WO2022155977A1

WO2022155977A1 - Communication method and apparatus

Info

Publication number: WO2022155977A1
Application number: PCT/CN2021/073672
Authority: WO
Inventors: 周艳; 叶进洲; 袁立平; 宗在峰
Original assignee: 华为技术有限公司
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2022-07-28
Also published as: CN116134878A

Abstract

The present application provides a communication method and apparatus. The method comprises: an access network device receives first requirement information of a service from a session management function network element; the access network device determines a processing approach for a data packet of the service according to the first requirement information, the processing approach comprising an active retransmission mechanism and/or a network coding approach; and the access network device processes the data packet of the service according to the processing approach. The method provided in the present application can solve the problem of data transmission congestion caused by the inability of existing reliability mechanisms to transmit subsequent data packets in time in face of poor air interface conditions, and can reduce the delay of data transmission and meet service requirements.

Description

Communication method and device

technical field

The present application relates to the field of wireless communication, and more particularly, to a communication method and apparatus.

Background technique

The existing reliability mechanism of data transmission is performed through layers. For example, in wireless communication, when there is packet loss or bit error on the air interface, the physical layer L1/media access control between the base station and the terminal can be used. (media access control, MAC) layer L2 performs retransmission correction to solve the problem, for example, it can be solved by the acknowledge mode (acknowledge mode, AM) supported by the radio link control (radio link control, RLC) layer between the base station and the terminal. The mode supports reliable and sequential transmission of data packets between the terminal and the base station; alternatively, a reliable connection can be established at the transport layer between the terminal and the application server to support the retransmission mechanism of data packets, for example, through the transmission control protocol (transmission control protocol). protocol, TCP) and Quick User Data Protocol Internet connections (quick UDP internet connections, QUIC), etc.

In the existing reliability mechanism, the AM mode of the RLC layer can be used between the base station and the terminal to support reliable sequential transmission of data packets, or the retransmission mechanism of the transport layer between the terminal and the application server can be used to support data packets. Reliable and sequential transmission of packets, however, when the air interface situation deteriorates, the existing reliability mechanism may cause subsequent data packets to be blocked, and subsequent data packets cannot be sent to the terminal in time, which may lead to delays in data transmission. extension increases.

SUMMARY OF THE INVENTION

The present application provides a communication method and device, which can solve the problem of blockage of data transmission caused by the inability to transmit subsequent data packets in time in the existing reliability mechanism when the air interface situation deteriorates, and can reduce the time of data transmission. to meet business needs.

A first aspect provides a communication method, comprising: an access network device receiving first demand information of a service from a session management function network element; and the access network device determining, according to the first demand information The processing method of the data packet of the service, the processing method includes: an active retransmission mechanism and/or a network coding method; the access network device processes the data packet of the service according to the processing method.

In this technical solution, the access network device receives the first demand information of the service from the network element of the session management function, determines that the processing mode of the data packet of the service is the active retransmission mechanism or the network coding mode, and then according to the processing method By processing the data packets of the service, the data transmission mode can be flexibly adjusted, the delay of data transmission can be reduced, and the service requirements can be met.

With reference to the first aspect, in some implementations of the first aspect, the first requirement information is used to indicate that the requirement of the service is high reliability and low latency.

By receiving the first demand information of the service, the access network device can know the demand of the service, make a corresponding response to the demand of the service, and adjust the transmission mode of the data packet of the service to meet the high reliability and low reliability of the service. Latency requirements.

With reference to the first aspect, in some implementations of the first aspect, when the processing method is an active retransmission mechanism, the access network device processes the data packets of the service according to the processing method, including : the access network device processes the data packets of the service according to the active retransmission mechanism and the number of active retransmissions; or, when the processing mode is the network coding mode, the access network device processes the data packets according to the The processing method for processing the data packet of the service includes: the access network device processing the data packet of the service according to the network coding method and network coding algorithm information.

With reference to the first aspect, in some implementations of the first aspect, the access network device acquires the air interface situation; wherein the access network device determines the data packet for the service according to the first requirement information The processing method includes: determining, by the access network device, the processing method according to the first requirement information and the air interface condition.

In this technical solution, the access network equipment can respond to the requirements of high reliability and low latency of the service in combination with different air interface conditions. For example, when the air interface conditions are not good, the access network equipment can adopt an active retransmission mechanism and /or network coding mode, thereby reducing the delay of data transmission and meeting the requirements of high reliability and low delay of services.

With reference to the first aspect, in some implementations of the first aspect, the air interface condition includes at least one of the following: a bit error rate, a packet loss rate, an interference period, and a congestion condition of the access network device.

With reference to the first aspect, in some implementations of the first aspect, the determining the processing method of the data packet of the service includes: when the bit error rate is greater than a first threshold, the access network device determines adopt the processing mode for the data packets of the service; or, when the packet loss rate is greater than the second threshold, the access network device determines to adopt the processing mode for the data packets of the service; or, when When the air interface is in the interference period, the access network device determines to use the processing method for the data packet of the service; or, when the access network device is in congestion, the access network device determines to The data packet of the service adopts the processing method.

In this technical solution, by distinguishing different air interface conditions, the requirements of high reliability and low latency of services can be preferably satisfied.

With reference to the first aspect, in some implementations of the first aspect, the determining the processing method of the data packet of the service includes: when the air interface condition conforms to the random packet loss model, the access network device determines The network coding method is used for the data packets of the service; or, when the air interface condition conforms to the continuous packet loss model, the access network device determines to use the active retransmission mechanism for the data packets of the service.

With reference to the first aspect, in some implementation manners of the first aspect, when the processing manner is a network coding manner, the method further includes: acquiring, by the access network device, algorithm information of the network coding; The network access device sends the network-coded algorithm information to the terminal device.

In this technical solution, when the access network device determines that the processing method for the data packet of the service is the network coding method, it can obtain the algorithm information of the network coding and send it to the terminal device, thereby saving the time for the terminal device to decode the data packet , which can reduce the delay of data transmission.

With reference to the first aspect, in some implementations of the first aspect, when the access network device is in congestion, the access network device reduces the downlink transmission rate and increases the downlink data buffer value.

In this technical solution, the access network equipment can dynamically adjust the downlink transmission rate by sensing the congestion of the access network equipment, which can relieve the congestion of the access network equipment, improve the data transmission conditions, and thus reduce the data transmission delay. .

In a second aspect, a communication method is provided, comprising: a user plane function network element receiving a first rule from a session management function network element, where the first rule indicates a processing method for a data packet of a service, and the processing method includes : active retransmission mechanism and/or network coding method; the user plane function network element receives the data packet of the service; the user plane function network element determines the processing method according to the first rule; the user The plane function network element processes the data packet of the service according to the processing method.

In this technical solution, the user plane function network element determines that the processing mode of the data packet of the service is the active retransmission mechanism or the network coding method by receiving the first rule of the service from the session management function network element, and then according to the first rule of the service. The processing mode processes the data packets of the service to realize the adjustment of the data transmission mode by the user plane functional network element, which can reduce the delay of data transmission and meet the service requirements.

With reference to the second aspect, in some implementations of the second aspect, when the processing method is an active retransmission mechanism, the user plane function network element processes the data packets of the service according to the processing method, It includes: the user plane function network element processes the data packets of the service according to the active retransmission mechanism and the number of active retransmissions; or, when the processing mode is a network coding mode, the user plane function The network element processing the data packet of the service according to the processing method includes: the user plane function network element processing the data packet of the service according to the network coding method and network coding algorithm information.

With reference to the second aspect, in some implementations of the second aspect, the user plane function network element receives a first air interface parameter report from the access network device, where the first air interface parameter report is used to describe the air interface situation; The user plane function network element determines the processing mode of the data packet of the service according to the air interface situation.

In this technical solution, the user plane functional network element obtains the air interface situation and determines the processing method of the data packet of the service according to the air interface situation, so that the transmission method of the data packet can be dynamically determined according to the air interface situation, reducing Delay of data transmission to meet business requirements.

With reference to the second aspect, in some implementations of the second aspect, the air interface condition includes at least one of the following: a bit error rate, a packet loss rate, an interference period, and a congestion condition of an access network device.

With reference to the second aspect, in some implementation manners of the second aspect, the first rule includes a correspondence between the air interface condition and the processing manner.

With reference to the second aspect, in some implementations of the second aspect, the corresponding relationship between the air interface condition and the processing method includes: when the bit error rate is greater than a third threshold adopt the processing method; or, when the packet loss rate is greater than the fourth threshold, adopt the processing method for the data packets of the service; or, when the air interface is in an interference period, apply the processing method to the data packets of the service The processing method is adopted for the packet; or, when the access network device is in congestion, the processing method is adopted for the data packet of the service.

With reference to the second aspect, in some implementations of the second aspect, the corresponding relationship between the air interface condition and the processing method includes: when the air interface condition conforms to the random packet loss model, processing the data packets of the service The network coding method is adopted; or, when the air interface condition conforms to the continuous packet loss model, the active retransmission mechanism is adopted for the data packets of the service.

With reference to the second aspect, in some implementations of the second aspect, the header of the data packet of the service includes first indication information, and the first indication information indicates whether the data packet of the service adopts the processing method, The first indication information is used by the access network device to determine a first processing manner for the data packet, where the first processing manner includes an acknowledged retransmission manner or an unacknowledged retransmission manner.

In this technical solution, by carrying the first indication information in the data packet header of the service, it is convenient to indicate whether the data packet adopts the processing method, and it is convenient for the access network device to identify and perform corresponding operations, thereby saving data transmission. delay to meet business needs.

With reference to the second aspect, in some implementation manners of the second aspect, the header of the data packet of the service further includes second indication information, and the second indication information instructs the access network device to use a non-volatile method for the data packet. The data packet is sent in an acknowledgment retransmission mode, or the second indication information instructs the access network device to send the data packet in an acknowledgment retransmission mode.

In this technical solution, by carrying the second indication information in the data packet header of the service, it is convenient to instruct the access network device to identify and perform corresponding operations. If this processing method is not adopted, the access network device will take confirmation If this processing method is adopted, the access network device will send the data packet in an unacknowledged mode to meet service requirements.

With reference to the second aspect, in some implementations of the second aspect, when the access network device is congested, the user plane function network element reduces the downlink transmission rate and increases the downlink data buffer value.

In this technical solution, the user plane functional network element can dynamically adjust the downlink transmission rate by sensing the congestion of the access network equipment, which can relieve the congestion of the access network equipment, improve the conditions of data transmission, and reduce the delay of data transmission. .

In a third aspect, a communication method is provided, comprising: an application function network element receiving a second air interface parameter report, where the second air interface parameter report is used to describe air interface conditions; The processing method of the data packet of the service, the processing method includes: an active retransmission mechanism and/or a network coding method; the application function network element processes the data packet of the service according to the processing method.

In this technical solution, the AF network element obtains the air interface situation, and decides that the processing method of the data packet is the active retransmission mechanism or the network coding method according to the air interface situation, and processes the data packet of the service, so that the AF network element can process the data packet according to the air interface. Different air interface conditions determine different processing methods to meet business requirements.

With reference to the third aspect, in some implementations of the third aspect, the air interface condition includes at least one of the following: a bit error rate, a packet loss rate, an interference period, and a congestion condition of an access network device.

With reference to the third aspect, in some implementations of the third aspect, the application function network element subscribes to the air interface situation.

Obtaining air interface information helps AF network elements to make judgments and better meet service requirements.

