WO2019080555A1

WO2019080555A1 - Acknowledgement method and device for grant-free data transmission

Info

Publication number: WO2019080555A1
Application number: PCT/CN2018/095862
Authority: WO
Inventors: 杜振国; 韩云博; 丁志明
Original assignee: 华为技术有限公司
Priority date: 2017-10-24
Filing date: 2018-07-17
Publication date: 2019-05-02
Also published as: CN110121901B; CN110121901A

Abstract

Provided in the present application are an acknowledgement method and device for grant-free data transmission. The method comprises: a network device receives data transmitted by at least one terminal device employing a grant-free resource; the network device transmits an acknowledge message to the at least one terminal device on the basis of the state of which the data transmitted by the at least one terminal device, the acknowledge message comprising a first bitmap and compression indication information, where the first bitmap is used for indicating whether the data transmitted by the at least one terminal device is correctly received, and the compression indication information is used for indicating whether the first bitmap is a compressed bitmap. The method and device for data transmission of embodiments of the present application facilitate reduced overhead in an acknowledge message transmission process.

Description

Method and device for confirming unauthorized data transmission

This application claims the priority of the Chinese Patent Application filed on October 24, 2017, the Chinese Patent Office, the application number is 201710997523.1, and the application name is "a method for confirming data transmission, equipment and systems", the entire contents of which are incorporated by reference. In this application.

Technical field

The present application relates to the field of communications, and in particular, to a method and apparatus for confirming unauthorized data transmission in the field of communications.

Background technique

The fifth-generation mobile communication (5-generation, 5G) introduces a grant-free (transmission without grant, grant-less or grantless, GF) transmission method for new radio (NR) for uplink data. Transmission. The so-called GF transmission mode refers to a transmission resource pool (also referred to as a GF transmission resource pool, including at least one GF resource) that is pre-configured in the network device when the terminal device has data to be transmitted without requesting uplink transmission resources from the network device. Selecting at least one transmission unit for uplink transmission directly performs uplink transmission based on a certain rule. In this way, the signaling interaction in the grant-based or transmission with grant process can be omitted, thereby reducing signaling overhead and transmission delay, and is particularly suitable for packet transmission and delay sensitive services. After the terminal device sends the data in the configured GF resource, it is expected to receive a hybrid automatic repeat request (HARQ) acknowledgement message sent by the network device, that is, an acknowledgement (ACK) or a negative acknowledgement ( Non-acknowledge (NACK) indicates whether the network device correctly receives data of the terminal device.

For the HARQ acknowledgment of the GF transmission, in a current implementation, the network device sends a group common downlink control information (G-DCI) to the group of terminal devices, where the G-DCI carries the group terminal device. HARQ acknowledgment message for each terminal device. Specifically, the G-DCI includes a bitmap, and each terminal device corresponds to at least one bit in the Bitmap, indicating whether the data of the terminal device is correctly received by the network device, for example, 1 indicates correct reception, and 0 indicates Not received correctly. In addition, the network device also configures the group ID of the terminal device group for the terminal device to distinguish the G-DCI corresponding to different terminal device groups. When the terminal device sends the GF data and receives a G-DCI, it determines whether the G-DCI is a G-DCI corresponding to the terminal device group in its own group based on the group identifier therein, and if so, according to its own location index from the G-DCI. The corresponding location in the DCI's Bitmap gets a confirmation message.

Within the coverage of a network device, there may be many terminal devices that can be transmitted by the GF method. However, when the data of each of the multiple terminal devices arrives at the network device is uncertain, each time GF In the transmission, the number of terminal devices that actually transmit uplink data may not always be many, which may result in some bits of the Bitmap in the G-DCI carrying the HARQ acknowledgment message being wasted for one HARQ acknowledgment message.

Summary of the invention

The present application provides a method and apparatus for confirming the unauthorized data transmission, which is beneficial to save the overhead in the process of confirming the transmission of the message.

A first aspect provides a method for confirming an unlicensed data transmission, comprising: receiving, by a network device, data sent by at least one terminal device using an unlicensed resource; and receiving, by the network device, data according to the at least one terminal device Sending an acknowledgment message to the at least one terminal device, where the acknowledgment message includes a first bit table Bitmap and compression indication information, where the first Bitmap is used to indicate whether the data sent by the at least one terminal device is correctly received, The compression indication information is used to indicate whether the first Bitmap is a compressed Bitmap. If the first Bitmap is not a compressed Bitmap, each bit in the first Bitmap corresponds to at most one terminal device, if the first Bitmap To compress the Bitmap, one bit exists in the first Bitmap corresponding to multiple terminal devices, and/or a plurality of bits in the first Bitmap correspond to one terminal device.

Specifically, the network device may determine, according to an actual situation, whether to compress the first Bitmap included in the confirmation message for indicating whether the data is correctly received, and carry the compression indication information in the confirmation message, to indicate whether the first A Bitmap is compressed to indicate whether the first Bitmap is a traditional Bitmap or a compressed Bitmap. In a conventional Bitmap, each bit corresponds to at most one terminal device; in a compressed Bitmap, one bit corresponds to a plurality of terminal devices, and/or a plurality of bits exist to correspond to one terminal device. It should be understood that the terminal device herein generally refers to a terminal device that may use GF resources to transmit data within the coverage of the network device, and these terminal devices do not necessarily participate in the current data transmission.

After the network device sends the acknowledgement message, the third terminal device receives the acknowledgement message, and first determines, according to the compression indication information carried in the acknowledgement message, whether the first Bitmap included in the acknowledgement message is a traditional Bitmap or a compressed Bitmap, and then the first The Bitmap determines at least one bit corresponding to itself, and further determines whether the transmitted data is correctly received by the network device. In a specific implementation, the first Bitmap sent by the network device may include a sub-bitmap corresponding to the group of terminal devices, and the third terminal device may determine, according to the pre-configured group identifier, the sub-device group in the confirmation message. Bitmap, and according to the child Bitmap, determine whether its own data is correctly received by the network device. Optionally, the sub-bitmap may be included in the G-DCI, and a group of terminal devices correspond to one G-DCI, but the embodiment of the present application does not limit this.

In the data transmission method of the embodiment of the present application, the network device can reasonably select whether to compress the Bitmap in the acknowledgment message sent to the terminal device, and carry the compression indication information in the acknowledgment message to indicate the network device. Whether the Bitmap in the acknowledgment message is compressed, so that the terminal device can correctly parse the Bitmap in the acknowledgment message according to the compression indication information, thereby saving the overhead in the process of confirming the message transmission, thereby improving system performance.

It should be understood that the length of the compressed Bitmap and the length of the traditional Bitmap may be equal or not equal, which is not limited by the embodiment of the present application. In the case where the length of the compressed Bitmap is equal to the length of the conventional Bitmap, the number of blind detections in which the terminal device receives the confirmation message can be reduced, thereby improving the data transmission performance.

In conjunction with the first aspect, in some implementations of the first aspect, the compression indication information is a radio network temporary identifier RNTI or a group identifier of a terminal device group corresponding to the at least one terminal device.

In a possible implementation, the compression indication information may be an RNTI, and the RNTI may be referred to as a group RNTI (group RNTI, G-RNTI). The network device may explicitly carry the G-RNTI in the acknowledgment message, or may use the G-RNTI of the group of terminal devices to scramble the G-DCI of the group of terminal devices. This is not limited. The G-RNTI scrambling method does not lengthen the length of the acknowledgment message, and the transmission overhead is small.

In another possible implementation manner, the compression indication information may be specifically a group ID (G-ID) of the terminal device group corresponding to the at least one terminal device. The network device may explicitly carry the G-ID in the acknowledgment message to indicate whether the currently transmitted acknowledgment message includes a Bitmap as a legacy Bitmap or a compressed Bitmap. Since the group identifier G-ID is explicitly carried in the confirmation message, although the confirmation message is longer, it is more flexible and convenient for network device configuration.

In another possible implementation, the set of identifiers can be used to scramble G-DCI, ie, used as the G-RNTI described above. In this case, the above G-RNTI is G-DCI.

With reference to the first aspect, in some implementations of the first aspect, the first Bitmap is a compressed Bitmap, and before the network device sends an acknowledgement message to the at least one terminal device, the method further includes: The network device generates, according to the receiving condition of the data sent by the at least one terminal device, a first to-be-transmitted Bitmap based on the Bloom filter, where the Bloom filter is defined by the first hash function set, the first The hash function set includes K ₁ hash functions, and K ₁ is an integer greater than or equal to 1; the network device determines the first to-be-transmitted Bitmap as the first Bitmap.

Specifically, in a case where the network device determines to compress the Bitmap in the confirmation message, the network device may compress the Bitmap by using a Bloom Filter, and determine the compressed Bitmap as the first Bitmap.

It should be understood that the identity (ID) of the terminal device can be used as input to each hash function in the first hash function set. For example, there are a total of 48 terminal devices capable of transmitting data by using GF resources in the coverage of the network device, and the identifiers are respectively 1-48. The identifiers of the terminal devices may be predefined or configured by the network device for each terminal device by using signaling.

With reference to the first aspect, in some implementations of the first aspect, the first to-be-transmitted Bitmap carries the acknowledgement ACK information sent by the network device to the M first terminal devices in the at least one terminal device, the network device correctly receives the M data transmitted from a first terminal device, M being an integer greater than or equal to 1, Bitmap K in each of the first terminal device ₁ of the first hash to be sent The value of the bit corresponding to the value is the first value.

Specifically, the network device determines, in the confirmation message, which GF data of the terminal device is correctly received, that is, the first Bitmap carries the ACK information, and the network device may first determine the identifier (ID) of the M first terminal devices that are correctly received. Using the first hash function set as described above, the identifiers of the M first terminal devices are taken as inputs, and the hash value of each first terminal device is calculated, and the position corresponding to the K ₁ hash values in the first to-be-transmitted Bitmap is determined. Set to the first value, for example 1, to execute the stored procedure of the above Bloom Filter. The network device determines the first to-be-transmitted Bitmap as the first Bitmap, and sends the bitmap to the at least one terminal device. The third terminal device of the at least one terminal device performs the query process of the Bloom Filter according to its own K ₁ hash value, and determines whether the data sent by itself is correctly received by the network device.

Since the first Bitmap is generated on the basis of the first to-be-transmitted Bitmap, the length of the first to-be-transmitted Bitmap is equal to the length of the first Bitmap. In addition, in the first to-be-transmitted Bitmap, the values of all the bits are initially the original values, and the original values are not equal to the first value. In a possible implementation manner, the original values of each bit in the first to-be-transmitted Bitmap are all zero.

With reference to the first aspect, in some implementations of the first aspect, before the network device receives the data that the at least one terminal device uses the unlicensed resource, the method further includes: the network device according to the first a hash function set and an identifier including each terminal device in the at least one terminal device, calculating K ₁ hash values of each terminal device; the network device transmitting respective K to each of the terminal devices ₁ hash value.

Specifically, since the calculation of the hash value requires a certain computational overhead, in order to reduce the computational overhead of the terminal device and further save power, the network device may calculate the hash value of the terminal device based on the identifier ID of the terminal device, and directly calculate the result. The device is sent to the terminal device, that is, the network device directly instructs the terminal device to compress the position of the corresponding at least one bit in the Bitmap. In this case, the first hash function set may be standard pre-defined or implemented internally by the network device, and the terminal device does not need to know the specific form of the first hash function set.

It should be understood, the at least one terminal device may be pre-configured, the terminal device can be employed for transmitting data to the network device GF resources, the network device can calculate the K terminal of each of the at least one terminal apparatus ₁ in an initial stage Hash values are distributed to the at least one terminal device for subsequent direct use.

With reference to the first aspect, in some implementations of the first aspect, the determining, by the network device, the first to-be-transmitted Bitmap as the first Bitmap, includes: sending, by the network device, the at least one terminal device The receiving condition of the data and the first hash function set, determining whether the first to-be-transmitted Bitmap will cause a false positive; if the network device determines that the first to-be-sent Bitmap does not cause a false positive And the network device determines the first to-be-transmitted Bitmap as the first Bitmap.

In the embodiment of the present application, in order to prevent the third terminal device from being misjudged, after the network device generates the first to-be-transmitted Bitmap, the network device may first determine whether the first to-be-transmitted Bitmap will cause a false positive, that is, determine to use the compressed Bitmap for feedback. Whether it will lead to misjudgment, and if the misjudgment is not caused, the first to-be-transmitted Bitmap is determined to be the first Bitmap transmission. If the compression of the Bitmap will lead to misjudgment, the network device can choose to still use the traditional Bitmap as the first Bitmap to feedback to avoid misjudgment.

In conjunction with the first aspect, in some implementations of the first aspect, the network device determines, according to a reception condition of data sent by the at least one terminal device and the first hash function set, that the first to be sent Whether the Bitmap may cause a misjudgment, including: if the network device determines that the data sent by the N second terminal devices in the at least one terminal device is not correctly received, the network device according to the first hash function And determining, by the set and the identifier of each of the N second terminal devices, respectively, calculating K ₁ hash values of each second terminal device, where N is an integer greater than or equal to 1; the target device determines whether there is a second terminal of the N second terminal device, transmitted in the first Bitmap be, taken the position of the bit K of the target second terminal device _a hash value corresponding to The value is the first value; if the target second terminal device exists, the network device determines that the first to-be-transmitted Bitmap may cause a false positive; if the target second terminal device does not exist, the network The first device determines to be transmitted does not cause false Bitmap.

Specifically, after the network device generates the first to-be-transmitted Bitmap according to the ID of the at least one terminal device and the first hash function set, the network device may first perform the query process of the Bloom Filter for the N second terminal devices that are not correctly received. . If there is a target second terminal device (any one of the N second terminal devices), the bit value of the location corresponding to the target second terminal device is the first value, that is, the target second terminal can be queried. The ACK information of the device, then, the network device can determine that using a compressed Bitmap will lead to misjudgment.

