WO2022155767A1 - Method for generating hybrid automatic repeat request (harq) feedback codebook, and communication device and readable storage medium - Google Patents

Abstract

Disclosed is a method for generating a hybrid automatic repeat request (HARQ) feedback codebook. The method is applied to a user equipment (UE) and comprises: respectively taking each serving cell as the current cell; for each current cell, respectively taking each semi-persistent scheduling (SPS) configuration as the current SPS configuration; for the current SPS configuration, respectively taking, as the current slot, a slot which corresponds to each SPS physical downlink shared channel (PDSCH) awaiting feedback, wherein the SPS PDSCH awaiting feedback comprises an SPS PDSCH satisfying a first condition, and the first condition comprises an original feedback position of the SPS PDSCH conflicting with a time-division duplex configuration; and if the current slot satisfies an exclusion condition, HARQ feedback information corresponding to the current slot not being added to a first HARQ codebook, otherwise, the HARQ feedback information corresponding to the current slot being added to the first HARQ codebook, so as to generate the first HARQ codebook. Further disclosed are a communication device and a readable storage medium.

Description

Hybrid automatic repeat request HARQ feedback codebook generation method, communication device and readable storage medium 【Technical field】

The present application relates to the field of communications, and in particular, to a method for generating a HARQ feedback codebook for hybrid automatic repeat request, a communication device, and a readable storage medium.

【Background technique】

The fifth generation mobile communication system (5G NR) includes three major application scenarios, namely Enhanced Mobile Broadband (eMBB: Enhanced Mobile Broadband), Massive Machine Type Communication (mMTC: Massive Machine Type Communication) and Low Latency and High Reliability (URLLC: Ultra-reliable low-latency communication). URLLC has two basic characteristics, namely high reliability and low delay, such as BLER performance of the order of 10 ^-5 or 10 ^-6 , and air interface transmission delay of 0.5ms or 1ms.

Semi-persistent scheduling (Semi-Persistent Scheduling, SPS) allows semi-static configuration of radio resources, and the resources are periodically allocated to user equipment (User Equipment, UE). SPS has the characteristic of "once allocation, multiple use". After the base station configures SPS resources for the UE and activates the SPS, the UE uses the SPS resources to receive or send data after each SPS period. The base station does not need to re-issue downlink control information (Downlink Control Information, DCI) for subsequent SPS resources to specify the allocated resources.

In the prior art, if the UE is configured to receive the SPS physical downlink share channel (PDSCH) at slot n, the UE will pass the physical uplink control channel (Physical uplink control channel) at slot n+k1. , PUCCH) to transmit the hybrid automatic repeat request (Hybrid automatic repeat request, HARQ) feedback signal (also referred to as HARQ-ACK) corresponding to the SPS PDSCH. Where k1 is a timing parameter, indicating a certain number of slots, which is configured by the PDSCH-to-HARQ_feedback timing indicator field in the DCI, or by the Radio Resource Control (Radio Resource Control, RRC) parameter dl-DataToUL-ACK to configure (DCI In Format1_2, the RRC parameter is dl-DataToUL-ACKForDCIFormat1_2).

Due to the "one-time allocation, multiple use" feature of SPS PDSCH, the configuration of k1 is only configured in the DCI format (format) of the activation/activation (activate) SPS PDSCH, and the rest of the SPS PDSCH follow the configuration in the activate DCI format for HARQ Feedback, that is, their k1 value is the same for each SPS PDSCH. Based on this characteristic, conflict will occur in the Time-Division Duplex (TDD) scenario. If the HARQ feedback signal responding to the SPS PDSCH happens to fall into the non-uplink slot or non-uplink symbol (symbol) of TDD , the HARQ feedback will be discarded according to the current protocol.

For example, as shown in Figure 1, it is assumed that the TDD slot is configured as 'DDDUU', where D represents the downlink (Downlink, DL), U represents the uplink (Uplink, UL), and the DCI format of the SPS PDSCH to activate (activate) indicates k1 =2, the position of the HARQ feedback signal is shown in the following figure. For the SPS PDSCH sent at DL#1, based on k1=2, the corresponding HARQ feedback signal needs to be sent at the position of DL#3, but since DL#3 is a downlink slot, the HARQ feedback signal needs to be discarded. By analogy, for the SPS PDSCH sent at DL#2 and DL#3, the corresponding HARQ feedback signal is sent at UL#1 and UL#2 respectively, and the HARQ feedback signal can be sent to the base station normally.

Discarding the HARQ feedback signal caused by the collision will affect the performance of the corresponding PDSCH, especially when the SPS PDSCH period becomes shorter and the HARQ feedback collision occurs more frequently.

[Content of the invention]

The main technical problem to be solved by this application is to provide a HARQ feedback codebook generation method, communication device and readable storage medium for hybrid automatic repeat request, which can solve the problem of resource conflict affecting PDSCH performance in the prior art.

In order to solve the above technical problems, a first aspect of the present application provides a method for generating a HARQ feedback codebook for hybrid automatic repeat request. The method is applied to the user equipment side, and the method includes: using each serving cell as a current cell; For each current cell, each semi-persistently scheduled SPS configuration is taken as the current SPS configuration; for the current SPS configuration, the time slot corresponding to each SPS physical downlink shared channel PDSCH to be fed back is taken as the current time slot, and the SPS to be fed back The PDSCH includes the SPS PDSCH that satisfies the first condition, and the first condition includes the conflict between the original feedback position of the SPS PDSCH and the time division duplex configuration; if the current timeslot satisfies the exclusion condition, the HARQ feedback information corresponding to the current timeslot is not added to the first HARQ codebook, otherwise the HARQ feedback information corresponding to the current time slot is added to the first HARQ codebook, thereby generating the first HARQ codebook.