With reference to the third aspect, in some implementations of the third aspect, the application function network element determines a processing method for the service data packet according to the air interface situation, including: when the bit error rate is greater than a fifth threshold , the application function network element determines to use the processing method for the data packets of the service; or, when the packet loss rate is greater than the sixth threshold, the application function network element determines to use the processing method for the data packets of the service the processing method; or, when the air interface is in the interference period, the application function network element determines to use the processing method for the data packet of the service; or, when the access network device is in congestion, the The application function network element determines to use the processing method for the data packet of the service.

With reference to the third aspect, in some implementations of the third aspect, the application function network element determines a processing method for the service data packet according to the air interface condition, including: when the air interface condition conforms to a random packet loss model , the application function network element determines that the network coding method is used for the data packets of the service; or, when the air interface condition conforms to the continuous packet loss model, the application function network element determines that the data packets of the service are used. The active retransmission mechanism is adopted.

With reference to the third aspect, in some implementations of the third aspect, the header of the data packet of the service includes third indication information, and the third indication information indicates whether the data packet of the service adopts the processing method, The third indication information is used for the access network device to determine a first processing manner for the data packet, and the second processing manner includes: an acknowledged retransmission manner or an unacknowledged retransmission manner.

In this technical solution, by carrying the third indication information in the header of the data packet of the service, it is convenient to indicate whether the data packet adopts the processing method, and it is convenient for the access network device to identify and perform corresponding operations, thereby saving data transmission. delay to meet business needs.

With reference to the third aspect, in some implementation manners of the third aspect, the header of the data packet of the service further includes fourth indication information, and the fourth indication information instructs the access network device to use a non-volatile method for the data packet. The data packet is sent in an acknowledgment retransmission mode, or the fourth indication information instructs the access network device to send the data packet in an acknowledgment retransmission mode.

In this technical solution, by carrying the fourth indication information in the header of the data packet of the service, it is convenient to instruct the access network device to identify and perform corresponding operations. If this processing method is not adopted, the access network device will take the confirmation If this processing method is adopted, the access network device will send the data packet in an unacknowledged mode to meet service requirements.

In a fourth aspect, a communication method is provided, comprising: a session management function network element receiving second demand information of a service from an application function network element or a request for subscribing to air interface parameters of the application function network element, the second demand information being used It indicates that the service requires high reliability and low latency; the session management function network element sends the first information to the access network device according to the second requirement information or the request to subscribe to the air interface parameter, the first information It is used to instruct the access network device to report air interface parameters to the user plane function network element or the session management function network element, where the air interface parameters are used to describe the air interface conditions, and the air interface conditions are used to determine the validity of the data packets of the service. The processing method includes: an active retransmission mechanism and/or a network coding method.

In this technical solution, the session management function network element instructs the access network device to report the air interface parameters by receiving the second demand information of the service from the application function network element or the request of the application function network element for subscribing air interface parameters, so as to facilitate the application function The network element or the functional network element of the user plane obtains the status of the air interface and determines the processing method for the data packets of the service, so as to meet the requirements of high reliability and low delay of the service.

With reference to the fourth aspect, in some implementations of the fourth aspect, the air interface condition includes at least one of the following: a bit error rate, a packet loss rate, an interference period, and a congestion condition of an access network device.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first information is used to indicate to the access network device that when the bit error rate is greater than or equal to a seventh threshold, or the packet loss rate is greater than or equal to a seventh threshold When it is equal to the eighth threshold, or when the interference period is entered, the air interface parameter is reported to the user plane function network element or the session management function network element.

With reference to the fourth aspect, in some implementations of the fourth aspect, the session management function network element sends second information to the access network device, where the second information is used to instruct the access network device to take non-acknowledgement The data packets of the service are sent in the retransmission mode.

In this technical solution, the network element of the session management function sends the second indication information to the access network device, which is used to instruct the access network device to send the data packet equal to the service in an unacknowledged retransmission mode, which satisfies the high reliability and low delay of the service. need.

In a fifth aspect, a communication apparatus is provided, and the apparatus is an access network device, including:

a first transceiver unit, configured to receive first demand information of a service from a session management network element; a first processing unit, configured to determine a processing method for the data packets of the service according to the first demand information, the The processing method includes: an active retransmission mechanism and/or a network coding method; the first processing unit is further configured to process the data packet of the service according to the processing method.

With reference to the fifth aspect, in some implementations of the fifth aspect, the first requirement information is used to indicate that the requirement of the service is low latency and high reliability.

With reference to the fifth aspect, in some implementations of the fifth aspect, the first requirement information further includes at least one of the following: delay requirement, packet loss rate requirement, bit error rate requirement, and 5G quality of service of the service Identifier 5QI.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the first processing unit processes the data packets of the service according to the processing manner, including: the first processing unit process the data packets of the service according to the transmission mechanism and the number of active retransmissions; or, when the processing mode is the network coding mode, the first processing unit processes the data packets of the service according to the processing mode The processing includes: the first processing unit processes the data packets of the service according to the network coding mode and the algorithm information of the network coding.

With reference to the fifth aspect, in some implementations of the fifth aspect, the method further includes: the first transceiver unit is configured to acquire air interface conditions; wherein the first processing unit determines, according to the first demand information The processing method of the data packet of the service includes: the first processing unit is configured to determine the processing method according to the first requirement information and the air interface condition.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the air interface condition includes at least one of the following: a bit error rate, a packet loss rate, an interference period, and a congestion condition of the access network device.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the determining the processing manner of the data packet of the service includes: when the bit error rate is greater than a first threshold, the first processing unit, is used to determine that the processing method is used for the data packets of the service; or, when the packet loss rate is greater than the second threshold, the first processing unit is used to determine that the data packets of the service are to use the described processing method. or, when the air interface is in an interference period, the first processing unit is configured to determine to use the processing method for the data packets of the service; or, when the device is in congestion, the first processing unit A processing unit, configured to determine to adopt the processing mode for the data packets of the service.

With reference to the fifth aspect, in some implementations of the fifth aspect, the determining the processing method of the data packet of the service includes: when the air interface condition conforms to the random packet loss model, the first processing unit, is used to determine that the network coding method is used for the data packets of the service; or, when the air interface condition conforms to the continuous packet loss model, the first processing unit is used to determine that the data packets of the service use the network coding mode. Describe the active retransmission mechanism.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, when the processing manner is a network coding manner, the method further includes: the first transceiver unit, configured to acquire algorithm information of the network coding; The first transceiver unit is further configured to send the network coding algorithm information to the terminal device.

With reference to the fifth aspect, in some implementations of the fifth aspect, the apparatus further includes: when the apparatus is in congestion, the first processing unit is configured to reduce the downlink transmission rate and increase the downlink data buffer value .

In a sixth aspect, a communication device is provided, the device is a user plane function network element, comprising: a second transceiver unit configured to receive a first rule of a session management function network element, where the first rule is used to indicate a pair of The processing method of the data packet of the service, the processing method includes: an active retransmission mechanism and/or a network coding method; the second transceiver unit is used to receive the data packet of the service; the second processing unit is used to The first rule determines the processing mode; the second processing unit is further configured to process the data packets of the service according to the processing mode.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the second processing unit processes the data packets of the service according to the processing manner, including: the second processing unit process the data packets of the service according to the transmission mechanism and the number of active retransmissions; or, when the processing mode is the network coding mode, the second processing unit processes the data packets of the service according to the processing mode The processing includes: the second processing unit processes the data packets of the service according to the network coding mode and the algorithm information of the network coding.

With reference to the sixth aspect, in some implementations of the sixth aspect, it further includes: the second transceiver unit, configured to receive a first air interface parameter report from the access network device, where the first air interface parameter report is used for Describe the air interface situation; the second processing unit is configured to determine the processing mode of the data packet of the service according to the air interface situation.

With reference to the sixth aspect, in some implementations of the sixth aspect, the air interface condition includes at least one of the following: bit error rate, packet loss rate, interference period, and congestion condition of access network equipment.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the first rule includes a correspondence between the air interface condition and the processing manner.

With reference to the sixth aspect, in some implementations of the sixth aspect, the corresponding relationship between the air interface condition and the processing method includes: when the bit error rate is greater than a third threshold adopt the processing method; or, when the packet loss rate is greater than the fourth threshold, adopt the processing method for the data packets of the service; or, when the air interface is in an interference period, apply the processing method to the data packets of the service The processing method is adopted for the packet; or, when the access network device is in congestion, the processing method is adopted for the data packet of the service.

With reference to the sixth aspect, in some implementations of the sixth aspect, the corresponding relationship between the air interface condition and the processing method includes: when the air interface condition conforms to the random packet loss model, the data packets of the service are The network coding method is adopted; or, when the air interface condition conforms to the continuous packet loss model, the active retransmission mechanism is adopted for the data packets of the service.

With reference to the sixth aspect, in some implementations of the sixth aspect, the header of the data packet of the service includes first indication information, and the first indication information indicates whether the data packet of the service adopts the processing method, The first indication information is used by the access network device to determine a first processing manner for the data packet, where the first processing manner includes an acknowledged retransmission manner or an unacknowledged retransmission manner.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the header of the data packet of the service further includes second indication information, and the second indication information instructs the access network device to use a non-volatile method for the data packet. The data packet is sent in an acknowledgment retransmission mode, or the second indication information instructs the access network device to send the data packet in an acknowledgment retransmission mode.

With reference to the sixth aspect, some implementations of the sixth aspect further include: when the access network device is congested, the second processing unit is configured to reduce the downlink transmission rate and increase the downlink data buffer value.

In a seventh aspect, a communication device is provided, the device is an application function network element, comprising: a third transceiver unit configured to receive a second air interface parameter report, where the second air interface parameter report is used to describe an air interface situation; three processing units, configured to determine a processing method for the data packets of the service according to the air interface conditions, the processing methods include: an active retransmission mechanism and/or a network coding method; the third processing unit is further configured to The processing method processes the data packets of the service.

With reference to the seventh aspect, in some implementation manners of the seventh aspect, the air interface condition includes at least one of the following: bit error rate, packet loss rate, interference period, and congestion condition of access network equipment.

With reference to the seventh aspect, in some implementations of the seventh aspect, the third processing unit is configured to subscribe to the air interface situation.

With reference to the seventh aspect, in some implementations of the seventh aspect, the third unit determines, according to the air interface situation, a processing method for the data packet of the service, including: when the bit error rate is greater than a fifth threshold, The third processing unit is configured to determine to use the processing method for the data packets of the service; or, when the packet loss rate is greater than a sixth threshold, the third processing unit is configured to perform the processing on the service. the data packet of the service adopts the processing method; or, when the air interface is in an interference period, the third processing unit is configured to adopt the processing method for the data packet of the service; or, when the access network When the device is in congestion, the third processing unit is configured to use the processing method for the data packet of the service.

With reference to the seventh aspect, in some implementations of the seventh aspect, the third unit determines, according to the air interface condition, a processing method for the data packet of the service, including: when the air interface condition conforms to the random packet loss model, The third unit is configured to determine that the network coding method is adopted for the data packets of the service; or, when the air interface condition conforms to the continuous packet loss model, the third unit is configured to determine that the service is to be The data packets adopt the active retransmission mechanism.

With reference to the seventh aspect, in some implementations of the seventh aspect, the header of the data packet of the service includes third indication information, and the third indication information indicates whether the data packet of the service adopts the processing method, so The third indication information is used for the access network device to determine a second processing mode for the data packet, and the second processing mode includes: an acknowledgment retransmission mode or an unacknowledged retransmission mode.

With reference to the seventh aspect, in some implementations of the seventh aspect, the header of the data packet of the service includes fourth indication information, and the fourth indication information instructs the access network device to use non-acknowledgement for the data packet or the fourth indication information instructs the access network device to send the data packet in an acknowledgment retransmission mode.