The query process performed by the network device to determine whether a misjudgment has occurred is for the terminal device that sends the GF data and the GF data is not correctly received by the network device, that is, the N second terminal devices, the N second The terminal device is included in at least one terminal device, and N is greater than or equal to 1. It should be understood that if the N second terminal devices are not present, the network device may not need to perform a process of erroneously determining the query.

In order to avoid the occurrence of misjudgment, the network device can directly use the traditional Bitmap method for feedback, or can replace the first hash function set to determine a second hash function set that does not cause misjudgment, and adopt the second hash. The embodiment of the present application does not limit the generation of the compressed Bitmap and the feedback.

With reference to the first aspect, in some implementations of the first aspect, the network device sends an acknowledgement message to the at least one terminal device according to the receiving situation of the data sent by the at least one terminal device, including: the network The device sends the acknowledgement message to the at least one terminal device, the acknowledgement message includes function set indication information, and the function set indication information is used to indicate an identifier of the first hash function set.

With reference to the first aspect, in some implementations of the first aspect, the method, before the network device sends an acknowledgement message to the at least one terminal device according to the received condition of the data sent by the at least one terminal device The method further includes: in a case that the network device determines that the first to-be-transmitted Bitmap may cause a false positive, the network device determines a second hash function set, where the second hash function set includes K ₂ hashes a function, K ₂ is an integer greater than or equal to 1; the network device generates second to-be-sent information based on the second hash function set; and determining, by the network device, that the second to-be-sent information does not cause an error In the case of the network device, the network device determines the second to-be-sent information as the first Bitmap; and the network device sends the information to the at least one terminal device according to the reception status of the data sent by the at least one terminal device. Sending the acknowledgement message, the network device sends the acknowledgement message to the at least one terminal device, where the acknowledgement message includes function set indication information, and the function set refers to The indication information is used to indicate the identity of the second hash function set.

Specifically, in order to avoid the occurrence of misjudgment, multiple hash function sets may be defined in advance, and when the network device sends a first function set (ie, the first hash function set), a misjudgment may occur, and other hashes may be replaced. The function set is tried. When the network device finds a hash function set (ie, the second hash function set) that does not cause misjudgment in the defined plurality of hash function sets, the second hash function set is used to generate the compressed Bitmap, and at the same time The identifier (or index) of the second hash function set is indicated in the corresponding confirmation message, so that the terminal device performs the query by using the same hash function set.

In the embodiment of the present application, the network device may carry an index of the hash function set used to generate the compressed Bitmap based on the Bloom Filter in the confirmation message. Even if some hash function sets lead to misjudgment, since there are multiple hash function sets to choose from, it is still possible to find a hash function set that does not cause misjudgment, which greatly increases the use of compressed Bitmap. Confirm the opportunity for feedback to minimize the transmission overhead of the acknowledgment message.

With reference to the first aspect, in some implementations of the first aspect, in a case that the network device determines that the first to-be-transmitted Bitmap may cause a false positive, the compression indication information is used to indicate the first Bitmap Not a compressed Bitmap.

With reference to the first aspect, in some implementations of the first aspect, the first to-be-transmitted Bitmap carries negative acknowledgement NACK information sent by the network device to N second terminal devices in the at least one terminal device, the network device is not correctly receive the N data sent by the second terminal device, N being an integer greater than or equal to 1, Bitmap K in each of the second and the first terminal apparatus ₁ ha to be transmitted The bits of the position corresponding to the hash value are all the first values.

The second aspect provides another method for confirming the unauthorized data transmission, including: the third terminal device sends data to the network device by using an unlicensed resource; and the third terminal device receives the network device to send according to the at least one terminal device. The acknowledgement message sent by the receiving condition of the data, the at least one terminal device includes the third terminal device, the confirmation message includes a first bit table Bitmap and compression indication information, wherein the first Bitmap is used to indicate whether Correctly receiving data sent by the at least one terminal device, where the compression indication information is used to indicate whether the first Bitmap is a compressed Bitmap, and if the bit included in the first Bitmap is not a compressed Bitmap, the first Bitmap is Each bit of the bit corresponds to a terminal device. If the first Bitmap is a compressed Bitmap, one bit in the first Bitmap corresponds to multiple terminal devices, and/or a plurality of bits in the first Bitmap are corresponding to one. a terminal device; the third terminal device determines, according to the acknowledgement message, data sent by the third terminal device Whether the network device is correctly received.

With reference to the second aspect, in some implementations of the second aspect, the compression indication information is a radio network temporary identifier RNTI or a group identifier of a terminal device group corresponding to the at least one terminal device.

With reference to the second aspect, in some implementations of the second aspect, the first Bitmap carries acknowledgement ACK information sent by the network device to M first terminal devices in the at least one terminal device, The network device correctly receives the data sent by the M first terminal devices, where M is an integer greater than or equal to 1; the third terminal device determines, according to the first Bitmap, whether data sent by the third terminal device is correctly received by the network device, comprising: a third terminal device determines the first Bitmap, the K bit positions with the third terminal device hash value corresponding to _a value of a first value if both And K ₁ is an integer greater than or equal to 1; if the value of the bit corresponding to the K ₁ hash value of the third terminal device is the first value, the third terminal device determines the transmitting a third data terminal device is correctly received by the network device; bit position if the third terminal apparatus K _a value corresponding hash values are not the first value, the third The terminal device determines the Three terminal device transmits the data is not correctly received by the network device.

Binding a second aspect, certain implementations of the second aspect, in the first Bitmap determining the third terminal device, the K bit position of the third terminal device corresponding to _a hash value before a first value if both values, the method further comprising: the apparatus according to the third terminal identifier of the first set of hash function device, and the third terminal, the third terminal computing device K ₁ the hash value, the hash function of the first set of hash functions comprising K _1; K of the receiving network device transmitting the third terminal device or the terminal device ₁ of a third hash values.

With reference to the second aspect, in a certain implementation manner of the second aspect, the third terminal device receives an acknowledgement message that is sent by the network device according to the data received by the at least one terminal device, and includes: the third terminal Receiving, by the device, the acknowledgement message sent by the network device, where the acknowledgement message includes function set indication information, where the function set indication information is used to indicate an identifier of the first hash function set; and the third terminal device is configured according to The function set indication information determines the first hash function set.

With reference to the second aspect, in some implementations of the second aspect, the first Bitmap carries negative acknowledgement NACK information sent by the network device to N second terminal devices in the at least one terminal device, The network device does not correctly receive the data sent by the N second terminal devices, where N is an integer greater than or equal to 1; the third terminal device determines, according to the first Bitmap, whether the data sent by the third terminal device is is correctly received by the network device, comprising: a third terminal device determines the first Bitmap, the K bit positions with the third terminal device ₁ corresponding hash value whether the value of both the first value; K bit positions if the third terminal apparatus and _a corresponding hash values are the values of the first value, determining the third data terminal device transmits the third terminal device is not the network device receives the correct; K bit positions if the third terminal apparatus and _a corresponding hash value are not the values of the first value, the third terminal apparatus determines said third terminal Sent by the device According to the network device is correctly received.

In a third aspect, there is provided a data transmission apparatus for performing the method of the first aspect or any possible implementation of the first aspect. In particular, the apparatus comprises means for performing the method of any of the above-described first aspect or any of the possible implementations of the first aspect.

In a fourth aspect, there is provided another data transmission apparatus for performing the method of any of the second aspect or any of the possible implementations of the second aspect. In particular, the apparatus comprises means for performing the method of any of the possible implementations of the second aspect or the second aspect described above.

In a fifth aspect, another data transmission apparatus is provided, the apparatus comprising: a transceiver, a memory, and a processor. Wherein the transceiver, the memory and the processor are in communication with each other via an internal connection path for storing instructions for executing instructions stored in the memory to control the receiver to receive signals and to control the transmitter to transmit signals And when the processor executes the instructions stored by the memory, causing the processor to perform the method of the first aspect or any of the possible implementations of the first aspect.

In a sixth aspect, another data transmission apparatus is provided, the apparatus comprising: a transceiver, a memory, and a processor. Wherein the transceiver, the memory and the processor are in communication with each other via an internal connection path for storing instructions for executing instructions stored in the memory to control the receiver to receive signals and to control the transmitter to transmit signals And when the processor executes the instructions stored by the memory, causing the processor to perform the method of any of the possible implementations of the second aspect or the second aspect.

In a seventh aspect, a data transmission system is provided, the system comprising the apparatus in any one of the possible implementations of the third aspect or the third aspect, and the possible implementation in any one of the fourth aspect or the fourth aspect Device; or

The system comprises the apparatus of any of the possible implementations of the fifth or fifth aspect, and the apparatus of any of the sixth or sixth aspect of the possible implementation.

In an eighth aspect, a computer program product is provided, the computer program product comprising: computer program code, when the computer program code is executed by a computer, causing the computer to perform any of the first aspect or the first aspect described above Possible methods in the implementation.

According to a ninth aspect, a computer program product is provided, the computer program product comprising: computer program code, when the computer program code is executed by a computer, causing the computer to perform any of the second aspect or the second aspect Possible methods in the implementation.

A tenth aspect, a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of the first aspect or any of the possible implementations of the first aspect.

In an eleventh aspect, a computer readable medium is provided for storing a computer program comprising instructions for performing the method of any of the second aspect or any of the possible implementations of the second aspect.

A twelfth aspect provides an apparatus, including a storage module, a processing module, and a communication interface, wherein the storage module is configured to store an instruction, and the processing module is configured to execute an instruction stored by the storage module, so that the processing module executes the first aspect Or the method of any of the possible implementations of the first aspect. The device may be part of a network device, such as a chip in a network device.

In a thirteenth aspect, an apparatus is provided, including a storage module, a processing module, and a communication interface, wherein the storage module is configured to store an instruction, and the processing module is configured to execute an instruction stored by the storage module, so that the processing module performs the second aspect Or the method of any of the possible implementations of the second aspect. The device may be part of a terminal device, such as a chip in a terminal device.

In some embodiments provided by the foregoing aspects, the acknowledgement message sent by the network device to the at least one terminal device may be a group of common downlink control information G-DCI, and the sending may be “multicast” or “ Multicast" is sent in a way.

In some embodiments, the at least one terminal device belongs to at least two terminal device groups. In the prior art, when the at least one terminal device belongs to at least two terminal device groups, the network device needs to send at least two G-DCIs to the at least one terminal device (each terminal device group corresponds to one G-DCI) In this embodiment, multiple terminal device groups correspond to one G-DCI, which saves the overhead of messages.

The present application also provides the following embodiments (the numbers of the various embodiments provided in this section have no clear correspondence with the numbers of the embodiments of the other parts herein, only the convenience of the description in this part.):

A method of confirming data transmission, the method comprising:

The network device receives the GF data sent by the at least one terminal device;

The network device sends a HARQ acknowledgment message to the at least one terminal device, where the HARQ acknowledgment message includes a Bitmap, and the Bitmap is used to confirm the GF data sent by the at least one terminal device;

The HARQ acknowledgment message includes a compression indication, where the compression indication is used to indicate whether the Bitmap is a compressed Bitmap.

The base station carries a compression indication in the HARQ acknowledgment message sent for the GF transmission, so that the UE can determine how to parse the Bitmap in the HARQ acknowledgment message based on the indication, and thereby obtain the ACK/NACK information of the data transmission. When the Bitmap in the HARQ acknowledgment message is a compressed Bitmap, the transmission overhead of the HARQ acknowledgment message can be reduced.

2. The method according to embodiment 1, wherein when the compression indication indicates that the Bitmap is not a compressed Bitmap, each bit in the Bitmap corresponds to one UE.

When the compression indication indicates that the Bitmap in the HARQ acknowledgment message is not a compressed Bitmap, the Bitmap is a traditional Bitmap, and the UE parses the Bitmap according to the traditional Bitmap method, that is, the UE has a one-to-one correspondence with the bits in the Bitmap.

3. The method according to

embodiment

1 or 2, wherein when the compression indication indicates that the Bitmap is a compressed Bitmap, the compressed Bitmap is generated based on a Bloom Filter.

When the Bitmap in the HARQ acknowledgment message is a compressed Bitmap, the transmission overhead of the HARQ acknowledgment message can be reduced. A specific implementation of Bitmap compression is based on Bloom Filter compression.

4. The method of embodiment 3, the HARQ confirmation message comprises a hash function set index, the hash function set index being used to indicate a hash function set used when generating the compressed Bitmap based on a Bloom Filter.

In order to avoid the occurrence of a false positive, the base station may carry an index of the hash function set used by the BF-generated compressed Bitmap in the HARQ acknowledgement message. Even if some hash function sets lead to misjudgment, since there are multiple hash function sets to choose from, it is still possible to find a set of hash functions that will not cause false positives, which greatly increases the chance of HARQ confirmation using compressed Bitmap. Therefore, the transmission overhead of the HARQ acknowledgment message is reduced as much as possible.

5. The method of embodiment 4, the hash function set index and the compression are indicated as the same indication.

The Hash function set index and compression indication can be the same indication, thereby reducing the indication overhead.

6. The method according to any one of embodiments 3-5, when the network device determines that the Bloom Filter-based compressed Bitmap does not cause a false positive, the network device sets the compression indication as the Bitmap To compress the Bitmap.

When the base station determines that the compressed Bitmap does not cause a false positive, the compressed Bitmap can be used for HARQ confirmation. Otherwise, the traditional Bitmap should be used for HARQ confirmation to avoid false positives.

7. The method according to any one of embodiments 1-6, wherein the Bitmap carries ACK information or NACK information of the GF data sent by the at least one terminal device.

The MAP or NACK information carried in the Bitmap can be data. Choosing the appropriate ACK/NACK BF for HARQ acknowledgment in different situations can achieve better transmission overhead savings.

8. The method of any of embodiments 1-7, the compression indication being a G-RNTI, the G-RNTI being used to scramble the HARQ acknowledgement message.