In order to solve the above technical problems, a second aspect of the present application provides a method for generating a HARQ feedback codebook for a hybrid automatic repeat request. The method is applied to the user equipment side, and the method includes: using each serving cell as a current cell; for In each current cell, each HARQ process is regarded as the current HARQ process; if the original feedback position of the SPS PDSCH corresponding to the current HARQ process conflicts with the time division duplex configuration, the HARQ feedback information of the SPS PDSCH of the current HARQ process is added to the first HARQ process codebook, thereby generating the first HARQ codebook.

In order to solve the above technical problems, a third aspect of the present application provides a method for generating a HARQ feedback codebook for hybrid automatic repeat request. The method is applied to the user equipment side, and the method includes: using each serving cell as a current cell; For each current cell, each SPS configuration is taken as the current SPS configuration; for the current SPS configuration, the time slot corresponding to each SPS PDSCH to be fed back is taken as the current time slot; if the current time slot meets the exclusion condition, the The HARQ feedback information corresponding to the current time slot is added to the first HARQ codebook, otherwise, the HARQ feedback information corresponding to the current time slot is added to the first HARQ codebook, thereby generating the first HARQ codebook, where if the SPS PDSCH aggregation degree of the current SPS configuration is greater than 1, the HARQ feedback information corresponding to the current time slot is the overall HARQ feedback information of the aggregated at least two SPS PDSCHs.

In order to solve the above technical problems, a fourth aspect of the present application provides a method for generating a HARQ feedback codebook for hybrid automatic repeat request. The method is applied to the user equipment side, and the method includes: using each serving cell as a current cell; for For each current cell, each SPS configuration is taken as the current SPS configuration; for the current SPS configuration, the time slot corresponding to each SPS PDSCH to be fed back is taken as the current time slot; if the current time slot meets the exclusion condition, the The HARQ feedback information corresponding to the current time slot is added to the first HARQ codebook, otherwise the HARQ feedback information corresponding to the current time slot is added to the first HARQ codebook, thereby generating the first HARQ codebook; wherein the time slot corresponding to the SPS PDSCH to be fed back The time slot corresponding to the SPS PDSCH that does not have actual transmission is not included, and/or the exclusion condition includes that the SPS PDSCH corresponding to the current time slot does not have actual transmission.

In order to solve the above technical problem, a first aspect of the present application provides a communication device, the device includes a processor and a memory, the processor is connected to the memory; the processor is configured to execute instructions to implement the aforementioned method.

In order to solve the above technical problems, the present application provides a readable storage medium storing instructions, which implement the aforementioned method when the instructions are executed.

The beneficial effects of the present application are: take each serving cell as the current cell; for each current cell, take each semi-persistently scheduled SPS configuration as the current SPS configuration; for the current SPS configuration, take each SPS to be fed back The time slot corresponding to the PDSCH of the physical downlink shared channel is used as the current time slot, and the SPS PDSCH to be fed back includes the SPS PDSCH that satisfies the first condition, and the first condition includes the conflict between the original feedback position of the SPS PDSCH and the time division duplex configuration; if the current time slot satisfies the Excluding the condition, the HARQ feedback information corresponding to the current time slot is not added to the first HARQ codebook, otherwise the HARQ feedback information corresponding to the current time slot is added to the first HARQ codebook, thereby generating the first HARQ codebook. Compared with the prior art, the first HARQ codebook is generated for the collided SPS PDSCH, and at least part of the HARQ feedback signals that would otherwise be discarded due to the collision are sent to the base station, thereby improving the performance of the SPS PDSCH.

【Description of drawings】

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort. in:

1 is a schematic diagram of a conflict between the HARQ feedback signal of the SPS PDSCH and the TDD configuration in the prior art;

FIG. 2 is a schematic structural diagram of an embodiment of a wireless communication system or network of the present application;

3 is a schematic flowchart of the first embodiment of the HARQ feedback codebook generation method of the present application;

4 is a schematic flowchart of the second embodiment of the HARQ feedback codebook generation method of the present application;

5 is a schematic diagram of aggregated SPS PDSCH in the third embodiment of the HARQ feedback codebook generation method of the present application;

6 is a schematic flowchart of a fifth embodiment of a method for generating a HARQ feedback codebook of the present application;

7 is a schematic structural diagram of an embodiment of a communication device of the present application;

FIG. 8 is a schematic structural diagram of an embodiment of a readable storage medium of the present application.

【Detailed ways】

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and the following embodiments that do not conflict can be combined with each other. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

"User equipment" in this application may include or represent any portable computing device used for communication. Examples of user equipment that may be used in certain embodiments of the described devices, methods and systems may be wired or wireless devices such as mobile devices, mobile phones, terminals, smart phones, portable computing devices such as laptops , handheld devices, tablets, tablet computers, netbooks, personal digital assistants, music players, and other computing devices capable of wired or wireless communications. In addition, the user equipment may also be a reduced capability (Reduced Capability) user equipment.

