CN111585717B

CN111585717B - Method and equipment used in grant-free UE and base station

Info

Publication number: CN111585717B
Application number: CN202010342085.7A
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: 2024-07-23
Anticipated expiration: 2036-09-24
Also published as: CN111585718A; CN107872299A; CN111585717A; CN111585718B; CN107872299B

Abstract

The invention discloses a method and equipment used in a grant-free UE and a base station, wherein the UE transmits 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 to determine 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 selected by the UE. One of the air interface resources includes at least the former of { one time-frequency resource, one multiple access signature }. According to the invention, by designing the first information and the second information, the resources for downlink feedback of uplink transmission under the grant-free condition are flexibly configured, so that the resource waste caused by reserving excessive resources for downlink feedback when the number of the UE is large is avoided, and the system spectrum efficiency is further improved.

Description

Method and equipment used in grant-free UE and base station

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

filing date of the original application: 2016.09.24

Number of the original application: 201610849058.2

-The name of the invention of the original application: method and equipment used in grant-free UE and base station

Technical Field

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

Background

In a conventional wireless communication system based on a digital modulation scheme, for example, a 3GPP (3 rd Generation Partner Project, third generation partnership project) cellular system, uplink wireless signal transmission is based on scheduling by a base station. In accordance with the conclusion of the 3gpp RAN1 (Radio Access Network ) #84bis conference, to reduce the overhead of the system scheduling signaling, the next-generation wireless communication system will study the application of the Autonomous (Autonomous)/grant-free (GRANT FREE)/contention-based (Contentioned Based) non-orthogonal multiple access method in various NR (New Radio) application scenarios. For at least uplink mMTC (MASSIVE MACHINE-Type Communications, large-scale machine type communication), autonomous/grant-free/contention-based non-orthogonal multiple access needs to be studied.

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

Disclosure of Invention

The inventor found through research that under autonomous/grant-free/contention-based non-orthogonal multiple access, since the base station cannot predict which UE's uplink transmission is received correctly or erroneously on which time-frequency resources, HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgement ) of the uplink transmission cannot be fed back through PHICH (Physical Hybrid ARQ Indicator Channel, physical hybrid automatic repeat request indicator channel) as in the existing system. Meanwhile, considering the initial purpose of uplink transmission and Grant-free design of a plurality of UEs, implicitly indicating downlink HARQ-ACK for uplink transmission through NDI (New Data Indicator, new data indication) in UL Grant (uplink Grant) is also an inefficient scheme.

In order to solve the above problem, a simple manner is that the base station reserves a time-frequency resource for transmitting downlink feedback for each air interface resource with grant-free transmission, and the time-frequency resource needs to be embedded with an ID (Identity) of a transmitting UE corresponding to data received in the air interface resource, so that a receiving UE can determine whether feedback on the time-frequency resource is for itself, but not for data transmission of other UEs. However, the grant-free transmission scenarios discussed by the NR at present are all based on the situation that the number of users is large, and when the number of users actually transmitted changes in real time, the method needs to reserve the resources fed back by the rows according to the number of users transmitted at the same time to the maximum, which can bring about huge waste of resources and reduce the spectrum efficiency.

The present application provides a solution to the above problems. It should be noted that the embodiments of the present application and the features in the embodiments may be arbitrarily combined with each other without collision. For example, embodiments in the UE of the present application and features in the embodiments may be applied in the 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. Receiving 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 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 selected by the UE. One of the air interface resources includes at least the former of { one time-frequency resource, one multiple access signature }.

As an embodiment, the above method has the advantage that the partial information in the first information indicates whether the uplink data is correctly received on the air interface resource, 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 smaller, the number of the second information is smaller, so that the resources occupied by the downlink feedback can be reduced, and the spectrum efficiency is improved.

As an embodiment, the first information is dynamically configured.

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

As one 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), power dimension (Power-dimension) }.

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

Specifically, according to one 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 number of the air interface resources.

As an embodiment, the first signaling is higher layer signaling (HIGHER LAYER SIGNALING).

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

As an embodiment, the UE selects the first air interface 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, and the Q air-interface resources respectively include Q multiple access signatures, where Q is a positive integer greater than 1.

