WO2022127596A1

WO2022127596A1 - Data sending and receiving methods, communication device, and storage medium

Info

Publication number: WO2022127596A1
Application number: PCT/CN2021/134717
Authority: WO
Inventors: 孙军帅
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团有限公司
Priority date: 2020-12-15
Filing date: 2021-12-01
Publication date: 2022-06-23
Also published as: CN114640426A

Abstract

Disclosed in the present application are a data sending and receiving method, a communication device, and a storage medium. The method comprises: determining bearers and/or processes of MAC PDUs sent to a lower layer; and sending in sequence according to the bearers and/or processes; receiving the MAC PDUs; determining the bearers and/or processes of the MAC PDUs; and sorting the received MAC PDUs in sequence according to the bearers and/or processes. By means of the present application, the length of an SN can be shortened, the overhead of transmitting a long SN can be reduced, and time and storage cache overhead during a sorting window and sorting can be further reduced. MAC can be triggered to introduce more mechanisms for fast data sending, thereby reducing the delay. Data packet sorting is implemented while ensuring the flexible use of a HARQ process.

Description

A data transmission and reception method, communication device, and storage medium

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with the application number of 202011479363.X and the filing date of December 15, 2020, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is incorporated herein by reference.

technical field

The present application relates to the field of wireless communication technologies, and in particular, to a method for sending and receiving data, a communication device, and a storage medium.

Background technique

In 5G, MAC (Media Access Control) does not have a sorting method. The MAC of the sender forms MAC PDU (Protocol Data Unit) from the data on different RBs (Radio Bearer, Radio Bearer) or LGCH (Logical Channel) of the user according to the scheduling result, and selects the available HARQ (mixed Automatic retransmission request, Hybrid automatic repeat request) process sent to the receiver. After receiving the MAC PDU in the corresponding HARQ process, the MAC at the receiving end sends the parsed MAC SDU to the upper layer, and the upper layer sorts it.

The disadvantage of the prior art is that, after some newly introduced technologies, the non-sequencing of MACs will lead to an increasing system overhead.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a data sending and receiving method, a communication device, and a storage medium, so as to solve the problem of increasing system overhead due to the non-sequencing of MACs.

The embodiments of the present application provide the following technical solutions:

The embodiment of the present application provides a data sending method, including:

Determine the bearer and/or process of the MAC PDU sent to the lower layer;

The transmissions are performed in order according to the bearer and/or process.

In some optional implementation manners, the transmission is performed in order according to the bearer and/or process, including:

For one or more upper-layer PDUs transmitted by the same upper-layer bearer contained in each MAC SDU, form MAC PDUs in the order received from the upper-layer and send them;

When sending between different processes, the data packets carried by one or more upper layers contained in the MAC SDUs in the MAC PDUs sent by different processes are taken as the unit of the upper layer bearer, and the MAC layer is sent in the order received from the upper layer bearer.

In some optional implementations, when sending between different processes, it further includes:

When sending each MAC PDU, carry the identification information of the preceding and/or succeeding MAC PDU of the MAC PDU.

In some optional embodiments, the identification information of the preceding and/or succeeding MAC PDUs includes one of the following information or a combination thereof:

HARQ process ID for sending the MAC PDU, sequence number for data packet transmission, one of the subframe number, frame number, symbol index, and time slot number of the air interface or a combination thereof, the air interface time-frequency domain resource information of the PDCCH, and the air interface of the PDSCH Time-frequency domain resource information.

In some optional embodiments, when sending each MAC PDU, carry identification information of the MAC PDU precursor and/or subsequent MAC PDU, including:

If the identification information is the sequence number of the MAC PDU, the sequence number of the current MAC PDU is carried in the MAC PDU;

If the identification information is one of the following information or a combination thereof, the identification information is carried by performing data transmission according to the air interface timing relationship: air interface subframe number, frame number, symbol index, time slot number, and air interface time-frequency domain resource information of the PDCCH , PDSCH air interface time-frequency domain resource information;

If the identification information is the HARQ process ID, it carries the predecessor and/or successor HARQ process ID.

In some optional embodiments, if the identification information is the HARQ process ID, when forming the control information of the MAC PDU to be sent this time, the HARQ process ID of the precursor MAC PDU of the MAC PDU to be sent this time is carried;

When the data is retransmitted, it carries the HARQ process ID of the subsequent MAC PDU, or does not carry the HARQ process ID of the subsequent MAC PDU.