In an eighth aspect, a communication device is provided, the device is a session management function network element, comprising: a fourth transceiver unit configured to receive second demand information of services from the application function network element or subscription of the application function network element request for air interface parameters, the second requirement information is used to indicate that the service requires low latency and high reliability; the fourth processing unit is configured to, according to the second requirement information or the request for subscribing air interface parameters, to the receiving The network access device sends first information, where the first information is used to instruct the access network device to report air interface parameters to the user plane function network element or the session management function network element, where the air interface parameters are used to describe air interface conditions, the The air interface condition is used to determine the processing method for the data packet of the service, and the processing method includes: an active retransmission mechanism and/or a network coding method.

With reference to the eighth aspect, in some implementation manners of the eighth aspect, the air interface condition includes at least one of the following: a bit error rate, a packet loss rate, an interference period, and a congestion condition of the access network device.

With reference to the eighth aspect, in some implementations of the eighth aspect, the first information is used to indicate to the access network device that when the bit error rate is greater than or equal to a seventh threshold, or the packet loss rate is greater than or equal to a seventh threshold When it is equal to the eighth threshold, or when the interference period is entered, the air interface parameter is reported to the user plane function network element or the session management function network element.

With reference to the eighth aspect, in some implementations of the eighth aspect, the fourth transceiver unit is further configured to send second information to the access network device, where the second information is used to indicate the access The network device sends the data packet of the service in an unacknowledged retransmission manner.

In a ninth aspect, a communication system is provided, comprising: a user plane function network element and a session management function network element; the session management function network element is configured to send a first rule to the user plane function network element, the first rule A rule indicates a processing method for the service data packet, the processing method includes: an active retransmission mechanism and/or a network coding method; the user plane function network element is used to receive the service data packet; according to the first A rule is used to determine the processing mode; the data packets of the service are processed according to the processing mode.

With reference to the ninth aspect, in some implementations of the ninth aspect, when the processing method is an active retransmission mechanism, the user plane function network element is used for the active retransmission mechanism and the number of active retransmissions paired. The data packets of the service are processed; or, when the processing mode is the network coding mode, the user plane function network element is used for processing the data packets of the service according to the network coding mode and the algorithm information of the network coding. to be processed.

With reference to the ninth aspect, in some implementations of the ninth aspect, the user plane function network element is further configured to receive a first air interface parameter report from the access network device, where the first air interface parameter report is used to describe the air interface situation; the user plane function network element determines the processing mode of the data packet of the service according to the air interface situation.

With reference to the ninth aspect, in some implementation manners of the ninth aspect, the air interface condition includes at least one of the following: a bit error rate, a packet loss rate, an interference period, and a congestion condition of an access network device.

With reference to the ninth aspect, in some implementation manners of the ninth aspect, the first rule includes a correspondence between the air interface condition and the processing manner.

With reference to the ninth aspect, in some implementations of the ninth aspect, the corresponding relationship between the air interface condition and the processing method includes: when the bit error rate is greater than a third threshold adopt the processing method; or, when the packet loss rate is greater than the fourth threshold, adopt the processing method for the data packets of the service; or, when the air interface is in an interference period, apply the processing method to the data packets of the service The processing method is adopted for the packet; or, when the access network device is in congestion, the processing method is adopted for the data packet of the service.

With reference to the ninth aspect, in some implementations of the ninth aspect, the corresponding relationship between the air interface condition and the processing method includes: when the air interface condition conforms to the random packet loss model, the data packets of the service are The network coding method is adopted; or, when the air interface condition conforms to the continuous packet loss model, the active retransmission mechanism is adopted for the data packets of the service.

With reference to the ninth aspect, in some implementations of the ninth aspect, the header of the data packet of the service includes first indication information, and the first indication information indicates whether the data packet of the service adopts the processing method, The first indication information is used by the access network device to determine a first processing manner for the data packet, where the first processing manner includes an acknowledged retransmission manner or an unacknowledged retransmission manner.

With reference to the ninth aspect, in some implementation manners of the ninth aspect, the header of the data packet of the service further includes second indication information, and the second indication information instructs the access network device to use a non-volatile method for the data packet. The data packet is sent in an acknowledgment retransmission mode, or the second indication information instructs the access network device to send the data packet in an acknowledgment retransmission mode.

With reference to the ninth aspect, in some implementations of the ninth aspect, when the access network device is congested, the user plane function network element is further configured to reduce the downlink transmission rate and increase the downlink data buffer value.

A tenth aspect provides a communication system, comprising: an application function network element and a session management function network element; the application function network element is configured to send second demand information of a service or subscribe to an air interface to the session management function network element parameter request, the second requirement information is used to indicate that the service requires high reliability and low latency; the session management function network element is used to send the request to the connection according to the second requirement information or the request for subscribing air interface parameters. The network access device sends first information, where the first information is used to instruct the access network device to report air interface parameters to the user plane function network element or the session management function network element, where the air interface parameters are used to describe air interface conditions, the The air interface situation is used to determine the processing method for the data packet of the service, and the processing method includes: an active retransmission mechanism and/or a network coding method; the application function network element is also used to receive the second air interface parameter report, so the The second air interface parameter report is used to describe the air interface situation; the application function network element determines a processing method for the data packet of the service according to the air interface situation, and the processing method includes: an active retransmission mechanism and/or a network coding method; The application function network element processes the data packet of the service according to the processing method.

With reference to the tenth aspect, in some implementation manners of the tenth aspect, the air interface condition includes at least one of the following: a bit error rate, a packet loss rate, an interference period, and a congestion condition of an access network device.

With reference to the tenth aspect, in some implementations of the tenth aspect, when the bit error rate is greater than a fifth threshold, the application function network element is configured to determine to use the processing method for the data packet of the service; Or, when the packet loss rate is greater than a sixth threshold, the application function network element is used to determine to use the processing method for the data packets of the service; or, when the air interface is in an interference period, the application function The function network element is used to determine to use the processing method for the data packet of the service; or, when the access network device is in congestion, the application function network element is used to determine to use the processing method for the data packet of the service. the processing method described above.

With reference to the tenth aspect, in some implementations of the tenth aspect, when the air interface condition conforms to the random packet loss model, the application function network element is configured to determine to use the network coding method for the data packet of the service or, when the air interface condition conforms to the continuous packet loss model, the application function network element is configured to determine to use the active retransmission mechanism for the data packet of the service.

With reference to the tenth aspect, in some implementations of the tenth aspect, the header of the data packet of the service includes third indication information, and the third indication information indicates whether the data packet of the service adopts the processing method, so The third indication information is used for the access network device to determine a second processing mode for the data packet, and the second processing mode includes: an acknowledgment retransmission mode or an unacknowledged retransmission mode.

With reference to the tenth aspect, in some implementation manners of the tenth aspect, the header of the data packet of the service further includes fourth indication information, and the fourth indication information instructs the access network device to use a non-volatile method for the data packet. The data packet is sent in an acknowledgment retransmission mode, or the fourth indication information instructs the access network device to send the data packet in an acknowledgment retransmission mode.

With reference to the tenth aspect, in some implementation manners of the tenth aspect, the first information is used to indicate to the access network device that when the bit error rate is greater than or equal to a seventh threshold, or the packet loss rate is greater than or equal to a seventh threshold When it is equal to the eighth threshold, or when the interference period is entered, the air interface parameter is reported to the user plane function network element or the session management function network element.

In an eleventh aspect, a computer-readable medium is provided, the computer-readable medium is stored with a computer program (also referred to as code, or instruction) when it runs on a computer, causing the computer to perform any aspect or any of the above. A method in any possible implementation of an aspect.

A twelfth aspect provides a communication chip, in which instructions are stored that, when executed on a computer device, cause the communication chip to perform the method in any of the above-mentioned aspects or any possible implementation manner of any of the aspects.

A thirteenth aspect provides a computer program product comprising instructions, the instructions, when run on a computer, cause the computer to perform the method in any of the above-mentioned aspects or any possible implementations of any of the aspects.

Description of drawings

1 is a schematic diagram of the architecture of a 5G system applying the present application;

2 is a schematic flowchart of a communication method provided by the present application;

3 is a schematic flowchart of another communication method provided by the present application;

4 is a schematic flow chart of still another communication method provided by the present application;

5 is a schematic block diagram of applying the computer equipment provided by the present application;

FIG. 6 is a schematic block diagram of a communication apparatus provided by the present application.

Detailed ways

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

As shown in FIG. 1 , an application scenario to which the communication method of the present application can be applied may include a UE101, a radio access network (RAN) device 102, a user plane function (UPF) network element 103, a connection access and mobility management function (AMF) 104, session management function (SMF) network element 105, policy control function (PCF) network element 106, application function (application function) , AF) 107, network capability exposure function entity (network exposure function, NEF) network element 108, unified data management (unified data management, UDM) network element 109, authentication authorization service function (authentication server function, AUSF) network element 110, A network slice selection function (NSSF) network element 111 and a data network (DN) 112.

The communication system shown in FIG. 1 may be a 5th generation (5G) communication network.

The UE may also be referred to as a terminal device. Terminal devices may communicate with one or more core networks (CNs) via RAN devices. A terminal device may be referred to as an access terminal, terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless network device, user agent, or user equipment. The terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a wireless communication capable Handheld devices, computing devices or other devices connected to wireless modems, in-vehicle devices, wearable devices or IoT, end devices in vehicle networks, home gateways (CPE) and any form of end device in future networks Wait.

The RAN device may be a radio access network (RAN) device. An example of a RAN device is a base station (BS).

A base station, also known as a base station device, is a device that connects a terminal to a wireless network, including but not limited to: transmission reception point (TRP), 5G node B (gNB), evolved node B ( evolved node B (eNB), radio network controller (RNC), node B (NB), base station controller (BSC), base transceiver station (BTS), Home base station (for example, home evolved nodeB, or home node B, HNB), base band unit (base band unit, BBU), or Wifi access point (access point, AP), or small base station equipment (pico), etc.

It should be understood that the present application does not limit the specific type of the base station. In systems using different wireless access technologies, the names of devices with base station functions may vary. For convenience of description, in this application, the above-mentioned apparatuses for providing wireless communication functions for terminals are collectively referred to as base stations.

UPF: It can be understood as the naming of user plane functional network elements in the 5G architecture. Among them, the user plane function network elements mainly include the following functions: data packet routing and transmission, packet detection, service consumption reporting, QoS processing, legal interception, uplink packet detection, downlink data packet storage and other user plane related functions.

AMF: It can be understood as the naming of mobility management network elements in the 5G architecture. The mobility management network element mainly includes the following functions: connection management, mobility management, registration management, access authentication and authorization, reachability management, security context management and other functions related to access and mobility.

SMF: It can be understood as the naming of session management network elements in the 5G architecture. Among them, the session management network element mainly performs functions such as session management, execution of control policies issued by PCF, selection of UPF, and allocation of UE IP addresses.

PCF: It can be understood as the naming of policy control function network elements in the 5G architecture. Among them, the policy control function network element is mainly responsible for policy control functions such as charging for sessions and service flow levels, quality of service (QoS) bandwidth guarantee, mobility management, and UE policy decision-making. In this system, the PCFs connected to AMF and SMF are access and mobility control PCF (PCF for access and mobility control, AM PCF) and SM PCF respectively. In actual deployment, AM PCF and SM PCF may not be the same PCF entity.

UDM: It can be understood as the naming of unified data management network elements in the 5G architecture. Among them, the unified data management network element mainly includes the following functions: unified data management, supporting authentication credential processing in 3GPP authentication and key agreement mechanism, user identity processing, access authorization, registration and mobility management, subscription management, short message management, etc.