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

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

As an embodiment, one of the time-frequency resources includes a positive integer number of RU (Resource Unit), which occupies one subcarrier in the frequency domain and occupies one duration of a multicarrier symbol in the time domain.

As a sub-embodiment of this embodiment, the duration of the one multi-carrier symbol is equal to the inverse of the subcarrier spacing corresponding to the RU, the unit of the duration of the one multi-carrier symbol is seconds, and the unit of the subcarrier spacing corresponding to 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 Multiple Access, single carrier frequency division multiplexing access) symbol, FBMC (Filter Bank Multi Carrier, filter bank multi-carrier) symbol, OFDM symbol containing CP, DFT-s-OFDM (Discrete Fourier Transform Spreading Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing) symbol containing CP }.

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

As an embodiment, the first resource pool comprises a plurality of time units in the time domain.

As a sub-embodiment of this embodiment, the time unit is the 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 an embodiment, the first resource pool comprises a plurality of frequency units in the frequency domain.

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

As a sub-embodiment of this embodiment, the frequency unit is the 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 one aspect of the present invention, the method is characterized in that the step B further includes the steps of:

Step b1. Receive the second information.

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

As an embodiment, the above method has the advantage that the base station can choose to increase the transmission accuracy of the second wireless signal by performing the transmission based on the base station scheduling on the second wireless signal, so as to directly increase the retransmission efficiency through the transmission based on the scheduling when the grant-free air interface resource is more crowded.

As an embodiment, the second information is transmitted on a physical layer control channel.

As an 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 the sender of the first information when transmitting the second wireless signal.

In particular, according to one aspect of the 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 not be received correctly. 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 embodiment, the above method has the following advantages: because one air interface resource may be selected by multiple UEs, and the multiple UEs do not know that collision occurs between them, by designing the first ID and the second ID, it is ensured that the UEs can explicitly know whether the first information is own downlink feedback.

As an embodiment, the UE default determination receives the second information, 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 being equal to the second ID, the X being a positive integer greater than 1.

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

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

In particular, according to one aspect of the present invention, the above method is characterized in that the first information indicates that the 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 not correctly received. The first information indicates that the second information is not received; or the first information indicates that the second information is received, the second information being used to determine scheduling information for the second wireless signal.

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

As one embodiment, when the first information indicates to receive the second information, the UE transmits the second wireless signal according to the second information, where 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 that the correct reception of the second radio signal by the base station is ensured by the scheduled transmission.

Step a1. Transmitting a second wireless signal.

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

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

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

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

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

As a sub-embodiment of this embodiment, the first radio signal and the second radio signal are output after the first bit block is sequentially subjected to 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 one embodiment, the first wireless signal and the second wireless signal correspond to different RVs (Redundancy Version, 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.

As one embodiment, the first air interface resource comprises a given set of multiple access signatures, the multiple access signatures in the given set of multiple access signatures not being 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.

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

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

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

As one 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 air interface resource #i in the Q1 air interface resources. The sub information #i is (i+1) th sub information of the Q1 sub information, the air interface resource #i is (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 in a { code-domain first, frequency-domain second, time-domain third } manner.

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

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

As an embodiment, the sub-information consists of 1 information bit, the 1 information bit indicating whether the 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 the 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 the sender of the first information fails to correctly receive wireless signals 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 the sender of the first information fails to correctly receive wireless signals on the corresponding air interface resource and needs to receive the second information (i.e. 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, 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 benefits of the four state design described above are: a first state for 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 state is used to indicate that the first radio signal of the UE was detected on the first air interface resource but was not received correctly. The third state is designed, so that the base station can receive the second wireless signal subsequently and combine the second wireless signal with the first wireless signal to realize combination gain, thereby improving 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 location of the second information in the Q2 candidate information }. The Q2 is a positive integer.

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

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

As an embodiment, the sub-information consists of 1 information bit, the 1 information bit indicating whether the 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, the target sub-information indicating that there is a correctly received radio signal on the corresponding air interface resource.

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

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

As an subsidiary embodiment of this sub-embodiment, the meaning of said candidate information for different states in said set of candidate states is different.