In some optional embodiments, the HARQ process ID is sent at the DCI through the PDCCH, or is carried and sent through the MAC CE.

The embodiment of the present application provides a data receiving method, including:

receive MAC PDU;

determine the bearer and/or process of the MAC PDU;

The received MAC PDUs are ordered in order according to the bearer and/or process.

In some optional implementations, the received MAC PDUs are sorted in order according to the bearer and/or process, including:

For one or more upper layer PDUs transmitted by the same upper layer bearer contained in each MAC SDU, sort the MAC SDUs in the received MAC PDUs according to the order of reception;

When receiving between different processes, for one or more data packets carried by the upper layer contained in the MAC SDU in the MAC PDU sent by different processes, the upper layer bearer is the unit, and the order of reception is the MAC SDU in the received MAC PDU. Layers carry the ordering in units.

In some optional implementations, when receiving between different processes, it further includes:

When each MAC PDU is received, sorting is performed according to the identification information of the predecessor and/or successor MAC PDU carried by the MAC PDU.

In some optional embodiments, sorting is performed according to the identification information of the predecessor and/or successor MAC PDU carried by the MAC PDU, including:

If the identification information is the sequence number of the MAC PDU, it is sorted according to the sequence number of the current MAC PDU carried in the MAC PDU;

If the identification information is one of the following information or a combination thereof, the identification information carried is determined according to the air interface timing relationship at the time of reception: subframe number, frame number, symbol index, time slot number, and air interface time-frequency domain resource information of the PDCCH of the air interface , PDSCH air interface time-frequency domain resource information;

If the identification information is the HARQ process ID, the sequence is performed according to the carried predecessor and/or successor HARQ process ID.

In some optional embodiments, if the identification information is a HARQ process ID, what carries the HARQ process ID of the precursor MAC PDU of the MAC PDU sent this time is the MAC PDU sent this time;

It carries the HARQ process ID of the subsequent MAC PDU, or does not carry the HARQ process ID of the subsequent MAC PDU, which is retransmission data.

In some optional embodiments, the HARQ process ID is received at DCI through PDCCH, or is received through MAC CE carry.

In some optional embodiments, it further includes:

Perform data packet reassembly according to the sorting result, until all data packets are reassembled for delivery or if they are not received correctly, stop reassembly.

In some optional embodiments, it further includes:

Each HARQ process sets up a multi-layer caching mechanism, and performs packet reassembly according to the sorting result.

In some optional embodiments, it further includes:

Delivered to the upper layer in the order of each upper layer PDU in the received PDUs.

An embodiment of the present application provides a communication device, including:

The processor, used to read the program in the memory, controls the MAC layer to perform the following processes:

Determine the bearer and/or process of the MAC PDU sent to the lower layer;

send in order according to the bearer and/or process;

A transceiver for receiving and transmitting data under the control of the processor.

a sending determining module, used to determine the bearer and/or process of the MAC PDU sent to the lower layer;

A sending module, configured to send in sequence according to the bearer and/or process.

In some optional implementation manners, the sending module is further configured to, when sending in sequence according to the bearer and/or process, include:

In some optional embodiments, the sending module is further configured to carry identification information of the MAC PDU precursor and/or subsequent MAC PDU when sending each MAC PDU.

In some optional embodiments, the sending module is further configured to carry the identification information of the predecessor and/or successor MAC PDU including one of the following information or a combination thereof:

In some optional embodiments, the sending module is further configured to, when sending each MAC PDU, when carrying the identification information of the MAC PDU precursor and/or the successor MAC PDU, including:

In some optional embodiments, the sending module is further configured to, when sending, if the identification information is the HARQ process ID, when assembling the control information of the MAC PDU to be sent this time, carry the precursor MAC PDU of the MAC PDU sent this time HARQ process ID;

In some optional embodiments, the sending module is further configured to send the HARQ process ID through the PDCCH at the DCI, or send the HARQ process ID through the MAC CE.

receive MAC PDU;

determine the bearer and/or process of the MAC PDU;

ordering the received MAC PDUs in order according to the bearer and/or process;

HARQ process ID for sending the MAC PDU, sequence number for sending the data packet, one or a combination of the subframe number, frame number, symbol index, and time slot number of the air interface, the air interface time-frequency domain resource information of the PDCCH, and the air interface of the PDSCH Time-frequency domain resource information.

