WO2018201468A1

WO2018201468A1 - Method and apparatus for sending and receiving feedback information, and communication system

Info

Publication number: WO2018201468A1
Application number: PCT/CN2017/083296
Authority: WO
Inventors: 张健; 王昕�; 周华
Original assignee: 富士通株式会社; 张健; 王昕�; 周华
Priority date: 2017-05-05
Filing date: 2017-05-05
Publication date: 2018-11-08

Abstract

A method and apparatus for sending and receiving feedback information, and a communication system. The method comprises: receiving data sent by a user equipment by means of scheduling-free transmission; determining resource position information about the data and/or a hybrid automatic repeat request process number of the data; and explicitly or implicitly sending, to the user equipment, the resource position information and/or the hybrid automatic repeat request process number, and feedback information corresponding to the data. Thus, a correlation can be established between transmitted data and the feedback information in uplink grant signaling, and multiple HARQ processes can be supported in scheduling-free transmission.

Description

Method and device for transmitting and receiving feedback information, and communication system

Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a method and device for transmitting and receiving feedback information, and a communication system.

Background technique

In the Long Term Evolution (LTE) system, the user equipment waits for feedback from the network device (for example, the base station) in the subframe n+4 after the physical uplink shared channel (PUSCH) transmission is initiated in the subframe n. ACK/NACK information. If a NACK is received, the user equipment initiates a retransmission in subframe n+8.

The ACK/NACK information may be transmitted through a Physical Hybrid Automation Repeat Request Indicator Channel (PHICH) or a Physical Downlink Control Channel (PDCCH). More specifically, The indication may be indicated by PDCCH format 0 or information called an uplink grant (UL grant).

For example, if the new data indicator (NDI, New Data Indicator) field in the UL grant changes, it indicates that a new transport block (TB) is dispatched (equivalent to ACK), and if the NDI field is unchanged, it indicates that the retransmission is scheduled. (equivalent to NACK). The user equipment does not have to wait for the ACK/NACK feedback of the previous TB to receive a new TB transmission, but can initiate up to 8 parallel data transmissions, that is, LTE can support up to 8 hybrid automatic repeat request (HARQ) processes. .

In the LTE system, when the base station uses the UL grant to schedule retransmission, it always maintains a fixed timing relationship with the previous transmission, and the user equipment can know which TB in the HARQ process needs to be retransmitted according to the timing relationship, and accordingly, the base station Soft merges are also performed for the initial and retransmissions belonging to the same HARQ process. Since the UL grant has a fixed timing with the previous transmission, multiple uplink HARQ processes can be well supported in LTE.

It should be noted that the above description of the technical background is only for the purpose of facilitating a clear and complete description of the technical solutions of the present invention, and is convenient for understanding by those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these aspects are set forth in the background section of the present invention.

Summary of the invention

However, the inventors have found that in the fifth generation (5G) communication system, an uplink grant-free transmission is introduced for services such as URLLC and mMTC. Compared with the grant-based transmission in LTE, the grant-free transmission does not need to initiate a resource request to the base station when the user equipment has data, nor does it need to receive the scheduling signaling of the base station, but initiates data transmission immediately. Grant-free transmission can reduce air interface delay and save signaling overhead. At the same time, 5G systems also strive to support more flexible HARQ processes, meaning that the UL grant does not have to maintain a fixed timing relationship with the previous transmission. Therefore, in grant-free transmission, new methods are needed to support multiple HARQ processes.

Embodiments of the present invention provide a method, an apparatus, and a communication system for transmitting and receiving feedback information. The network device explicitly or implicitly transmits resource location information and/or hybrid automatic repeat request process number of the data to the user equipment, and feedback information corresponding to the data; thereby, the transmitted data and the uplink grant signaling The feedback information can establish a correspondence and can support multiple HARQ processes in the unscheduled transmission.

According to a first aspect of the present invention, a method for sending feedback information is provided, which supports multiple hybrid automatic repeat request processes in an unscheduled transmission, the method comprising:

Receiving data sent by the user equipment through the unscheduled transmission mode;

Determining resource location information for the data and/or a hybrid automatic repeat request process number of the data;

The resource location information and/or the hybrid automatic repeat request process number and the feedback information corresponding to the data are sent to the user equipment explicitly or implicitly.

According to a second aspect of the present invention, a device for transmitting feedback information is provided, which supports a plurality of hybrid automatic repeat request processes in an unscheduled transmission, the device comprising:

a data receiving unit, which receives data sent by the user equipment by using a schedule-free transmission manner;

An information determining unit that determines resource location information of the data and/or a hybrid automatic repeat request process number of the data;

And an information sending unit that explicitly or implicitly transmits the resource location information and/or the hybrid automatic repeat request process number and the feedback information corresponding to the data to the user equipment.

According to a third aspect of the embodiments of the present invention, a method for receiving feedback information is provided, which supports multiple hybrid automatic repeat request processes in an unscheduled transmission, and the method includes:

Sending data to the network device through a schedule-free transmission;

Receiving resource location information of the data that is explicitly or implicitly transmitted by the network device and/or a hybrid automatic repeat request process number of the data, and feedback information corresponding to the data.

According to a fourth aspect of the embodiments of the present invention, there is provided a receiving apparatus for feedback information, which supports a plurality of hybrid automatic repeat request processes in a schedule-free transmission, the apparatus comprising:

a data sending unit that transmits data to the network device through a schedule-free transmission;

An information receiving unit that receives resource location information of the data that is explicitly or implicitly transmitted by the network device and/or a hybrid automatic repeat request process number of the data, and feedback information corresponding to the data.

According to a fifth aspect of the embodiments of the present invention, a communication system is provided, including:

a network device comprising the transmitting device of the feedback information as described in the second aspect;

User equipment comprising receiving means for feedback information as described in the fourth aspect.

The beneficial effects of the embodiment of the present invention are: the network device explicitly or implicitly transmits the resource location information of the data and/or the hybrid automatic repeat request process number to the user equipment, and the feedback information corresponding to the data; The transmitted data and the feedback information in the uplink grant signaling can establish a correspondence relationship, and can support multiple HARQ processes in the unscheduled transmission.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the drawings, in which <RTIgt; It should be understood that the embodiments of the invention are not limited in scope. The embodiments of the present invention include many variations, modifications, and equivalents within the scope of the appended claims.