As an embodiment, the Q2 candidate information forms a target information set, the second information belongs to the target information set, and the number of information bits contained in the target information set is 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 contained in the target information set is dynamically variable.

As a sub-embodiment of this embodiment, the number of information bits contained in the target information set is linear with Q2.

As an embodiment, the above embodiment and sub-implementation have the advantage that the size of the target information set is dynamically changed and related to the radio signal correctly received by the base station in the first resource pool, which further reduces the load of the control signaling and improves the spectral 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. transmitting 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 at least one of { whether to receive the second information, time-frequency resources occupied by the second information }. The first radio signal occupies a first air interface resource, and one of the air interface resources includes at least the former of { a time-frequency resource, 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 number of the air interface resources.

Step b1. Send the second information.

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

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

-step a1. Receiving a second wireless signal.

The invention discloses a user equipment used for grant-free, 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 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 number of the air interface resources.

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

In particular, according to one aspect of the invention, the above-mentioned device is characterized in that 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 not be received correctly. 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.

In particular, according to one aspect of the present invention, the above device is characterized in that the first information indicates that the 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 not correctly received. The first information indicates that the second information is not received; or the first information indicates that the second information is received, the second information being used to determine scheduling information for the second wireless signal.

In particular, according to one aspect of the present invention, the above device is characterized in that the first information includes Q1 sub-information, and the Q1 sub-information is used to determine whether there are correctly received radio signals on Q1 of the air interface resources, respectively. The first air interface resource is one of the Q1 air interface resources. The Q1 is a positive integer greater than 1. The Q1 sub-information includes first sub-information, where 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 candidate information. The first information is used to determine at least one of { the Q2, the location of the second information in the Q2 candidate information }. The Q2 is a positive integer.

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

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

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

As an embodiment, the second processing module is further configured to send the 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 number of the air interface resources.

As an 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 the second information. The second information is used to determine at least one of { whether the first wireless signal is correctly received, scheduling information of a second wireless signal }. The scheduling information includes at least one of { occupied time-frequency resources, occupied multiple access signature, MCS, 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:

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

By designing Q1 sub-information in the first information, the number of information bits occupied by the target information set is further determined, and the reduction of spectrum efficiency caused by the fact that the second information occupies excessive resources is avoided.

By designing the first resource pool, the complexity of blind detection of the first wireless signal by the base station is reduced while a plurality of air interface resources capable of transmitting the first wireless signal are provided for the UE.

Drawings

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

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

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

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

FIG. 4 shows a schematic diagram of a mapping of sub-information and candidate information according to one embodiment of the invention;

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

FIG. 6 illustrates a schematic diagram of resource mapping of air interface resources according to one embodiment of the invention;

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

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

Detailed Description

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

Example 1

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

For the base station N1, the first signaling is transmitted in step S10, the first wireless signal is received in step S11, the first information is transmitted in step S12, the second information is transmitted in step S13, and the second wireless signal is received in step S14.

For the UEU2, the first signaling is received in step S20, the first radio 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 radio signal is transmitted in step S24.

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

As a sub-embodiment, the transmission channel corresponding to the first radio signal is an UL-SCH (Uplink SHARED CHANNEL), uplink shared channel.

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

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

As an subsidiary embodiment of this sub-embodiment, said TRP is one TRP comprised by said base station N1.

Example 2

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

For UE U3, receiving first information in step S30; judging in step S31 whether the second information is received; if so, a second message is received in step S32, otherwise Go to (Go to) end (the end). Wherein the first information is used to determine whether to receive the second information. The first information includes Q1 sub-information, and the Q1 sub-information is used to determine whether there are correctly received radio signals on the Q1 air interface resources, respectively. The first air interface resource is one of the Q1 said air interface resources. The Q1 is a positive integer greater than 1. The Q1 sub-information includes first sub-information, where the first sub-information is associated with the first air interface resource.

As a sub-embodiment 1 of embodiment 2, the sub-information is composed of 1 information bit, the 1 information bit indicating whether the sender of the first information correctly receives a wireless signal on the corresponding air interface resource. If the first sub-information indicates that the wireless signal is correctly received on the first air interface resource, the UE determines to receive the second information in step S31; otherwise, the UE determines in step S31 that the second information is not received.