AUSF: It can be understood as the naming of the authentication and authorization service function network elements in the 5G architecture. The authentication and authorization service function network element is responsible for authenticating and authorizing the access of the terminal device.

DN: Data network, used to identify the operator's network access point name. In this application, the DN may also include authentication, authorization, and accounting (AAA) server functions, responsible for performing secondary authentication on users.

AF: It can be understood as the naming of application function network elements in the 5G architecture. Among them, the application function network element mainly conveys the requirements of the application side to the network side, for example, quality of service (quality of service, QoS) requirements and the like. The AF network element may be a third-party functional entity, or may be an application service deployed by an operator, such as an IP multimedia subsystem (IP multimedia subsystem, IMS) voice call service. In this application, a multi-access edge computing (MEC) platform or an application server can be used as an AF network element to communicate with the 5G core network. The AF network element can directly interface with the PCF network element, or, the AF network element can also interface with the PCF network element through a network capability exposure function (network exposure function, NEF). In the scenario where the AF network element directly interfaces with the PCF network element, the method for the AF network element to interface with the PCF network element through the NEF network element can be easily obtained in combination with the prior art and FIG. 1 of this application.

It can be understood that the above network elements or functions may be network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (eg, a cloud platform). Optionally, the foregoing network element or function may be implemented by one device, or may be implemented jointly by multiple devices, or may be a functional module in one device, which is not specifically limited in this embodiment of the present application.

The functions of each interface are described as follows:

N1: The interface between the AMF and the UE, irrespective of access, used to deliver QoS control rules to the UE, etc.

N2: The interface between the AMF and the RAN, used to transmit radio bearer control information from the core network side to the RAN, etc.

N3: The interface between the RAN and the UPF, used to transfer user plane data between the RAN and the UPF.

N4: The interface between the SMF and the UPF, used to transmit information between the control plane and the user plane, including controlling the distribution of forwarding rules for the user plane, QoS control rules, traffic statistics rules, etc., and reporting of information on the user plane.

N5: The interface between the AF and the PCF, used for application service request delivery and network event reporting.

N6: The interface between UPF and DN connection, used for transferring user plane data between UPF and DN.

N7: The interface between the PCF and the SMF is used to deliver a protocol data unit (protocol data unit, PDU) session granularity and a business data flow granularity control policy.

N8: The interface between the AMF and the UDM, used by the AMF to obtain the subscription data and authentication data related to access and mobility management from the UDM, and to register the UE's current mobility management related information to the UDM.

N9: The interface between UPF and UPF, such as the interface between the visited-policy control function (V-PCF) and the home-policy control function (H-PCF), or the interface between the visited-policy control function (V-PCF) and the home-policy control function (H-PCF). The interface between the UPF connected to the DN and the UPF connected to the RAN is used to transfer user plane data between the UPFs.

N10: an interface between the SMF and the UDM, used for the SMF to obtain the session management-related subscription data from the UDM, and the SMF to register the UE's current session-related information to the UDM.

N11: The interface between the SMF and the AMF, used to transfer the PDU session tunnel information between the RAN and the UPF, the control message sent to the UE, the radio resource control information sent to the RAN, and the like.

N12: The interface between the AMF and the AUSF, used to authenticate the terminal equipment.

N13: The interface between the UDM and the AUSF, used to transmit authentication parameters and transmit authentication results.

N14: Interface between two AMFs to pass user context to support mobility across AMFs.

N15: The interface between the PCF and the AMF, used for delivering UE policies and access control related policies.

N22: The interface between AMF and NSSF, used for slice selection and obtaining slice information allowed by the terminal.

N33: The interface between NEF and AF, which is used for third-party applications to obtain capability opening information from the mobile network and provide application information to the mobile network.

It should be noted that the name of each network element (eg, PCF network element, AMF network element, etc.) included in FIG. 1 is only a name, and the name does not limit the function of the network element itself. In the 5G network and other future networks, the above-mentioned network elements may also have other names, which are not specifically limited in this embodiment of the present application. For example, in a 6G network, some or all of the above-mentioned network elements may use the terminology in 5G, or other names, etc., which will be uniformly described here, and will not be repeated below.

It should be understood that the present application is not limited to the system architecture shown in FIG. 1 . For example, a communication system to which the communication method of the present application can be applied may include more or less network elements or devices. The device or network element in FIG. 1 may be hardware, software divided by functions, or a combination of the above two. The devices or network elements in FIG. 1 may communicate with each other through other devices or network elements.

It should be understood that, in the embodiments described in this application, the UE and the AF network element have already established an application layer connection. For example, the AF network element is a video server, and the application layer connection established between the UE and the AF network element is used for the UE to communicate with the AF network element. The network element requests to play a VR video. The application layer connection between the UE and the AF network element may be sent through the PDU session established by the UE in the 5G network, that is, the UE uses the IP address corresponding to the PDU session to communicate with the AF network element. In this embodiment of the present application, the network element that communicates with the 5G core network and the video server are the same network element, but in actual deployment, they may be different network elements, which are not limited in this application.

A schematic flowchart of a communication method according to an embodiment of the present application is shown in FIG. 2 . It should be understood that FIG. 2 shows steps or operations of the communication method, but these steps or operations are only examples, and the present application may also perform other operations or variations of the respective operations in FIG. 2 .

S201, the PCF network element receives the second demand information of the service from the AF network element.

Exemplarily, the second requirement information of the service may be used to indicate that the requirement of the service is high reliability and low latency. For example, high reliability means that the service has accuracy requirements for no packet loss rate or good packet rate. Specifically, it may be: The non-packet loss rate or the good packet rate reaches 99.999%, which is not limited in this application; for example, low latency refers to the time-consuming requirement of the service for data transmission, specifically, it can be 1ms, or 10ms, etc. Yes, this application does not make any limitation on this. The second demand information of the service may include indication information for indicating that the service is high reliability and low latency. Further, the demand information of the service may also include: the maximum delay value required by the service, and information such as the maximum packet loss rate or the maximum bit error rate that the service can accept.

Exemplarily, the second requirement information may further include description information of the service, such as an application identifier or a packet filter used to describe the data flow of the service, such as information such as a quintuple.

Exemplarily, the second demand information may further include other QoS information, for example, the maximum bandwidth demand required by the service, and the like.

S202, the PCF network element determines a policy and charging control PCC rule based on the second demand information of the service, and sends the PCC rule to the SMF network element.

The PCC rule may include information such as the maximum delay, maximum bit error rate or maximum packet loss rate that the service can accept. The PCC rule may also include indication information for indicating that the service is low-latency and high-reliability.

S203, the base station receives an N2 message from the SMF network element, where the N2 message includes the first requirement information.

The SMF network element determines the first requirement information according to the PCC rule.

The N2 message also includes information instructing the base station to create a radio bearer for the data packet of the service.

The first requirement information is used to indicate that the service is a low-latency and high-reliability service. The first requirement information may include a 5G quality of service identifier (5G QoS identifier, 5QI) of the service, and the first requirement information may also include a delay requirement, a packet loss rate requirement, or a bit error rate requirement of the service, and the like.

The base station determines a processing method for the data packet of the service according to the content of the first requirement information, and the processing method may include: an active retransmission mechanism and/or a network coding method.

The base station determines the processing method of the data packets of the service, including:

In an implementation manner, the base station receives the processing method of the service from the SMF network element, and correspondingly, the N2 message also includes the processing method of the service. When the processing mode of the data packet of the service is the active retransmission mechanism, the N2 message may further indicate the number of times of the active retransmission; or, when the processing mode of the data packet of the service is the network coding mode, the The N2 message may further indicate network coding algorithm information, where the network coding algorithm information is used to indicate the network coding method. For example, common network coding algorithms include: Hamming code, RS (reed-solomon) code, BCH code, etc. . In addition to the network coding algorithm, the algorithm information of network coding also includes the specific parameters of the algorithm. For example, taking RS code as an example, the parameters of the algorithm include the generator matrix. The specific parameters that the network coding algorithm needs to include is determined according to the specific algorithm. Repeat. In specific implementation, the N2 message can carry a number, which indicates a network coding algorithm and its parameter information, and the base station can determine the network coding algorithm and its parameters according to the number. For example, the base station can configure the number and network coding The corresponding relationship between the algorithms and parameters, or, the number points to well-known (ie standardized) network coding algorithms and parameters. It should be noted that when network coding is used, the N2 message can only carry the algorithm information of network coding (that is, the algorithm information carrying network coding implies the use of network coding), or it can indicate the use of network coding and further Carry the algorithm information of network coding.

In this implementation manner, optionally, the N2 message further includes a non-access stratum (non access stratum, NAS) message sent to the UE. If the SMF network element determines to use a specific network coding method to process the data packets of the service, the SMF network element may include the network coding algorithm information in the NAS message, so that the UE can decode the data packets according to the network coding algorithm. . Optionally, if the active retransmission mechanism is adopted, the NAS message may further indicate that the QoS flow adopts the active retransmission mechanism, or instruct the terminal to discard the repeated data packets.

Or, in another implementation manner, the base station determines the processing method of the service according to the first requirement information, that is, the N2 message does not include the processing method of the service. The base station can determine how to process the service according to a locally configured policy.

When the base station determines to use the active retransmission mechanism for the data packets of the service, the base station further determines the number of active retransmissions. For example, the base station may determine the number of active retransmissions according to the air interface situation; When the data packet adopts the network coding mode, the base station can also determine the algorithm information of the network coding. For example, the base station can determine the algorithm information of the network coding according to the air interface situation. The base station may configure the algorithm information of network coding, so as to determine the algorithm information of network coding to be used when the data packet of the service is processed in the network coding manner.

Optionally, the SMF network element can use the QoS parameter to indicate that the service is a low-latency high-reliability service. For example, a specific 5QI is used to indicate that the service is a low-latency and high-reliability service, or, when the QoS parameter is When the packet delay budget (PDB) is less than the specified threshold, it indicates that the service flow requires low delay and high reliability.

Optionally, the SMF network element carries additional indication information to indicate that the service flow requires low latency and high reliability or needs to be processed using this processing method.

Optionally, the base station may further determine the processing mode adopted for the data packets of the service according to specific air interface conditions. E.g:

When the air interface condition is #A, the base station adopts the active retransmission mechanism, that is, the base station actively copies N copies of the received downlink data packet, where N ≥ 1, and sends N+1 copies of the data to the UE through the air interface. When one of the N+1 data packets is successfully sent to the UE through the air interface, no packet loss will result.

The above method can avoid that in the traditional acknowledgment retransmission method, the base station needs to wait for the timer to expire and retransmit, resulting in subsequent data packets being blocked and unable to be sent to the UE in time, thus failing to meet the ultra-low latency requirement of the service. In addition, since the base station sends multiple identical data packets, the possibility of packet loss is reduced, thereby meeting the requirements of low latency and high reliability of services.

When the air interface condition is #B, the base station performs network coding on the downlink data packets.

Optionally, the SMF network element may send network coding parameters to the base station, for example, network coding algorithm information.

Through the above method, the UE can still restore the original data packet in the case of packet loss, and determines the network coding method by receiving the network coding algorithm information from the SMF network element, saving the UE to decode and obtain the original data packet time, thereby reducing the data transmission delay. Specifically, the network coding method increases the redundancy of data transmission. Even in the process of data transmission, the UE cannot receive all the data packets, but the UE can restore some of the received data packets in combination with the network coding method. The original data packet, thereby reducing the data transmission delay.