Features described and/or illustrated with respect to one embodiment may be used in one or more other embodiments in the same or similar manner, in combination with, or in place of, features in other embodiments. .

It should be emphasized that the term "comprising" or "comprises" or "comprising" or "comprising" or "comprising" or "comprising" or "comprises"

DRAWINGS

Elements and features described in one of the figures or one embodiment of the embodiments of the invention may be combined with elements and features illustrated in one or more other figures or embodiments. In the accompanying drawings, like reference numerals refer to the

1 is a schematic diagram of a communication system according to an embodiment of the present invention;

2 is a diagram showing an example in which the data transmitted during the schedule-free transmission and the feedback information in the uplink grant signaling cannot correspond;

3 is a schematic diagram of a method for sending feedback information according to an embodiment of the present invention;

4 is a schematic diagram of a method for receiving feedback information according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a method for transmitting and receiving feedback information according to an embodiment of the present invention; FIG.

6 is a diagram showing an example of resource location information according to an embodiment of the present invention;

FIG. 7 is another exemplary diagram of resource location information according to an embodiment of the present invention; FIG.

FIG. 8 is a diagram showing an example of repeated transmission of data according to an embodiment of the present invention; FIG.

FIG. 9 is a diagram showing an example of data transmission using a HARQ process number according to an embodiment of the present invention; FIG.

FIG. 10 is a diagram showing an example of defining an unscheduled transmission ID according to an embodiment of the present invention; FIG.

11 is a diagram showing an example of implicitly transmitting HARQ process numbers using different modulation symbols according to an embodiment of the present invention;

FIG. 12 is a diagram showing an example of a blind detection modulation symbol according to an embodiment of the present invention; FIG.

FIG. 13 is a diagram showing an example of repeated transmission of data according to an embodiment of the present invention; FIG.

FIG. 14 is a schematic diagram of an apparatus for transmitting feedback information according to an embodiment of the present invention; FIG.

FIG. 15 is a schematic diagram of an apparatus for receiving feedback information according to an embodiment of the present invention; FIG.

16 is a schematic diagram of a network device according to an embodiment of the present invention;

FIG. 17 is a schematic diagram of a user equipment according to an embodiment of the present invention.

detailed description

The foregoing and other features of the present invention will be apparent from the The specific embodiments of the present invention are disclosed in the specification and the drawings, which are illustrated in the embodiment of the invention The invention includes all modifications, variations and equivalents falling within the scope of the appended claims.

In the embodiment of the present invention, the terms "first", "second", etc. are used to distinguish different elements from the title, but do not indicate the spatial arrangement or chronological order of the elements, and these elements should not be used by these terms. Limited. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "comprising," "having," or "an"

In the embodiments of the present invention, the singular forms "a", "the", "the", "the" and "the" It is to be understood that the singular In addition, the term "according to" should be understood To "at least in part", the term "based on" should be understood to mean "based at least in part on" unless the context clearly dictates otherwise.

In the embodiment of the present invention, the term "communication network" or "wireless communication network" may refer to a network that conforms to any communication standard such as Long Term Evolution (LTE), Enhanced Long Term Evolution (LTE-A, LTE- Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed Packet Access (HSPA), and the like.

Moreover, the communication between devices in the communication system may be performed according to any phase of the communication protocol, and may include, for example but not limited to, the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and future. 5G, New Radio (NR), etc., and/or other communication protocols currently known or to be developed in the future.

In the embodiment of the present invention, the term "network device" refers to, for example, a device in a communication system that accesses a terminal device to a communication network and provides a service for the terminal device. The network device may include, but is not limited to, a device: a base station (BS, a base station), an access point (AP, an Access Point), a transmission and reception point (TRP), a broadcast transmitter, and a mobility management entity (MME, Mobile). Management Entity), gateway, server, Radio Network Controller (RNC), Base Station Controller (BSC), and so on.

The base station may include, but is not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), and a 5G base station (gNB), and the like, and may further include a Remote Radio Head (RRH). , Remote Radio Unit (RRU), relay or low power node (eg femto, pico, etc.). And the term "base station" may include some or all of their functions, and each base station may provide communication coverage for a particular geographic area. The term "cell" can refer to a base station and/or its coverage area, depending on the context in which the term is used.

In the embodiment of the present invention, the term "user equipment" (UE) or "Terminal Equipment" (TE) refers to, for example, a device that accesses a communication network through a network device and receives a network service. The user equipment may be fixed or mobile, and may also be referred to as a mobile station (MS, Mobile Station), a terminal, a subscriber station (SS, Subscriber Station), an access terminal (AT, Access Terminal), a station, and the like.

The user equipment may include, but is not limited to, a device: a cellular phone (Cellular Phone), a personal digital assistant (PDA, Personal Digital Assistant), a wireless modem, a wireless communication device, and a handheld device. Equipment, machine type communication equipment, laptop computers, cordless phones, smart phones, smart watches, digital cameras, and the like.

For example, in a scenario such as the Internet of Things (IoT), the user equipment may also be a machine or device that performs monitoring or measurement, and may include, but is not limited to, a Machine Type Communication (MTC) terminal, In-vehicle communication terminal, device to device (D2D, Device to Device) terminal, machine to machine (M2M, Machine to Machine) terminal, and the like.

The scenario of the embodiment of the present invention is described below by way of example, but the present invention is not limited thereto.

1 is a schematic diagram of a communication system according to an embodiment of the present invention, schematically illustrating a case where a user equipment and a network device are taken as an example. As shown in FIG. 1, the communication system 100 may include a network device 101 and a user equipment 102 (for simplicity) For example, FIG. 1 illustrates only one user equipment and one network device as an example, but the present invention is not limited thereto.

In the embodiment of the present invention, an existing service or a service that can be implemented in the future can be performed between the network device 101 and the user equipment 102. For example, these services may include, but are not limited to, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and high reliability low latency communication (URLLC, Ultra-Reliable and Low). -Latency Communication), and so on.

FIG. 2 is a diagram showing an example in which the data transmitted during the schedule-free transmission and the feedback information in the uplink grant signaling cannot correspond. As shown in FIG. 2, the user equipment selects one resource block (RB, Resource Block) to transmit TB1, that is, a HARQ process is started. Under the condition that multiple HARQ processes are supported, the user equipment may initiate a new HARQ process before receiving the uplink grant UL grant for TB1. The uplink grant UL grant in Figure 2 is used to schedule retransmission of a certain TB or to schedule new data transmission. Before receiving the uplink grant, the user equipment has new data arriving, so a new data transmission is initiated, that is, TB2 is sent, and TB2 belongs to a new HARQ process.