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 a candidate state set, the UE determines to receive second information in step S31; otherwise, the UE determines in step S31 that the second information is not received. The candidate state set includes at least two of { a first state, a second state, a third state, a fourth state }. The first state, the second state, the third state, and the fourth state are 00, 01, 10, 11, respectively.

Example 3

Embodiment 3 illustrates a flow chart of the UE determining whether to transmit the second radio signal, as shown in fig. 3.

For UE U4, receiving first information in step S40; judging in step S41 whether the second information is received; if yes, receiving a second message in step S42, otherwise going to (Go to) end (the end); judging in step S43 whether or not to transmit the second wireless signal; if so, a second wireless signal is sent in step S44, otherwise go to end. Wherein the first information is used to determine whether to receive the second information. The first information includes Q1 sub-information, and the Q1 sub-information is used to determine whether there are correctly received radio signals on the Q1 air interface resources, respectively. The first air interface resource is one of the Q1 said air interface resources. The Q1 is a positive integer greater than 1. The Q1 sub-information includes first sub-information, where 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 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 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 in step S43 that the second wireless signal is not transmitted. The first set of target states and the second set of target states each include at least one 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, 11, respectively.

As a sub-embodiment 2 of embodiment 3, the first sub-information indicates that the UE U4 correctly receives a radio 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 includes at least one of { occupied time-frequency resources, occupied multiple access signature, MCS, 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 received correctly; otherwise the first wireless signal is determined to not be received correctly. Wherein the first wireless signal is used to determine the first ID, the first ID and the second ID being integers, respectively.

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 sub-information, i.e. sub-information { #1, #2, …, # q1}, and the Q1 sub-information is used to determine whether there are correctly received radio signals on Q1 of the air interface resources, respectively. The first air interface resource is one of the Q1 air interface resources. The Q1 is a positive integer greater than 1. The Q1 sub-information comprises 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 is candidate information { #1, #2, …, # Q2}. The first information is used to determine the Q2.

In embodiment 4, Q2 pieces of sub-information in the Q1 pieces of sub-information are respectively in one-to-one correspondence with the Q2 pieces of candidate information, as indicated by arrows ar_1, ar_2, ar_q2.

As sub-embodiment 1 of embodiment 4, the Q2 candidate information is jointly encoded, i.e., the Q2 candidate information belongs to one Code Block (Code Block) of the channel encoder.

As a sub-embodiment 2 of embodiment 4, the Q2 candidate information is independently encoded, i.e., the UE can perform a decoding operation for only one of the candidate information.

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

As sub-embodiment 4 of embodiment 4, part of the candidate information in the Q2 candidate information includes a UE ID, and part of the candidate information in the Q2 candidate information includes configuration information of a radio signal.

Example 5

Embodiment 5 illustrates a schematic diagram of resource mapping of the first resource pool on the time-frequency domain in the present invention, as shown in fig. 5. In fig. 5, a rectangular grid with a number indicates a time-frequency resource, the time-frequency resources with different numbers are distributed continuously in a time-frequency domain, and the first resource pool contains P time-frequency resources, where P is a positive integer. The time-frequency resource occupies a positive integer number RU.

As a sub-embodiment, the number of RU occupied by one time-frequency resource is equal to the number of RU 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 this sub-embodiment, the first resource pool includes q×p of the 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, which is one of the time-frequency resources contained in the first resource pool.

Example 7

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

-A first processing module 101: for transmitting a first wireless signal;

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

In embodiment 7, the first information is used to determine whether the first wireless signal is received correctly. The first information is used to determine 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 selected by the UE. One of the air interface resources includes at least the former of { one time-frequency resource, one multiple access signature }.

As a sub-embodiment, the first processing module 101 is further configured to receive 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 number of the air interface resources.

As a sub-embodiment, the first processing module 101 is further configured to send 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 is correctly received, scheduling information of a second wireless signal }. The scheduling information includes at least one of { occupied time-frequency resources, occupied multiple access signature, MCS, timing adjustment }. The sender of the second wireless signal is the sender of the first wireless signal.