Under the condition that the air interface condition is #C, the base station can first perform network coding on the downlink data, and then use an active retransmission method for the coded data, that is, send N+1 data packets to the UE.

Through the above method, the base station can combine the network coding method and the active retransmission mechanism to reduce the delay of data transmission.

It should be understood that the air interface condition includes at least one of the following: a bit error rate, a packet loss rate, an interference period or a congestion condition of a base station.

It should be understood that the above air interface conditions #A, #B and #C can be any combination of the parameters exemplified below, including but not limited to: #A: parameter one; #A: parameter two; #B : parameter one; #B: parameter one and two; #C: parameter three. Among them, parameter one: the bit error rate is greater than the first threshold; parameter two: the packet loss rate is greater than the second threshold; parameter three: the current air interface is in the interference period; parameter four: the base station is in a congested state. The above-described combination of various parameters is only understood as an example, and should not be regarded as the combination of parameters only includes the described ones. The above-mentioned first, second, third and fourth are used only for the purpose of differentiation and have no limiting effect.

Optionally, when the air interface condition is the air interface damage model and conforms to the random packet loss model, the base station determines to use network coding for the data packets of the service, or, when the air interface condition is the air interface damage model and conforms to the continuous packet loss model , the base station determines to use an active retransmission mechanism for the data packets of the service.

It should be understood that this application does not specifically limit which processing method needs to be adopted in what air interface situation. Specifically, when the air interface situation is #A, the active retransmission mechanism can be selected, or when the air interface situation is #B, the active retransmission mechanism can be selected, or when the air interface situation is #C, the active retransmission mechanism and A combination of network coding. This application does not make any limitation to this.

It should be understood that the PCC rule sent by the PCF network element to the SMF network element may be referred to as a second rule. Optionally, the second rule includes a processing method indicating a data packet of a service, and the processing method includes: an active retransmission mechanism and / or network coding method.

When the SMF network element instructs the base station to process the service, the SMF network element may send the correspondence between the air interface condition and the processing method to the base station.

S204, the base station configures a radio bearer mode for the data packet corresponding to the service flow.

Specifically, when the base station determines to use the active retransmission mechanism or the network coding method for the data packet of the service flow, in an implementation manner, the base station configures the bearer in the unacknowledged mode (that is, the UM mode) for the data packet of the service flow ); or, when the base station determines that the data packet of the service does not adopt the active retransmission mechanism or the network coding method, the base station can configure the bearer of the acknowledgement mode (that is, the AM mode) for the data packet of the service flow, that is, when the base station is for the downlink When the data packets use the active retransmission mechanism or network coding method, the base station sends these data packets to the UE through the bearer corresponding to the unacknowledged mode. When the base station does not use the active retransmission mechanism or network coding method for downlink data packets, the base station will These data packets are sent to the UE through the bearer corresponding to the acknowledgment mode.

When configuring the radio bearer, if the network coding method is adopted, the base station can send the network coding algorithm information to the UE through the bearer configuration message, so that the UE can decode the received downlink data packet. When the base station determines to use network coding to process service data packets, if the network coding algorithm information changes, the base station needs to transmit the new network coding algorithm information to the UE so that the UE can decode the downlink data packets.

Optionally, the base station may receive an air interface parameter measurement report sent by the UE, where the report is used to describe the air interface situation. The base station determines the air interface condition through the air interface parameter measurement report sent by the UE, and further determines the processing mode of the data packet of the service in combination with the first demand information and the air interface condition.

Optionally, when the base station is in congestion, the base station can reduce the downlink transmission rate and increase the downlink data buffer value to avoid aggravating the congestion of data transmission.

S205, the base station sends a response message to the SMF network element. Optionally, the response message may be used to report the processing mode of the data packet of the service by the base station.

S206, the SMF network element sends a response message to the PCF network element. Optionally, the response message is used to report the processing mode of the data packet of the service by the base station.

S207, the PCF network element sends a response message to the AF network element. Optionally, the response message is used to report the processing mode of the data packet of the service by the base station.

S208, the base station receives the downlink data packet and processes the downlink data packet.

After determining the processing mode of the data packet of the service, the base station processes the data packet of the service according to the determined processing mode.

When the processing mode is the active retransmission mechanism, the base station processes the data packets of the service according to the processing mode, including: the base station processes the data packets of the service according to the active retransmission mechanism and the number of active retransmissions; or, when When the processing mode is the network coding mode, the base station processes the data packets of the service according to the processing mode, including: the base station processes the data packets of the service according to the network coding mode and the algorithm information of the network coding. It should be noted that the number of active retransmissions may be determined by the base station, or may be determined by notification from the SMF network element, which is not limited in this embodiment of the present application.

Optionally, the base station may also determine the air interface condition by obtaining the air interface parameter measurement report sent by the UE, and then combine the first demand information and the air interface condition to determine the processing method of the data packet of the service.

S209, the UE receives the downlink data packet.

If the base station adopts an active retransmission mechanism, the UE needs to check whether the received data packets are repeated, and if so, discard the repeated data packets. The UE may perform data packet repetition detection according to the information of the application layer. For example, if the application layer information of the data packet includes the sequence number of the data packet, the UE may determine whether the data packet is repeated according to the sequence number. The UE may also determine whether the data packets are repeated through the number of the packet-free data convergence protocol (packet data convergence protocol, PDCP) layer, for example, the base station uses the same PDCP number when sending the repeated data packets.

If the base station adopts the network coding method, the UE decodes the data packet according to the received network coding algorithm information, so as to obtain the original data packet.

In the technical solution of the above embodiment, the base station determines the processing method of the data packet of the service by receiving the first demand information sent by the SMF network element, and can also determine the air interface situation by obtaining the air interface parameter measurement report sent by the UE, And combined with the first demand information to determine the processing mode of the data packet. In this way, the base station can determine the processing mode of the data packet of the service according to the real-time change of the air interface state.

A schematic flowchart of a communication method according to another embodiment of the present application is shown in FIG. 3 . It should be understood that FIG. 3 shows steps or operations of the communication method, but these steps or operations are only examples, and the present application may also perform other operations or variations of the respective operations in FIG. 3 .

S301-S302 are connected with the foregoing steps S201-S202, and are not repeated here.

S303, the SMF network element receives the PCC rule sent by the PCF network element, and determines, based on the PCC rule, to enable an enhanced reliability mechanism for processing data packets of the service, where the reliability mechanism includes: an active retransmission mechanism and/or network coding Way.

The SMF network element may determine the processing method according to the PCC rule. For example, the SMF network element determines whether to enable the active retransmission mechanism and/or the network coding method according to the maximum delay and/or 5QI of the service in the PCC rule.

For example, if the maximum delay required by the service is less than the air interface retransmission response time, the SMF network element determines that the base station uses the unacknowledged retransmission mode to process the service data packets.

Optionally, the SMF network element may determine to enable the active retransmission mechanism according to the maximum packet loss rate. For example, further, the SMF network element may further determine the number of active retransmissions according to the maximum packet loss rate.

Optionally, the SMF network element may determine the network coding method according to the maximum packet loss rate. The network coding method can increase the redundancy of the data, that is, when the UE receives the data packet processed by the network coding method, the packet loss phenomenon occurs during the transmission process, and the UE can also restore the original data packet according to the received data packet. the data package. For example, when the maximum packet loss rate is too large, in order to reduce the possibility of packet loss, the SMF network element can determine the network coding method, thereby reducing the possibility of packet loss.

S304, the UPF network element receives the first rule from the SMF network element, where the first rule is used to indicate a processing method for the service data packet, and the processing method includes an active retransmission mechanism and/or a network coding method.

Optionally, the first rule may include a correspondence between the air interface situation and the processing mode of the data packet of the service. Specifically, the correspondence includes:

When the bit error rate is greater than the first threshold, or the packet loss rate is greater than the second threshold, or the air interface is in an interference period, or when the base station is congested, it is determined to use this processing method for the data packets of the service.

Optionally, the correspondence between the air interface status and the processing mode of the service data packet may include:

When the air interface condition is the air interface damage model and conforms to the random packet loss model, it is determined to use the network coding method for the data packets of the service, or, when the air interface condition is the air interface damage model and conforms to the continuous packet loss model, it is determined to The data packet of the above service adopts an active retransmission mechanism.

When the SMF network element decides to enable the enhanced reliability mechanism, the SMF network element configures and sends the first rule to the UPF network element.

Based on the first rule, the UPF network element determines to adopt an enhanced processing method for the data packet of the service. For example, when the processing method is an active retransmission mechanism, the UPF network element processes the data packet of the service according to the processing method, Including: the UPF network element processes the data packets of the service according to the active retransmission mechanism and the number of active retransmissions; or, when the processing mode is the network coding mode, the UPF network element performs the processing on the data packets of the service according to the processing mode. The processing includes: the UPF network element processes the data packets of the service according to the network coding mode and the algorithm information of the network coding. It should be noted that the number of active retransmissions may be determined by the UPF network element, or may be indicated by the first rule, which is not limited in this embodiment of the present application.

S305, the SMF network element sends an N2 message to the base station, where the N2 message is used to instruct the base station to establish a radio bearer corresponding to the service.

The N2 message includes first information, and the first information is used to instruct the base station to report air interface parameters to the UPF network element or the SMF network element. The air interface parameters are used to describe the air interface conditions, and the air interface conditions can be used to determine the validity of the data packets of the service. how to handle it. For example, the SMF network element instructs the base station to report information such as packet loss rate, bit error rate, and base station congestion indication caused by non-congestion. The first information may indicate the triggering condition for the base station to report the air interface parameters, for example, reporting the air interface parameters when the air interface condition reaches a certain threshold, for example, sending the air interface parameters when the packet loss rate reaches the first threshold, and when the bit error rate reaches the second threshold When sending air interface parameters, etc.

The N2 message includes second information, and the second information is used to indicate that the base station has actively retransmitted the service flow corresponding to the service or adopted network coding, or the second information is used to indicate that the base station has the service of the service. Streams do not use AM mode. The SMF can instruct the base station not to adopt the AM mode for the service flow of the service through the QoS parameter of the service, such as a specific 5QI, and can also express the requirement through a special instruction.

Optionally, the N2 message may further include third information, where the third information is used to instruct the base station to send the data packets of the QoS flow in a dual connectivity (dual connectivity, DC) manner.

Optionally, the N2 message may further include fourth information, and the fourth information may further specify the bandwidth when the QoS flow is sent through the primary and secondary base stations respectively, for example, the primary base station link 1M bandwidth, the secondary base station link 1M bandwidth (total 2M bandwidth). Correspondingly, the base station may configure the air interface resources of the primary and secondary base stations for the QoS flow through dual connectivity transmission. If the downlink offload is performed by the UPF network element, the base station sends the downlink tunnel information of the primary base station and the secondary base station to the SMF network element, so that the SMF network element can further send it to the UPF network element, and the SMF network element can indicate the UPF network element. The principle of offloading, For example, the data packets of the service are sent on two links according to a certain bandwidth ratio (for example, the bandwidths of the two DC links are the same), and the UPF network element divides the downlink data packets according to the principle of diversion.

Optionally, the N2 message further includes a NAS message sent to the UE. If the SMF network element determines to use a specific network coding method to process the data packets of the service, the SMF network element may include the network coding algorithm information in the NAS message, so that the UE can decode the data packets according to the network coding algorithm. . Optionally, if the active retransmission mechanism is adopted, the NAS message may further indicate that the QoS flow adopts the active retransmission mechanism, or instruct the terminal to discard the repeated data packets.

S306, the base station configures a radio bearer for the service.