The compression indication can be a G-RNTI. Since the G-RNTI is carried in the HARQ acknowledgment message in a scrambling manner, the HARQ acknowledgment message is not lengthened, so the transmission overhead is small.

9. The method of embodiment 8, the network device configuring the G-RNTI to each of the at least one terminal device before the network device receives the GF data sent by the at least one terminal device .

The G-RNTI is used for the compression indication. Each UE should have at least two G-RNTIs (corresponding to the compressed Bitmap and the traditional Bitmap respectively). The base station should configure these G-RNTIs to the UE in advance.

10. The method of any of embodiments 1-7, wherein the compression indication is a group identification, and the HARQ confirmation message includes the group identification.

The compression indication can be a group identification. Since the group identity is explicitly carried in the HARQ acknowledgment message, although the HARQ acknowledgment message is longer, it is more flexible.

11. The method according to embodiment 10, before the network device receives the GF data sent by the at least one terminal device, the network device configuring the group identifier to each of the at least one terminal device.

The grouping identifier is used for the compression indication. Each UE should have at least two group identifiers (corresponding to the compressed Bitmap and the traditional Bitmap respectively). The base station should configure the group identifiers to the UE in advance.

12. A method of confirming data transmission, the method comprising:

The terminal device sends the GF data to the network device;

Receiving, by the terminal device, a HARQ acknowledgment message sent by the network device, where the HARQ acknowledgment message includes a Bitmap, where the Bitmap is used to confirm the GF data sent by the at least one terminal device, where the at least one terminal device includes Terminal device

13. The method according to embodiment 12, wherein each bit in the Bitmap corresponds to one UE when the compression indication indicates that the Bitmap is not a compressed Bitmap.

14. The method according to embodiment 12 or 13, wherein when the compression indication indicates that the Bitmap is a compressed Bitmap, the compressed Bitmap is generated based on a Bloom Filter.

When the Bitmap in the HARQ acknowledgment message is a compressed Bitmap, the transmission overhead of the HARQ acknowledgment message can be reduced.

A specific implementation of Bitmap compression is based on Bloom Filter compression.

15. The method of embodiment 14, the HARQ acknowledgement message comprising a hash function set index, the hash function set index being used to indicate a hash function set employed when generating the compressed bitmap based on a Bloom Filter.

16. The method of embodiment 15, the hash function set index and the compression are indicated as the same indication.

The method of any one of embodiments 12-16, wherein the Bitmap carries ACK information or NACK information of the GF data sent by the terminal device.

The method of any one of embodiments 12-17, wherein the compression indication is a G-RNTI, the G-RNTI being used to scramble the HARQ acknowledgement message.

19. The method of embodiment 18, before the terminal device sends the GF data to the network device, the terminal device receives the G-RNTI configured by the network device.

The method of any one of embodiments 12-17, wherein the compression indication is a group identification, and the HARQ confirmation message includes the group identification.

The method of embodiment 20, before the terminal device sends the GF data to the network device, the terminal device receives the group identifier configured by the network device.

22. A network device, the network device comprising:

Processor, memory and transceiver;

The transceiver is configured to receive and send data;

The memory is configured to store an instruction;

The processor is configured to execute the instructions in the memory, and perform the method as described in any of Embodiments 1-11.

23. The network device of embodiment 22, the transceiver comprising:

Transmitter and receiver;

The receiver is configured to receive the GF data, as described in any one of Embodiments 1-11, sent by the terminal device;

The transmitter is configured to transmit the HARQ acknowledgment message as described in any of Embodiments 1-11.

24. A terminal device, the terminal device comprising:

Processor, memory and transceiver;

The transceiver is configured to receive and send data;

The memory is for storing instructions;

The processor is operative to execute the instructions in the memory, performing the method of any of embodiments 12-21.

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

Transmitter and receiver;

The receiver is configured to receive a HARQ acknowledgement message, as described in any one of Embodiments 12-21, sent by the network device;

The transmitter is configured to transmit the GF data as described in any of embodiments 12-21.

26. A computer program product comprising a computer program which, when executed on a computer unit, causes the computer unit to implement the method of any of embodiments 1-11.

27. A computer program product comprising a computer program which, when executed on a computer unit, causes the computer unit to implement the method of any of embodiments 12-21.

28. A computer program that, when executed on a computer unit, causes the computer unit to implement the method of any of embodiments 1-11.

29. A computer program that, when executed on a computer unit, causes the computer unit to implement the method of any of embodiments 12-21.

30. A network device configured to perform the method of any of embodiments 1-11.

31. A terminal device configured to perform the method of any of embodiments 12-21.

32. A computer readable storage medium having stored thereon a computer program that, when executed on a computer, causes the computer to implement the method of any of embodiments 1-11.

33. A computer readable storage medium having stored thereon a computer program that, when executed on a computer, causes the computer to implement the method of any of embodiments 12-21.

34. A communication system comprising the terminal device of any of embodiments 1-11 and the network device of any of embodiments 12-21.

35. A chip comprising: a processing module and a communication interface, the processing module for performing the communication method of any of embodiments 1-11.

The chip of embodiment 35, the chip further comprising a storage module, the storage module is configured to store an instruction, the processing module is configured to execute an instruction stored by the storage module, and is in the storage module Execution of the stored instructions causes the processing module to perform the communication method of any of embodiments 1-11.

37. A chip comprising: a processing module and a communication interface, the processing module for performing the communication method of any of embodiments 12-21.

The chip of embodiment 37, the chip further comprising a storage module, the storage module is configured to store an instruction, the processing module is configured to execute an instruction stored by the storage module, and is in the storage module Execution of the stored instructions causes the processing module to perform the communication method of any of embodiments 12-21.

DRAWINGS

FIG. 1 shows a schematic diagram of a communication system of an embodiment of the present application.

FIG. 2 is a schematic diagram showing a correspondence relationship between a terminal device and a GF resource according to an embodiment of the present application.

FIG. 3a shows a schematic flow chart of a data transmission method according to an embodiment of the present application.

FIG. 3b shows a schematic diagram of a data transmission method in accordance with an embodiment of the present application.

4 shows a schematic diagram of a Bloom filter-based compressed Bitmap in accordance with an embodiment of the present application.

FIG. 5 shows a schematic diagram of another Bloom filter-based compressed Bitmap in accordance with an embodiment of the present application.

FIG. 6 shows a schematic diagram of another Bloom filter-based compressed Bitmap in accordance with an embodiment of the present application.

FIG. 7 shows a schematic block diagram for a data transmission device in accordance with an embodiment of the present application.

FIG. 8 shows a schematic block diagram of another data transmission device in accordance with an embodiment of the present application.

FIG. 9 shows a schematic block diagram of another data transmission device in accordance with an embodiment of the present application.

FIG. 10 shows a schematic block diagram of another data transmission device in accordance with an embodiment of the present application.

Detailed ways

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

It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, and a wideband code. Wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) System, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, and future 5G communication system Wait.

FIG. 1 shows a communication system 100 to which an embodiment of the present application is applied. The communication system 100 can include at least one network device 110. Network device 100 may be a device that communicates with a terminal device, such as a base station or base station controller or the like. Each network device 100 can provide communication coverage for a particular geographic area and can communicate with terminal devices (e.g., UEs) located within the coverage area (cell). The network device 100 may be a base transceiver station (BTS) in a GSM system or a code division multiple access (CDMA) system, or a base station (nodeB, NB) in a WCDMA system, or may be An evolved base station (evolutional node B, eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (CRAN), or the network device may be a relay station, an access point, In-vehicle device, wearable device, network-side device in a future 5G network, or a network device in a public land mobile network (PLMN) that is evolving in the future.

The wireless communication system 100 also includes a plurality of terminal devices 120 located within the coverage of the network device 110. The terminal device 120 can be mobile or fixed. The terminal device 120 may refer to an access terminal, a user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, and a user. Agent or user device. The access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication. Functional handheld device, computing device or other processing device connected to a wireless modem, in-vehicle device, wearable device, terminal device in a future 5G network or terminal in a future public land mobile network (PLMN) Equipment, etc.

FIG. 1 exemplarily shows one network device and two terminal devices. Alternatively, the communication system 100 may include multiple network devices and may include other numbers of terminal devices within the coverage of each network device. The embodiment does not limit this.

Optionally, the wireless communication system 100 may further include other network entities, such as a network controller, a mobility management entity, and the like. The embodiment of the present application is not limited thereto.

For ease of understanding, the following is an introduction to the license-free (GF) transmission involved in the embodiment of the present application.

In a traditional cellular communication system (for example, an LTE system), an uplink (UL) transmission adopts a grant-based or transmission with grant, that is, a network device schedules a terminal device to perform UL transmission resources and related transmission parameters. For example, the time domain, the frequency domain, the spatial domain resource, and the modulation and coding scheme (MCS) used for UL transmission. In this case, when a terminal device has uplink data to be sent, a scheduling request is first sent to the network device, and the network device sends a scheduling grant based on the scheduling request, and then the terminal device can allocate resources according to the resource allocation and the transmission parameter indicated in the scheduling authorization. Perform UL transmission. If the terminal device itself is in the RRC idle state (RRC_IDLE) state, the terminal device needs to perform random access (interaction process including four messages) before data can be transmitted. In any case, the grant-based UL transmission process described above requires more signaling overhead, and these signaling interactions inevitably introduce delays.

In the fifth generation (5th generation, 5G) of cellular communication, the scenarios considered include massive machine type communication (mMTC) and ultra-reliable and low latency communications (URLLC). ). The data generated by the mMTC service is usually small data (that is, each data packet is relatively small). If the traditional grant-based UL transmission method is adopted, the data transmission occupies much less resources than the signaling interaction before the data transmission (for example, The resources used by the signaling interaction of the scheduling request and the scheduling authorization process, or the signaling interaction of the random access procedure, result in low resource utilization. Especially in the case of a large number of mMTC devices, system resources will be largely occupied by interactive signaling. The URLLC service requires low latency, and the signaling interaction in the grant-based UL transmission process has a large delay due to radio resource control (RRC) signaling. Therefore, the traditional grant-based The UL transmission method is also difficult to meet the needs of the URLLC service.

For the above reasons, 5G introduces a grant-free, transmission without grant, grant-less or grantless (GF) transmission method for UL transmission in new radio (NR). The so-called GF transmission mode means that when the terminal device has data to transmit, it does not need to request the UL transmission resource from the network device, but in the transmission resource pool (which may be referred to as a GF transmission resource pool) pre-configured by the network device, based on a certain rule. Select a transmission unit for UL transmission to perform UL transmission directly. In this way, the signaling interaction in the grant-based UL transmission process can be omitted, thereby reducing signaling overhead and transmission delay, and is particularly suitable for packet transmission and delay sensitive services.

In the 5G-NR standard, it has been determined that the time-frequency resource used by the GF transmission is configured by the network device, that is, the GF transmission resource pool is configured. Each GF transmission resource pool includes one or more transmission units. When the terminal device has data to transmit, at least one transmission unit is selected from the GF transmission resource pool configured for transmission. The same GF transmission resource pool can be configured for multiple terminal devices at the same time. In this case, although the transmission may fail due to collision of different transmission units by the same terminal device, the service is uncertain when it is time to arrive. It is said that since a plurality of terminal devices share the same GF transmission resource, resource utilization efficiency can be improved. The GF transmission resource pool configured by the network device to a terminal device is usually periodic, and within one cycle, the network device may configure a plurality of GF transmission resource pools for one terminal device. In this document, the GF transmission resource pool may also be referred to as “GF resource” for short, and the data sent by the terminal device using the GF resource may be simply referred to as “GF data”.

It should be understood that the GF transmission resource or the GF resource mentioned in the present application has exactly the same meaning, and may include, but is not limited to, a combination of one or more of the following resources:

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

2) frequency domain resources (also referred to as spectrum resources), for example, subcarriers, resource blocks, etc.;

3) airspace resources, for example, transmitting antennas, beams, etc.;

4) code domain resources, for example, sparse code multiple access (SCMA) codebook, low density signature (LDS) sequence, code division multiple access (CDMA) code Wait;

5) Uplink pilot resources.

From the perspective of the terminal device, the network device configures one or more GF resources that can be used to transmit the GF data, and a demodulation reference signal (DMRS) of the terminal device in each configured GF resource. ). Different terminal devices configured with the same GF resource have different DMRSs. In other words, the network device can identify the terminal device that sends the GF data according to the GF resource and the DMRS. In this sense, the index of the DMRS of the terminal device in the GF resource may also be the identifier of the terminal device (identifier/identification, ID). It should be understood that the GF data transmitted by the terminal device in the GF resource includes the DMRS and the data portion.

After the terminal device sends the GF data to the network device in the GF resource configured to itself, it is expected to receive a hybrid automatic repeat request (HARQ) acknowledgement message sent by the network device, that is, an acknowledgement (acknowledge, ACK) or non-acknowledge (NACK), indicating whether the network device correctly receives data of the terminal device. It should be understood that, in this document, the network device correctly or incorrectly receives the GF data sent by the terminal device, that is, the network device correctly or incorrectly receives the data portion of the GF data.

For a network device, since a plurality of terminal devices may simultaneously transmit data to the network device, the network device may group the terminal devices within the coverage of the network device. The network device may send a group common downlink control information (G-DCI) to a group of terminal devices by using a group common physical downlink control channel (G-PDCCH), where the G-DCI bearer A HARQ acknowledgment message for each of the set of terminal devices. Specifically, the G-DCI may include a bitmap, where each bit in the Bitmap is at most one terminal device in the group terminal device, and the location index of the corresponding bit in the Bitmap in the Bitmap may be a network device. Configured.