If the identification information is the HARQ process ID, the sequence is performed according to the carried predecessor and/or subsequent HARQ process ID.

In some optional embodiments, it further includes:

The receiving module is used to receive the MAC PDU;

a reception determination module for determining the bearer and/or process of the MAC PDU;

A sorting module, configured to sort the received MAC PDUs in order according to the bearer and/or process.

In some optional embodiments, the ordering module is further configured to order the received MAC PDUs in order according to the bearer and/or process, including:

In some optional embodiments, the sorting module is further configured to, when receiving between different processes, when each MAC PDU is received, sort according to the identification information of the predecessor and/or subsequent MAC PDU carried by the MAC PDU.

In some optional embodiments, the ordering module is further configured to order according to the identification information of the predecessor and/or successor MAC PDUs including one of the following information or a combination thereof:

In some optional embodiments, the sorting module is further configured to, when sorting according to the identification information of the predecessor and/or the successor MAC PDU carried by the MAC PDU, include:

In some optional embodiments, the sorting module is further configured to, during sorting, if the identification information is the HARQ process ID, the HARQ process ID of the precursor MAC PDU of the MAC PDU sent this time is the MAC PDU sent this time. PDU;

In some optional embodiments, the receiving module is further configured to receive the HARQ process ID through the PDCCH at the DCI, or to receive the HARQ process ID carried by the MAC CE.

In some optional embodiments, it further includes:

The reassembly module is used to reorganize the data packets according to the sorting result, until all the data packets are reorganized for delivery or stop the reassembly when they are not received correctly.

In some optional embodiments, the reorganization module is further configured to set up a multi-layered buffer mechanism for each HARQ process, and perform data packet reassembly according to the sorting result.

In some optional embodiments, the reassembly module is further configured to deliver to the upper layer in the order of each of the PDUs of the upper layer in the received PDUs.

An embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the above data sending method and/or data receiving method.

In the technical solutions provided by the embodiments of the present application, when sending, the MAC PDUs are sent in sequence according to the bearer and/or process; when receiving, the received MAC PDUs are sequentially sent according to the bearer and/or process. Sorting realizes MAC sorting, thereby reducing the range of upper layer disorder, thus shortening the SN length, reducing the overhead of transmitting long SNs, and reducing the sorting window and sorting time and storage cache overhead. Further, through the MAC sorting, the MAC can be triggered to introduce more mechanisms for fast data transmission, thereby reducing the delay. Further, on the premise of ensuring the flexible use of the HARQ process, the ordering of data packets is realized.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

FIG. 1 is a schematic flowchart of the implementation of a method for sending data on a MAC of a sender according to an embodiment of the present application;

FIG. 2 is a schematic flowchart of the implementation of the data receiving method on the receiving end MAC in the embodiment of the present application;

3 is a schematic diagram of MAC HARQ multi-process sending and receiving MAC PDUs in an embodiment of the application;

4 is a schematic diagram of MAC HARQ process buffering and sorting in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a second communication device in an embodiment of the present application.

Detailed ways

During the process of the invention, the inventors noticed:

The ordering of data packets by the upper layer of the MAC layer (such as RLC (Radio Link Control, Radio Link Control) or PDCP (Packet Data Convergence Protocol)) is commonly used by RAN (Radio Access Network). method.

In 5G, DC (Dual Connectivity) and MC (Multiple Connectivity) are introduced, and the system overhead caused by the need for sorting due to out-of-order data packets is increasing. For example, 5G PDCP introduces 18-bit length. SN (Sequence Number, Sequence Number) number. If the out-of-order can be reduced, the length of SN can be shortened, the overhead of transmitting long SN can be reduced, and the overhead of sorting window and sorting time and storage cache can be reduced.

Based on this, the embodiment of the present application provides that when HARQ multi-process is sent, the MAC PDUs are sorted by means of the sequence of MAC processes selected during MAC scheduling, so as to ensure the orderly reception of data packets at the MAC layer and reduce chain links. Sorting overhead on the way.

The specific embodiments of the present application will be described below with reference to the accompanying drawings.

In the description process, the implementation on the MAC side of the sender and the MAC side of the receiver will be described respectively, and then an example of their coordinated implementation will be given to better understand the implementation of the solutions given in the embodiments of the present application. Such an explanation method does not mean that the two must be implemented together or must be implemented separately. In fact, when the sender MAC and the receiver MAC are implemented separately, they also solve the problems of the sender MAC and the receiver MAC respectively. When the two are used in combination, a better technical effect will be obtained.