Example 8

Embodiment 8 illustrates a block diagram of the processing means in a base station apparatus, as shown in fig. 5. In fig. 8, the base station apparatus processing device 200 is mainly composed of a second processing module 201 and a second transmitting module 202.

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

-a first transmission 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 to determine at least one of { whether to receive the second information, time-frequency resources occupied by the second information }. The first radio signal occupies a first air interface resource, and one of the air interface resources includes at least the former of { a time-frequency resource, a multiple access signature }.

As a sub-embodiment, the second processing module 201 is further configured to send the 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 number 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 the second information. The second information is used to determine at least one of { whether the first wireless signal is correctly received, scheduling information of a second wireless signal }. The scheduling information includes at least one of { occupied time-frequency resources, occupied multiple access signature, MCS, timing adjustment }. The sender of the second wireless signal is the sender of the first wireless signal.

Those of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described methods may be implemented by a program that instructs associated hardware, and the program may be stored on 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 using one or more integrated circuits. Accordingly, each module unit in the above embodiment may be implemented in a hardware form or may be implemented in a software functional module form, and the present application is not limited to any specific combination of software and hardware. The UE and the terminal in the present application include, but are not limited to, wireless Communication devices such as mobile phones, tablet computers, notebooks, vehicle-mounted Communication devices, wireless sensors, network cards, internet of things terminals, RFID terminals, NB-IOT terminals, MTC (MACHINE TYPE Communication) terminals, eMTC (ENHANCED MTC ) terminals, data cards, network cards, vehicle-mounted Communication devices, low-cost mobile phones, low-cost tablet computers, and the like. The base station in the application comprises, 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 equipment.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

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

-step a. Transmitting a first wireless signal;

-step b. Receiving 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 the first air interface resource is selected by the user equipment; one of the air interface resources includes at least the former of one time-frequency resource and one multiple access signature; the second information is used to determine whether the first wireless signal is correctly received, 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 REs; and the RE occupied by the second wireless signal does not belong to the RE occupied by the first resource pool.

2. The method in a user equipment according to claim 1, wherein said step a comprises:

step A0. receives a 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 number of the air interface resources.

3. The method in a user equipment according to claim 2, wherein each of said time-frequency resources in said first pool of resources belongs to Q of said air-interface resources, said Q of said air-interface resources respectively comprising Q of said multiple-access signatures, said Q being a positive integer greater than 1, said Q of said multiple-access signatures being configured by said first signaling.

4. The method in a user equipment according to claim 1, wherein said 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, wherein the first wireless signal is determined to be received correctly if the first ID is equal to the second ID; otherwise the first wireless signal is determined to not be received correctly; 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 user equipment of claim 1, wherein the first information indicates that a sender of the first information failed to properly receive a wireless signal on the first air interface resource, the first wireless signal determined to not be properly received; the first information indicates that the second information is not received; or the first information indicates that the second information is received, the second information being used to determine scheduling information for the second wireless signal.

7. The method in the user equipment of claim 5, wherein the first information indicates that the sender of the first information failed to properly receive a wireless signal on the first air interface resource, the first wireless signal determined to not be properly received; the first information indicates that the second information is not received; or the first information indicates that the second information is received, the second information being used to determine scheduling information for the second wireless signal.

8. The method in a user equipment according to any of the claims 1 to 7, wherein step a comprises:

Step a1, transmitting 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 when transmitting the second wireless signal.

9. The method in a user equipment according to any of claims 1 to 7, wherein the first information comprises Q1 sub-information, the Q1 sub-information being used to determine whether there are correctly received radio signals on Q1 of the air interface resources, respectively; the first air interface resource is one of the Q1 air interface resources; the Q1 is a positive integer greater than 1; the Q1 sub-information includes first sub-information, where the first sub-information is associated with the first air interface resource.

10. The method in a user equipment according to any of claims 1 to 7, wherein the second information is one of Q2 candidate information; the first information is used to determine the Q2; the Q2 is a positive integer.

11. The method in a user equipment according to claim 9, wherein the second information is one of Q2 candidate information; the first information is used to determine the Q2; the Q2 is a positive integer.