In addition, the network device may also configure, for the terminal device, a group ID of a group to which the terminal device belongs. The group identifier can be used to scramble the G-DCI, which is used as a radio network temporary identity (RNTI). In this case, the group identifier can also be called a group RNTI (G-RNTI), which can be scrambled. The mode or the manner of explicit carrying is included in the G-DCI to distinguish different terminal device groups.

When the terminal device sends the GF data and receives a G-DCI, the terminal device may determine, according to the group identifier, whether the G-DCI is a G-DCI corresponding to the terminal device group in which it is located, and if so, according to its own The location index obtains an acknowledgment message of the GF data from the corresponding location in the Bitmap of the G-DCI. For example, 1 indicates that the network device correctly receives, and 0 indicates that the network device does not receive correctly. In this paper, such a Bitmap is also referred to as a traditional Bitmap. In a conventional Bitmap, each bit corresponds to at most one terminal device (possibly some of the bits are reserved bits) for indicating the GF data of the terminal device.

Specifically, the network device may set the terminal device of the P GF resources to be a terminal device group, that is, the P GF resources correspond to one G-DCI, and the G-DCI is used for the terminal transmitted on the P GF resources. The device performs HARQ confirmation, and P is an integer greater than or equal to 2. For example, as shown in FIG. 2, P=2, that is, every two GF resources correspond to one G-DCI. The terminal device configured in the GF resource 1 and the GF resource 2 is the first group of terminal devices (including the UE 1-UE 24), and the corresponding group identifier is G-RNTI 1; the GF resource 3 and the GF resource 4 are configured. The terminal device is a second group of terminal devices (including UE 25-UE 48), and the corresponding group identifier is G-RNTI 2. Among them, 1-48 can be called the identity of the UE. The G-DCI corresponding to the two sets of terminal devices can be scrambled by G-RNTI 1 and G-RNTI 2, respectively.

In order to facilitate the description of the solution of the present application, the solution of the present application will be described in a manner similar to the GF resource based on FIG. 2 for dividing the terminal device group. However, it should be understood that the solution of the present application is applicable to any scenario in which a HARQ acknowledgment is performed on a GF transmission of a group of terminal devices by using a multicast acknowledgment message (such as G-DCI), that is, it is applicable to using any other terminal device grouping method and mapping to multiple The scene of the broadcast confirmation message.

Within the coverage of a network device, there may be many terminal devices that can be transmitted by the GF method, but since the data of each terminal device arrives is uncertain, the terminal device actually transmitted in each GF transmission The number may not always be a lot. This means that for a HARQ acknowledgment of a network device, there are many bits in the G-DCI Bitmap that are wasted. Assume that there are 12 available DMRSs, that is, each GF resource can be configured to 12 terminal devices at the same time. As shown in FIG. 2, in the above example of P=2, every two GF resources correspond to one G-DCI, and the Bitmap in each G-DCI includes 24 bits. GF resource 1 and GF resource 2 correspond to G-DCI 1, GF resource 3 and GF resource 4 correspond to G-DCI 2, and each GF resource is allocated to 12 UEs. However, in a certain transmission, only two UEs on GF resource 1 and GF resource 2 transmit GF data, only one UE on GF resource 3 transmits GF data, and only three UEs on GF resource 4 The GF data is transmitted, that is, a total of 8 UEs on the four GF resources transmit the GF data. According to the foregoing scheme, there are several groups of UEs, and the network device needs to send several G-DCIs. Therefore, in the above example, the network device needs to send two G-DCIs, and each G-DCI includes a Bitmap with a length of 24 bits, that is, the total length of the Bitmap that the network device needs to send is 48 bits. In fact, in the 48bits Bitmap, only 8 bits are valid, and the other 40bits are wasted, and the waste ratio is as high as 83.3%. To solve this problem, the embodiment of the present application proposes a new data transmission method.

It should be understood that, since the network device can receive the GF data sent by one or more groups of terminal devices, and respectively feed back the G-DCI to the corresponding terminal device group, in order to facilitate the description from the perspective of the terminal device, the following sends the GF data. A third terminal device (indicating any one of the terminal devices) is used as an example for description. The operations performed by other terminal devices that send the GF data are similar to the third terminal device, and are not described herein again.

FIG. 3a is a schematic flowchart of a data transmission method 300 according to an embodiment of the present application. The method 300 can be applied to the communication system 100 shown in FIG. 1, but the embodiment of the present application is not limited thereto.

S310. The third terminal device sends data to the network device by using an unlicensed resource.

S320, the network device receives data sent by the at least one terminal device that includes the third terminal device, and sends an acknowledgement message to the at least one terminal device, where the acknowledgement message includes a first bit table Bitmap and compression indication information. The first Bitmap is used to indicate whether the data sent by the at least one terminal device is correctly received, and the compression indication information is used to indicate whether the first Bitmap is a compressed Bitmap, if the first Bitmap is not a compressed Bitmap. Each bit in the first Bitmap corresponds to at most one terminal device. If the first Bitmap is a compressed Bitmap, one bit in the first Bitmap corresponds to multiple terminal devices, and/or the first Bitmap There are multiple bits corresponding to one terminal device;

It should be understood that the at least one terminal device is a terminal device that sends data to the network device by using an unlicensed resource, the at least one terminal device includes the third terminal device, and the at least one terminal device may belong to the same terminal device group, or The embodiments of the present application are not limited. In addition, the acknowledgment message may be specifically sent by using the multicast or the broadcast mode, but the embodiment of the present application does not limit this.

S330. The third terminal device receives the acknowledgement message, and determines, according to the acknowledgement message, whether data sent by the third terminal device is correctly received by the network device.

After the network device sends the acknowledgement message, the third terminal device receives the acknowledgement message, and first determines, according to the compression indication information carried in the acknowledgement message, whether the first Bitmap included in the acknowledgement message is a traditional Bitmap or a compressed Bitmap, and then the first The Bitmap determines at least one bit corresponding to itself, and further determines whether the transmitted data is correctly received by the network device. In a specific implementation, the first Bitmap sent by the network device may include a sub-bitmap corresponding to the group of terminal devices, and the third terminal device may determine, according to the pre-configured group identifier, the sub-device group in the confirmation message. Bitmap, and according to the child Bitmap, determine whether its own data is correctly received by the network device. Optionally, the sub-bitmap may be included in the foregoing G-DCI, and a group of terminal devices correspond to one G-DCI, but the embodiment of the present application does not limit this.

For a case where a network device uses a traditional Bitmap to feed back multiple sets of G-DCI, the compressed Bitmap can reduce the number of G-DCIs that need to be fed back, thereby saving bit overhead. For example, in Figure 2, if a traditional Bitmap is used, the network device needs to carry G-DCI 1 and G-DCI 2 (including both traditional Bitmaps) in the acknowledgment message. If the compressed Bitmap of the present application is used, the network device can confirm The message carries a G-DCI 3 (including a compressed Bitmap) (as shown in Figure 3b). In other words, for the example of FIG. 2, the network device needs to send two G-DCIs when using the traditional Bitmap, and only one G-DCI is sent when using the compressed Bitmap by using the method of the embodiment of the present application (as shown in FIG. 3b). As shown, in the embodiment shown in Figure 3b, the signaling overhead of the acknowledgment message is reduced by half.

Figure 3b is an example of mapping two sets of terminal devices to a compressed Bitmap (i.e., a compressed Bitmap carried by a G-DCI carries acknowledgment information for two sets of terminal devices, or acknowledgment information). Obviously, the present application can also be extended to the R group terminal device (each group of terminal devices corresponding to a traditional Bitmap) corresponding to a compressed Bitmap, R is an integer greater than or equal to 2, the larger the value of R, the transmission overhead of the present application The more effective the savings.

The embodiment of the present application is applicable to any scenario in which a GF transmission is confirmed by using a multicast acknowledgement message (for example, G-DCI), that is, a scenario applicable to any other terminal device grouping method and mapped to an acknowledgement message.

In a conventional Bitmap, the same terminal device may correspond to a plurality of bits in a Bitmap. In this case, the following is not limited in any of the following cases.

1) Network device configuration The terminal device transmits data of different transmission blocks (TBs) in different GF resources of the same GF resource group, that is, data of different HARQ processes. For example, the network device configures the terminal device 1 to transmit data of different HARQ processes in the GF resource 1 and the GF resource 2, that is, the terminal device 1 can transmit different TB data in the GF resource 1 and the GF resource 2, in this case, The TB data corresponds to one bit in the Bitmap of the acknowledgment message.

2) Network device configuration The terminal device uses multiple layers of streaming in the same GF resource. For example, the network device configures the terminal device to use the W layer stream transmission in the GF (that is, the terminal device adopts MIMO transmission), and each layer stream corresponds to one TB, and the terminal device needs to correspond to W bits in the Bitmap of the acknowledgement message, and the W devices Each bit in the bit corresponds to a TB, and W is an integer greater than or equal to 1;

3) Network device configuration The terminal device adopts code block group (CBG)-based transmission. For example, the network device configures the terminal device to divide each TB into V CBGs for transmission, and the terminal device needs to perform HARQ confirmation for each CBG. In this case, each TB sent by the terminal device needs to correspond to the Bitmap of the confirmation message. V bits, each of the V bits corresponds to a CBG, and V is an integer greater than or equal to 1.

Similarly, for a compressed Bitmap, the same terminal device may correspond to multiple sets of bits in one Bitmap, and each set of bits corresponds to one data of the terminal device (such as the same TB/CBG). It should be noted that, in the present application, there are multiple bits in a compressed Bitmap corresponding to one terminal device, which actually means that there are multiple bits corresponding to the same data of one terminal device (such as the same TB or the same CBG), instead of referring to multiple The bits correspond to different data of one terminal device.

As an optional embodiment, the compression indication information is a radio network temporary identifier RNTI or a group identifier of a terminal device group corresponding to the at least one terminal device.

It should be understood that the G-RNTI corresponding to each terminal device group may be a standard pre-defined one, or the network device may be configured to each terminal device by using signaling in advance, which is not limited in this embodiment of the present application. The signaling may be radio resource control (RRC) signaling, media access control (MAC) layer control element (CE) signaling, or other physical layer signaling (eg, DCI). This embodiment of the present application does not limit this.

It should also be understood that the foregoing network device scrambles the G-DCI by using the G-RNTI, and may generate a scrambling code sequence based on the G-RNTI, and then perform cyclic redundancy of the payload of the G-DCI to be transmitted by using the scrambling code sequence. The cyclic redundancy check (CRC) part is scrambled. Correspondingly, the third terminal device receives the scrambled acknowledgement message, and needs to use the G-RNTI to descramble the G-DCI, and the third terminal device may generate a scrambling code sequence based on the G-RNTI, and then use the scrambling code. The sequence descrambles the CRC portion of the received payload of the G-DCI. The scrambling code sequence generated based on the G-RNTI may be a G-RNTI.

In the example shown in FIG. 2, the acknowledgment message is G-DCI, and the compression indication information is G-RNTI. The terminal device group corresponding to the GF resource 1 and the GF resource 2 is identified by the G-RNTI 1 , that is, the G-DCI 1 (including the traditional Bitmap) is scrambled by the G-RNTI 1 ; the terminal device corresponding to the GF resource 3 and the GF resource 4 The group is identified by G-RNTI 2, that is, G-DCI 2 (including the traditional Bitmap) is scrambled by G-RNTI 2; the terminal device group corresponding to GF resource 1-GF resource 4 is identified by G-RNTI 3, that is, G-DCI 3 (including compressed Bitmap) scrambled with G-RNTI 3. Assuming that the third terminal device is configured in the GF resource 2, the third terminal device can determine whether the received G-DCI is based on whether the G-RNTI in the G-DCI is G-RNTI 1 or G-RNTI 3. The G-DCI that I expect, and whether the Bitmap included in the G-DCI is a Bitmap or a Bitmap. If the G-DCI is scrambled with G-RNTI 1, the G-DCI contains a legacy Bitmap; if the G-DCI is scrambled with G-RNTI 3, the G-DCI contains a compressed Bitmap.

As mentioned before, one terminal device may be configured in different terminal device groups at the same time. In this case, for one terminal device, the first group of G-RNTIs (including one or more G-RNTIs) may be used. To indicate that the G-DCI includes a legacy Bitmap, and the second set of G-RNTIs (including one or more G-RNTIs) to indicate that the G-DCI includes a compressed Bitmap, a first set of G-RNTIs and a second set of G-RNTIs The intersection is an empty set. In the same group of G-RNTIs, different G-RNTIs indicate different terminal device groups. The network device may pre-configure the first group of G-RNTIs and the second group of G-RNTIs to the terminal devices.

In another possible implementation, the compression indication information may be specifically a group ID (G-ID) of the terminal device group corresponding to the at least one terminal device. The network device may explicitly carry the G-ID in the acknowledgment message to indicate whether the currently transmitted acknowledgment message includes a Bitmap as a legacy Bitmap or a compressed Bitmap. Since the group identification G-ID is explicitly carried in the confirmation message, although the confirmation message is longer, it is more flexible.

It is assumed that in the example shown in FIG. 2, the group identifier of the terminal device group corresponding to GF resource 1 and GF resource 2 is G-ID=1, and the corresponding G-DCI 1 includes the legacy Bitmap; GF resource 3 and GF resource 4 correspond to The group identifier of the terminal device group is G-ID=2, and the corresponding G-DCI 2 includes the traditional Bitmap; the group identifier of the terminal device group corresponding to the GF resource 1-GF resource 4 is G-ID=0, and the corresponding G- DCI 3 contains a compressed Bitmap. In this way, when the third terminal device receives a G-DCI, it can determine whether the G-DCI is its desired G-DCI according to the value of the G-ID field included therein, and determine the G-DCI. Contains a compressed Bitmap or a traditional Bitmap.

It should be understood that the group identifier G-ID of each terminal device group may be standard pre-defined, or may be configured by the network device to each terminal device by using signaling in advance, which is not limited in this embodiment of the present application. The signaling may be radio resource control (RRC) signaling, media access control (MAC) layer control element (CE) signaling, or other physical layer signaling (eg, DCI). This embodiment of the present application does not limit this.