Figure 1 is a schematic diagram of the implementation flow of the data transmission method on the MAC of the sender, as shown in the figure, including:

Step 101, determine the bearer and/or process of the MAC PDU sent to the lower layer;

Step 102: Send in sequence according to the bearer and/or process.

FIG. 2 is a schematic flowchart of the implementation of the data receiving method on the receiving end MAC, as shown in the figure, including:

Step 201, receive MAC PDU;

Step 202, determine the bearer and/or process of the MAC PDU;

Step 203: Sort the received MAC PDUs in order according to the bearer and/or process.

Specifically, the out-of-order data packets caused by HARQ multi-process are sorted at the MAC layer, thereby reducing the data packet sorting pressure on the upper layer of the MAC layer.

The sending sequence of data packets can be controlled by the MAC scheduler during scheduling, so that the MAC layer at the receiving end can receive the out-of-order data packets in order.

The implementation of the MAC PDU ordering scheme for HARQ multi-process will be described below.

In some optional embodiments, on the sender MAC, the transmission is performed in order according to the bearer and/or process, including:

Correspondingly, at the receiving end MAC, the received MAC PDUs are sorted in order according to the bearer and/or process, including:

Specifically, the MAC PDU (Protocol Data Unit, Protocol Data Unit) contains data content MAC SDU (Service Data Unit, Service Data Unit), and each MAC SDU contains the PDU of the upper layer of the MAC layer. Each MAC SDU can contain data packets on one or more upper layer bearers (in 5G, a MAC SDU can only carry the data of one upper layer bearer (logical channel or DRB (Data Radio Bearer)). In future communication This limit may be broken in the system). Each MAC SDU can contain one or more upper-layer PDUs transmitted by the same upper-layer bearer (the upper-layer with MAC in 5G encapsulates multiple SDUs of the upper-layer into one upper-layer PDU, that is, only one upper-layer PDU is included).

That is, the MAC layer is based on the HARQ multi-thread sorting scheme to complete two levels of sorting:

Case 1. Sorting of the upper layer data packets contained in the MAC SDU: Sort one or more upper layer PDUs transmitted by the same upper layer bearer contained in each MAC SDU. The transmission and reception of the MAC layer are performed in the order received from the upper layer.

Case 2. Sorting between MAC PDUs between different processes: When sending between different processes, sort the data packets carried by one or more upper layers contained in the MAC SDUs in the MAC PDUs sent by different processes. . The transmission and reception of the MAC layer are performed in the order received from the upper layer bearer.

Figure 3 is a schematic diagram of MAC HARQ multi-process sending and receiving MAC PDUs. As shown in the figure, Figure 3 shows a schematic diagram of using HARQ multi-processes to send and receive MAC PDUs.

Among them, TB (Transport Block, Transport Block) is the data block transmitted by each HARQ process, that is, MAC PDU.

The MAC scheduler selects an idle and available HARQ process to send data each time, so the MAC scheduler does not select processes in the order of HARQ process IDs. In Figure 3, the process 1# process is not used, because the process n-1# process gets ACK (Acknowledgement) feedback in time after sending data and becomes an "available process". After the HARQ process is determined, the MAC PDU is formed.

Ordering for case 1 (ordering of upper layer packets contained in the MAC SDU):

1. When the sender MAC constructs the MAC PDU, it constructs the MAC PDU according to the sequence of the upper layer PDUs received from the upper layer of the MAC.

2. When the MAC at the receiving end parses the MAC PDU, it submits data to the upper layer according to the order of different data units in the MAC SDU in the MAC SDU.

The ordering implementation for case 2 (ordering between MAC PDUs between different processes) can be as follows:

In some optional implementations, on the sender MAC, when sending between different processes, the method further includes:

Correspondingly, the MAC at the receiving end has, and when receiving between different processes, it further includes:

1. When the MAC of the sender sends each MAC PDU to its lower layer, it carries the identification information of the preceding and/or succeeding MAC PDU of the MAC PDU.

2. After receiving a MAC PDU, the MAC of the receiving end completes the sorting of the predecessor or the successor MAC PDU according to the identification information of the predecessor and/or the successor MAC PDU of the MAC PDU.

The implementation of the sender MAC in case 2 will be described below.