However, the problem arises when the user equipment receives the upstream grant. After the user equipment receives the uplink authorization, the user equipment cannot know whether the uplink authorization is for TB1 or TB2 because the uplink authorization does not have a fixed timing relationship with the previous data transmission. Similar ambiguities arise when a network device misses a TB. Therefore, when the NDI in the uplink grant changes, the user equipment cannot know which TB is correctly transmitted. When the NDI field is unchanged, the user equipment cannot know which TB to retransmit.

The embodiments of the present invention will be described in detail below by taking gNB and UE as examples.

In addition, the physical downlink control channel, the physical downlink shared channel, and the physical uplink sharing in the embodiment of the present invention A channel or the like should be widely understood as a channel between a transmitting end and a receiving end, but is not limited to a PDCCH, a PHICH, a PDSCH, or a PUCCH defined in an LTE system, and may be, for example, an enhanced e-PDCCH, an e-PHICH, or an e-PDCCH. PUSCH or e-PUCCH; or may be an edge link control channel or an edge link data channel in a D2D scenario.

Example 1

The embodiment of the invention provides a method for transmitting and receiving feedback information, which supports multiple HARQ processes in the unscheduled transmission. FIG. 3 is a schematic diagram of a method for transmitting feedback information according to an embodiment of the present invention, which is described from the network device side. As shown in FIG. 3, the method includes:

Step 301: The network device receives data sent by the user equipment by using a scheduling-free transmission manner.

Step 302: The network device determines resource location information of the data and/or a hybrid automatic repeat request process number of the data;

Step 303: The network device sends the resource location information and/or the hybrid automatic repeat request process number, and the feedback information corresponding to the data, to the user equipment, either explicitly or implicitly.

In this embodiment, the resource location information may be offset information based on a Transmission Time Interval (TTI) of the feedback information. The transmission time interval (TTI) may include any one of the following: a slot, a subframe, a frame, a time unit that is shorter than a time slot, that is, a mini-slot; The invention is not limited thereto, and may be other time units.

The present invention will be described below by taking a time slot as an example.

FIG. 4 is a schematic diagram of a method for receiving feedback information according to an embodiment of the present invention, which is described from the user equipment side. As shown in FIG. 4, the method includes:

Step 401: The user equipment sends data to the network device by using a scheduling-free transmission manner;

Step 402: The user equipment receives resource location information of the data that is sent by the network device explicitly or implicitly, and/or a hybrid automatic repeat request process number of the data, and feedback information corresponding to the data.

For example, the resource location information is a sequence number of the data in a time-frequency grid based on a transmission time interval in which the feedback information is transmitted; the time-frequency grid includes the user equipment from a time domain. Transmitting the data to a plurality of transmission time intervals (e.g., a maximum range of TTI) at which the feedback information is received, including a total bandwidth configured for the unscheduled transmission on a frequency domain.

For details on the resource location information of the present invention, refer to the content of the following embodiment 2. It is worth noting that The embodiment 2 only schematically illustrates the resource location information of the embodiment of the present invention, but the present invention is not limited thereto, and other forms may be employed, for example.

FIG. 5 is a schematic diagram of a method for transmitting and receiving feedback information according to an embodiment of the present invention, which is further described from both sides of a network device and a user equipment. As shown in FIG. 5, the method includes:

Step 501: The user equipment sends data to the network device by using a non-scheduled transmission mode.

Step 502: The network device determines resource location information of the data and/or a hybrid automatic repeat request process number of the data.

In an embodiment, the network device may determine the resource location information of the data according to the time and frequency of receiving the data. For details, refer to Embodiment 2 to be described later. In another embodiment, the Demodulation Reference Signal (DMRS) corresponding to the data may implicitly carry the HARQ process ID corresponding to the data, so that the network device may determine by blind detection. For details of the HARQ process number of the data, refer to Embodiment 4 to be described later.

Step 503: The network device determines feedback information corresponding to the data; for example, NACK or ACK, but the invention is not limited thereto.

Step 504: The network device explicitly or implicitly sends the resource location information and/or the hybrid automatic repeat request process number to the user equipment, and feedback information corresponding to the data.

In an embodiment, the network device may explicitly send the resource location information and the feedback information through a control channel (eg, PDCCH, PHICH, etc., but the present invention is not limited thereto); for details, refer to Embodiment 2 to be described later. . In another embodiment, the network device may explicitly send the feedback information through a control channel, and implicitly scramble the Cyclic Redundancy Check (CRC) code of the control channel, implicitly The resource location information is sent. For details, refer to Embodiment 3 to be described later. In another embodiment, the network device may explicitly send the HARQ process ID and the feedback information through a control channel; for details, refer to Embodiment 4 to be described later. However, the present invention is not limited thereto, and a specific embodiment may be determined according to actual conditions.

It should be noted that the above embodiments of FIG. 3 to FIG. 5 only schematically illustrate the embodiments of the present invention, but the present invention is not limited thereto. For example, the order of execution between the various steps can be appropriately adjusted, and other steps can be added or some of the steps can be reduced. Those skilled in the art can appropriately adapt according to the above, and are not limited to the above description of FIGS. 3 to 5.

It can be seen from the foregoing embodiment that the network device sends the resource location information of the data to the user equipment explicitly or implicitly. The information and/or the hybrid automatic repeat request process number, and the feedback information corresponding to the data; thereby, the transmitted data and the feedback information in the uplink grant signaling can establish a correspondence relationship, and can support in the unscheduled transmission. Multiple HARQ processes.

Example 2

This embodiment describes the resource location information for explicitly transmitting data on the basis of the first embodiment.

In this embodiment, when the user equipment initiates the uplink data transmission, the user equipment receives the corresponding uplink grant signaling (notifying the data transmission success or retransmitting the data, which is equivalent to indicating the ACK/NACK of the data. At the moment, there will be a maximum time interval between the two, that is, how often the uplink grant is received in the worst case.

For example, with the maximum time interval as the horizontal axis and the configured total bandwidth of the unscheduled transmission resources as the vertical axis, the grid can be divided in the matrix window surrounded by the two, and the division manner is TTI in the time direction. The granularity is the granularity of the bandwidth actually occupied by each unscheduled transmission in the frequency direction. Therefore, one grid corresponds to all the time-frequency resources occupied by one unscheduled transmission.