In another possible implementation, the set of identifiers can be used to scramble G-DCI (ie, scramble the CRC portion of the G-DCI), ie, as the G-RNTI described above. In this case, the above G-RNTI is the G-ID.

As an optional embodiment, the first Bitmap is a compressed Bitmap, and before the network device sends an acknowledgement message to the at least one terminal device, the method further includes:

The network device generates a first to-be-transmitted Bitmap based on a Bloom filter according to the receiving condition of the data sent by the at least one terminal device, where the Bloom filter is defined by a first hash function set, The first hash function set includes K ₁ hash functions, and K ₁ is an integer greater than or equal to 1;

The network device determines the first to-be-transmitted Bitmap as the first Bitmap.

Specifically, in a case where the network device determines to compress the Bitmap in the confirmation message, the network device may perform compression by using a Bloom Filter, and determine the compressed Bitmap as the first Bitmap. Bloom Filter is a binary vector data structure that implements efficient storage. It has good space and time efficiency and is used to determine whether an element belongs to a given set. Bloom Filter is actually a Bitmap, and its use includes stored procedures and query procedures.

1) Stored procedure: First, K hash functions are predefined, denoted as h _i (x), 1 ≤ _i ≤ K, and K is an integer greater than or equal to 1. When the element x needs to be stored in the Bloom Filter, the K hash values h ₁ (x)-h _K (x) of the element x are calculated, and the corresponding positions of the K hash values in the Bloom Filter are set to 1 (Assume that the raw value of each bit in the Bloom Filter is 0). If the position corresponding to a hash value is already 1, the value of the position remains unchanged. Similarly, if the original value of each bit in the Bloom Filter is 1, the corresponding position of the K hash values is set to 0 (referred to as the first value), and if the position corresponding to a hash value is already 0, the position is The value remains the same. For convenience of description, in this application, the description is based on the assumption that the original value of each bit in the Bloom Filter is 0. At this time, the first value is 1.

2) Query process: Assuming that the query element y is already stored in the Bloom Filter, it is also necessary to first calculate the K hash values h ₁ (y)-h _K (y) of y, and then check the K in the Bloom Filter. Whether the position corresponding to the hash value is 1, if it is, the element y is stored in the Bloom Filter, otherwise, the element y is not stored in the Bloom Filter.

FIG. 4 shows a schematic diagram of a Bloom Filter in the case of K=3, specifically for storing the elements x ₁ and x _{2 in the} Bloom Filter and checking whether the element x ₃ is stored in the Bloom Filter. After performing the above stored procedure, the positions of the three hash values corresponding to the elements x ₁ and x ₂ are already 1. Obviously, since the elements ₃ x 3 hash values corresponding to a position of a failure, therefore, not stored in the element x ₃ in Bloom Filter.

It should be understood that, in the embodiment of the present application, the foregoing element x may be an identifier (ID) of the terminal device as an input of each hash function in the first hash function set. For example, there are a total of 48 terminal devices capable of transmitting data by using GF resources in the coverage of the network device, and the identifiers are respectively 1-48. The identifiers of the terminal devices may be predefined or configured by the network device for each terminal device by using signaling. For a terminal device, each hash function in the first hash function set can map its identity to a bit position in the Bloom Filter, which is referred to as the location index of the terminal device based on the hash function.

In the Bloom Filter, each bit does not correspond to a unique element (representing a terminal device in the embodiment of the present application), which is different from a conventional Bitmap. Therefore, this application refers to such a Bloom Filter-based Bitmap as a compressed Bitmap, which is referred to as a compressed Bitmap.

It should be specially noted that the Bloom Filter query process may have a false positive. As shown in FIG. 5, only the elements x ₁ and x ₂ are actually stored in the Bloom Filter. However, since the position indexes corresponding to the elements x ₁ and x ₂ can just cover the three position indexes corresponding to the element x ₄ , according to the query. As a result, the terminal device will consider that the element x ₄ is also stored in the Bloom Filter. How to solve this situation will be described in detail later.

It should also be understood that when K=1, each terminal device corresponds to one bit in the compressed Bitmap, but one bit in the compressed Bitmap may correspond to multiple terminal devices at the same time. In this case, the standard can predefine the mapping relationship between the identity (ID) of the terminal device and the bits in the compressed Bitmap. For example, the standard may specify that a terminal device has the same location index in the compressed Bitmap as the traditional Bitmap; or, based on the ID of the terminal device, calculate the location index of the terminal device in the compressed Bitmap, such as the location index of the terminal device is ID mod L, L is the length of the compressed Bitmap. Of course, the location index of the terminal device in the compressed Bitmap can also be configured by the network device, which is not limited in this embodiment of the present application. FIG. 6 shows a schematic diagram of the Bloom Filter in the case of K=1. The length of the compressed Bitmap is L=24 bits, and the corresponding position of a terminal device in the compressed Bitmap is the same as the corresponding position in the traditional Bitmap. Of course, the above mapping rule can also be described as k=ID mod L, where k is the position index of each bit in the Bitmap, and the value range is 1≤k≤L.

The implementation of the compressed Bitmap can be based on other compression rules in addition to the Bloom Filter. If the protocol allows a compressed Bitmap to be implemented using multiple compression rules, then in the case of using a compressed Bitmap, the network device also needs to indicate to the terminal device the compression rules currently in use. The compression rule indication may be that the network device is configured in advance to the terminal device (for example, configured to the terminal device by using RRC signaling, MAC CE, or physical layer signaling), or may be dynamically carried in the HARQ acknowledgement message. The embodiment of the present application does not limit this.

In this embodiment, the compressed Bitmap can be used to transmit ACK information of the terminal device, that is, which GF data of the terminal device is correctly received by the network device (implicitly the GF data of other terminal devices is not correctly received), and the compression is performed. Bitmap can be called ACK Bloom Filter (ACK BF). The compressed Bitmap can also be used to transmit NACK information of the terminal device, that is, which GF data of the terminal device is not correctly received by the network device (implicitly the GF data of other terminal devices are correctly received), and the compressed Bitmap can be called NACK. BF.

It should be understood that the ACK BF is applicable to the case where the network device correctly receives the GF data of the less terminal device, and the NACK BF is applicable to the case where most of the terminal devices that have transmitted the GF data are correctly received by the network device. For the latter, only a small number of terminal devices need to be replied to NACK, so transmitting NACK information with a compressed Bitmap is suitable for such a scenario. For example, most of the terminal devices configured in the GF resource 1-GF resource 4 have sent the GF data and are correctly received by the network device. In this case, only the terminal device that has sent the GF data to a small amount and is not correctly received by the network device replies with a NACK. Just send a G-DCI, obviously saving more transmission overhead.

It should also be understood that whether the compressed Bitmap carries ACK information or NACK information may be predefined or the network device is configured to each terminal device by signaling. In a possible implementation, the standard has pre-defined the compressed Bitmap sent by the network device to carry the ACK or NACK. In the actual transmission process, there are only two types of Bitmap: the traditional Bitmap and the compressed Bitmap (the bearer ACK or the defined bearer) NACK), in this way, the network device only needs to indicate whether the first Bitmap included in the confirmation message is a traditional Bitmap or a compressed Bitmap through the above-mentioned compression indication information. In another possible implementation manner, during the actual transmission process, there may be three types of Bitmap: a traditional Bitmap, a Bitmap carrying an ACK, and a Bitmap carrying a NACK. In this case, the network device not only needs to indicate whether the first Bitmap included in the confirmation message is a traditional Bitmap or a compressed Bitmap, but also needs to further indicate whether the compressed Bitmap carries an ACK or a NACK. The network device may specifically distinguish the above three types of Bitmaps by using a G-RNIT or a group identifier, and details are not described herein again.

For the above case where three types of Bitmaps need to be distinguished, another possible implementation manner is to distinguish between compressed Bitmap and traditional Bitmap by G-RNTI scrambling, and further distinguish ACK by explicit indication in G-DCI in the case of compressing Bitmap. BF and NACK BF. In this case, the compression indication is G-RNTI (implicit indication), and the specific compression type (ACK BF or NACK BF) is distinguished by an explicit indication.

To facilitate the description of the solution of the present application, other embodiments are described in this application by using ACK BF as an example. It should be understood that these embodiments are also applicable to NACK BF.

As an optional embodiment, the first to-be-transmitted Bitmap carries the acknowledgement ACK information sent by the network device to the M first terminal devices in the at least one terminal device, and the network device correctly receives the The data sent by the M first terminal devices, M is an integer greater than or equal to 1, and the bit value of the position corresponding to the K ₁ hash values of each of the first terminal devices in the first to-be-transmitted Bitmap All are the first value.

Wherein the first transmission to be understood as a Bloom Filter Bitmap are all bits of the original value, on this basis, according to the K terminal of each of the first hash value of _a device to be sent to a first position corresponding to a Bitmap The bit value is set to a first value, and the Bloom Filter storing the hash value corresponding to each first terminal device is still referred to as a first to-be-transmitted Bitmap.

And determining, by the third terminal device, the data sent by the third terminal device according to the first Bitmap, if the network device determines that the first to-be-sent Bitmap is determined to be sent by using the first Bitmap. Whether it is correctly received by the network device, including:

The third terminal of the first device determines Bitmap, the K bit positions with the third terminal device hash value corresponding to _a value of a first value if both;

K bit positions if the third terminal apparatus and _a corresponding hash values are the values of the first value, determining the third data transmitted from the third terminal device by the network terminal device The device receives correctly;

If the K value of the bit position of the third terminal device and _a corresponding hash values are not the first value, the third terminal apparatus determines the third terminal device transmitting the data was not The network device is correctly received.

Specifically, the network device determines, in the confirmation message, which GF data of the terminal device is correctly received, that is, the first Bitmap carries the ACK information, and the network device may first determine the identifier (ID) of the M first terminal devices that are correctly received. Using the first hash function set as described above, the identifiers of the M first terminal devices are taken as inputs, and the K ₁ hash values of each first terminal device are calculated, and the first pending send Bitmap and the K ₁ hash values are used. The corresponding location is set to a first value, for example 1, that is, the storage process of the above Bloom Filter is executed, and the first to-be-sent Bitmap is generated. The network device determines the first to-be-transmitted Bitmap as the first Bitmap, and sends the bitmap to the at least one terminal device. The third terminal device of the at least one terminal device performs the query process of the Bloom Filter according to its own K ₁ hash value, and determines whether the data sent by itself is correctly received by the network device. Wherein said third K-bit position of _a terminal apparatus corresponding hash values are not the values of the first value of K refers to the bit position of said third terminal device corresponding to _a hash value At least one is not the first value.

Since the first Bitmap is generated on the basis of the first to-be-transmitted Bitmap, the length of the first to-be-transmitted Bitmap is equal to the length of the first Bitmap. In addition, in the first to-be-transmitted Bitmap, the values of all the bits are original values, and the original values are not equal to the first value. In a possible implementation manner, the original values of each bit in the first to-be-transmitted Bitmap are all zero.

It should be understood that the foregoing first value may be a predefined one (that is, a standard predefined Bloom Filter original value), or may be configured by the network device for each terminal device (that is, the network device is configured with a Bloom Filter original value). This is not limited. It should also be understood that the third terminal device may determine its own K ₁ hash values in a plurality of manners, that is, determine the location of at least one bit corresponding to itself in the Bitmap fed back by the network device, and may adopt its own ID and the first hash. Xi calculated set of functions may also be received directly K network device transmits _a hash value of the present application is not limited in this embodiment.

It should also be appreciated that the network device K can be precomputed at least one terminal device to each terminal device _a hash value, and stored in the memory, it sends a confirmation message to the terminal equipment when used directly in the subsequent need to save The calculation of the overhead, the network device can also calculate the K ₁ hash values of each of the specific terminal devices each time the acknowledgment message needs to be sent to the specific terminal device, thereby saving the storage overhead. This is not limited.

As an optional embodiment, before the third terminal device determines, in the first Bitmap, whether the value of the bit corresponding to the hash value of the third terminal device is the first value, The method also includes:

The third terminal apparatus according to the identifier of the first hash function, and the third set of terminal equipment, calculates the hash values K ₁ of the third terminal device.

In particular, the apparatus according to the third terminal set of a first hash function and its own ID, to calculate the K terminal of the third device _a hash value, for execution of a query. Since the ID of the third terminal device is common to the network device and the third terminal device (the network device configures the ID of the third terminal device by signaling), the same hash function is used for the same ID, and the network device is used. the third terminal device obtained in the first compressing the third terminal device Bitmap K ₁ corresponding bit position and a third terminal device obtained in the first compressed bit positions K ₁ Bitmap is consistent with the corresponding .

In this case, the foregoing first hash function set may be pre-defined, or may be configured for the network device by using the signaling for each terminal device, which is not limited in this embodiment of the present application. The signaling may be radio resource control (RRC) signaling, media access control (MAC) layer control element (CE) signaling, or other physical layer signaling (eg, DCI). This embodiment of the present application does not limit this.

As an optional embodiment, before the network device receives the data that is sent by the at least one terminal device by using the unlicensed resource, the method further includes:

The network device calculates K ₁ hash values of each terminal device according to the first hash function set and an identifier of each terminal device in the at least one terminal device;

The network device sends respective K ₁ hash values to each of the terminal devices. ;

Is correspondingly, K the network device receiving the terminal device transmitting the third terminal of the third device _a hash value.

Specifically, since the calculation of the hash value requires a certain computational overhead, in order to reduce the computational overhead of the terminal device and further save power, the network device may calculate the hash value of the terminal device based on the identifier ID of the terminal device, and directly calculate the result. The device is sent to the terminal device, that is, the network device directly instructs the terminal device to compress the position of the corresponding K ₁ bit in the Bitmap. In this case, the first hash function set may be standard pre-defined or implemented internally by the network device, and the terminal device does not need to know the specific form of the first hash function set.