2 is a wireless communication comprising a core network 102 (or telecommunications infrastructure) with multiple network nodes 104a-104m (eg, base stations gNB) with cells 106a-106m serving multiple wireless communication units 108a-108e (eg, UEs) A schematic diagram of a system or network 100 . A plurality of network nodes 104a-104m are connected to the core network 102 by links. These links may be wired or wireless (eg, radio communication links, fiber optics, etc.). Core network 102 may include multiple core network nodes, network entities, application servers, or any other network or computing device that may communicate with one or more radio access networks including multiple network nodes 104a-104m.

In this example, the network nodes 104a-104m are illustrated as base stations, which may be gNBs in a 5G network, for example but not limited to. Each of the plurality of network nodes 104a-104m (eg, base stations) has a footprint, which is schematically represented in FIG. 1 for serving one or more UEs 108a for simplicity and by way of example and not limitation The corresponding circular cells 106a-106m of -108e. UEs 108a-108e can receive services from wireless communication system 100, such as voice, video, audio, or other communication services.

The wireless communication system or network 100 may include or represent any one or more communication networks used for communication between UEs 108a-108e and other devices, content sources, or servers connected to the wireless communication system or network 100. Core network 102 may also include or represent one or more communication networks, one or more network nodes, entities, elements, application servers, servers, base stations or other links, coupled or connected to form wireless communication system or network 100 Network equipment. Links or couplings between network nodes may be wired or wireless (eg, radio communication links, fiber optics, etc.). The wireless communication system or network 100 and core network 102 may include any suitable combination of a core network and a wireless access network comprising network nodes or entities, base stations, access points, etc. that enable UEs 108a-108e, wireless communication system 100 and Communication between network nodes 104a-104m of core network 102, content sources, and/or other devices connected to system or network 100 is enabled.

An example of a wireless communication network 100 that may be used in some embodiments of the described devices, methods and systems may be at least one communication network or a combination thereof including, but not limited to, one or more wired and/or wireless telecommunications networks, a core network(s), radio access network(s), computer network(s), data communication network(s), internet, telephone network, wireless network, such as WiMAX based on the IEEE 802.11 standard by way of example only , WLAN and/or Wi-Fi network, or Internet Protocol (Internet Protocol, IP) network, packet-switched network or enhanced packet-switched network, IP Multimedia Subsystem (IP Multimedia Subsystem, IMS) network or based on wireless, cellular or satellite Technical communication networks, such as mobile networks, Global System for Mobile Communications (GSM), GPRS networks, Wideband Code Division Multiple Access (W-CDMA), CDMA2000 or LTE/Advanced LTE communication network or any 2nd, 3rd, 4th or 5th generation and beyond type of communication network etc.

In the example of FIG. 2, the wireless communication system 100 may be, by way of example only and not limited to, cyclic prefix orthogonal frequency division multiplexing (CP- 5G communication network using OFDM) technology. The downlink may include one or more communication channels for transmitting data from one or more gNBs 104a-104m to one or more UEs 108a-108e. Typically a downlink channel is a communication channel used to transmit data, eg, from gNB 104a to UE 108a.

Both the uplink and downlink for 5G networks are divided into radio frames (eg, each frame may be 10ms in length), where each frame may be divided into multiple subframes. For example, each frame may include 10 subframes of equal length, where each subframe consists of multiple time slots (eg, 2 time slots) for transmitting data. In addition to time slots, a subframe may include several additional special fields or OFDM symbols, which may include, by way of example only, downlink synchronization symbols, broadcast symbols and/or uplink reference symbols.

As shown in FIG. 3 , the first embodiment of the HARQ feedback codebook generation method of the present application includes:

S11: Take each serving cell as the current cell respectively.

The embodiments of the HARQ feedback codebook generation method of the present application are applied to the user equipment side. This embodiment is generated based on the HARQ feedback codebook of type 1. This step can also be understood as traversing each serving cell.

S12: For each current cell, use each SPS configuration as the current SPS configuration.

This step can also be understood as traversing each SPS configuration of the current cell.

S13: For the current SPS configuration, the time slot corresponding to each SPS physical downlink shared channel PDSCH to be fed back is used as the current time slot.

This step can also be understood as traversing the time slot corresponding to each SPS PDSCH to be fed back in the current SPS configuration of the current cell. The time slot corresponding to the SPS PDSCH to be fed back refers to the time slot of the SPS PDSCH to be fed back by the user equipment. Before generating the HARQ feedback codebook, the UE can count which timeslots are the timeslots corresponding to the SPS physical downlink shared channel PDSCH to be fed back (hereinafter referred to as the timeslots to be fed back) to obtain a set of timeslots to be fed back. In the traditional HARQ feedback codebook generation process based on type 1, the SPS PDSCH to be fed back does not include the conflicting SPS PDSCH.

The SPS PDSCH to be fed back may include the SPS PDSCH that satisfies the first condition. The first condition includes the conflict between the original feedback position of the SPS PDSCH and the time division duplex configuration. The original feedback position of the SPS PDSCH refers to the HARQ feedback signal that should be sent to the SPS PDSCH calculated according to the time slot corresponding to the SPS PDSCH (that is, the time slot in which the user equipment receives the SPS PDSCH) and the given k1 in the corresponding SPS configuration time domain location. If the original feedback position of a certain SPS PDSCH falls within the non-uplink slot or non-uplink symbol configured by TDD, the original feedback position of the SPS PDSCH conflicts with the time division duplex configuration. For the convenience of description, hereinafter referred to as the original feedback position and time division duplex configuration A conflicting SPS PDSCH is configured as a conflicting SPS PDSCH.