In step S305, according to the N2 information sent by the SMF network element to the base station, the base station can process the service flow of the service as follows:

Manner #1: The base station determines according to the second information that the AM mechanism is not enabled for the QoS flow. In this method, the base station does not enable the reliable retransmission mechanism for the downlink data packets corresponding to the QoS flow, so as to avoid blocking the transmission of subsequent data packets due to packet loss.

Method #2: For each downlink data packet, the base station decides whether to enable the AM mechanism according to whether the UPF network element has enabled the enhanced reliability mechanism (ie, the active retransmission method and/or the network coding method to process the data packet). The base station can determine whether the UPF adopts the enhanced reliability mechanism according to the downlink data packet header, that is, the indication information in the GPRS tunnel protocol user plane (GTP-U). If the packet header of the data packet indicates that the UPF network element is enabled If the enhanced reliability mechanism is used, the base station directly sends the data packet to the UE in an unacknowledged manner. Alternatively, if the header of the data packet indicates that the UPF network element does not use the enhanced reliability mechanism, the base station sends the data packet to the UE in an acknowledgement mode (ie, AM mode).

It should be noted that the base station may configure different radio bearers for the QoS flow of the service in two modes: AM mode and non-AM mode. Specifically, when the data packet of the QoS flow is sent in the AM mode, the base station sends the data packet through the radio bearer corresponding to the AM mode; when the data packet is sent in the non-AM mode, the base station corresponds to the data packet in the non-AM mode the radio bearer for transmission. The terminal can determine whether the radio bearer corresponds to the AM mode or the non-AM mode according to the configuration of the radio bearer.

If the N2 message further includes the third information, the base station allocates resources of the primary and secondary base stations for the service according to the third information. If the fourth information indicates the ratio information sent by the primary and secondary base stations, the base station configures radio bearers according to the proportional information. If the UPF offloads downlink services, the base station allocates downlink tunnel information of the primary and secondary base stations respectively.

S307, the base station sends a response message.

Optionally, the base station sends the downlink tunnel information of the primary and secondary base stations to the SMF network element.

Optionally, the base station may send the radio bearer configuration result to the SMF network element, for example, whether the bearer of the primary and secondary base stations is successfully allocated.

S308, the SMF network element sends a response message to the PCF network element. Optionally, the response message is used to report the processing mode of the data packet of the service by the base station.

S309, the PCF network element sends a response message to the AF network element. Optionally, it is used to report the processing mode of the data packet of the service by the base station.

S310, the base station reports air interface parameters to the UPF network element or the SMF network element.

According to the content of the first information, the base station reports the first air interface parameter report to the UPF network element or the SMF network element, where the first air interface parameter report is used to describe the air interface situation. When sending the first air interface parameter report to the UPF network element, the base station may send the first air interface parameter report through GTP-U.

Optionally, the first information sent by the SMF network element may carry a trigger condition for specifying the base station to send air interface parameters, for example, the frequency of sending air interface parameters, or, when the packet loss rate and the bit error rate reach a certain threshold, and when the Sent when the base station is congested, etc. The base station reports air interface parameters to the UPF network element or the SMF network element according to the trigger conditions set by the SMF network element. If the SMF network element instructs the base station to perform air interface measurement, the base station can also start the air interface measurement (for how to perform the air interface measurement, please refer to the existing protocol, which will not be repeated here), and report the measured result to the UPF network element or the SMF network element.

Steps S311a and S311b are the steps in which the SMF network element receives and processes the air interface parameter report:

Step 311a, the SMF network element processes air interface parameters.

The SMF network element processes the air interface parameters to determine the air interface condition. For example, the air interface condition may be that the bit error rate is greater than a certain threshold, or the air interface condition may be that the packet loss rate is greater than a certain threshold, or the air interface condition may be that the base station is congested, or whether the current air interface is in the interference period. The SMF network element can also perform more complex processing on the air interface parameters, for example, input the received air interface parameters into the machine learning software, and the machine learning software outputs the result, and the SMF network element determines the air interface condition according to the output result.

Step 311b, the SMF updates the first rule.

When the SMF network element determines that the first rule needs to be updated according to the situation of the air interface, the SMF network element sends the updated first rule to the UPF network element. For example, when the bit error rate is greater than a certain threshold or the packet loss rate is greater than a certain threshold, the SMF network element determines that the number of active retransmissions needs to be increased, or the network coding method needs to be adjusted (such as increasing the redundancy ratio). The element re-determines the first rule, and sends the updated first rule to the UPF network element, so that the UPF network element can process the data packet of the service according to the updated first rule.

Optionally, when the air interface condition becomes the air interface damage model and conforms to the random packet loss model, the SMF network element determines to change the processing mode of the data packets of the service to the network coding mode; or when the air interface condition becomes the air interface damage When the model is consistent with the continuous packet loss model, the SMF network element determines that the processing mode of the data packets of the service becomes the active retransmission mechanism. At this time, the SMF network element updates the first rule, so as to notify the UPF network element to process the data packets of the service according to the new processing mode.

Optionally, when the SMF network element senses that the base station is congested, the SMF network element may change the first rule, so as to notify the UPF network element to reduce the downlink transmission rate and increase the size of the downlink data buffer. The purpose of reducing the downlink transmission rate is to reduce the data packets sent to the base station to relieve air interface congestion, and to increase the buffer is to reduce the buffer overflow and packet loss on the UPF network element due to the slowdown.

S311c, the UPF network element processes air interface parameters.

The UPF network element processes the air interface parameters to determine the air interface condition. For example, the air interface condition may be that the bit error rate is greater than a certain threshold, or the air interface condition may be that the packet loss rate is greater than a certain threshold, or the air interface condition may be that the base station is congested, or whether the current air interface is in the interference period. The UPF network element can also perform more complex processing on the air interface parameters. For example, the air interface parameters are input into the machine learning software, and the machine learning software outputs the result, and the UPF network element determines the air interface condition according to the output result.

When the air interface condition is the air interface damage model, the UPF network element can analyze the air interface damage model according to the air interface parameters sent by the base station, and take different actions according to the damage model. For example, when the current air interface damage model is the random packet loss model, the UPF network element Using the network coding method, when the air interface damage model is a continuous packet loss model, the UPF network element adopts an active retransmission mechanism.

S312, the UPF network element processes the downlink data packets.

The UPF network element determines the processing method for the downlink data packet according to the first rule from the SMF network element. The UPF network element sends the processed data packet to the base station, and the base station sends it to the UE.

Optionally, the UPF network element may also determine the processing method of the data packet of the service according to the air interface situation and in combination with the first rule. For the determination process, refer to the foregoing step S203, which will not be repeated here.

Optionally, if the UPF network element adopts the active retransmission mechanism or the network coding method, the UPF network element may carry first indication information in the GTP-U header, and the first indication information is used to indicate that the data packet adopts this processing mode, the first indication information is also used by the base station to determine a first processing mode for the data packet, and the first processing mode includes an acknowledgment retransmission mode or an unacknowledged retransmission mode. For example, when the first indication information indicates that the data packet adopts the active retransmission and/or network coding method, the first processing method may be the unacknowledged retransmission method, or, when the first indication information indicates that the data packet does not adopt the active retransmission method When the retransmission or network coding method is used (or the first indication information is not carried), the first processing method may be an acknowledgment retransmission method. In this way, the base station can determine whether the data packet bypasses the AM mode according to the first indication information. In another implementation manner, the UPF network element may carry second indication information in the GTP-U header, where the second indication information is used to instruct the base station to send the data packet in an unacknowledged retransmission manner.

Optionally, when the UPF network element senses that the base station is congested, the UPF network element can reduce the downlink transmission rate and increase the size of the downlink data buffer. The purpose of reducing the downlink transmission rate is to reduce the data packets sent to the base station to relieve air interface congestion, and to increase the buffer is to reduce the buffer overflow and packet loss on the UPF network element due to the slowdown.

S313, the UE receives the downlink data packet.

If the UPF network element adopts an active retransmission mechanism, the UE needs to check whether the received data packets are repeated, and if so, discard the repeated data packets. The UE may perform data packet repetition detection according to the information of the application layer. For example, if the application layer information of the data packet includes the sequence number of the data packet, the UE may determine whether the data packet is repeated according to the sequence number. The UE can also determine whether the data packets are repeated through the number of the PDCP layer, for example, the base station uses the same PDCP number when sending the repeated data packets.

If the UPF network element adopts the network coding mode, the UE decodes the data packet according to the received network coding algorithm information, so as to obtain the original data packet.

In the technical solution of the above embodiment, the UPF network element receives the first rule from the SMF network element, determines the processing method based on the first rule, and processes the data packets of the service according to the processing method, and the base station can The indication information of the SMF or UPF determines to use the unacknowledged retransmission method to process the data packets of the service, so as to avoid the existing acknowledgment retransmission mechanism due to the inability to receive the acknowledgment feedback from the terminal in time when the air interface situation deteriorates. The transmission of subsequent data packets is blocked, thereby reducing the data transmission delay.

FIG. 4 is a schematic flowchart of a communication method according to still another embodiment of the present application. It should be understood that FIG. 4 shows steps or operations of the communication method, but these steps or operations are only examples, and the embodiments of the present application may also perform other operations or variations of the respective operations in FIG. 4 .

S401, the PCF network element receives service information sent by the AF network element, where the service information is used to indicate service requirement information.

Optionally, the AF network element further sends fifth information, where the fifth information is used to instruct the AF network element to subscribe the air interface situation to the core network. Optionally, the AF network element can set the conditions for sending the report, for example, when the packet loss rate caused by non-congestion is greater than a certain threshold, report the second air interface parameter report to the AF network element; or when the air interface enters the interference period , the air interface parameter report is reported to the AF.

Optionally, the fifth information is further used to indicate that the core network needs to report the air interface information to the AF network element in a low-latency manner, that is, the air interface information needs to be reported to the AF network element in a real-time manner.

Optionally, the AF network element further indicates that the service is a low-latency service. Optionally, the service can be indicated by service information as a low-latency service. For example, the service information includes a latency requirement of the service, and the service can be determined as a low-latency service according to the latency requirement. Or, optionally, the AF network element may also send fifth indication information, where the fifth indication information is used to indicate that the service is a low-latency and high-latency service.

S402, the PCF network element determines a PCC rule based on the service information, and sends the PCC rule to the SMF network element.

The PCC rule may include subscribing the air interface to the core network for the AF network element.

Optionally, if the AF network element sends the indication that the service requires low latency, the PCC rule may also carry the indication that the service requires low latency. The low-latency indication may be a dedicated indication, or it may be indicated by the delay requirement value and/or 5QI.

S403, the SMF network element receives the PCC rule sent by the PCF network element.

If the AF network element subscribes the air interface information report to the PCF and the low-latency report is required, the SMF network element notifies the UPF network element to send the air interface information report directly to the AF network element. The SMF network element can send the notification address of the AF network element to the UPF network element, and the UPF network element uses the notification address to send the air interface information report to the AF network element.

S404, for this step, reference may be made to the aforementioned step S305, which will not be repeated here.

S405, this step is similar to the aforementioned step S306. However, the difference between the two is that in this step S405, the AF network element can directly notify the UE of the network coding algorithm. When the SMF network element informs the UE of the network coding through the NAS information, in the aforementioned steps S401, S402 and S403, the AF network element sends the network coding parameters to the PCF network element, and further sends the PCF network element to the SMF network element.

S406-S408 are the same as the aforementioned steps S205-S207, and are not repeated here.

S409 is similar to the aforementioned step S310, and is not repeated here.

S410, the UPF network element or the SMF network element sends a second air interface parameter report to the AF network element, where the second air interface parameter report is used to describe the air interface situation.