It should be understood that the at least one terminal device may configure, for the network device, a GF resource terminal device (that is, a device that allows data to be sent to the network device by using the GF mode), and the network device may calculate the at least one terminal in an initial stage. K ₁ hash values of each terminal device in the device are separately distributed to the at least one terminal device for subsequent direct use.

As an optional embodiment, the determining, by the network device, the first to-be-transmitted Bitmap is the first Bitmap, including:

Determining, by the network device, whether the first to-be-sent Bitmap will cause a false positive according to the receiving situation of the data sent by the at least one terminal device and the first hash function set;

The network device determines the first to-be-transmitted Bitmap as the first Bitmap if the network device determines that the first to-be-transmitted Bitmap does not cause a false positive.

As mentioned above, the use of the Bloom Filter-based compressed Bitmap for GF transmission confirmation may result in false positives. The misjudgment here can be defined as: the terminal device sends the GF data, and the network device does not receive it correctly, but the terminal device considers that the network device correctly receives the GF data according to the received compressed Bitmap. Assume that the terminal device 1 (identified as x ₁ ), the terminal device 2 (identified as x ₂ ), and the terminal device 4 (identified as x ₄ ) have transmitted the GF data, but the network device only correctly receives the terminal device 1 and the terminal device 2 The data. In this case, if the network device uses the compressed Bitmap for confirmation, and the corresponding location of the different terminal devices in the compressed Bitmap is as shown in FIG. 5, the terminal device 4 obviously considers that the network device also correctly received its own GF data, and thus follows. This data will not be retransmitted. In fact, the network device does not correctly receive the data of the terminal device 4.

Therefore, in the embodiment of the present application, in order to prevent the third terminal device from being misjudged, after the network device generates the first to-be-transmitted Bitmap, the network device may first determine whether the first to-be-sent Bitmap will cause a misjudgment, that is, determine to adopt a compressed Bitmap. Whether the feedback causes a misjudgment, and if the misjudgment is not caused, the first to-be-transmitted Bitmap is determined to be the first Bitmap transmission. If the compression of the Bitmap will lead to misjudgment, the network device can choose to still use the traditional Bitmap as the first Bitmap to feedback to avoid misjudgment.

As an optional embodiment, in a case that the network device determines that the first to-be-transmitted Bitmap may cause a false positive, the compression indication information is used to indicate that the first Bitmap is not a compressed Bitmap, that is, the first A Bitmap is a traditional Bitmap.

As an optional embodiment, the network device determines, according to the receiving condition of the data sent by the at least one terminal device and the first hash function set, whether the first to-be-transmitted Bitmap may cause a false positive, including :

And the network device determines, according to the first hash function set and the N second terminals, that the network device determines that the data sent by the N second terminal devices in the at least one terminal device is not correctly received. An identifier of each second terminal device in the device, respectively calculating K ₁ hash values of each second terminal device, where N is an integer greater than or equal to 1;

The network device determines whether the target of the second terminal device the N second terminal device, the first transmission to be in Bitmap, the target position and K ₁ of the second terminal device hash values corresponding to The bit values are all the first value;

If the target second terminal device exists, the network device determines that the first to-be-sent Bitmap causes a misjudgment;

If the target second terminal device does not exist, the network device determines that the first to-be-transmitted Bitmap does not cause a false positive.

It should be understood that, in the GF transmission, the terminal device is distinguished by the DMRS, and the ID of the at least one terminal device may also be the DMRS of the at least one terminal device. Therefore, the network device can determine which terminal devices have transmitted the GF data based on the detected DMRS in the GF resource. The terminal device in which the network device detects the DMRS but does not correctly solve the data portion is the terminal device among the N second terminal devices.

Among the terminal devices that have detected the GF data detected by the network device, the data portions of some terminal devices are correctly received by the network device, and these terminal devices are called ACK terminal devices (corresponding to the above M first terminal devices), and other UEs. The data portion is not correctly received by the network device, which is called a NACK terminal device (corresponding to the above N second terminal devices). The network device can determine whether the use of the compressed Bitmap for acknowledgment will be misjudged based on the IDs of the ACK terminal device and the NACK terminal device. Specifically, the network device stores the IDs of all ACK terminal devices in a compressed Bitmap according to rules, and then queries the ID of the NACK terminal device. If there is any NACK terminal device ID query result is in the compressed Bitmap, it is determined that using the compressed Bitmap will lead to misjudgment; if all NACK terminal device ID query results are not in the compressed Bitmap, then it is determined that the compressed Bitmap will not be used. Lead to misjudgment.

It should be understood that in some cases, due to channel deep fading, obstacle blocking, etc., even if the terminal device transmits the GF data, the network device may not detect the DMRS therein. In this case, the network device determines whether the misjudgment may be inaccurate based on the detected DMRS. Therefore, the network device can judge whether the compressed Bitmap will be misjudged based on the energy detected in the GF resource. Each GF resource includes one or more transmission units, and each transmission unit is used to transmit GF data. The network device detects all transmission units of each GF resource in the GF resource, and for the detection result of any of the transmission units, three situations may occur:

1) no transmission is detected (ie, the energy of the signal detected by the network device is less than the first threshold);

2) detecting a signal (ie, the capability of the signal detected by the network device is greater than the first threshold), but not detecting any DMRS;

3) DMRS is detected.

For case 2), the network device can consider that some terminal devices send GF data, but the network device does not detect the DMRS. In this case, the network device determines that a misjudgment may occur, so the traditional Bitmap is used for confirmation. If the detection result of the network device on all the transmission units in the GF resource group is not the case 2), the network device may determine whether the compressed Bitmap will be misjudged according to the method of performing the query process described above, and if a misjudgment occurs, the traditional device is adopted. Bitmap, otherwise, use a compressed Bitmap.

It should be specially noted that the network device can use the compressed Bitmap for HARQ confirmation feedback (described in the example of Figure 5):

1) The GF data of the terminal device 1 (identified as x ₁ ), the terminal device 2 (identified as x ₂ ), and the terminal device 4 (identified as x ₄ ) are correctly received by the network device. At this time, using the compressed Bitmap feedback, the terminal device 1, the terminal device 2, and the terminal device 4 also consider that the network device correctly receives its own data, which is in line with the actual situation;

2) The terminal device 1 and the terminal device 2 transmit the GF data and are all correctly received by the network device, and the terminal device 4 does not transmit the GF data. In this case, since the terminal device 4 does not transmit the GF data, the terminal device 4 does not receive the acknowledgment message, so there is no erroneous determination.

Therefore, the network device performs the foregoing query process for determining whether a misjudgment occurs, and is for the terminal device that sends the GF data and the GF data is not correctly received by the network device, that is, the N second terminal devices, the N The second terminal device is included in at least one terminal device, and N is greater than or equal to 1. It should be understood that if the N second terminal devices are not present, the network device may not need to perform a process of erroneously determining the query.

As an optional embodiment, the network device sends an acknowledgement message to the at least one terminal device according to the receiving situation of the data sent by the at least one terminal device, including:

Sending, by the network device, the acknowledgement message to the at least one terminal device, where the acknowledgement message includes function set indication information, where the function set indication information is used to indicate an identifier of the first hash function set;

Correspondingly, the third terminal device receives the acknowledgement message sent by the network device according to the receiving situation of the data sent by the at least one terminal device, and includes:

Receiving, by the third terminal device, the acknowledgement message sent by the network device, where the acknowledgement message includes function set indication information, where the function set indication information is used to indicate an identifier of the first hash function set;

The third terminal device determines the first hash function set according to the function set indication information.

Specifically, the network device may pre-define a plurality of hash function sets, and when sending the confirmation message to the terminal device, carry the identifier of the first hash function set for generating the Bloom Filter in the confirmation message, and send the same to the And the terminal device determines, according to the identifier of the first hash function set, the hash function used by the network device, to further determine whether the network device correctly receives the data sent by the terminal device.

As an optional embodiment, before the sending, by the network device, the acknowledgement message to the at least one terminal device according to the receiving condition of the data sent by the at least one terminal device, the method further includes:

Determining at said first network device to be sent Bitmap cause misjudgment of the situation, the network device determines a second set of hash function, the hash function and the second set of hash functions comprising K _2, K ₂ is an integer greater than or equal to 1;

The network device generates second to-be-sent information based on the second hash function set;

When the network device determines that the second to-be-sent information does not cause a false positive, the network device determines the second to-be-sent information as the first bitmap;

Sending, by the network device, an acknowledgement message to the at least one terminal device according to the receiving situation of the data sent by the at least one terminal device, including:

The network device sends the acknowledgement message to the at least one terminal device, where the acknowledgement message includes function set indication information, and the function set indication information is used to indicate an identifier of the second hash function set.

Receiving, by the third terminal device, the acknowledgement message sent by the network device, where the acknowledgement message includes function set indication information, where the function set indication information is used to indicate an identifier of the second hash function set;

The third terminal device determines the second hash function set according to the function set indication information.

It is assumed that L hash function sets are defined, and their indices are H _j , L ≥ 2, and 1 ≤ _j ≤ L, respectively. The number of hash functions included in any two hash function sets may be the same or different. For example, the L hash function sets each contain K hash functions. After receiving the GF data, the network device sends an acknowledgement message carrying the compressed Bitmap, and the acknowledgement message further includes an index _Hj of the hash function set used by the compressed Bitmap. Specifically, the confirmation message may be a G-DCI. The third terminal device determines the hash function set used by the query compression Bitmap based on the index of the hash function set in the confirmation message.

It should be understood that the multiple hash function sets may be pre-defined, or may be configured for the network device by using the signaling for each terminal device, which is not limited in this embodiment of the present application. The signaling may be radio resource control (RRC) signaling, media access control (MAC) layer control element (CE) signaling, or other physical layer signaling (eg, DCI). This embodiment of the present application does not limit this.

Optionally, the function set indication information and the compression indication information may be the same indication information, thereby reducing the indication overhead.

In a possible implementation, the network device may adopt a G-RNTI method. For a certain terminal device, the network device may configure G-RNTI 0 to correspond to a G-DCI carrying a traditional Bitmap, and G-RNTI 1 corresponds to bearer compression. Bitmap and set index is a hash function H G-DCI is _1, G-RNTI 2 corresponding to the compression carried Bitmap and set index is a hash function H G-DCI ₂ a.

In another possible implementation manner, the network device may adopt a method for explicitly carrying a G-ID. For a certain terminal device, the network device may configure a G-ID 0 corresponding to a G-DCI carrying a traditional Bitmap, and a G-ID. 1 corresponds to a hash function and bearer Bitmap compression set H G-DCI index of _1, G-ID 2 corresponding to the compression carried Bitmap and set index is a hash function G-DCI H ₂ in.

As an optional embodiment, the first to-be-transmitted Bitmap carries negative acknowledgement NACK information sent by the network device to N second terminal devices in the at least one terminal device, and the network device does not correctly receive the The data sent by the N second terminal devices, where N is an integer greater than or equal to 1, and the bits of the first to-be-transmitted Bitmap corresponding to the K ₁ hash values of each of the second terminal devices are taken. The values are all the first values.

If the bit position of the third terminal device K ₁ values are hash values corresponding to said first value, determining the third data terminal device transmits the third terminal of the device is not The network device receives correctly;

K bit positions if the third terminal apparatus and _a corresponding hash value are not the values of the first value, determining the third data transmitted from the terminal device by the third terminal device The network device receives it correctly.

Specifically, the network device may indicate, in the acknowledgment message, which GF data of the terminal device is not correctly received, that is, the first Bitmap carries the NACK information, and the network device may first determine the identifiers (IDs of the N second terminal devices that are not correctly received. And using the first hash function set, using the identifiers of the N second terminal devices as input, calculating a hash value of each second terminal device, and corresponding to the K ₁ hash values in the first to-be-transmitted Bitmap The location is set to a first value, for example 1, that is, the stored procedure of the above Bloom Filter is executed, and a first to-be-sent Bitmap is generated. The network device determines the first to-be-transmitted Bitmap as the first Bitmap, and sends the bitmap to the at least one terminal device. The third terminal device of the at least one terminal device performs the query process of the Bloom Filter according to its own K ₁ hash value, and determines whether the data sent by itself is correctly received by the network device.

Since the first Bitmap is generated on the basis of the first to-be-transmitted Bitmap, the length of the first to-be-transmitted Bitmap is equal to the length of the first Bitmap. In addition, in the first to-be-transmitted Bitmap, the values of all the bits are original values, and the original values are not equal to the first value. In a possible implementation manner, the original values of the bits in the first to-be-transmitted Bitmap are all 0.

In the case that the first Bitmap carries the NACK information, the network device determines whether adopting the compressed Bitmap may cause a false positive, and may perform a query process of compressing the Bitmap according to the identifiers of the M first terminal devices that the data has been correctly received. It should be understood that the embodiment that carries the NACK information in the first Bitmap is similar to the embodiment in which the ACK information is carried in the first Bitmap, and details are not described herein again.

It should be understood that the size of the sequence numbers of the above-mentioned processes does not imply a sequence of executions, and the order of execution of the processes should be determined by its function and internal logic, and should not be construed as limiting the implementation process of the embodiments of the present application.

The data transmission method according to the embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 6. The data transmission apparatus according to the embodiment of the present application will be described in detail below with reference to FIG. 7 to FIG.

FIG. 7 shows a data transmission device 700 provided by an embodiment of the present application. The device 700 includes:

The receiving unit 710 is configured to receive data that is sent by at least one terminal device by using an unlicensed resource;

The sending unit 720 is configured to send, according to the receiving condition of the data sent by the at least one terminal device, an acknowledgement message to the at least one terminal device, where the acknowledgement message includes a first bit table Bitmap and compression indication information, where the The first Bitmap is configured to indicate whether the data sent by the at least one terminal device is correctly received, where the compression indication information is used to indicate whether the first Bitmap is a compressed Bitmap, and if the first Bitmap is not a compressed Bitmap, the first Each bit in a Bitmap corresponds to at most one terminal device. If the first Bitmap is a compressed Bitmap, one bit in the first Bitmap corresponds to multiple terminal devices, and/or multiple in the first Bitmap The bit corresponds to a terminal device.