Based on the HARQ mechanism, after receiving the downlink transmission, the user equipment determines the corresponding HARQ feedback information according to the decoding situation. If it can be decoded normally, the corresponding HARQ feedback information is HARQ acknowledgement information (ACK); otherwise, the corresponding HARQ feedback information is HARQ acknowledgement information (NACK). The base station will wait for the HARQ feedback information for the SPS PDSCH from the UE within the specified period of time after sending the SPS PDSCH. If the HARQ feedback information is not received within the specified period of time, the base station will determine that the transmission failed and perform subsequent operations, such as retransmission, etc. If the actual time interval between the SPS PDSCH and its HARQ feedback information exceeds the specified duration, even if the base station receives an ACK, it will not determine that the transmission is successful. That is to say, the transmission of HARQ feedback information exceeding the specified duration cannot reduce the necessary retransmission. Optionally, the first condition may further include that the time slot corresponding to the SPS PDSCH is within a specified time window.

The specified time window may be determined based on the physical uplink control channel PUCCH or the physical uplink shared channel PUSCH (hereinafter referred to as the uplink transmission resource) used to carry the first HARQ codebook, for example, a specified number of time slots/subframes before the uplink transmission resource. as the specified time window. Alternatively, if the user equipment generates the first HARQ codebook after receiving the retransmission trigger message from the base station, a specified number of time slots/subframes after receiving the retransmission trigger message may be used as the specified time window.

If the current time slot satisfies the exclusion condition, go to S14, otherwise go to S15.

The exclusion conditions may include: the SPS PDSCH is not required to be received on the overlapping SPS PDSCH; the UE has limited capability and cannot receive multiple PDSCHs; the current SPS PDSCH conflicts with the TDD uplink slot. Optionally, the exclusion condition further includes that there is no actual transmission of the SPS PDSCH corresponding to the current time slot. If the current time slot satisfies any one of the exclusion conditions, it can be considered that the current time slot satisfies the exclusion condition.

S14: Do not add the HARQ feedback information corresponding to the current time slot into the first HARQ codebook.

Otherwise, go to S15.

S15: Add the HARQ feedback information corresponding to the current time slot into the first HARQ codebook.

Generally speaking, the HARQ feedback information corresponding to a SPS PDSCH to be fed back/time slot to be fed back is 1 bit, and its value is used to indicate whether it is ACK or NACK. 1 means NACK, 0 means ACK.

After performing S15, if the current SPS configuration of the current cell still has an unprocessed time slot to be fed back, then update the current time slot, that is, select an unprocessed time slot to be fed back as a new current time slot and repeat the above-mentioned related process. , until all the time slots to be fed back of the current SPS configuration of the current cell are traversed; then the SPS configuration can be updated until all the SPS configurations of the current cell are traversed; then the serving cell can be updated until all the serving cells are traversed.

After traversing all the time slots to be fed back, the SPS configuration and the serving cell, the obtained first HARQ codebook is the final first HARQ codebook, that is, the first HARQ codebook to be sent by the UE. Alternatively, the UE may determine whether the size of the current first HARQ codebook is larger than the available uplink resource size, and if it is larger, it directly uses the current first HARQ codebook as the final first HARQ codebook without continuing to traverse.

The user equipment may decide to send the first HARQ codebook at its own discretion, and this situation may be referred to as delaying sending the HARQ-ACK canceled due to the conflict; the user equipment may also send the first HARQ codebook after receiving the retransmission trigger signal from the base station , this situation may also be referred to as retransmission of HARQ-ACK canceled due to collision.

In the related art, the HARQ feedback of the conflicting SPS PDSCH needs to be discarded. In this embodiment, the SPS PDSCH to be fed back includes the conflicting SPS PDSCH, and the generated first HARQ codebook includes the HARQ feedback of the conflicting SPS PDSCH information, so that the HARQ feedback information that originally needs to be discarded can be sent to the base station, thereby improving the performance of the SPS PDSCH.

Optionally, the SPS PDSCH to be fed back further includes an SPS PDSCH whose original feedback position does not conflict with the time division duplex configuration, for example, an SPS PDSCH that should originally use uplink transmission resources for HARQ feedback. The chronological order of all time slots to be fed back. Finally, the user equipment sends the first HARQ codebook to the base station, that is, the finally sent HARQ-ACK is the first HARQ codebook.

Optionally, the SPS PDSCH to be fed back only includes the SPS PDSCH that satisfies the first condition, that is, the UE generates a separate HARQ feedback codebook for the conflicting SPS PDSCH. The separate HARQ feedback codebook can be sent independently, or it can be sent together with the HARQ feedback signal that should be sent (that is, the HARQ feedback signal generated for other non-conflicting SPS PDSCHs, which can also be referred to as the local HARQ feedback signal).

As shown in FIG. 4 , the second embodiment of the HARQ feedback codebook generation method of the present application is based on the first embodiment of the HARQ feedback codebook generation method of the present application, and further includes:

S16: Generate a second HARQ codebook for the SPS PDSCH whose original feedback position does not conflict with the time division duplex configuration.

S17: Combine the first HARQ codebook and the second HARQ codebook to obtain a third HARQ codebook.

The first HARQ codebook may be concatenated after the second HARQ codebook to obtain the third HARQ codebook.

S18: Send the third HARQ codebook to the base station.