The UPF network element or the SMF network element can directly send the air interface information received from the base station to the AF network element, or the UPF network element or the SMF network element first processes the received information, and then sends the processing result to the AF network element .

For the processing of the air interface parameters by the UPF network element or the SMF network element, reference may be made to the foregoing step S311, which will not be repeated here.

S411, the AF network element processes the downlink data packet according to the processing method.

The AF network element determines the processing method of the data packet of the service according to the air interface situation. For the processing method, reference may be made to the foregoing step S203, which will not be repeated here.

When the AF network element determines that the data packet of the service adopts active retransmission and/or network coding, the AF network element may carry sixth indication information in the header of the data packet, which is used to indicate that the data packet of the service adopts active retransmission. transmission mechanism and/or network coding method (for example, carrying indication information in an IP header, or carrying indication information in a real-time transport protocol (RTP) header, or carrying indication information in a custom field, The specific implementation of this embodiment is not limited). When the UPF network element receives the data packet, it can determine whether the AF network element adopts the active retransmission mechanism and/or network coding method for the data packet according to the sixth indication information carried in the data packet. Further, the UPF network element The third or fourth indication information may be carried in the GTP-U packet header, so that the base station can determine, according to the indication information, to send the data packet of the service in an unacknowledged retransmission manner.

S412, the UE receives the downlink data packet.

If the AF network element adopts the active retransmission mechanism, the UE needs to check whether the received data packets are repeated, and if so, discard the repeated data packets. The UE may perform data packet repetition detection according to the information of the application layer. For example, if the application layer information of the data packet includes the sequence number of the data packet, the UE may determine whether the data packet is repeated according to the sequence number. The UE can also determine whether the data packets are repeated through the number of the PDCP layer, for example, the base station uses the same PDCP number when sending the repeated data packets.

If the AF network element adopts the network coding mode, the UE decodes the data packet according to the received network coding algorithm information, so as to obtain the original data packet.

In the technical solution of the above embodiment, the AF network element determines the air interface condition by acquiring the second air interface parameter report, and determines the processing method of the data packet of the service according to the air interface condition, and then according to the processing method, the data of the service is processed. The existing acknowledgment retransmission mechanism can avoid the phenomenon that the transmission of subsequent data packets is blocked due to the inability to receive the acknowledgment feedback from the terminal in time when the air interface conditions deteriorate, and reduce the delay of data transmission.

FIG. 5 shows a schematic block diagram of a communication apparatus 500 to which an embodiment of the present application is applied. Any network element involved in any of the foregoing methods 200 to 400, such as a mobility management network element, a policy control network element, etc., may be implemented by the communication device shown in FIG. 5 .

It should be understood that the communication apparatus 500 may be a physical device, may also be a component of the physical device (eg, an integrated circuit, a chip, etc.), or may be a functional module in the physical device.

As shown in FIG. 5 , the communication apparatus 500 includes: one or more processors 501 . The processor 501 may store execution instructions for executing the methods of the embodiments of the present application. Optionally, the processor 501 may call an interface to implement the receiving and sending functions. The interface may be a logical interface or a physical interface, which is not limited. For example, the interface may be a transceiver circuit, or an interface circuit. Transceiver circuits or interface circuits for realizing receiving and transmitting functions may be separate or integrated. The above-mentioned transceiver circuit or interface circuit can be used for code/data reading and writing, or the above-mentioned transceiver circuit or interface circuit can be used for signal transmission or transmission.

Alternatively, the interface can be implemented by a transceiver. Optionally, the communication device 500 may further include a transceiver 503 . The transceiver 503 may be referred to as a transceiver unit, a transceiver, a transceiver circuit or a transceiver, etc., for implementing a transceiver function.

Optionally, the communication device 500 may further include a memory 502 . The embodiment of the present application does not specifically limit the specific deployment location of the memory 502, and the memory may be integrated in the processor, or may be independent of the processor. In the case where the communication device 500 does not include a memory, the communication device 500 only needs to have a processing function, and the memory can be deployed in other locations (eg, a cloud system).

The processor 501, the memory 502 and the transceiver 503 communicate with each other through an internal connection path to transmit control and/or data signals.

It will be appreciated that, although not shown, the communication device 500 may also include other devices, such as input devices, output devices, batteries, and the like.

Optionally, in some embodiments, the memory 502 may store execution instructions for executing the methods of the embodiments of the present application. The processor 501 can execute the instructions stored in the memory 502 in combination with other hardware (such as the transceiver 503) to complete the steps of the method shown below. For the specific working process and beneficial effects, refer to the descriptions in the method embodiments below.

The methods disclosed in the embodiments of the present application may be applied to the processor 503 or implemented by the processor 503 . The processor 503 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the method can be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA), or other possible solutions. Programming logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. Software modules can be located in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory or electrically erasable programmable memory, registers, etc. in the storage medium. The storage medium is located in the memory, and the processor reads the instructions in the memory, and completes the steps of the above method in combination with its hardware.

It will be appreciated that memory 502 may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Wherein, the non-volatile memory can be a read-only memory ROM, a programmable read-only memory (programmable ROM, PROM), an erasable programmable read-only memory (erasable PROM, EPROM), an electrically erasable programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory RAM, which acts as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (direct rambus RAM, DR RAM).

It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

FIG. 6 shows a schematic block diagram of a communication apparatus 600 according to an embodiment of the present application. Optionally, the specific form of the communication apparatus 600 may be a general-purpose computer device or a chip in a general-purpose computer device, which is not limited in this embodiment of the present application. As shown in FIG. 6 , the communication device 600 includes a transceiver unit 610 and a processing unit 620 .

Specifically, the communication apparatus 600 may be any network element involved in this application, and may implement the functions that the network element can implement. It should be understood that the communication apparatus 600 may be a physical device, or a component (eg, an integrated circuit, a chip, etc.) of a physical device, or a functional module in the physical device.

Exemplarily, the communication apparatus 600 may be used to implement the functions of the base station in this application. The communication device includes: a transceiver unit 610 for receiving the N2 message from the SMF network element, please refer to the detailed introduction of the content of the N2 message in the foregoing step S203 and the foregoing step S305, which will not be repeated here; The air interface parameter measurement report sent by the UE, the air interface parameter measurement report is used to describe the air interface situation; it is used to receive downlink data packets; and it is used to send a response message to the SMF network element.

It should be understood that the above content is only an exemplary description, the transceiver unit 610 will also be used to perform all transceiver operations related to the base station in the aforementioned methods 200 to 400, and can achieve the beneficial effects corresponding to the method side, for the convenience of concise description , and will not be repeated here.

The processing unit 620 is configured to determine the processing mode of the data packet of the service according to the first demand message, and process the data packet of the service according to the processing mode; for determining the air interface situation according to the air interface parameter measurement report sent by the UE, And determine the processing method of the data packet of the service according to the air interface; configure a specific bearer mode for the service flow of the service; and decide to reduce the downlink data transmission rate and increase the data buffer value according to the congestion situation.

It should be understood that the above content is only an exemplary description, and the processing unit 620 will also be used to perform all the processing operations related to the base station in the foregoing methods 200 to 400, and can achieve the beneficial effects corresponding to the method side, for the convenience of concise description , and will not be repeated here.

It should be understood that, in this implementation manner, the communication apparatus 600 may correspond to the base station in the foregoing method embodiments, and the above-mentioned and other management operations and/or functions of each module in the communication apparatus 600 are for the base station in the foregoing methods 200 to 400, respectively. Therefore, the beneficial effects in the foregoing method embodiments can also be achieved, which are not repeated here for brevity.

Exemplarily, the communication apparatus 600 may be used to implement the function of the user plane function network element in this application. The communication device includes: a transceiver unit 610, configured to receive a first rule from an SMF network element, where the first rule is used to indicate a processing method for a data packet of a service; and a first air interface parameter report from a base station, the The first air interface parameter report is used to describe air interface conditions; it is used to receive downlink data packets.

It should be understood that the above content is only an exemplary description, and the processing unit 620 will also be used to perform all the transceiving operations related to the user plane functional network elements in the foregoing methods 200 to 400, and can achieve the beneficial effects corresponding to the method side, For the convenience of concise description, details are not repeated here.

The processing unit 620 is configured to determine the processing mode of the data packet of the service according to the first rule; be used to determine the processing mode of the data packet of the service according to the obtained air interface condition; be used to process the data packet of the service ; Used to reduce the downlink transmission rate and increase the data buffer value when the base station is perceived to be congested.

It should be understood that the above content is only an exemplary description, and the processing unit 620 is also used to perform all processing operations related to the user plane functional network elements in the foregoing methods 200 to 400, and can achieve the beneficial effects corresponding to the method side, For the convenience of concise description, details are not repeated here.

It should be understood that, in this implementation manner, the communication device 600 may correspond to the user plane function network element in the foregoing method embodiments, and the above-mentioned and other management operations and/or functions of each module in the communication device 600 are for the foregoing method 200 respectively. The corresponding steps of the user plane function network element in step 400 can also achieve the beneficial effects in the foregoing method embodiments, which are not repeated here for the sake of brevity.

Exemplarily, the communication apparatus 600 may be used to implement the function of the application function network element in this application. The communication device includes: a processing unit 610, configured to send a second demand message of the service to the PCF network element, where the second demand information is used to indicate the low-latency and high-reliability requirements of the service; used to receive a request from the PCF network element The response message is used to receive the second air interface parameter report from the UPF network element, where the second air interface parameter report is used to describe the air interface situation.

It should be understood that the above content is only an exemplary description, the processing unit 620 will also be used to perform all the transceiving operations related to the application function network element in the foregoing methods 200 to 400, and can achieve the beneficial effects corresponding to the method side, as For convenience of description, details are not repeated here.

The processing unit 620 is configured to determine the processing mode of the data packet of the service according to the acquired air interface condition; and to process the data packet of the service according to the determined processing mode.

It should be understood that the above content is only an exemplary description, the processing unit 620 will also be used to perform all processing operations related to the application function network element in the foregoing methods 200 to 400, and can achieve the beneficial effects corresponding to the method side, as For convenience of description, details are not repeated here.

It should be understood that, in this implementation manner, the communication device 600 may correspond to the application function network element in the foregoing method embodiments, and the above-mentioned and other management operations and/or functions of each module in the communication device 600 are for the foregoing methods 200 to 200, respectively. The corresponding steps of applying the functional network element in 400 can also achieve the beneficial effects in the foregoing method embodiments, which are not repeated here for the sake of brevity.

Exemplarily, the communication apparatus 600 may be used to implement the function of the session management function network element in this application. The communication device includes: a processing unit 610, configured to receive second demand information for services from an application function network element or a request for subscribing to air interface parameters of the application function network element, where the second demand information is used to indicate that the service requirements are low Delay and high reliability; used to receive response messages from PCF network elements.

It should be understood that the above content is only an exemplary description, and the processing unit 620 will also be used to perform all the transceiving operations related to the session management function network element in the foregoing methods 200 to 400, and can achieve the beneficial effects corresponding to the method side, For the convenience of concise description, details are not repeated here.

The processing unit 620 is configured to send first information to the access network device according to the second requirement information or the request to subscribe to the air interface parameter, where the first information is used to instruct the access network device to send the user plane function network element or session management The functional network element reports air interface parameters, and the air interface parameters are used to describe the air interface conditions, and the air interface conditions are used to determine the processing mode of the service data packets.

It should be understood that the above content is only an exemplary description, the processing unit 620 will also be used to perform all processing operations related to the session management function network element in the foregoing methods 200 to 400, and can achieve the beneficial effects corresponding to the method side, For the convenience of concise description, details are not repeated here.