Specifically, the identification information of the predecessor and/or the successor MAC PDU may be the HARQ process ID (Process ID) for sending the MAC PDU, or may be the sequence number of the transmission of the data packet, or the sub-frame number (Sub Frame) of the air interface. , frame number (Frame), symbol index (Symbol), time slot number (Time Slot) one or a combination of several, or PDCCH (Physical Downlink Control Channel, Physical downlink control channel) or PDSCH (Physical Downlink Shared Channel, Physical Downlink shared channel) air interface time-frequency domain resource information.

There is no predecessor for the first new packet and no successor for the last packet.

In specific implementation, when sending each MAC PDU, carry the identification information of the MAC PDU precursor and/or the successor MAC PDU, including:

In specific implementation, if the identification information is the HARQ process ID, when forming the control information of the MAC PDU to be sent this time, the HARQ process ID of the precursor MAC PDU of the MAC PDU to be sent this time is carried;

Specifically, if it is the serial number of the MAC PDU, it is only necessary to carry the serial number of the current MAC PDU in the MAC PDU, and it is not necessary to carry the serial number of the predecessor and/or subsequent MAC PDU, because the serial number itself contains the sequence number before and after. relation.

If it is an identifier related to the air interface timing, that is, one or a combination of the subframe number (Sub Frame), frame number (Frame), symbol index (Symbol), and time slot number (Time Slot) of the air interface, or PDCCH/ For the air interface time-frequency domain resource information of the PDSCH, the above information does not need to be carried when sending the MAC PDU, as long as the data is sent according to the air interface timing relationship. The receiver can determine the predecessor and/or successor MAC PDU corresponding to the received MAC PDU this time according to the relevant identifier of the air interface timing where the received PDCCH or PDSCH is located or the air interface time-frequency domain resource information, because the above air interface timing relationship itself includes before and after relationship.

If it is a HARQ process ID, the predecessor and/or successor process IDs need to be carried, because the MAC does not select the available HARQ processes according to the sequence of process IDs when sending. When assembling the control information of the MAC PDU to be sent this time, the MAC determines the HARQ process ID of the precursor MAC PDU of the MAC PDU to be sent this time. When it is retransmission data, the subsequent HARQ process ID may be carried or not carried.

When the MAC scheduler schedules, if a new MAC PDU is sent (new transmission), the HARQ ID (precursor HARQ process ID) used in the next scheduling is carried to the MAC PDU. If a MAC PDU is retransmitted (retransmission), the HARQ ID (precursor HARQ process ID) used in the next scheduling and/or the process ID of the immediate successor is carried in the MAC PDU.

In a specific implementation, the HARQ process ID is sent through the PDCCH in the DCI, or is carried and sent through the MAC CE.

HARQ process ID sending mode: The predecessor and/or successor HARQ process ID can be added to the DCI (Downlink Control Information) carrying the control information, and sent through the PDCCH channel. A new MAC CE (Media Access Control Control Element; CE: Control Element, Control Element) type can be added to carry the newly added predecessor and/or successor HARQ process ID.

The implementation of the MAC at the receiving end in Case 2 will be described below.

In implementation, sorting is performed according to the identification information of the predecessor and/or successor MAC PDU carried by the MAC PDU, including:

If the identification information is one of the following information or a combination thereof, the implicitly carried identification information is determined according to the air interface timing relationship at the time of reception: subframe number, frame number, symbol index, time slot number, air interface time-frequency domain of the PDCCH of the air interface Resource information, PDSCH air interface time-frequency domain resource information;

In the specific implementation, if the identification information is the HARQ process ID, what carries the HARQ process ID of the precursor MAC PDU of the MAC PDU sent this time is the MAC PDU sent this time;

In a specific implementation, the HARQ process ID is received at the DCI through the PDCCH, or is carried and received through the MAC CE.

Specifically, sorting is performed according to the identification information of the preceding and/or succeeding MAC PDUs. Sort the MAC PDUs received this time to the immediate back according to the predecessor information. If it also carries the identification information of the successor, it can be used to confirm whether the successor is correct, so as to further confirm the ordering position of the MAC PDU.