The data transmission device of the embodiment of the present invention, through the network device, reasonably selects whether to compress the Bitmap in the acknowledgment message sent to the terminal device, and carries the compression indication information in the acknowledgment message to indicate the network device. Whether the Bitmap in the acknowledgment message is compressed, so that the terminal device can correctly parse the Bitmap in the acknowledgment message according to the compression indication information, thereby saving the overhead in the process of confirming the message transmission, thereby improving system performance.

Optionally, the compression indication information is a radio network temporary identifier RNTI or a group identifier of a terminal device group corresponding to the at least one terminal device.

Optionally, the first Bitmap is a compressed Bitmap, and the device further includes:

a processing unit, configured to generate, according to the receiving condition of the data sent by the at least one terminal device, a first to-be-sent Bitmap based on the receiving condition of the data sent by the at least one terminal device, where the cloth is sent to the at least one terminal device The filter is defined by a first hash function set, the first hash function set includes K ₁ hash functions, and K ₁ is an integer greater than or equal to 1; the first to-be-transmitted Bitmap is determined as The first Bitmap.

Optionally, the first to-be-transmitted Bitmap carries the acknowledgement ACK information sent by the network device to the M first terminal devices in the at least one terminal device, and the device correctly receives the M first terminals. The data sent by the device, M is an integer greater than or equal to 1, and the value of the bit corresponding to the K ₁ hash value of each of the first terminal devices in the first to-be-transmitted Bitmap is the first value. .

Optionally, the processing unit is further configured to: according to the first hash function set and each terminal in the at least one terminal device, before the receiving, by the at least one terminal device, the data sent by the unlicensed resource the identification device calculates said at least one terminal device ₁ K of each terminal device hash values; and the sending unit 720 is further configured to: send to the at least one terminal of each of the at least one terminal device K ₁ hash values of each terminal device in the terminal device.

Optionally, the processing unit is configured to: determine, according to the receiving condition of the data sent by the at least one terminal device, and the first hash function set, whether the first to-be-transmitted Bitmap may cause a false positive; The first to-be-transmitted Bitmap is determined as the first Bitmap if the first to-be-transmitted Bitmap does not cause a false positive.

Optionally, the processing unit is specifically configured to: according to the data that is sent by the N second terminal devices in the at least one terminal device, according to the first hash function set and the N identifying a second terminal of each of the second terminal apparatus, K ₁ calculates the hash values of each of the second terminal device, N being an integer greater than or equal to 1; and determining the N second terminals a second terminal device whether the target device, to be sent in the first Bitmap, the K bit positions of the second target terminal device ₁ corresponding hash value are the values of the first value; If the target second terminal device exists, determining that the first to-be-transmitted Bitmap may cause a false positive; if the target second terminal device does not exist, determining that the first to-be-transmitted Bitmap does not cause a false positive.

Optionally, the sending unit is specifically configured to: 720: the network device sends the acknowledgement message to the at least one terminal device, where the acknowledgement message includes function set indication information, where the function set indication information is used to indicate The identifier of the first hash function set.

Optionally, the processing unit is further configured to determine the first to-be-sent Bitmap before sending the acknowledgement message to the at least one terminal device according to the receiving situation of the data sent by the at least one terminal device In the case of a false positive, a second hash function set is determined, the second hash function set includes K ₂ hash functions, K ₂ is an integer greater than or equal to 1; based on the second hash function And generating, by the set, the second to-be-sent information; determining, in the case that the second to-be-sent information does not cause a erroneous determination, the second to-be-sent information is the first bitmap; the sending unit 720 is specifically configured to: Transmitting the acknowledgement message to the at least one terminal device, the acknowledgement message including function set indication information, the function set indication information being used to indicate an identifier of the second hash function set.

Optionally, in a case that the first to-be-transmitted Bitmap may cause a false positive, the compression indication information is used to indicate that the first Bitmap is not a compressed Bitmap.

Optionally, the first to-be-transmitted Bitmap carries the negative acknowledgement NACK information sent by the network device to the N second terminal devices in the at least one terminal device, and the device does not correctly receive the N second The data sent by the terminal device, N is an integer greater than or equal to 1. The bit value of the position corresponding to the K ₁ hash values of each of the second terminal devices in the first to-be-transmitted Bitmap is the first value. Value.

It should be understood that the apparatus 700 herein is embodied in the form of a functional unit. The term "unit" as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (eg, a shared processor, a proprietary processor, or a group) for executing one or more software or firmware programs. Processors, etc.) and memory, merge logic, and/or other suitable components that support the described functionality. In an alternative example, those skilled in the art may understand that the device 700 may be specifically the network device in the foregoing embodiment, and the device 700 may be used to perform various processes and/or steps corresponding to the network device in the foregoing method embodiments. To avoid repetition, we will not repeat them here.

FIG. 8 shows another data transmission device 800 provided by an embodiment of the present application. The device 800 includes:

The sending unit 810 is configured to send data to the network device by using an unlicensed resource;

The receiving unit 820 is configured to receive an acknowledgement message sent by the network device according to the receiving situation of data sent by the at least one terminal device, where the at least one terminal device includes the device, where the acknowledgement message includes a first bit table Bitmap and compression Instructing information, wherein the first Bitmap is used to indicate whether the data sent by the at least one terminal device is correctly received, and the compression indication information is used to indicate whether the first Bitmap is a compressed Bitmap, if the first Bitmap The included bit is not a compressed Bitmap, and each bit in the first Bitmap corresponds to at most one terminal device. If the first Bitmap is a compressed Bitmap, one bit in the first Bitmap corresponds to multiple terminal devices, and / or a plurality of bits in the first Bitmap corresponding to one terminal device;

The processing unit 830 is configured to determine, according to the acknowledgement message, whether data sent by the device is correctly received by the network device.

Optionally, the first Bitmap carries the acknowledgement ACK information sent by the network device to the M first terminal devices in the at least one terminal device, and the network device correctly receives the M first terminal devices The data sent, M is an integer greater than or equal to 1; the processing unit 830 is specifically configured to: determine whether the value of the bit corresponding to the K ₁ hash value of the device in the first Bitmap is a first value, K ₁ is an integer greater than or equal to 1; if the value of the bit corresponding to the K ₁ hash value of the device is the first value, determining that the data sent by the device is correctly received by the network device; K ₁ bit position corresponding hash values, if the value of the device are not the first value, determining said data transmitting means is not correctly received by the network device .

Optionally, in determining the first Bitmap, the bit position K ₁ hash values corresponding to the values before the apparatus if both the first value, the processing unit 830 is further configured to: according to a first a hash function set and an identifier of the device, calculating K ₁ hash values of the device, the first hash function set including K ₁ hash functions; or the receiving unit 820 is further configured to: Receiving K ₁ hash values of the device sent by the network device.

Optionally, the receiving unit 820 is specifically configured to: receive the acknowledgement message sent by the network device, where the acknowledgement message includes function set indication information, where the function set indication information is used to indicate the first hash The processing unit 830 is specifically configured to: determine the first hash function set according to the function set indication information.

Optionally, the first Bitmap carries negative acknowledgement NACK information sent by the network device to N second terminal devices in the at least one terminal device, and the network device does not correctly receive the N second terminals. The data sent by the device, N is an integer greater than or equal to 1; the processing unit 830 is specifically configured to: determine whether the value of the bit corresponding to the K ₁ hash value of the device in the first Bitmap is a first value; if the value of the bit corresponding to the K ₁ hash value of the device is the first value, determining that the data sent by the device is not correctly received by the network device; The bit values of the locations corresponding to the K ₁ hash values of the device are not all the first values, and it is determined that the data sent by the device is correctly received by the network device.

It should be understood that the apparatus 800 herein is embodied in the form of a functional unit. The term "unit" as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (eg, a shared processor, a proprietary processor, or a group) for executing one or more software or firmware programs. Processors, etc.) and memory, merge logic, and/or other suitable components that support the described functionality. In an optional example, those skilled in the art may understand that the device 800 may be specifically the third terminal device in the foregoing embodiment, and the device 800 may be used to perform various processes corresponding to the third terminal device in the foregoing method embodiment. / or steps, in order to avoid repetition, will not repeat them here.

FIG. 9 shows another data transmission device 900 provided by an embodiment of the present application. The apparatus 900 includes a processor 910, a transceiver 920, and a memory 930. The processor 910, the transceiver 920, and the memory 930 communicate with each other through an internal connection path. The memory 930 is configured to store instructions, and the processor 910 is configured to execute instructions stored in the memory 930 to control the transceiver 920 to send signals and / or receive signals.

The transceiver 920 is configured to receive data that is sent by the at least one terminal device by using an unlicensed resource, and send an acknowledgement message to the at least one terminal device according to the received condition of the data sent by the at least one terminal device, where the acknowledgement message is sent. The first bit table is used to indicate whether the first bit map is compressed or not, and the first bit map is used to indicate whether the data sent by the at least one terminal device is correctly received, and the compression indication information is used to indicate whether the first bitmap is compressed. Bitmap, if the first Bitmap is not a compressed Bitmap, each bit in the first Bitmap corresponds to at most one terminal device, and if the first Bitmap is a compressed Bitmap, there is one bit corresponding to the first Bitmap. The terminal device, and/or the plurality of bits in the first Bitmap, correspond to one terminal device.

It should be understood that the device 900 may be specifically the network device in the foregoing embodiment, and may be used to perform various steps and/or processes corresponding to the network device in the foregoing method embodiments. Alternatively, the memory 930 can include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory. For example, the memory can also store information of the device type. The processor 910 can be configured to execute instructions stored in a memory, and when the processor 910 executes instructions stored in the memory, the processor 910 is configured to perform the various steps of the method embodiments corresponding to the network device described above and/or Or process.

FIG. 10 shows another data transmission device 1000 provided by an embodiment of the present application. The apparatus 1000 includes a processor 1010, a transceiver 1020, and a memory 1030. The processor 1010, the transceiver 1020, and the memory 1030 communicate with each other through an internal connection path. The memory 1030 is configured to store instructions, and the processor 1010 is configured to execute instructions stored by the memory 1030 to control the transceiver 1020 to send signals and / or receive signals.

The transceiver 1020 is configured to send data to the network device by using an unlicensed resource, and receive an acknowledgement message sent by the network device according to the receiving condition of the data sent by the at least one terminal device, where the at least one terminal device includes the device, The confirmation message includes a first bit table Bitmap and compression indication information, where the first Bitmap is used to indicate whether the data sent by the at least one terminal device is correctly received, and the compression indication information is used to indicate the first Whether the Bitmap is a compressed Bitmap, if the bit included in the first Bitmap is not a compressed Bitmap, each bit in the first Bitmap corresponds to at most one terminal device, and if the first Bitmap is a compressed Bitmap, the first One bit in the Bitmap corresponds to a plurality of terminal devices, and/or a plurality of bits in the first Bitmap are associated with one terminal device; the processor 1010 is configured to determine, according to the acknowledgement message, whether data sent by the device is The network device receives correctly.

It should be understood that the device 1000 may be specifically the third terminal device in the foregoing embodiment, and may be used to perform various steps and/or processes corresponding to the third terminal device in the foregoing method embodiment. Optionally, the memory 1030 can include read only memory and random access memory and provides instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory. For example, the memory can also store information of the device type. The processor 1010 can be configured to execute instructions stored in a memory, and when the processor 1010 executes an instruction stored in the memory, the processor 1010 is configured to perform the steps of the method embodiment corresponding to the third terminal device And / or process.

It should be understood that, in the embodiment of the present application, the processor of the foregoing apparatus may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits. (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software. The steps of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software units in the processor. The software unit can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in a memory, and the processor executes instructions in the memory, in combination with hardware to perform the steps of the above method. To avoid repetition, it will not be described in detail here.

