associated with the first air interface resource.

9. The method in a user equipment according to any of claims 1-8, wherein said second information is one of Q2 candidate information; the first information is used to determine the Q2; q2 is a positive integer.

10. The method in the ue of claim 8, wherein the second information is one of Q2 candidate information; the first information is used to determine the Q2; q2 is a positive integer; the sub information consists of 2 information bits, and four states corresponding to the 2 information bits are respectively a first state, a second state, a third state and a fourth state; the first state indicates that a sender of the first information correctly receives wireless signals on the corresponding air interface resource; the Q2 is equal to a number of sub information for which a corresponding state of the Q1 sub information belongs to a set of candidate states, the set of candidate states including at least two of a first state, a second state, a third state, and a fourth state.

11. A method used in a base station that is exempt from grant, comprising the steps of:

-step a. receiving a first wireless signal;

-step b. sending the first information;

wherein the first information is used to determine whether the first wireless signal was received correctly; the first information is used to determine whether to receive second information; the first wireless signal occupies a first air interface resource, and one air interface resource comprises at least the former of a time frequency resource and a multiple access signature; the second information is used to determine whether the first wireless signal was correctly received and scheduling information for a second wireless signal; the scheduling information comprises occupied time-frequency resources and timing adjustment; one of the time-frequency resources includes a positive integer number of resource units RU, and the resource units occupy one subcarrier in a frequency domain and occupy a duration of one multicarrier symbol in a time domain.

12. The method in a base station according to claim 11, wherein said step a comprises:

step A0. sending a first signaling;

wherein the first signaling is used to determine a first resource pool in which the base station blindly detects the first wireless signal; the first resource pool comprises a positive integer of the air interface resources.

13. The method in a base station according to claim 12, wherein each of the time-frequency resources in the first resource pool belongs to Q air interface resources, each of the Q air interface resources includes Q multiple access signatures, Q is a positive integer greater than 1, and the Q multiple access signatures are configured by the first signaling.

14. The method in a base station according to claim 13, wherein said step B further comprises:

step B1, sending the second information;

15. The method in a base station according to claim 14, characterized in that if the first ID is equal to the second ID, the first radio signal is determined to be correctly received; otherwise the first wireless signal is determined to have not been correctly received; wherein the first information indicates that a sender of the first information correctly receives a wireless signal on the first air interface resource, the first wireless signal is used to determine the first ID, the second information is used to determine the second ID, and the first ID and the second ID are integers respectively.

16. The method in a base station according to any of claims 11 to 15, wherein the first information indicates that a sender of the first information failed to correctly receive a wireless signal on the first air interface resource, the first wireless signal being determined as not correctly received; the first information indicates not to receive the second information; or the first information indicates reception of the second information, the second information being used to determine scheduling information for the second wireless signal.

17. Method in a base station according to any of claims 12 to 15, characterized in that said step a comprises:

a1, receiving a second wireless signal;

wherein the second information is used to determine scheduling information for the second wireless signal; the second information is transmitted on a physical layer data channel; the timing adjustment is used to ensure that the user equipment maintains uplink synchronization with the sender of the first information while transmitting the second wireless signal; the RU occupied by the second wireless signal does not belong to the RU occupied by the first resource pool.

18. The method in the base station according to any of claims 11 to 17, wherein the first information includes Q1 sub information, and the Q1 sub information is respectively used to determine whether there are correctly received wireless signals on Q1 air interface resources; the first air interface resource is one of the Q1 air interface resources; q1 is a positive integer greater than 1; the Q1 pieces of sub information include a first sub information, and the first sub information is associated with the first air interface resource.

19. The method in a base station according to any of claims 11 to 15, characterized in that said second information is one of Q2 candidate information; the first information is used to determine the Q2; q2 is a positive integer.

20. The method in a base station according to claim 18, wherein said second information is one of Q2 candidate information; the first information is used to determine the Q2; q2 is a positive integer; the sub information consists of 2 information bits, and four states corresponding to the 2 information bits are respectively a first state, a second state, a third state and a fourth state; the first state indicates that a sender of the first information correctly receives wireless signals on the corresponding air interface resource; the Q2 is equal to a number of sub information for which a corresponding state of the Q1 sub information belongs to a set of candidate states, the set of candidate states including at least two of a first state, a second state, a third state, and a fourth state.

21. A user equipment configured for grantless provisioning, comprising:

-a first processing module: for transmitting a first wireless signal;

-a first receiving module: for receiving first information;

wherein the first information is used to determine whether the first wireless signal was received correctly; the first information is used to determine whether to receive second information; the first wireless signal occupies a first air interface resource, which is selected by the user equipment; one of the air interface resources comprises at least the former of a time frequency resource and a multiple access signature; the second information is used to determine whether the first wireless signal was correctly received and scheduling information for a second wireless signal; the scheduling information comprises occupied time-frequency resources and timing adjustment; the sender of the second wireless signal is the sender of the first wireless signal; one of the time-frequency resources includes a positive integer number of resource units RU, and the resource units occupy one subcarrier in a frequency domain and occupy a duration of one multicarrier symbol in a time domain.