If it is the serial number of the MAC PDU, insert it directly into the corresponding position according to the serial number;

If it is an identifier related to the air interface timing, determine the sorting position according to the constraint relationship;

If it is a HARQ process ID, it points to the corresponding HARQ process;

Regardless of whether the sender sends the identification information of the subsequent MAC PDU or not, when the receiver stores the received MAC PDU, if the MAC PDU has a predecessor (the first new data packet has no predecessor) or successor (the last new data packet does not have a predecessor) Subsequent, in the process of data exchange, after the arrival of the subsequent data packet, the identification information can be updated to the predecessor MAC PDU) to establish the relationship between the predecessor and the successor of the MAC PDU.

In some optional implementations, it may further include:

Specifically, data packet reassembly is performed according to the sorting result. If the preceding data packet has been received correctly (including the upper layer that has been delivered to the MAC), the MAC PDU is parsed to obtain the corresponding MAC SDU and the PDU of the upper layer that it contains, and then delivered to the upper layer of the MAC in sequence. Read the subsequent MAC PDU of the MAC PDU. If the MAC PDU has been received correctly, parse the MAC PDU to obtain the corresponding MAC SDU and the PDU of the upper layer contained in it, and submit it to the upper layer of the MAC in sequence. Continue to read subsequent MAC PDUs until all data packets are reassembled for delivery or have not been received correctly, stop reassembly.

In some optional implementations, it may further include:

Specifically, each HARQ process sets up a multi-layered buffer mechanism to realize the function of reorganizing data packets in sequence.

Figure 4 is a schematic diagram of MAC HARQ process buffering and sorting. As shown in the figure, Figure 4 presents a schematic diagram of the buffering function of each HARQ process. The bidirectional arrow line in the horizontal direction of type A indicates the relationship between the predecessor and the successor of the MAC PDU in the buffer of the HARQ process. The two-way arrow lines in the vertical direction of type B indicate the relationship between different rounds of buffered MAC PDUs of a HARQ process. C-shaped single-arrow slashes indicate the index relationship between a HARQ process and its cache.

When sorting, sort according to the direction of the double arrow line in the horizontal direction of Type A. When the previous MAC PDU of a process completes the ordering and submission, the C line is guided to the next MAC PDU (Buffer (buffer)) waiting for ordering according to the B line index.

For the retransmitted data packets, if the retransmission has not been successful, it can be discarded at the MAC layer and retransmitted and sorted by the upper layer of the MAC. If the receiver cannot receive information due to the loss of information during air interface transmission, the information between the sender and the receiver is inconsistent. For example, the loss of PDCCH causes the sender to send a data packet, but the receiver does not perceive it (that is, the receiver does not know the opposite end at all. sent) to the sender to send the data packet, this disorder can also be sorted by the upper layer of the MAC.

In some optional implementations, it may further include:

Specifically, the MAC delivers the received PDUs to the upper layer according to the order of the PDUs of each upper layer.

Based on the same inventive concept, a communication device and a computer-readable storage medium are also provided in the embodiments of the present application. Since the principle of solving the problem of these devices is similar to the data sending method and the data receiving method, the implementation of these devices can refer to the method of implementation, and the repetition will not be repeated.

When implementing the technical solutions provided in the embodiments of the present application, the technical solutions can be implemented as follows.

FIG. 5 is a schematic structural diagram of a communication device. As shown in the figure, the communication device includes:

The processor 500 is configured to read the program in the memory 520 and control the MAC layer to perform the following processes:

Determine the bearer and/or process of the MAC PDU sent to the lower layer;

send in order according to the bearer and/or process;

The transceiver 510 is used for receiving and transmitting data under the control of the processor 500 .

5, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 500 and various circuits of memory represented by memory 520 are linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein. The bus interface provides the interface. Transceiver 510 may be multiple elements, ie, including a transmitter and a receiver, providing a means for communicating with various other devices over a transmission medium. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 500 in performing operations.

The embodiment of the present application also provides a communication device, including:

A sending determination module, used to determine the bearer and/or process of the MAC PDU sent to the lower layer;

In some optional embodiments, the sending module is further configured to carry the identification information of the MAC PDU precursor and/or subsequent MAC PDU when sending each MAC PDU.

For the convenience of description, each part of the device described above is divided into various modules or units by function and described respectively. Of course, when implementing the present application, the functions of each module or unit may be implemented in one or more software or hardware.

FIG. 6 is a schematic diagram of the second structure of the communication device. As shown in the figure, the communication device includes:

The processor 600 is configured to read the program in the memory 620 and control the MAC layer to perform the following processes:

receive MAC PDU;

determine the bearer and/or process of the MAC PDU;

order the received MAC PDUs in order according to the bearer and/or process;

The transceiver 610 is used for receiving and transmitting data under the control of the processor 600 .