FIG. 6 is a schematic diagram of resource location information according to an embodiment of the present invention. As shown in FIG. 6, for example, a network device configures a user equipment to perform unscheduled transmission in a range of four RBs, and the user equipment selects one RB to transmit each time. The scheduling unit is a slot slot.

It is assumed that starting from the initiation of the TB transmission by the user equipment, up to 4 time slots can be experienced until the corresponding uplink scheduling is received, then the rectangular window size is 4 time slots in the time domain and 4 RBs in the frequency domain, corresponding to each grid. One RB and one time slot are the time-frequency resources occupied by each TB transmission. The grids within the rectangular window can be numbered such that each grid has a unique number.

For example, inside a rectangular window, the numbering can be performed in the order of increasing frequency first and then decreasing time. More specifically, starting from the latest time slot in the rectangular window, the number is first incremented in the frequency increment direction, and after reaching the highest frequency, it moves to the previous time slot in the opposite direction of the time axis, and then continues to be numbered in the frequency increment direction. When the network device sends or the user equipment receives the uplink grant, the rectangular window slides to a position aligned with the previous time slot of the uplink grant.

As shown in FIG. 6, the transmitted TB will be corresponding to a grid number in the matrix window, and the network device can send the number to the user equipment by using uplink authorization signaling, and the user equipment can know which one is for the uplink authorization. TB. The sliding window is visible to both network devices and user devices, so both parties can locate the same resources and TBs by grid number.

As shown in FIG. 6, if the first uplink grant is for TB1, the network device can indicate the number 15 in the uplink grant, and the user equipment receives the uplink grant, and can know that it should be associated with TB1. If the first upstream grant is for TB2, the network device feeds back number 7. At the second uplink grant transmission and reception time, the rectangular window slides to the previous time slot of the second uplink grant, and TB2 corresponds to the grid number 11. The time interval from TB1 to the second uplink grant exceeds the maximum time interval for the uplink grant, and TB1 does not fall into the rectangular window. The uplink grant cannot be for TB1.

FIG. 7 is another exemplary diagram of resource location information according to an embodiment of the present invention. As shown in FIG. 7, it is assumed that a user equipment transmits a TB in a time slot n, and if the base station can support the base station in the time slot n, the corresponding TB is returned through the uplink authorization. The new transmit/retransmit scheduling signaling (ACK/NACK), then the matrix window size should be increased by 1 slot length and should be slid to align with the slot in which the upstream grant is located.

In this embodiment, the resource location information may be explicitly sent to the user equipment through a control channel. Assume that the rectangular window contains M rasters, which can be used in uplink authorization signaling.

Bits are positioned on a particular grid. The NDI field in the uplink grant can be used to indicate ACK/NACK. When the NDI changes, it indicates that the feedback is ACK information, and the new data transmission can be scheduled at the same time, which is equivalent to switching the user equipment from the unscheduled transmission mode to the scheduling-based transmission mode. When the NDI is unchanged, it indicates that the NACK information is fed back, and the user equipment can be scheduled to retransmit the TB that fails to be decoded. In this case, the initial transmission of the user equipment is an unscheduled transmission, and the retransmission is based on the scheduled transmission.

In this embodiment, in a case where the data is repeatedly transmitted multiple times, one or more resource locations of the data in the multiple repeated transmission may be sent to the user equipment. For example, when a user equipment transmits a certain TB, repeated transmissions may be performed to increase the probability of correct decoding.

FIG. 8 is a diagram showing an example of repeated transmission of data according to an embodiment of the present invention. As shown in FIG. 8, each TB is repeatedly transmitted four times. The above indication of the location of the resource can still be used. In the uplink grant signaling, the location of the resource that occurs in any one of the multiple repeat transmissions may be indicated. For example, as shown in FIG. 8, the uplink grants all indicate the smallest grid number occupied by the repeated transmission.

It is worth noting that the total number of rasters in a rectangular window may not be equal to the number of HARQ processes. The user equipment can maintain the correspondence between the grid number and the HARQ process ID. Assuming that each HARQ process corresponds to a buffer buffer, each raster number received by the user equipment will correspond to a cache of a HARQ process. The usage rules of the HARQ cache may be predefined. For example, the user equipment cyclically uses the cache of the HARQ process according to the HARQ process number incrementing sequence. When a cache of a certain HARQ process is occupied, the cache may be skipped. Use the next available HARQ process cache. In this way, the network device can notify the resource location of the corresponding TB only in the uplink grant, and the HARQ process ID and cache usage can be maintained by the user equipment.

In this embodiment, the network device may further send the HARQ process ID corresponding to the data to the user equipment. For example, the resource location and the HARQ process number are both notified to the user equipment in the uplink grant. For the convenience of the following description, the uplink grant of this format may be defined as Downlink Control Information (DCI) format 0A.

For example, the uplink device can always include the resource location and the HARQ process ID field. That is, the network device always uses the DCI format 0A for ACK/NACK feedback, and the user equipment will always blindly check the DCI format 0A, and use it as a new transmission/ Retransmission schedule.

For another example, for initial transmission of the data, the resource location information and the hybrid automatic repeat request process number are indicated; for subsequent retransmission of the data, the hybrid automatic repeat request process number is indicated. That is, the DCI format 0A may be fed back only for the TB of the first unscheduled transmission, which is equivalent to assigning the HARQ process number to the TB, so that for the retransmission scheduling of the TB, the network device may use only the HARQ process number. The uplink grant, which is represented as DCI format 0, has fewer HARQ process number fields than DCI format 0A, thus saving signaling overhead. On the user equipment side, the user equipment performs blind detection on the DCI format 0A only after transmitting a certain TB in the unscheduled transmission mode. At the same time, the user equipment always blindly checks the DCI format 0, so that it can be timely informed whether it is switched to the scheduled transmission mode. Or being scheduled to retransmit a TB.

FIG. 9 is a diagram showing an example of data transmission using a HARQ process number according to an embodiment of the present invention. As shown in Figure 9, the user equipment receives the uplink grant and is scheduled to retransmit TB1. After that, the user equipment will blindly check DCI format0, because the subsequent scheduling of TB1 will be transmitted in the form of DCI format 0; when new data arrives, the user The device initiates the TB2 transmission in a non-scheduled transmission mode. After that, the user equipment will blindly check DCI format 0A and DCI format0, because the subsequent scheduling of TB2 is transmitted in the form of DCI format 0A, and the subsequent scheduling of TB1 is transmitted in the form of DCI format 0.