In the third embodiment of the HARQ feedback codebook generation method of the present application, there may be a parameter pdsch-AggregationFactor (also called the SPS PDSCH aggregation degree, hereinafter referred to as the aggregation degree) in the SPS configuration, which is used to characterize the individual SPS PDSCH aggregation. number, the aggregated SPS PDSCH will be sent continuously in each SPS cycle. For example, if pdsch-AggregationFactor is 2, it means that two consecutive SPS PDSCHs are configured to be sent on two consecutive downlink slots in each SPS cycle. For example, as shown in Figure 5, if the SPS PDSCH is configured on DL#1 at this time, and the parameter pdsch-AggregationFactor is 2, then the transmission of an SPS PDSCH is also configured on DL#2. In the related art, the UE adds the aggregated HARQ feedback information of each PDSCH to the codebook. Still using the example in Figure 5, the UE will feed back the HARQ-ACK corresponding to the SPS PDSCH on DL#1 and DL#2 on slot n+k.

When there is a pdsch-AggregationFactor in the SPS configuration, the base station sends consecutive pdsch-AggregationFactor SPS PDSCHs each time. If the decoding of one of the at least two aggregated SPS PDSCHs fails, even if the decoding of the other SPS PDSCHs is successful, the base station may send the SPS PDSCHs in an aggregated manner again instead of sending the SPS PDSCHs in which the decoding failed separately.

Therefore, when the SPS PDSCH aggregation degree of the current SPS configuration is greater than 1, the HARQ feedback information corresponding to the current time slot is the overall HARQ feedback information of the aggregated at least two SPS PDSCHs, so as to simplify the generated HARQ codebook. The overall HARQ feedback information is determined according to the HARQ feedback information of the aggregated SPS PDSCH. If the HARQ feedback information of all SPS PDSCHs in the aggregated SPS PDSCH is ACK, the overall HARQ feedback information is ACK; otherwise, if the HARQ feedback information of any SPS PDSCH in the aggregated SPS PDSCH is NACK, the overall HARQ feedback information is NACK is NACK.

The overall HARQ feedback information may be obtained by logically calculating the HARQ feedback information of all aggregated SPS PDSCHs according to the value of the HARQ feedback information. For example, in the case of 1 for ACK and 0 for NACK, the overall HARQ feedback information can be obtained by logically ANDing the HARQ feedback information of all aggregated SPS PDSCHs; 1 for NACK, and 0 for ACK, you can The overall HARQ feedback information is obtained by performing logical OR calculation on the HARQ feedback information of all the aggregated SPS PDSCHs.

When the SPS configuration has an SPS PDSCH aggregation degree greater than 1, for a group of aggregated SPS PDSCHs, the generated HARQ codebook may only include 1-bit overall HARQ feedback information, thereby reducing the load of the generated HARQ codebook.

When the SPS PDSCH aggregation degree of the current SPS configuration is greater than 1, the SPS PDSCH to be fed back can be one of the aggregated at least two SPS PDSCHs, that is, in the process of generating the HARQ codebook, only the aggregated at least two SPS PDSCHs are selected. One of the PDSCHs performs the process of generating the HARQ codebook, thereby simplifying the generation process of the HARQ codebook. The selected SPS PDSCH may be one of fixed positions in the aggregated SPS PDSCH, such as the first or the last one. In the process of counting the SPS PDSCHs to be fed back, only one of the aggregated SPS PDSCHs can be selected to be added to the SPS PDSCH to be fed back; SPS PDSCH, in the process of traversing the time slot to be fed back, the step size is modified from 1 to pdsch-AggregationFactor.

This embodiment may be based on the traditional method for generating a HARQ feedback codebook based on type 1, or may be combined with the first embodiment of the method for generating a HARQ feedback codebook of the present application. In this case, the first condition may further include the current SPS configuration When the aggregation degree of the SPS PDSCH is greater than 1, the SPS PDSCH is one of at least two aggregated SPS PDSCHs.

In the fourth embodiment of the HARQ feedback codebook generation method of the present application, in practical applications, there may be an over-configuration of the SPS PDSCH, that is, the configured part of the SPS PDSCH does not have actual downlink transmission. In the related art, for this 'no actual transmission' SPS PDSCH (ie skipped SPS PDSCH), by default, the UE will feed back a NACK to the base station, which undoubtedly increases unnecessary signaling overhead.

Optionally, the UE may receive a notification from the base station or judge by itself to determine which SPS PDSCHs are not actually transmitted. The UE may skip these SPS PDSCHs in the process of generating the HARQ codebook. The UE can skip these SPS PDSCHs in the process of counting the SPS PDSCHs to be fed back, or add in the exclusion condition that the SPS PDSCH corresponding to the current time slot does not have actual transmission, or add an independent current time slot corresponding to the SPS PDSCH exists. The decision step of actual transmission, or exclude the HARQ process corresponding to the SPS PDSCH without actual transmission in the existing HARQ process (HARQ process).

This embodiment may be based on the traditional HARQ feedback codebook generation method based on type 1, or may be based on the first embodiment of the HARQ feedback codebook generation method in the present application. In this case, the first condition may further include that there is actual transmission of the SPS PDSCH . This embodiment may be based on the traditional type 3-based HARQ feedback codebook generation method, and in this case, the determination of whether there is actual transmission of the SPS PDSCH corresponding to the HARQ process may be added.

As shown in FIG. 6 , the fifth embodiment of the HARQ feedback codebook generation method of the present application includes:

S21: Take each serving cell as the current cell respectively.

S22: For each current cell, take each HARQ process as the current HARQ process.

S23: If the original feedback position of the SPS PDSCH corresponding to the current HARQ process conflicts with the time division duplex configuration, add the HARQ feedback information of the SPS PDSCH corresponding to the current HARQ process into the first HARQ codebook, thereby generating the first HARQ codebook.