If the identification information is one of the following information or a combination thereof, the identification information carried is determined according to the air interface timing relationship during reception: subframe number, frame number, symbol index, time slot number, and air interface time-frequency domain resource information of the PDCCH of the air interface , PDSCH air interface time-frequency domain resource information;

In some optional embodiments, it further includes:

6, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 600 and various circuits of memory represented by memory 620 are linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein. The bus interface provides the interface. Transceiver 610 may be a number of elements, including a transmitter and a receiver, that provide a means for communicating with various other devices over a transmission medium. The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 600 in performing operations.

The receiving module is used to receive the MAC PDU;

an ordering module, configured to order the received MAC PDUs in order according to the bearer and/or process.

In some optional embodiments, the ordering module is further configured to perform ordering according to the identification information of the predecessor and/or successor MAC PDU carried by the MAC PDU when receiving each MAC PDU when receiving between different processes.

In some optional embodiments, it further includes:

The reassembly module is used to reorganize the data packets according to the sorting result, until all the data packets are reassembled for delivery or stop the reassembly when they are not received correctly.

An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the above data sending method and/or data receiving method.

Specifically, in some optional implementation manners, reference may be made to the implementation of the method for sending data at the MAC sending end and/or the method for receiving data at the MAC receiving end.

To sum up, the embodiments of the present application provide a MAC PDU ordering scheme for HARQ multi-process;

Provides two sorting schemes for HARQ multi-process sorting: 1. Sorting of upper-layer data packets contained in MAC SDUs; 2. Sorting between MAC PDUs between different processes;

Further, the scheme of the sender of the case 2 is provided: the scheme of identifying the predecessor and subsequent data packets in different HARQ Process sorting is given, and the order recording scheme of HARQ Process in out-of-order transmission;

Scenario 2's receiving-end solution: The HARQ Process reception sorting solution, the definition method of the HARQ Process process cache, and the solution to the upper layer after the packet is parsed are given;

Through MAC sorting, the range of upper layer disorder is reduced.

Through MAC sorting, the MAC can be triggered to introduce more mechanisms for fast data transmission, thereby reducing the delay.

On the premise of ensuring the flexible use of the HARQ process, the ordering of data packets is realized.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein, including but not limited to disk storage, optical storage, and the like.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

A data sending method, comprising:

Determine the bearer and/or process of the medium access control protocol data unit MAC PDU sent to the lower layer;

The transmissions are performed in order according to the bearer and/or process.
The method of claim 1, wherein transmitting in order according to the bearer and/or process, comprising:

For one or more upper layer PDUs transmitted by the same upper layer bearer contained in each medium access control service data unit (MAC SDU), the MAC PDUs are formed and sent in the order received from the upper layer;

When sending between different processes, the data packets carried by one or more upper layers contained in the MAC SDUs in the MAC PDUs sent by different processes are taken as the unit of the upper layer bearer, and the MAC layer is sent in the order received from the upper layer bearer.
The method of claim 2, wherein, when sending between different processes, further comprising:

When sending each MAC PDU, carry the identification information of the preceding and/or succeeding MAC PDU of the MAC PDU.
The method of claim 3, wherein the identification information of the preceding and/or succeeding MAC PDUs includes one of the following information or a combination thereof:

The HARQ process identification ID of the HARQ request for sending the MAC PDU, the sequence number of the data packet, one of the subframe number, frame number, symbol index, and time slot number of the air interface or a combination thereof, the physical downlink control channel PDCCH The air interface time-frequency domain resource information, the air interface time-frequency domain resource information of the physical downlink shared channel PDSCH.
The method according to claim 4, wherein, when sending each MAC PDU, the identification information of the MAC PDU precursor and/or the successor MAC PDU is carried, including:

If the identification information is the sequence number of the MAC PDU, the sequence number of the current MAC PDU is carried in the MAC PDU;

If the identification information is one of the following information or a combination thereof, the identification information is carried by performing data transmission according to the air interface timing relationship: air interface subframe number, frame number, symbol index, time slot number, and air interface time-frequency domain resource information of the PDCCH , PDSCH air interface time-frequency domain resource information;