In some cases, for example, the same user equipment cannot transmit more than one TB at the same time, and the time-frequency two-dimensional rectangular window will be degraded into a one-dimensional rectangular window containing only the time dimension, and the resource location where the TB is located may only be indicated by The time offset (such as the time slot offset) at the time of the uplink grant is sufficient.

Example 3

Embodiments of the present invention perform resource location information for implicitly transmitting data on the basis of

Embodiments

1 and 2. Description. The content of the same as

Embodiment

1 or 2, such as the definition of resource location information, etc., will not be described again.

In this embodiment, the network device may implicitly send the resource location information to the user equipment by scrambling the control channel. For example, the network device may use the identifier information to scramble the CRC of the control channel, where the identifier information may be determined by a DMRS sequence corresponding to the user equipment and a number corresponding to the resource location.

For example, in the unscheduled transmission, different DM-RS sequences are usually configured for different user equipments in advance, and when the user equipment initiates data transmission, the DM-RSs are also transmitted at the same time. By detecting the existence of the DM-RS sequence, the network device can determine whether the user equipment is currently performing data transmission, that is, detecting user activity.

For example, it is assumed that the DM-RS sequence and the user equipment satisfy a one-to-one mapping relationship. This is for the purpose of supporting the URLLC user equipment. Since the URLLC user equipment is sensitive to the delay requirement, it is not desirable for different user equipments to use the same DM-RS. Transmission, otherwise the network device will not be able to distinguish the user equipment, and the channel estimation error at this time is likely to cause demodulation failure.

In this embodiment, if the total number of DM-RS sequences is N, a maximum of N user equipments can be supported in the resources of the unscheduled transmission. The N DM-RS sequences are numbered, and in fact the DM-RS IDs have been in one-to-one correspondence with the user IDs. Reusing the assumption that the rectangular window and the grid number are used to locate a resource of a certain TB in Embodiment 2, assuming that the rectangular window contains M resource grids (ie, numbers 1 to M), corresponding to resource positions that may appear in M TBs. The MN numbers different from each other may be constructed by using N DM-RS sequences and M resource location numbers, for example, may be defined as an unscheduled transmission ID.

FIG. 10 is a diagram showing an example of defining an unscheduled transmission ID according to an embodiment of the present invention. As shown in FIG. 10, each M consecutive numbers correspond to the same DM-RS sequence, and numbers 0 to M-1 correspond to a DM-RS sequence 0. The numbers M to 2M-1 correspond to the DM-RS sequence 1, and so on.

In this embodiment, the user equipment that can directly initiate data transmission when the data arrives can be defined as a user equipment that is scheduled to be transmitted. After the data arrives, the user equipment that needs to send a resource request and wait for the network device to schedule data transmission is called a user equipment based on scheduled transmission. An independent control resource region, which is called a non-scheduled control resource region, may be configured for the user equipment that is not scheduled to be transmitted. All the user equipments that are not scheduled to be transmitted are blindly detected in the PDCCH. An additional control resource region, which is called a scheduling-based control resource region, may be separately configured for the user equipment based on the scheduled transmission, and all the user equipments based on the scheduled transmission blindly check the PDCCH in the scheduling-based control resource region. The two regions occupy physical resources that do not coincide with each other in time and frequency.

In this embodiment, the PDCCH transmitted in the scheduling-free control resource region may be scrambled using the previously defined unscheduled transmission ID. The PDCCH transmitted in the scheduling-based control resource region is scrambled using the UE ID (such as C-RNTI, etc.). For user equipment that is scheduled to be transmitted without delay, the user equipment needs to blindly check the PDCCH (including uplink grant).

It is worth noting that the user equipment needs to perform M CRC descrambling attempts when determining whether the PDCCH CRC is correct. Taking the unscheduled user equipment with the configured DM-RS sequence as n as an example, the user equipment will try to descramble the CRC by using M unscheduled transmission IDs of the number i∈[(n-1)M, nM-1]. Once a certain ID number i makes the CRC check correct, the user equipment can know that the PDCCH is a signaling sent to itself, and can know that the physical resource location number corresponding to the uplink grant for performing the new transmission/retransmission scheduling is i- nM.

Similar to the second embodiment, since the resource location has been implicitly notified to the user equipment by scrambling the CRC, the HARQ process number may not be present in the uplink authorization signaling, and the HARQ process number may be maintained only by the user equipment; The HARQ process number field is used in the uplink grant signaling to explicitly indicate the HARQ process number.

Similar to Embodiment 2, when repeated transmission is used for transmission of a certain TB, the PDCCH CRC in the unscheduled transmission control resource region can be scrambled by using the resource location of any one of the multiple repetition transmissions.

Example 4

This embodiment describes the HARQ process number implicitly carrying data on the basis of the first embodiment.

In this embodiment, the DMRS corresponding to the data may implicitly carry the HARQ process number corresponding to the data.

For example, different HARQ processes use different DMRSs. That is, different DM-RS sequences may be used for different HARQ process configurations of the user equipment, and there is a one-to-one correspondence between the two. In this way, the network device (for example, the base station) can learn the current HARQ process number by blindly checking the DM-RS sequence, and the network device can explicitly indicate the HARQ process number in the feedback uplink authorization signaling, so that the user equipment can Know which HARQ process corresponds to the current uplink grant, or which TB corresponds to.

This method can establish the association between the uplink grant and the HARQ process, but there is a problem that it is easy to consume the DM-RS sequence resources. The total number of DM-RS sequences orthogonal to each other is limited, and DM-RS resources are important for unscheduled transmission. As described in embodiment 3, orthogonal DM-RS sequences can be used to support concurrent A user equipment that is not scheduled to transmit, if multiple orthogonal DM-RS sequences are allocated for multiple HARQ processes of the same user equipment, correspondingly reduces the number of concurrent user equipments that can be accommodated.