This embodiment is based on the HARQ feedback codebook generation of type 3, and the main difference from the first embodiment of the HARQ feedback codebook generation method of the present application is to traverse the SPS PDSCH to be fed back and generate the HARQ codebook based on the HARQ process. For details and feasible extensions of this embodiment, reference may be made to the relevant description of the first embodiment of the method for generating a HARQ feedback codebook in this application.

The specific process of generating the HARQ codebook of the present application will be described below with reference to pseudo codes.

The pseudocode for generating the Type1HARQ codebook is as follows:

Let c=0,j=0

[Step a]while

(The serving cell index is less than the number of serving cells configured for the UE)

Let s=0

[Step b]while

Let n _D = 0

[Step c]while

[Step d]if{

The UE is configured in the current serving cell c, and the current SPS PDSCH configuration s is received from the slot

to the SPS PDSCH sent on slotn _D , which excludes the following scenarios:

It is not required to receive SPS PDSCH in the overlapping SPS PDSCH. The UE has limited capability and cannot receive multiple PDSCHs. The current SPS PDSCH conflicts with the TDD uplink symbol (based on the parameter tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated configuration)

in,

It is configured by pdsch-AggregationFactor in the high-level parameter sps-Config. If pdsch-AggregationFactor is not configured, the configuration in pdsch-config is used.

}

HARQ-ACK information bit corresponding to PDSCH

j=j+1;

end if

n _D =n _D +1;

end while

s=s+1;

end while

c=c+1;

end while

After finishing all the loops, we end up with

is the final HARQ codebook.

in,

Indicates the number of serving cells allocated to the UE.

Indicates the number of SPS PDSCH configurations configured for the UE by the current serving cell c.

Indicates the number of downlink slots corresponding to the SPS PDSCH for which the current SPS configuration of the current serving cell c needs to be fed back by HARQ-ACK.

s represents the SPS configuration index, which corresponds to the RRC index corresponding to the corresponding SPS PDSCH configuration.

n _D represents the index of the downlink slot (ie the current time slot) corresponding to the SPS PDSCH for which the current SPS configuration of the current serving cell c needs to be fed back by HARQ-ACK. n _D =n _D +1 means that n _D is updated to the index of the next time slot to be fed back in the set of time slots to be fed back.

j represents the index of the HARQ-ACK information bit (HARQ-ACK information bit index), and set the initial value j=0.

c represents the serving cell index, and the initial value c=0 is set; the lower the index value is, the lower the RRC index of the corresponding cell is.

Based on the embodiments of the HARQ feedback codebook generation method of the present application, the parameters and/or steps of the above pseudocode may be modified.

Based on the first embodiment of the HARQ feedback codebook generation method of the present application, the set of time slots to be fed back includes time slots corresponding to conflicting SPS PDSCHs. Optionally, the set of time slots to be fed back only includes time slots corresponding to the conflicting SPS PDSCHs, and the finally obtained HARQ codebook is an independent HARQ feedback codebook generated for the conflicting SPS PDSCHs. Alternatively, the set of time slots to be fed back further includes time slots corresponding to non-conflicting SPS PDSCHs, and the time slot indices in the set of time slots to be fed back are arranged in order in the time domain.

If the time slot set to be fed back includes time slots corresponding to conflicting SPS PDSCHs, before generating the first HARQ codebook, it is necessary to confirm which are conflicting SPS PDSCHs. The UE can obtain the conflicting SPS PDSCH from the base station, or it can make statistics by itself. The pseudo code of the statistics is as follows:

[Step1]while

Let s=0

[Step2]while

Let n _C = 0

make

[Step3]while

[Step4]if

The HARQ-ACK feedback corresponding to the SPS PDSCH in the current downlink slot conflicts with the TDD configuration downlink slot or symbol (based on the parameter tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated configuration)

end if

n _C = n _C +1;

end while

s=s+1;

end while

c=c+1;

end while

The meanings of the parameters in this pseudo-code that are the same as those in the preceding pseudo-code will not be repeated.

n _C represents the slot index.

Indicates the specified time window.

implement

Before, the SPS PDSCH corresponding to the current n _C needs to be added to the conflicting SPS PDSCH set.

Based on the third embodiment of the HARQ feedback codebook generation method of the present application, when the SPS PDSCH aggregation degree of the current SPS configuration is greater than 1,

The overall HARQ feedback information for the aggregated at least two SPS PDSCHs. Optionally, when counting the set of time slots to be fed back, one may be selected from the time slots (eg, the first or the last one) corresponding to each group of aggregated SPS PDSCHs to be added to the set of time slots to be fed back.

For example, the pseudo code of the third embodiment of the HARQ feedback codebook generation method based on the present application is as follows:

Let c=0,j=0

[Step a]while

Let s=0 (representing the SPS PDSCH configuration index: corresponding to the RRC index corresponding to the corresponding SPS PDSCH configuration)

[Step b]while

make

[Step c]while

[Step d]if{

The UE is configured in the current serving cell c, and the current SPS PDSCH configuration s is received from the slot

to the SPS PDSCH sent on slotn _D , which excludes the following scenarios:

It is not required to receive SPS PDSCH in the overlapping SPS PDSCH. The UE has limited capability and cannot receive multiple PDSCHs. The current SPS PDSCH conflicts with the TDD uplink symbol (based on the parameter tdd-UL-DL-ConfigurationCommon or tdd-UL-DL-ConfigurationDedicated configuration)

in,

It is configured by pdsch-AggregationFactor in the high-level parameter sps-Config. If pdsch-AggregationFactor is not configured, the configuration in pdsch-config is used.