12. The method in the ue according to claim 11, wherein the sub-information consists of 2 information bits, and 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 state indicates that a sender of the first information correctly receives wireless signals on the corresponding air interface resource; the Q2 is equal to the number of sub-information of which the corresponding state belongs to a candidate state set in the Q1 sub-information, and the candidate state set includes at least two of a first state, a second state, a third state and a fourth state.

13. A method for use in a grant-free base station, comprising the steps of:

-step a. Receiving a first wireless signal;

-step b. Transmitting 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 one of a time-frequency resource and a multiple access signature; the second information is used to determine whether the first wireless signal is correctly received, 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 REs; and the RE occupied by the second wireless signal does not belong to the RE occupied by the first resource pool.

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

-step A0. sends 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 number of the air interface resources.

15. The method in the base station of claim 14, wherein each of said time-frequency resources in said first pool of resources belongs to Q of said air-interface resources, said Q of said air-interface resources each comprising Q of said multiple-access signatures, said Q being a positive integer greater than 1, said Q of said multiple-access signatures being configured by said first signaling.

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

step b1, transmitting the second information;

17. The method in the base station according to claim 16, wherein the first wireless signal is determined to be received correctly if the first ID is equal to the second ID; otherwise the first wireless signal is determined to not be received correctly; 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.

18. The method in the base station of claim 13, wherein the first information indicates that the sender of the first information failed to properly receive a wireless signal on the first air interface resource, the first wireless signal determined to not be properly received; the first information indicates that the second information is not received; or the first information indicates that the second information is received, the second information being used to determine scheduling information for the second wireless signal.

19. The method in the base station of claim 17, wherein the first information indicates that the sender of the first information failed to properly receive a wireless signal on the first air interface resource, the first wireless signal determined to not be properly received; the first information indicates that the second information is not received; or the first information indicates that the second information is received, the second information being used to determine scheduling information for the second wireless signal.

20. A method in a base station according to any of the claims 13 to 19, characterized in that said step a comprises:

step 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 transmitter of the first wireless signal remains uplink synchronized with the transmitter of the first information when transmitting the second wireless signal.

21. The method in a base station according to any of the claims 13 to 19, characterized in that said first information comprises Q1 sub-information, said Q1 sub-information being used for determining whether there are correctly received radio signals on Q1 of said air interface resources, respectively; the first air interface resource is one of the Q1 air interface resources; the Q1 is a positive integer greater than 1; the Q1 sub-information includes first sub-information, where the first sub-information is associated with the first air interface resource.

22. A method in a base station according to any of claims 13 to 19, characterized in that said second information is one of Q2 candidate information; the first information is used to determine the Q2; the Q2 is a positive integer.

23. The method in the base station according to claim 21, wherein the second information is one of Q2 candidate information; the first information is used to determine the Q2; the Q2 is a positive integer.

24. The method according to claim 23, wherein the sub-information consists 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 state indicates that a sender of the first information correctly receives wireless signals on the corresponding air interface resource; the Q2 is equal to the number of sub-information of which the corresponding state belongs to a candidate state set in the Q1 sub-information, and the candidate state set includes at least two of a first state, a second state, a third state and a fourth state.

25. A user equipment for grant-free comprising the following modules:

-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, and the first air interface resource is selected by the user equipment; one of the air interface resources includes 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 is correctly received, 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 REs; and the RE occupied by the second wireless signal does not belong to the RE occupied by the first resource pool.

26. The user equipment of claim 25, wherein the first processing module receives first signaling;

27. The user equipment of claim 26, wherein each of the time-frequency resources in the first pool of resources belongs to Q of the air-interface resources, the Q of the air-interface resources each comprising Q of the multiple-access signatures, the Q being a positive integer greater than 1, the Q of the multiple-access signatures being configured by the first signaling.

28. The user equipment of claim 25, wherein the first receiving module receives the second information;

29. The user equipment of claim 28, wherein the first wireless signal is determined to be received correctly if the first ID is equal to the second ID; otherwise the first wireless signal is determined to not be received correctly; 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.