In this embodiment, a single DM-RS sequence may be configured for each user equipment. To distinguish different HARQ processes belonging to the same user equipment, the DM-RS sequence is multiplied by different modulation symbols to form a plurality of different In the new DM-RS sequence, each modulation symbol multiplied by the DM-RS sequence corresponds to one HARQ process. Since the DM-RS sequence is multiplied by one symbol, the orthogonality of the DM-RS sequences between different users is not affected.

11 is a diagram showing an example of implicitly transmitting HARQ process numbers using different modulation symbols in accordance with an embodiment of the present invention. As shown in FIG. 11, it is assumed that the user equipment has 4 HARQ processes, and 4 modulation symbols from the QPSK constellation can be used, and each modulation symbol is associated with one HARQ process. When a certain HARQ process is transmitted, the modulation associated with it is associated with it. The symbol is multiplied to the DM-RS sequence for transmission.

In this embodiment, the network device (for example, the base station) can identify which DM-RSs are transmitted through blind detection, and need to determine which modulation symbol is carried in the DM-RS sequence, so as to be able to perform the modulation according to the HARQ process. The correspondence between the two determines the HARQ number and feeds it back to the user equipment through the uplink grant signaling.

For example, the base station may first detect which DM-RS sequences exist, and this step is the same as the base station blind check user activity in Embodiment 3. The difference is that the base station next needs to detect the modulation symbols carried by the DM-RS sequence.

Figure 12 is a diagram showing an example of a blind detection modulation symbol according to an embodiment of the present invention. As shown in FIG. 12, a network device (for example, a base station) can perform channel estimation, decoding, and recovery of data for each possible modulation symbol; according to the degree of matching of the restored data with the actual received data, the base station can determine that the DM-RS sequence is carried. Which modulation symbol. In fact, the association between the TB and the HARQ process is specified by the user equipment, and the user equipment selects a modulation symbol, that is, specifies a HARQ process for the TB. After receiving the uplink grant from the base station, the user equipment learns the HARQ process ID, and the user equipment can locate a specific TB by using the number.

The method of Embodiment 4 is also applicable to the TB repeated transmission scenario. In fact, Embodiment 4 also solves the problem of the ambiguity of the base station when merging the repeated transmissions.

FIG. 13 is a diagram showing an example of repeated transmission of data according to an embodiment of the present invention. As shown in FIG. 13, the user equipment performs four repetition transmissions for each TB. The user equipment transmits TB1 and TB2 in time slot n and TB1, TB2 and a new data TB3 in time slot n+1.

Assuming that the user equipment randomly selects time-frequency resources each time the transmission is repeated, the base station can detect 3 TBs in slot n+1; but normally, the base station does not know which of the 3 TBs is associated with the previous TB1 or TB2 belongs to the same HARQ process, so the correct soft merge cannot be performed. By using the method of Embodiment 4, the base station can identify each HARQ process by detecting modulation symbols carried by the DM-RS, so that TBs belonging to the same HARQ process can be merged.

Example 5

In the embodiment 4, the network device (for example, the base station) can learn the HARQ process to which the currently demodulated TB belongs by using the blind detection, and carry the HARQ process ID in the uplink grant signaling to the user equipment. In fact, the method of Embodiment 3 can also be reused to implicitly notify the user equipment of the HARQ process number.

For example, all that needs to be changed is to replace the M resource location numbers in Embodiment 3 with the Q HARQ process numbers here. More specifically, the N DM-RS sequences and the Q HARQ process numbers are used to construct QN numbers that are different from each other, and are defined as an unscheduled transmission ID. Each Q consecutive number corresponds to the same DM-RS sequence, that is, corresponds to the same user equipment, numbers 0 to Q-1 correspond to DM-RS sequence 0, number Q to 2Q-1 corresponds to DM-RS sequence 1, and so on. The other parts of the method are the same as in the third embodiment.

For example, the network device can scramble the CRC of the control channel using the identification information. The identifier information may be determined by a demodulation reference signal sequence corresponding to the user equipment and a number corresponding to the resource location; or the identifier information may be a demodulation reference signal sequence and a location corresponding to the user equipment. The hybrid automatic repeat request process number is determined; or the identifier information may be determined by a demodulation reference signal sequence corresponding to the user equipment, a number corresponding to the resource location, and the hybrid automatic repeat request process number. However, the invention is not limited thereto.

Example 6

Embodiments of the present invention provide an apparatus for transmitting feedback information, which supports multiple HARQ processes in scheduling-free transmission. The device for transmitting the feedback information may be, for example, a network device, or may be one or some components or components configured in the network device. The same contents of the sixth embodiment and the first to fifth embodiments will not be described again.

FIG. 14 is a schematic diagram of an apparatus for transmitting feedback information according to an embodiment of the present invention. As shown in FIG. 14, the apparatus 1400 for transmitting feedback information includes:

a data receiving unit 1401, which receives data sent by the user equipment by using a schedule-free transmission manner;

An information determining unit 1402 that determines resource location information of the data and/or a hybrid automatic repeat request process number of the data;

The information sending unit 1403 explicitly or implicitly transmits the resource location information and/or the hybrid automatic repeat request process number to the user equipment, and feedback information corresponding to the data.

In this embodiment, the resource location information may be offset information based on a transmission time interval in which the feedback information is sent. For example, the resource location information is a sequence number of the data in a time-frequency grid based on a transmission time interval in which the feedback information is transmitted; the time-frequency grid includes the user equipment from a time domain. And transmitting the data to a maximum transmission time interval in which the feedback information is received, including a total bandwidth configured for the unscheduled transmission on a frequency domain.

In this embodiment, the information sending unit 1403 may further send the hybrid automatic repeat request process number corresponding to the data to the user equipment. For example, the resource location information and the hybrid automatic repeat request process number may be always indicated in the initial transmission and retransmission. For another example, for initial transmission of the data, the resource location information and the hybrid automatic repeat request process number are indicated; for subsequent retransmission of the data, the hybrid automatic repeat request process number is indicated.

In this embodiment, in a case where the data is repeatedly transmitted multiple times, one or more resource locations of the data in the multiple repeated transmission may be sent to the user equipment.

In an embodiment, the information sending unit 1403 may explicitly send the resource location information to the user equipment through a control channel; in another embodiment, the information sending unit 1403 may implicitly scramble the control channel. The resource location information is sent to the user equipment.

As shown in FIG. 14, the apparatus 1400 for transmitting feedback information may further include:

a scrambling unit 1404, which uses the identification information to scramble the cyclic redundancy check code of the control channel, where the identifier information is a demodulation reference signal sequence corresponding to the user equipment, and corresponds to the resource location The number and/or the hybrid automatic repeat request process number is determined.