}

HARQ-ACK information bit corresponding to the current SPS PDSCH; if

greater than 1, the slot will be

Perform logical AND calculation on the HARQ-ACK information corresponding to the SPS PDSCH sent on slotn _D

j=j+1;

end if

end while

s=s+1;

end while

c=c+1;

end while

The meanings of the parameters in this pseudo-code that are the same as those in the preceding pseudo-code will not be repeated.

Indicates the SPS PDSCH aggregation degree.

The fourth embodiment of the HARQ feedback codebook generation method of the present application, if applied to the generation of the Type1 HARQ codebook, can skip the time slot corresponding to the SPS PDSCH that does not exist in the process of counting the time slots to be fed back, or in the exclusion condition (Exclude the following scenarios in stepd) Add the current SPS PDSCH without actual transmission, or add a condition between stepc and stepd: "There is actual transmission in the current SPS PDSCH", only when this condition is satisfied can stepd be executed, otherwise, directly Update n _D . If applied to the generation of the Type3 HARQ codebook, a condition can be added: "the current HARQ process is not the HARQ process corresponding to the SPS PDSCH without actual transmission".

Based on the fifth embodiment of the HARQ feedback codebook generation method of the present application, the pseudo code for generating the Type3 HARQ codebook is as follows:

Let c=0

Let h=0

Let j=0

while

while

if{HARQ process h is the HARQ process corresponding to the conflicting HARQ-ACK feedback}

if NDI _HARQ =1

Let n _D = 0 (representing the slot index)

while

HARQ process h, HARQ-ACK information bit corresponding to slot n _D

j=j+1;

n _D =n _D +1;

end while

else

Let n _D = 0 (representing the slot index)

while

HARQ process h, HARQ-ACK information bit corresponding to slot n _D

j=j+1;

The NDI value configured in (serving cell c, the indication corresponding to HARQ process h), if not configured, the default is 0

j=j+1;

n _D =n _D +1;

end while

end if

end if

end while

end while

The meanings of the parameters in this pseudo-code that are the same as those in the preceding pseudo-code will not be repeated.

in,

h represents the HARQ process index.

Indicates the number of HARQ processes of serving cell c, which is configured by the RRC parameter nrofHARQ-ProcessesForPDSCH. If this parameter is not configured, it defaults to 8.

If the parameter pdsch-HARQ-ACK-OneShotFeedbackNDI-r16 is configured then NDI _HARQ = 0 else NDI _HARQ = 1.

As shown in FIG. 7 , an embodiment of the communication device of the present application includes: a processor 110 and a memory 120 .

The processor 110 controls the operation of the communication device, and the processor 110 may also be referred to as a CPU (Central Processing Unit, central processing unit). The processor 110 may be an integrated circuit chip with processing capability of signal sequences. Processor 110 may also be a general purpose processor, digital signal sequence processor (DSP), application specific integrated circuit (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 120 stores instructions and data required for the operation of the processor 110 .

The processor 110 is configured to execute the instruction to implement the above-mentioned method and the possible combination method of the automatic repeat request HARQ codebook generation method of the present application.

As shown in FIG. 8 , an embodiment of the readable storage medium of the present application includes a memory 310, and the memory 310 stores an instruction, when the instruction is executed, the above method and possible combination methods of the automatic repeat request HARQ codebook generation method of the present application are implemented.

The memory 310 may include a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a flash memory (Flash Memory), a hard disk, an optical disk, and the like.

In the several embodiments provided in this application, it should be understood that the disclosed method and apparatus may be implemented in other manners. For example, the device implementations described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other divisions. For example, multiple units or components may be Incorporation may either be integrated into another system, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and 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 purpose of the solution in this implementation manner.

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

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

The above description is only an embodiment of the present application, and is not intended to limit the scope of the patent of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied to other related technologies Fields are similarly included within the scope of patent protection of this application.

Claims (21)

1. A hybrid automatic repeat request HARQ feedback codebook generation method, the method is applied to the user equipment side, and characterized in that, the method includes:

   Take each serving cell as the current cell respectively;

   For each of the current cells, use each semi-persistently scheduled SPS configuration as the current SPS configuration;

   For the current SPS configuration, the time slot corresponding to each SPS physical downlink shared channel PDSCH to be fed back is taken as the current time slot, and the SPS PDSCH to be fed back includes the SPS PDSCH that satisfies the first condition, the first condition The original feedback position including the SPS PDSCH conflicts with the time division duplex configuration;

   If the current time slot satisfies the exclusion condition, the HARQ feedback information corresponding to the current time slot is not added to the first HARQ codebook; otherwise, the HARQ feedback information corresponding to the current time slot is added to the first HARQ codebook , thereby generating the first HARQ codebook.
2. The method of claim 1, wherein:

   The SPS PDSCH to be fed back only includes the SPS PDSCH that satisfies the first condition.
3. The method of claim 2, further comprising:

   generating a second HARQ codebook for the SPS PDSCH whose original feedback position does not conflict with the time division duplex configuration;

   combining the first HARQ codebook and the second HARQ codebook to obtain a third HARQ codebook;

   The third HARQ codebook is sent to the base station.
4. The method of claim 1, wherein:

   The SPS PDSCH to be fed back further includes the SPS PDSCH whose original feedback position does not conflict with the time division duplex configuration, and all the SPS PDSCH to be fed back are sorted according to the time sequence of the corresponding time slots.
5. The method of claim 1 or 4, further comprising:

   The first HARQ codebook is sent to the base station.
6. The method according to any one of claims 1-4, characterized in that, further comprising:

   Receive a retransmission trigger message from the base station.
7. The method according to any one of claims 1-4, wherein the first condition further comprises that the time slot corresponding to the SPS PDSCH is within a specified time window.
8. The method according to any one of claims 1-4, wherein if the SPS PDSCH aggregation degree of the current SPS configuration is greater than 1, the HARQ feedback information corresponding to the current time slot is the aggregated at least two SPSs Overall HARQ feedback information for PDSCH.
9. The method of claim 8, wherein:

   The first condition further includes that when the SPS PDSCH aggregation degree of the current SPS configuration is greater than 1, the SPS PDSCH is one of the at least two SPS PDSCHs aggregated.
10. The method of claim 8, wherein:

    The overall HARQ feedback information of the aggregated at least two SPS PDSCHs is a result of performing logical AND calculation on the HARQ feedback information of the aggregated respective SPS PDSCHs.
11. The method according to any one of claims 1-4, wherein the first condition further comprises that there is actual transmission of the SPS PDSCH; or

    The exclusion condition further includes that the SPS PDSCH corresponding to the current time slot does not have the actual transmission.
12. A hybrid automatic repeat request HARQ feedback codebook generation method, the method is applied to the user equipment side, and characterized in that, the method includes:

    Take each serving cell as the current cell respectively;

    For each of the current cells, take each HARQ process as the current HARQ process;

    If the original feedback position of the SPS PDSCH corresponding to the current HARQ process conflicts with the time division duplex configuration, the HARQ feedback information of the SPS PDSCH corresponding to the current HARQ process is added to the first HARQ codebook, thereby generating the first HARQ code Book.
13. A hybrid automatic repeat request HARQ feedback codebook generation method, the method is applied to the user equipment side, and characterized in that, the method includes:

    Take each serving cell as the current cell respectively;

    For each of the current cells, use each SPS configuration as the current SPS configuration;

    For the current SPS configuration, the time slot corresponding to each SPS PDSCH to be fed back is respectively used as the current time slot;

    If the current time slot satisfies the exclusion condition, the HARQ feedback information corresponding to the current time slot is not added to the first HARQ codebook; otherwise, the HARQ feedback information corresponding to the current time slot is added to the first HARQ codebook , thereby generating the first HARQ codebook, wherein if the SPS PDSCH aggregation degree of the current SPS configuration is greater than 1, the HARQ feedback information corresponding to the current time slot is the overall HARQ feedback information of the aggregated at least two SPS PDSCHs.
14. The method of claim 13, wherein:

    In the case that the SPS PDSCH aggregation degree of the current SPS configuration is greater than 1, the SPS PDSCH to be fed back is one of the at least two SPS PDSCHs aggregated.
15. The method of claim 13, wherein:

    The overall HARQ feedback information of the aggregated at least two SPS PDSCHs is a result of performing logical AND calculation on the HARQ feedback information of the aggregated respective SPS PDSCHs.
16. The method according to any one of claims 13-15, wherein the step of using the time slot corresponding to each SPS physical downlink shared channel PDSCH to be fed back as the current time slot further comprises:

    If there is actual transmission on the SPS PDSCH corresponding to the current time slot, perform a subsequent decision on whether to add the HARQ feedback information corresponding to the current time slot to the first HARQ code according to whether the current time slot satisfies the exclusion condition In this step, if the actual transmission does not exist on the SPS PDSCH corresponding to the current time slot, the HARQ feedback information corresponding to the current time slot is not added to the first HARQ codebook.
17. The method according to any one of claims 13-15, wherein,

    The exclusion condition includes that there is no actual transmission of the SPS PDSCH corresponding to the current time slot.
18. A hybrid automatic repeat request HARQ feedback codebook generation method, the method is applied to the user equipment side, and characterized in that, the method includes:

    Take each serving cell as the current cell respectively;

    For each of the current cells, use each SPS configuration as the current SPS configuration;

    For the current SPS configuration, the time slot corresponding to each SPS PDSCH to be fed back is respectively used as the current time slot;

    If the current time slot satisfies the exclusion condition, the HARQ feedback information corresponding to the current time slot is not added to the first HARQ codebook; otherwise, the HARQ feedback information corresponding to the current time slot is added to the first HARQ codebook , thereby generating the first HARQ codebook;

    The time slot corresponding to the SPS PDSCH to be fed back does not include the time slot corresponding to the SPS PDSCH that does not have actual transmission, and/or the exclusion condition includes that the SPS PDSCH corresponding to the current time slot does not have the actual transmission.
19. A hybrid automatic repeat request HARQ feedback codebook generation method, the method is applied to the user equipment side, and characterized in that, the method includes:

    Take each serving cell as the current cell respectively;

    For each of the current cells, take each HARQ process as the current HARQ process;

    If there is actual transmission on the SPS PDSCH corresponding to the current HARQ process, the HARQ feedback information of the SPS PDSCH corresponding to the current HARQ process is added to the first HARQ codebook, thereby generating the first HARQ codebook.
20. A communication device, comprising: a processor and a memory, wherein the processor is connected to the memory;

    The processor is adapted to execute instructions to implement the method of any of claims 1-19.
21. A readable storage medium storing instructions, wherein when the instructions are executed, the method according to any one of claims 1-19 is implemented.

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