30. The user device of claim 25, wherein the first information indicates that the sender of the first information failed to properly receive a wireless signal on the first air interface resource, the first wireless signal determined to not be properly received; the first information indicates that the second information is not received; or the first information indicates that the second information is received, the second information being used to determine scheduling information for the second wireless signal.

31. The user device of claim 29, wherein the first information indicates that the sender of the first information failed to properly receive a wireless signal on the first air interface resource, the first wireless signal determined to not be properly received; the first information indicates that the second information is not received; or the first information indicates that the second information is received, the second information being used to determine scheduling information for the second wireless signal.

32. The user equipment according to any of claims 25 to 31, wherein the first processing module transmits a second wireless signal;

33. The user equipment according to any of claims 25 to 31, wherein the first information comprises Q1 sub-information, the Q1 sub-information being used to determine whether there are correctly received radio signals on Q1 of the air interface resources, respectively; the first air interface resource is one of the Q1 air interface resources; the Q1 is a positive integer greater than 1; the Q1 sub-information includes first sub-information, where the first sub-information is associated with the first air interface resource.

34. The user equipment according to any of claims 25 to 31, wherein the second information is one of Q2 candidate information; the first information is used to determine the Q2; the Q2 is a positive integer.

35. The user equipment of claim 33, wherein the second information is one of Q2 candidate information; the first information is used to determine the Q2; the Q2 is a positive integer.

36. The user equipment of claim 35, wherein the sub-information consists 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 state indicates that a sender of the first information correctly receives wireless signals on the corresponding air interface resource; the Q2 is equal to the number of sub-information of which the corresponding state belongs to a candidate state set in the Q1 sub-information, and the candidate state set includes at least two of a first state, a second state, a third state and a fourth state.

37. A base station apparatus for grant-free comprising the following modules:

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

-a first transmission module: for transmitting the first information;

38. The base station apparatus of claim 37, wherein the second processing module sends a first signaling;

39. The base station apparatus of claim 38, wherein each of the time-frequency resources in the first pool of resources belongs to Q of the air-interface resources, the Q of the air-interface resources each comprising Q of the multiple-access signatures, the Q being a positive integer greater than 1, the Q of the multiple-access signatures being configured by the first signaling.

40. The base station apparatus of claim 37, wherein the first transmitting module transmits the second information;

41. The base station apparatus of claim 40, wherein the first wireless signal is determined to be received correctly if the first ID is equal to the second ID; otherwise the first wireless signal is determined to not be received correctly; 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.

42. The base station apparatus of claim 37, wherein the first information indicates that a sender of the first information failed to properly receive a wireless signal on the first air interface resource, the first wireless signal determined to not be properly received; the first information indicates that the second information is not received; or the first information indicates that the second information is received, the second information being used to determine scheduling information for the second wireless signal.

43. The base station device of claim 41, wherein the first information indicates that the sender of the first information failed to properly receive a wireless signal on the first air interface resource, the first wireless signal determined to not be properly received; the first information indicates that the second information is not received; or the first information indicates that the second information is received, the second information being used to determine scheduling information for the second wireless signal.

44. The base station apparatus of any one of claims 37 to 41, wherein the second processing module receives a second wireless signal;

45. The base station apparatus according to any one of claims 37 to 41, wherein the first information includes Q1 sub-information, the Q1 sub-information being used to determine whether there are correctly received radio signals on Q1 of the air interface resources, respectively; the first air interface resource is one of the Q1 air interface resources; the Q1 is a positive integer greater than 1; the Q1 sub-information includes first sub-information, where the first sub-information is associated with the first air interface resource.

46. The base station apparatus according to any one of claims 37 to 41, wherein the second information is one of Q2 candidate information; the first information is used to determine the Q2; the Q2 is a positive integer.

47. The base station apparatus of claim 45, wherein the second information is one of Q2 candidate information; the first information is used to determine the Q2; the Q2 is a positive integer.

48. The base station apparatus of claim 47, wherein the sub-information consists of 2 information bits, and 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 state indicates that a sender of the first information correctly receives wireless signals on the corresponding air interface resource; the Q2 is equal to the number of sub-information of which the corresponding state belongs to a candidate state set in the Q1 sub-information, and the candidate state set includes at least two of a first state, a second state, a third state and a fourth state.