In another embodiment, the demodulation reference signal corresponding to the data may implicitly carry the hybrid automatic repeat request process number corresponding to the data. As shown in FIG. 14, the apparatus 1400 for transmitting feedback information may further include:

a blind detection unit 1405, which performs blind detection on the demodulation reference signal sent by the user equipment;

The information determining unit 1402 may further determine a hybrid automatic repeat request process number corresponding to the data according to the result of the blind detection.

For example, different hybrid automatic repeat request processes may use different demodulation reference signals; or the demodulation reference signals of the user equipment are multiplied by different modulation symbols, the different modulation symbols corresponding to different hybrid automatic weights Pass the request process.

It is to be noted that the above description has been made only for the respective components or modules related to the present invention, but the present invention is not limited thereto. The device 1400 that sends the feedback information may also include other components or modules. For specific contents of these components or modules, reference may be made to related technologies.

It can be seen from the above embodiment that the network device explicitly or implicitly transmits the resource location information of the data and/or the hybrid automatic repeat request process number to the user equipment, and the feedback information corresponding to the data; thereby, the transmitted The feedback information in the data and uplink grant signaling can establish a correspondence, and can support multiple HARQ processes in the unscheduled transmission.

Example 7

Embodiments of the present invention provide an apparatus for receiving feedback information, which supports multiple HARQ processes in schedule-free transmission. The device for receiving the feedback information may be, for example, a user equipment, or may be some or some components or components of the user equipment. The same contents of the seventh embodiment and the first to fifth embodiments will not be described again.

FIG. 15 is a schematic diagram of an apparatus for receiving feedback information according to an embodiment of the present invention. As shown in FIG. 15, the apparatus 1500 for receiving feedback information includes:

a data transmitting unit 1501, which transmits data to the network device by using a schedule-free transmission manner;

An information receiving unit 1502, which receives resource location information of the data that is explicitly or implicitly transmitted by the network device, and/or a hybrid automatic repeat request process number of the data, and feedback information corresponding to the data .

In this embodiment, the information receiving unit 1502 may explicitly receive the resource location information through a control channel, or may implicitly receive the resource location information by descrambling the control channel.

In this embodiment, the information receiving unit 1502 may further receive the HARQ process number corresponding to the data.

As shown in FIG. 15, the apparatus 1500 for receiving feedback information may further include: a blind detection unit 1503.

For example, the blind detection unit 1503 may perform blind detection on multiple downlink control information formats; wherein, in one downlink control information format, the resource location information and the hybrid automatic repeat request process number are indicated; and another downlink control The hybrid automatic repeat request process number is indicated in the information format.

For example, the blind detection unit 1503 may perform blind detection on the control channel by using the identifier information, where the identifier information is a sequence of demodulation reference signals corresponding to the user equipment, and a number corresponding to the resource location and/or The hybrid automatic repeat request process number is determined.

In this embodiment, the demodulation reference signal corresponding to the data may implicitly carry the hybrid automatic repeat request process number corresponding to the data. Wherein, different hybrid automatic repeat request processes may use different demodulation reference signals; or the demodulation reference signals of the user equipment are multiplied by different modulation symbols, the different modulation symbols corresponding to different hybrid automatic weights Pass the request process.

It is to be noted that the above description has been made only for the respective components or modules related to the present invention, but the present invention is not limited thereto. The apparatus 1500 that receives the feedback information may also include other components or modules. For specific contents of these components or modules, reference may be made to related technologies.

Example 8

The embodiment of the present invention further provides a communication system. Referring to FIG. 1, the same content as Embodiments 1 to 7 will not be described again. In this embodiment, the communication system 100 can include:

The network device 101 is configured with the device 1400 for transmitting feedback information as described in Embodiment 6.

User equipment 102, which is configured with means 1500 for receiving feedback information as described in embodiment 7.

The embodiment of the present invention further provides a network device, which may be, for example, a base station, but the present invention is not limited thereto, and may be other network devices.

FIG. 16 is a schematic structural diagram of a network device according to an embodiment of the present invention. As shown in FIG. 16, network device 1600 can include a processor 1610 (eg, a central processing unit CPU) and a memory 1620; and a memory 1620 coupled to processor 1610. Wherein the memory 1620 can store various data; in addition, a program for storing information processing 1630, and the program 1630 is executed under the control of the processor 1610.

For example, the processor 1610 can be configured to execute the program 1630 to perform control of: receiving data transmitted by the user equipment through the unscheduled transmission; determining resource location information of the data and/or hybrid automatic repeat request of the data. a process number; and explicitly or implicitly transmitting the resource location information and/or the hybrid automatic repeat request process number to the user equipment, and feedback information corresponding to the data.

In addition, as shown in FIG. 16, the network device 1600 may further include: a transceiver 1640, an antenna 1650, and the like; wherein the functions of the foregoing components are similar to the prior art, and details are not described herein again. It should be noted that the network device 1600 does not necessarily have to include all of the components shown in FIG. 16; in addition, the network device 1600 may also include components not shown in FIG. 16, and reference may be made to the prior art.

The embodiment of the present invention further provides a user equipment, but the present invention is not limited thereto, and may be other devices.

FIG. 17 is a schematic diagram of a user equipment according to an embodiment of the present invention. As shown in FIG. 17, the user equipment 1700 can include a processor 1710 and a memory 1720; the memory 1720 stores data and programs and is coupled to the processor 1710. It should be noted that the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.

For example, the processor 1710 can be configured to perform control of transmitting data to the network device through the unscheduled transmission mode, and receiving resource location information of the data that the network device transmits explicitly or implicitly and/or The hybrid of the data automatically retransmits the request process number and the feedback information corresponding to the data.

As shown in FIG. 17, the user equipment 1700 may further include: a communication module 1730, an input unit 1740, a display 1750, and a power supply 1760. The functions of the above components are similar to those of the prior art, and are not described herein again. It should be noted that the user equipment 1700 does not have to include all the components shown in FIG. 17, and the above components are not required; in addition, the user equipment 1700 may further include components not shown in FIG. There are technologies.

The embodiment of the present invention further provides a computer readable program, wherein the program causes the network device to perform the method of transmitting feedback information according to Embodiments 1 to 5 when the program is executed in a network device.

The embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the network device to perform the method of transmitting feedback information described in Embodiments 1 to 5.

The embodiment of the present invention further provides a computer readable program, wherein the program causes the user equipment to perform the method of receiving feedback information according to Embodiments 1 to 5 when the program is executed in a user equipment.

An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer is The reading program causes the user equipment to perform the method of receiving the feedback information described in Embodiments 1 to 5.

The above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

The method/apparatus described in connection with the embodiments of the invention may be embodied directly in hardware, a software module executed by a processor, or a combination of both. For example, one or more of the functional block diagrams shown in FIG. 14 and/or one or more combinations of functional block diagrams (eg, information determining unit and information transmitting unit, etc.) may correspond to various software of a computer program flow. Modules can also correspond to individual hardware modules. These software modules may correspond to the respective steps shown in FIG. 3, respectively. These hardware modules can be implemented, for example, by curing these software modules using a Field Programmable Gate Array (FPGA).

The software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. A storage medium can be coupled to the processor to enable the processor to read information from, and write information to, the storage medium; or the storage medium can be an integral part of the processor. The processor and the storage medium can be located in an ASIC. The software module can be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if a device (such as a mobile terminal) uses a larger capacity MEGA-SIM card or a large-capacity flash memory device, the software module can be stored in the MEGA-SIM card or a large-capacity flash memory device.

One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein. An application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof. One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.

The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that A person skilled in the art can make various modifications and changes to the present invention within the scope of the present invention.

Claims

A sending device for feedback information, which supports a plurality of hybrid automatic repeat request processes in a schedule-free transmission, the device comprising:

a data receiving unit, which receives data sent by the user equipment by using a schedule-free transmission manner;

An information determining unit that determines resource location information of the data and/or a hybrid automatic repeat request process number of the data;

And an information sending unit that explicitly or implicitly transmits the resource location information and/or the hybrid automatic repeat request process number and the feedback information corresponding to the data to the user equipment.
The apparatus according to claim 1, wherein said resource location information is offset information based on a transmission time interval at which said feedback information is transmitted.
The apparatus according to claim 2, wherein said resource location information is a sequence number of said data in a time-frequency grid based on a transmission time interval in which said feedback information is transmitted; said time-frequency grid is The time domain includes a maximum transmission time interval from the sending of the data to the receipt of the feedback information by the user equipment, and includes, in the frequency domain, a total bandwidth configured for the unscheduled transmission.
The apparatus according to claim 2, wherein said information transmitting unit further transmits a hybrid automatic repeat request process number corresponding to said data to said user equipment.
The apparatus of claim 4, wherein said resource location information and said hybrid automatic repeat request process number are indicated for initial transmission of said data; said hybrid automatic for subsequent retransmission of said data The retransmission request process number is indicated.
The apparatus of claim 2, wherein one or more resource locations of the data in the plurality of repeated transmissions are transmitted to the user equipment in the event that the data is repeatedly transmitted multiple times.
The apparatus according to claim 1, wherein said information transmitting unit explicitly transmits said resource location information to said user equipment through a control channel; or said information transmitting unit implicitly scrambles a control channel The resource location information is sent to the user equipment.
The apparatus of claim 1 wherein said apparatus further comprises:

a scrambling unit that scrambles a cyclic redundancy check code of the control channel by using identifier information; wherein the identifier information is a demodulation reference signal sequence corresponding to the user equipment, and the resource location corresponds to The number and/or the hybrid automatic repeat request process number is determined.
The apparatus according to claim 1, wherein the demodulation reference signal corresponding to the data implicitly carries the hybrid automatic repeat request process number corresponding to the data.
The apparatus of claim 9, wherein the different hybrid automatic repeat request processes use different demodulation reference signals; or the demodulation reference signals of the user equipment are multiplied by different modulation symbols, the different modulations The symbols correspond to different hybrid automatic repeat request processes.
The apparatus of claim 9 wherein said apparatus further comprises:

a blind detection unit that performs blind detection on the demodulation reference signal sent by the user equipment;

The information determining unit determines a hybrid automatic repeat request process number corresponding to the data according to the result of the blind check.
A receiving device for feedback information, supporting multiple hybrid automatic repeat request processes in a schedule-free transmission, the device comprising:

a data sending unit that transmits data to the network device through a schedule-free transmission;

An information receiving unit that receives resource location information of the data that is explicitly or implicitly transmitted by the network device and/or a hybrid automatic repeat request process number of the data, and feedback information corresponding to the data.
The apparatus according to claim 12, wherein said resource location information is offset information based on a transmission time interval at which said feedback information is transmitted.
The apparatus according to claim 13, wherein said resource location information is a sequence number of said data in a time-frequency grid based on a transmission time interval in which said feedback information is transmitted; said time-frequency grid is The time domain includes a maximum transmission time interval from the sending of the data to the receipt of the feedback information by the user equipment, and includes, in the frequency domain, a total bandwidth configured for the unscheduled transmission.
The apparatus according to claim 12, wherein said information receiving unit explicitly receives said resource location information through a control channel or implicitly receives said resource location information by descrambling a control channel.
The apparatus according to claim 15, wherein said information receiving unit further receives a hybrid automatic repeat request process number corresponding to said data.
The apparatus of claim 15 wherein said apparatus further comprises:

a blind detection unit that performs blind detection on multiple downlink control information formats; wherein, in one downlink control information format, the resource location information and the hybrid automatic repeat request process number are indicated; and another downlink control information format The hybrid automatic repeat request process number is indicated;

Or performing blind detection on the control channel by using identifier information; wherein the identifier information is used by the user The demodulation reference signal sequence corresponding to the device, and the number corresponding to the resource location and/or the hybrid automatic repeat request process number are determined.
The apparatus according to claim 12, wherein the demodulation reference signal corresponding to the data implicitly carries the hybrid automatic repeat request process number corresponding to the data.
The apparatus of claim 18, wherein different hybrid automatic repeat request processes use different demodulation reference signals; or the demodulation reference signals of the user equipment are multiplied by different modulation symbols, the different modulations The symbols correspond to different hybrid automatic repeat request processes.
A communication system supporting a plurality of hybrid automatic repeat request processes in a schedule-free transmission, the communication system comprising:

a network device comprising the transmitting device of the feedback information of claim 1;

User equipment comprising the receiving device of the feedback information of claim 12.