It should be understood that the term "and/or" herein is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

Those skilled in the art will appreciate that the various method steps and elements described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the steps and composition of the various embodiments have been generally described in terms of function in the foregoing description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. Different methods may be used to implement the described functionality for each particular application, but such implementation should not be considered to be beyond the scope of the application.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present application.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be in essence or part of the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any equivalents can be easily conceived by those skilled in the art within the technical scope disclosed in the present application. Modifications or substitutions are intended to be included within the scope of the present application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

A method for confirming unauthorized data transmission, comprising:

The network device receives data sent by at least one terminal device using an unlicensed resource;

The network device sends an acknowledgement message to the at least one terminal device according to the received condition of the data sent by the at least one terminal device, where the acknowledgement message includes a first bit table Bitmap and compression indication information, where the first The Bitmap is configured to indicate whether the data sent by the at least one terminal device is correctly received, where the compression indication information is used to indicate whether the first Bitmap is a compressed Bitmap, and if the first Bitmap is not a compressed Bitmap, the first Bitmap Each bit in the at least one terminal device, if the first Bitmap is a compressed Bitmap, one bit in the first Bitmap corresponds to a plurality of terminal devices, and/or a plurality of bits in the first Bitmap are corresponding to each other. A terminal device.
The method according to claim 1, wherein the compression indication information is a radio network temporary identifier RNTI or a group identifier of a terminal device group corresponding to the at least one terminal device.
The method according to claim 1 or 2, wherein the first Bitmap is a compressed Bitmap, and before the network device sends an acknowledgement message to the at least one terminal device, the method further includes:

The network device generates a first to-be-transmitted Bitmap based on a Bloom filter according to the receiving condition of the data sent by the at least one terminal device, where the Bloom filter is defined by a first hash function set, The first hash function set includes K 1 hash functions, and K 1 is an integer greater than or equal to 1;

The network device determines the first to-be-transmitted Bitmap as the first Bitmap.
The method according to claim 3, wherein the first to-be-transmitted Bitmap carries acknowledgement ACK information sent by the network device to M first terminal devices in the at least one terminal device, the network said apparatus correctly receives the M data transmitted from a first terminal device, M being an integer greater than or equal to 1, the first to be sent to each of the K Bitmap with the first terminal device a hash value corresponding to The bit values of the positions are all the first values.
The method according to claim 3 or 4, wherein before the network device receives the data that the at least one terminal device transmits using the unlicensed resource, the method further includes:

Calculating, according to the first hash function set and the identifier of each terminal device in the at least one terminal device, the network device calculates K 1 hash values of each terminal device;

The network device sends respective K 1 hash values to each of the terminal devices.
The method according to any one of claims 3 to 5, wherein the determining, by the network device, the first to-be-transmitted Bitmap as the first Bitmap comprises:

Determining, by the network device, whether the first to-be-sent Bitmap will cause a false positive according to at least the receiving situation of the data sent by the at least one terminal device and the first hash function set;

The network device determines the first to-be-transmitted Bitmap as the first Bitmap if the network device determines that the first to-be-transmitted Bitmap does not cause a false positive.
The method according to claim 6, wherein the network device determines, according to at least the reception status of the data sent by the at least one terminal device and the first hash function set, whether the first to-be-transmitted Bitmap is Can lead to misjudgments, including:

And in a case that the network device determines that the data sent by the N second terminal devices in the at least one terminal device is not correctly received, the network device is configured according to at least the first hash function set and the N second An identifier of each second terminal device in the terminal device, respectively calculating K 1 hash values of each second terminal device, where N is an integer greater than or equal to 1;

The network device determines whether the target of the second terminal device the N second terminal device, the first transmission to be in Bitmap, the target position and K 1 of the second terminal device hash values corresponding to The bit values are all the first value;

If the target second terminal device exists, the network device determines that the first to-be-sent Bitmap causes a misjudgment;

If the target second terminal device does not exist, the network device determines that the first to-be-transmitted Bitmap does not cause a false positive.
The method according to any one of claims 3 to 7, wherein the network device sends an acknowledgement message to the at least one terminal device according to the receiving condition of the data sent by the at least one terminal device, including:

The network device sends the acknowledgement message to the at least one terminal device, where the acknowledgement message includes function set indication information, and the function set indication information is used to indicate an identifier of the first hash function set.
The method according to claim 6 or 7, wherein in the case that the network device determines that the first to-be-transmitted Bitmap causes a false positive, the compression indication information is used to indicate that the first Bitmap is not Compress the Bitmap.
The method according to claim 3, wherein the first to-be-transmitted Bitmap carries negative acknowledgement NACK information sent by the network device to N second terminal devices in the at least one terminal device, the network device is not correctly receiving the N data sent by the second terminal device, N being an integer greater than or equal to 1, Bitmap K corresponding to each of the second terminal device hash value for the first one to be sent The bit values of the positions are all the first values.
A method for confirming unauthorized data transmission, comprising:

The third terminal device sends data to the network device by using an unlicensed resource;

Receiving, by the third terminal device, an acknowledgement message sent by the network device according to the receiving situation of data sent by the at least one terminal device, where the at least one terminal device includes the third terminal device, and the acknowledgement message includes a first bit table Bitmap and compression indication information, wherein the first Bitmap is used to indicate whether the data sent by the at least one terminal device is correctly received, and the compression indication information is used to indicate whether the first Bitmap is a compressed Bitmap, if The bit included in the first Bitmap is not a compressed Bitmap, and each bit in the first Bitmap corresponds to at most one terminal device. If the first Bitmap is a compressed Bitmap, one bit in the first Bitmap corresponds to multiple terminals. a device, and/or a plurality of bits in the first Bitmap corresponding to one terminal device;

The third terminal device determines, according to the acknowledgement message, whether data sent by the third terminal device is correctly received by the network device.
The method according to claim 11, wherein the compression indication information is a radio network temporary identifier RNTI or a group identifier of a terminal device group corresponding to the at least one terminal device.
The method according to claim 11 or 12, wherein the first Bitmap carries acknowledgement ACK information sent by the network device to M first terminal devices in the at least one terminal device, the network The device correctly receives the data sent by the M first terminal devices, where M is an integer greater than or equal to 1;

Determining, by the third terminal device, whether the data sent by the third terminal device is correctly received by the network device according to the first Bitmap, including:

The third terminal of the first device determines Bitmap, the K bit positions with the third terminal device 1 corresponding hash value are a first value if the value, K 1 is greater than or equal to 1 Integer

K bit positions if the third terminal apparatus and a corresponding hash values are the values of the first value, determining the third data transmitted from the third terminal device by the network terminal device The device receives correctly;

If the K value of the bit position of the third terminal device and a corresponding hash values are not the first value, the third terminal apparatus determines the third terminal device transmitting the data was not The network device is correctly received.
The method according to claim 13, wherein, in determining the first Bitmap the third terminal device, the K bit position of the third terminal device 1 corresponding hash value whether the value of Before the first value, the method further includes:

The third terminal device according to at least a first hash function set identifier, and the third terminal device, the third terminal apparatus calculates K 1 hash values, hash function of the first set comprises K 1 Hash function; or

The network device receiving the K transmitted from the third terminal device 1 of the third terminal device hash values.
The method according to claim 14, wherein the third terminal device receives an acknowledgement message sent by the network device according to the reception status of the data sent by the at least one terminal device, including:

Receiving, by the third terminal device, the acknowledgement message sent by the network device, where the acknowledgement message includes function indication information, where the function set indication information is used to indicate an identifier of the first hash function set;

The third terminal device determines the first hash function set according to the function set indication information.
The method according to claim 11 or 12, wherein the first Bitmap carries negative acknowledgement NACK information sent by the network device to N second terminal devices in the at least one terminal device, the network The device does not correctly receive the data sent by the N second terminal devices, where N is an integer greater than or equal to 1;

Determining, by the third terminal device, whether the data sent by the third terminal device is correctly received by the network device according to the first Bitmap, including:

The third terminal of the first device determines Bitmap, the K bit positions with the third terminal device hash value corresponding to a value of a first value if both;

If the bit position of the third terminal device K 1 values are hash values corresponding to said first value, determining the third data terminal device transmits the third terminal of the device is not The network device receives correctly;

K bit positions if the third terminal apparatus and a corresponding hash value are not the values of the first value, determining the third data transmitted from the terminal device by the third terminal device The network device receives it correctly.
A data transmission device, comprising:

a receiving unit, configured to receive data that is sent by at least one terminal device by using an unlicensed resource;

a sending unit, configured to send, according to the receiving situation of the data sent by the at least one terminal device, an acknowledgement message to the at least one terminal device, where the acknowledgement message includes a first bit table Bitmap and compression indication information, where the a Bitmap is configured to indicate whether the data sent by the at least one terminal device is correctly received, where the compression indication information is used to indicate whether the first Bitmap is a compressed Bitmap, and if the first Bitmap is not a compressed Bitmap, the first Each bit in the Bitmap corresponds to at most one terminal device. If the first Bitmap is a compressed Bitmap, one bit in the first Bitmap corresponds to multiple terminal devices, and/or multiple bits exist in the first Bitmap. Corresponds to a terminal device.
The device according to claim 17, wherein the compression indication information is a radio network temporary identifier RNTI or a group identifier of a terminal device group corresponding to the at least one terminal device.
The device according to claim 17 or 18, wherein the first Bitmap is a compressed Bitmap, and the device further comprises:

a processing unit, configured to generate, according to the receiving condition of the data sent by the at least one terminal device, a first to-be-sent Bitmap based on the receiving condition of the data sent by the at least one terminal device, where the cloth is sent to the at least one terminal device The filter is defined by a first hash function set, the first hash function set includes K 1 hash functions, and K 1 is an integer greater than or equal to 1;

Determining the first to-be-transmitted Bitmap as the first Bitmap.
The device according to claim 19, wherein the first to-be-transmitted Bitmap carries acknowledgement ACK information sent by the network device to M first terminal devices of the at least one terminal device, the device the correctly received M first data transmitted from the terminal device, M being an integer greater than or equal to 1, the position of each of the K Bitmap with the first terminal device a hash value corresponding to the first to be transmitted The value of the bit is the first value.
The device according to claim 19 or 20, wherein the processing unit is further configured to:

Calculating the at least one terminal device according to the first hash function set and the identifier of each terminal device in the at least one terminal device, before the receiving, by the at least one terminal device, the data sent by the unlicensed resource K 1 hash values of each terminal device;

The sending unit is further configured to:

Transmitting K 1 hash values of each of the at least one terminal device to each of the at least one terminal device.
The device according to any one of claims 19 to 21, wherein the processing unit is specifically configured to:

Determining, according to at least the receiving condition of the data sent by the at least one terminal device and the first hash function set, whether the first to-be-transmitted Bitmap may cause a false positive;

And determining, in the case that the first to-be-transmitted Bitmap does not cause a false positive, determining the first to-be-transmitted Bitmap as the first Bitmap.
The device according to claim 22, wherein the processing unit is specifically configured to:

In the case that it is determined that the data transmitted by the N second terminal devices in the at least one terminal device is not correctly received, at least according to the first hash function set and each of the N second terminal devices An identifier of the device, respectively calculating K 1 hash values of each second terminal device, where N is an integer greater than or equal to 1;

Determining whether the presence of target second terminal of the N second terminal device, the first transmission to be in Bitmap, and bit position value K of the target second terminal device a hash value corresponding to All being the first value;

If the target second terminal device exists, determining that the first to-be-transmitted Bitmap may cause a false positive;

If the target second terminal device does not exist, determining that the first to-be-transmitted Bitmap does not cause a false positive.
The device according to claim 22 or 23, wherein the sending unit is specifically configured to:

Sending the acknowledgement message to the at least one terminal device, the acknowledgement message includes function set indication information, and the function set indication information is used to indicate an identifier of the first hash function set.
The apparatus according to claim 22 or 23, wherein in the case that the first to-be-transmitted Bitmap causes a false positive, the compression indication information is used to indicate that the first Bitmap is not a compressed Bitmap.
The device according to claim 19, wherein the first to-be-transmitted Bitmap carries negative acknowledgement NACK information sent by the network device to N second terminal devices of the at least one terminal device, the device not correctly receiving the N data sent by the second terminal device, N being an integer greater than or equal to 1, the first to be transmitted in the K Bitmap each second terminal device a hash value corresponding to The bit values of the positions are all the first values.
A data transmission device, comprising:

a sending unit, configured to send data to the network device by using an unlicensed resource;

a receiving unit, configured to receive an acknowledgement message sent by the network device according to the receiving situation of data sent by the at least one terminal device, where the at least one terminal device includes the device, where the acknowledgement message includes a first bit table Bitmap and a compression indication Information, wherein the first Bitmap is used to indicate whether the data sent by the at least one terminal device is correctly received, and the compression indication information is used to indicate whether the first Bitmap is a compressed Bitmap, if the first Bitmap is The bit included is not a compressed Bitmap, and each bit in the first Bitmap corresponds to at most one terminal device. If the first Bitmap is a compressed Bitmap, one bit in the first Bitmap corresponds to multiple terminal devices, and / Or a plurality of bits in the first Bitmap correspond to one terminal device;

And a processing unit, configured to determine, according to the acknowledgement message, whether data sent by the device is correctly received by the network device.
The device according to claim 27, wherein the compression indication information is a radio network temporary identifier RNTI or a group identifier of a terminal device group corresponding to the at least one terminal device.
The device according to claim 27 or 28, wherein the first Bitmap carries acknowledgement ACK information sent by the network device to M first terminal devices of the at least one terminal device, the network The device correctly receives the data sent by the M first terminal devices, where M is an integer greater than or equal to 1;

The processing unit is specifically configured to:

Determining, in the first Bitmap, whether the value of the bit corresponding to the K 1 hash value of the device is a first value, and K 1 is an integer greater than or equal to 1;

If the values of both the first value and the bit position corresponding to the hash values K 1 of the apparatus, the apparatus determines the data transmission is correctly received by the network device;

If the K bit positions of the device 1 corresponding hash values are not the values of the first value, determining said data transmitting means is not correctly received by the network device.
The apparatus according to claim 29, wherein before determining whether the bit value of the position corresponding to the K 1 hash values of the device is the first value in the first Bitmap, The processing unit is also used to:

Calculating K 1 hash values of the device according to at least a first hash function set and an identifier of the device, the first hash function set including K 1 hash functions; or

The receiving unit is further configured to:

Receiving K 1 hash values of the device sent by the network device.
The device according to claim 30, wherein the receiving unit is specifically configured to:

Receiving, by the network device, the acknowledgement message, where the acknowledgement message includes function set indication information, where the function set indication information is used to indicate an identifier of the first hash function set;

The processing unit is specifically configured to:

Determining the first hash function set according to the function set indication information.
The apparatus according to claim 27 or 28, wherein the first Bitmap carries negative acknowledgement NACK information sent by the network device to N second terminal devices of the at least one terminal device, the network The device does not correctly receive the data sent by the N second terminal devices, where N is an integer greater than or equal to 1;

The processing unit is specifically configured to:

Determining, in the first Bitmap, whether the value of the bit corresponding to the K 1 hash value of the device is a first value;

If the value of K 1 and bit position corresponding to the hash values are the means of the first value, determining said data transmitting means is not correctly received by the network device;

If the K bit positions of the device 1 corresponding hash values are not the values of the first value, determining said data transmitting means to said network device is correctly received.
The method or apparatus according to any one of claims 1 to 32, wherein the acknowledgement message sent by the network device to the at least one terminal device is a group of common downlink control information G-DCI.
The method or apparatus according to claim 33, wherein said at least one terminal device belongs to at least two terminal device groups.