If the identification information is the HARQ process ID, it carries the predecessor and/or successor HARQ process ID.
The method according to claim 5, wherein, if the identification information is a HARQ process ID, when forming the control information of the MAC PDU to be sent this time, the HARQ process ID of the precursor MAC PDU of the MAC PDU to be sent this time is carried;

When the data is retransmitted, it carries the HARQ process ID of the subsequent MAC PDU, or does not carry the HARQ process ID of the subsequent MAC PDU.
The method according to claim 5, wherein the HARQ process ID is sent in the downlink control information DCI through the PDCCH, or is carried and sent through the medium access control control unit MAC CE.
A data receiving method, comprising:

receive MAC PDU;

determine the bearer and/or process of the MAC PDU;

The received MAC PDUs are ordered in order according to the bearer and/or process.
The method of claim 8, wherein ordering the received MAC PDUs in order according to the bearer and/or process comprises:

For one or more upper layer PDUs transmitted by the same upper layer bearer contained in each MAC SDU, sort the MAC SDUs in the received MAC PDUs according to the order of reception;

When receiving between different processes, for one or more data packets carried by the upper layer contained in the MAC SDU in the MAC PDU sent by different processes, the upper layer bearer is the unit, and the order of reception is the MAC SDU in the received MAC PDU. Layers carry the ordering in units.
The method of claim 9, wherein, when receiving between different processes, further comprising:

When each MAC PDU is received, sorting is performed according to the identification information of the predecessor and/or successor MAC PDU carried by the MAC PDU.
The method of claim 10, wherein the identification information of the predecessor and/or the successor MAC PDU includes one of the following information or a combination thereof:

HARQ process ID for sending the MAC PDU, sequence number for data packet transmission, one of the subframe number, frame number, symbol index, and time slot number of the air interface or a combination thereof, the air interface time-frequency domain resource information of the PDCCH, and the air interface of the PDSCH Time-frequency domain resource information.
The method according to claim 11, wherein the sorting is performed according to the identification information of the predecessor and/or the successor MAC PDU carried by the MAC PDU, comprising:

If the identification information is the sequence number of the MAC PDU, it is sorted according to the sequence number of the current MAC PDU carried in the MAC PDU;

If the identification information is one of the following information or a combination thereof, the identification information carried is determined according to the air interface timing relationship during reception: subframe number, frame number, symbol index, time slot number, and air interface time-frequency domain resource information of the PDCCH of the air interface , PDSCH air interface time-frequency domain resource information;

If the identification information is the HARQ process ID, the sequence is performed according to the carried predecessor and/or successor HARQ process ID.
The method according to claim 12, wherein, if the identification information is a HARQ process ID, what carries the HARQ process ID of the precursor MAC PDU of the MAC PDU sent this time is the MAC PDU sent this time;

It carries the HARQ process ID of the subsequent MAC PDU, or does not carry the HARQ process ID of the subsequent MAC PDU, which is retransmission data.
The method of claim 12, wherein the HARQ process ID is received at DCI through PDCCH, or received through MAC CE carry.
The method of any one of claims 8 to 14, further comprising:

Perform data packet reassembly according to the sorting result, until all data packets are reassembled for delivery or if they are not received correctly, stop reassembly.
The method of claim 15, further comprising:

Each HARQ process sets up a multi-layer caching mechanism, and performs packet reassembly according to the sorting result.
The method of claim 15, further comprising:

Delivered to the upper layer in the order of each upper layer PDU in the received PDUs.
A communication device comprising:

The processor, used to read the program in the memory, controls the MAC layer to perform the following processes:

Determine the bearer and/or process of the MAC PDU sent to the lower layer;

send in order according to the bearer and/or process;

A transceiver for receiving and transmitting data under the control of the processor.
A communication device comprising:

a sending determining module, used to determine the bearer and/or process of the MAC PDU sent to the lower layer;

A sending module, configured to send in sequence according to the bearer and/or process.
A communication device comprising:

The processor, used to read the program in the memory, controls the MAC layer to perform the following processes:

receive MAC PDU;

determine the bearer and/or process of the MAC PDU;

order the received MAC PDUs in order according to the bearer and/or process;

A transceiver for receiving and transmitting data under the control of the processor.
A communication device comprising:

The receiving module is used to receive the MAC PDU;

a reception determination module for determining the bearer and/or process of the MAC PDU;

A sorting module, configured to sort the received MAC PDUs in order according to the bearer and/or process.
A computer-readable storage medium storing a computer program for executing the method of any one of claims 1 to 17.