22. The UE of claim 21, wherein the first processing module receives a first signaling;

23. The ue according to claim 22, wherein each of the time-frequency resources in the first resource pool belongs to Q air interface resources, each of the Q air interface resources includes Q multiple access signatures, Q is a positive integer greater than 1, and the Q multiple access signatures are configured by the first signaling.

24. The UE of claim 23, wherein the first receiving module receives the second information;

25. The UE of claim 24, wherein the first wireless signal is determined to be correctly received if the first ID is equal to the second ID; otherwise the first wireless signal is determined to have not been correctly received; wherein the first information indicates that a sender of the first information correctly receives a wireless signal on the first air interface resource, the first wireless signal is used to determine the first ID, the second information is used to determine the second ID, and the first ID and the second ID are integers respectively.

26. The UE of any one of claims 21 to 25, wherein the first information indicates that a sender of the first information fails to correctly receive a wireless signal on the first air interface resource, the first wireless signal being determined to have not been correctly received; the first information indicates not to receive the second information; or the first information indicates reception of the second information, the second information being used to determine scheduling information for the second wireless signal.

27. The user equipment according to any of claims 22-25, wherein the first processing module transmits a second wireless signal;

28. The UE of any one of claims 21 to 27, wherein the first information comprises Q1 sub information, and the Q1 sub information is respectively used to determine whether there are correctly received wireless signals on Q1 air interface resources; the first air interface resource is one of the Q1 air interface resources; q1 is a positive integer greater than 1; the Q1 pieces of sub information include a first sub information, and the first sub information is associated with the first air interface resource.

29. The ue according to any of claims 21-28, wherein the second information is one of Q2 candidate information; the first information is used to determine the Q2; q2 is a positive integer.

30. The ue of claim 28, wherein the second information is one of Q2 candidate information; the first information is used to determine the Q2; q2 is a positive integer; the sub information consists of 2 information bits, and four states corresponding to the 2 information bits are respectively a first state, a second state, a third state and a fourth state; the first state indicates that a sender of the first information correctly receives wireless signals on the corresponding air interface resource; the Q2 is equal to a number of sub information for which a corresponding state of the Q1 sub information belongs to a set of candidate states, the set of candidate states including at least two of a first state, a second state, a third state, and a fourth state.

31. A base station device used for grant-free, comprising:

-a second processing module: for receiving a first wireless signal;

-a first sending module: for transmitting first information;

32. The base station device of claim 31, wherein the second processing module sends a first signaling;

33. The base station device of claim 32, wherein each of the time-frequency resources in the first resource pool belongs to Q air interface resources, each of the Q air interface resources includes Q multiple access signatures, Q is a positive integer greater than 1, and the Q multiple access signatures are configured by the first signaling.

34. The base station device of claim 33, wherein the first sending module sends the second information;

35. The base station apparatus of claim 34, wherein the first wireless signal is determined to be correctly received if the first ID is equal to the second ID; otherwise the first wireless signal is determined to have not been correctly received; wherein the first information indicates that a sender of the first information correctly receives a wireless signal on the first air interface resource, the first wireless signal is used to determine the first ID, the second information is used to determine the second ID, and the first ID and the second ID are integers respectively.

36. The base station device according to any of claims 31 to 35, wherein the first information indicates that a sender of the first information fails to correctly receive a wireless signal on the first air interface resource, the first wireless signal being determined as not correctly received; the first information indicates not to receive the second information; or the first information indicates reception of the second information, the second information being used to determine scheduling information for the second wireless signal.

37. The base station device of any of claims 32 to 35, wherein the second processing module receives a second wireless signal;

38. The base station apparatus of any one of claims 31 to 37, wherein the first information comprises Q1 sub information, and the Q1 sub information is respectively used to determine whether there are correctly received wireless signals on Q1 air interface resources; the first air interface resource is one of the Q1 air interface resources; q1 is a positive integer greater than 1; the Q1 pieces of sub information include a first sub information, and the first sub information is associated with the first air interface resource.

39. The base station apparatus according to any of claims 31 to 38, wherein said second information is one of Q2 candidate information; the first information is used to determine the Q2; q2 is a positive integer.

40. The base station apparatus of claim 38, wherein the second information is one of Q2 candidate information; the first information is used to determine the Q2; q2 is a positive integer; the sub information consists of 2 information bits, and four states corresponding to the 2 information bits are respectively a first state, a second state, a third state and a fourth state; the first state indicates that a sender of the first information correctly receives wireless signals on the corresponding air interface resource; the Q2 is equal to a number of sub information for which a corresponding state of the Q1 sub information belongs to a set of candidate states, the set of candidate states including at least two of a first state, a second state, a third state, and a fourth state.