It should be understood that, in this implementation manner, the communication apparatus 600 may correspond to the session management function network element in the foregoing method embodiments, and the above-mentioned and other management operations and/or functions of each module in the communication apparatus 600 are for the foregoing method 200 respectively. To the corresponding steps of the session management function network element in 400, the beneficial effects in the foregoing method embodiments can also be achieved, which are not repeated here for brevity.

It should also be understood that the apparatus 600 may also be used to implement the functions of the PCF network elements in the above method embodiments, wherein the transceiver unit 610 may be used to implement operations related to reception and transmission, and the processing unit 620 may be used to implement operations other than reception and transmission. For other operations, refer to the descriptions in the foregoing method embodiments for details, and will not be listed one by one here.

In addition, in this application, the communication apparatus 600 is presented in the form of functional modules. A "module" herein may refer to an application-specific integrated circuit ASIC, a circuit, a processor and memory executing one or more software or firmware programs, an integrated logic circuit, and/or other devices that may provide the above-described functions. In a simple embodiment, those skilled in the art can contemplate that the apparatus 600 may take the form shown in FIG. 5 . The processing unit 620 may be implemented by the processor 501 shown in FIG. 5 . Alternatively, if the computer device shown in FIG. 5 includes the memory 502 , the processing unit 620 may be implemented by the processing 501 and the memory 502 . The transceiver unit 610 may be implemented by the transceiver 503 shown in FIG. 5 . The transceiver 503 includes a receive function and a transmit function. Specifically, the processor is implemented by executing the computer program stored in the memory. Optionally, when the apparatus 500 is a chip, the function and/or implementation process of the transceiver unit 610 may also be implemented by pins or circuits. Optionally, the memory may be a storage unit in the chip, such as a register, a cache, etc., and the storage unit may also be a storage unit located outside the chip in the computer device, as shown in FIG. 5 . The memory 502, or, may also be a storage unit deployed in other systems or devices, not in the computer device. Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Various aspects or features of the present application may be implemented as methods, apparatus, or articles of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used in this application encompasses a computer program accessible from any computer readable device, carrier or medium. For example, computer readable media may include, but are not limited to: magnetic storage devices (eg, hard disks, floppy disks, or magnetic tapes, etc.), optical disks (eg, compact discs (CDs), digital versatile discs (DVDs) etc.), smart cards and flash memory devices (eg, erasable programmable read-only memory (EPROM), card, stick or key drives, etc.). Additionally, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.

The present application also provides a computer-readable medium on which a computer program is stored, and when the computer program is executed by a computer, implements the functions of any of the foregoing method embodiments.

The present application also provides a computer program product, which implements the functions of any of the above method embodiments when the computer program product is executed by a computer. In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes an integration of one or more available media. The available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, high-density digital video discs (DVDs)), or semiconductor media (eg, solid state disks, SSD)) etc.

It is to be understood that reference throughout the specification to an "embodiment" means that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Thus, various embodiments throughout this specification are not necessarily necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.

It should also be understood that in this application, "when", "if" and "if" all mean that the UE or the base station will make corresponding processing under certain objective circumstances, not a limited time, and does not require the UE Or the base station must have a judgment action when it is implemented, and it does not mean that there are other limitations.

Additionally, the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases.

The terms "at least one of" or "at least one of" herein mean all or any combination of the listed items, eg, "at least one of A, B, and C", It can be expressed that there are six cases of A alone, B alone, C alone, A and B at the same time, B and C at the same time, and A, B and C at the same time.

In this application, unless otherwise specified, "at least one" refers to one or more, and "a plurality" refers to two or more.

It should be understood that, in various embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean that B is only determined according to A, and B may also be determined according to A and/or other information.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, 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 embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) 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: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk and other mediums that can store program codes.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A communication method, comprising:

The access network device receives the first demand information of the service from the session management function network element;

The access network device determines, according to the first requirement information, a processing method for the data packet of the service, and the processing method includes: an active retransmission mechanism and/or a network coding method;

The access network device processes the data packet of the service according to the processing method.
The method of claim 1, wherein:

The first demand information is used to indicate that the demand of the service is high reliability and low latency.
The method according to claim 1 or 2, characterized in that,

When the processing mode is an active retransmission mechanism, the access network device processes the data packets of the service according to the processing mode, including: the access network device processes the data packets of the service according to the active retransmission mechanism and the active retransmission mechanism. The number of retransmissions to process the data packets of the service; or,

When the processing mode is the network coding mode, the access network device processes the data packets of the service according to the processing mode, including: the access network device processing the service data packets according to the network coding mode and the network coding mode. The algorithm information processes the data packets of the service.
The method of any one of claims 1 to 3, further comprising:

The access network device obtains the air interface situation;

Wherein, the access network device determines, according to the first demand information, a processing method for the data packet of the service, including:

The access network device determines the processing mode according to the first requirement information and the air interface condition.
The method of claim 4, wherein:

The air interface condition includes at least one of the following: a bit error rate, a packet loss rate, an interference period, and a congestion condition of the access network device.
The method according to claim 5, wherein the access network device determines the processing method according to the first demand information and the air interface condition, comprising:

When the bit error rate is greater than the first threshold, the access network device determines to use the processing method for the data packet of the service; or,

When the packet loss rate is greater than the second threshold, the access network device determines to use the processing method for the data packets of the service; or,

When the air interface is in the interference period, the access network device determines to use the processing method for the data packet of the service; or,

When the access network device is in congestion, the access network device determines to use the processing method for the data packet of the service.
The method according to claim 6, wherein the determining the processing mode of the data packet of the service comprises:

When the air interface condition conforms to the random packet loss model, the access network device determines to use the network coding method for the data packet of the service; or,

When the air interface condition conforms to the continuous packet loss model, the access network device determines to use the active retransmission mechanism for the data packet of the service.
The method according to any one of claims 1 to 7, wherein when the processing method is a network coding method, the method further comprises:

obtaining, by the access network device, the algorithm information of the network coding;

The access network device sends the network-coded algorithm information to the terminal device.
The method according to any one of claims 1 to 8, wherein the method further comprises:

When the access network device is in congestion, the access network device reduces the downlink transmission rate and increases the downlink data buffer value.
A communication method, comprising:

The user plane function network element receives a first rule from the session management function network element, where the first rule indicates a processing method for service data packets, and the processing method includes: an active retransmission mechanism and/or a network coding method;

The user plane function network element receives the data packet of the service;

The user plane function network element determines the processing mode according to the first rule;

The user plane function network element processes the data packet of the service according to the processing method.
The method of claim 10, wherein:

When the processing mode is an active retransmission mechanism, the user plane functional network element processes the data packets of the service according to the processing mode, including: the user plane functional network element according to the active retransmission mechanism and the number of active retransmissions to process the data packets of the service; or,

When the processing mode is the network coding mode, the user plane functional network element processes the data packets of the service according to the processing mode, including: the user plane functional network element according to the network coding mode and the network The encoded algorithm information processes the data packets of the service.
The method of claim 10 or 11, further comprising:

The user plane function network element receives a first air interface parameter report from an access network device, where the first air interface parameter report is used to describe an air interface situation;

The user plane function network element determines the processing mode of the data packet of the service according to the air interface situation.
The method of claim 12, wherein

The air interface conditions include at least one of the following: bit error rate, packet loss rate, interference period, and congestion of access network equipment.
The method of claim 13, wherein:

The first rule includes the correspondence between the air interface condition and the processing mode.
The method of claim 14, wherein the correspondence between the air interface condition and the processing mode includes:

When the bit error rate is greater than the third threshold, the processing method is adopted for the data packet of the service; or,

When the packet loss rate is greater than the fourth threshold, the processing method is adopted for the data packets of the service; or,

When the air interface is in the interference period, the processing method is adopted for the data packet of the service; or,

When the access network device is in congestion, the processing method is adopted for the data packet of the service.
The method of claim 15, wherein the correspondence between the air interface condition and the processing mode includes:

When the air interface condition conforms to the random packet loss model, the network coding method is used for the data packets of the service; or,

When the condition of the air interface conforms to the continuous packet loss model, the active retransmission mechanism is adopted for the data packets of the service.
The method of any one of claims 10 to 16, wherein,

The header of the data packet of the service includes first indication information, the first indication information indicates whether the data packet of the service adopts the processing method, and the first indication information is used by the access network device to determine whether the The first processing mode of the data packet, the first processing mode includes: an acknowledgment retransmission mode or an unacknowledged retransmission mode.
The method of claim 17, wherein:

The header of the data packet of the service further includes second indication information, where the second indication information instructs the access network device to send the data packet in an unacknowledged retransmission manner, or the second indication information indicates that the The access network device sends the data packet in an acknowledgment retransmission manner.
The method of any one of claims 10 to 18, further comprising:

When the access network equipment is congested, the user plane function network element reduces the downlink transmission rate and increases the downlink data buffer value.
A communication method, comprising:

The application function network element receives the second air interface parameter report, where the second air interface parameter report is used to describe the air interface situation;

The application function network element determines a processing method for the service data packet according to the air interface situation, and the processing method includes: an active retransmission mechanism and/or a network coding method;

The application function network element processes the data packet of the service according to the processing method.
The method of claim 20, wherein:

The air interface conditions include at least one of the following: bit error rate, packet loss rate, interference period, and congestion of access network equipment.
The method of claim 21, further comprising:

The application function network element subscribes to the air interface situation.
The method according to claim 21 or 22, wherein the application function network element determines, according to the air interface situation, a processing method for the data packet of the service, comprising:

When the bit error rate is greater than the fifth threshold, the application function network element determines to use the processing method for the data packet of the service; or,

When the packet loss rate is greater than the sixth threshold, the application function network element determines to use the processing method for the data packet of the service; or,

When the air interface is in the interference period, the application function network element determines to use the processing method for the data packet of the service; or,

When the access network device is in congestion, the application function network element determines to use the processing method for the data packet of the service.
The method according to claim 23, wherein the application function network element determines a processing method for the data packet of the service according to the air interface situation, comprising:

When the air interface condition conforms to the random packet loss model, the application function network element determines to use the network coding method for the data packet of the service; or,

When the air interface condition conforms to the continuous packet loss model, the application function network element determines to use the active retransmission mechanism for the data packet of the service.
The method of any one of claims 20 to 24, wherein,

The header of the data packet of the service includes third indication information, the third indication information indicates whether the data packet of the service adopts the processing method, and the third indication information is used by the access network device to determine whether the data The second processing mode of the packet, the second processing mode includes: an acknowledgment retransmission mode or an unacknowledged retransmission mode.
The method of claim 25, wherein:

The header of the data packet of the service further includes fourth indication information, where the fourth indication information instructs the access network device to send the data packet in an unacknowledged retransmission manner, or the fourth indication information indicates that the The access network device sends the data packet in an acknowledgment retransmission manner.
A communication method, comprising:

The session management function network element receives second demand information of the service from the application function network element or a request for subscribing to air interface parameters of the application function network element, where the second demand information is used to indicate that the service requires high reliability and low latency;

The session management function network element sends first information to the access network device according to the second requirement information or the request to subscribe to the air interface parameter, where the first information is used to instruct the access network device to send the user plane function network element or the session management function network element to report air interface parameters, the air interface parameters are used to describe the air interface situation, and the air interface situation is used to determine the processing method for the data packet of the service, and the processing method includes: active retransmission mechanism and/or network coding.
The method of claim 27, wherein

The air interface condition includes at least one of the following: a bit error rate, a packet loss rate, an interference period, and a congestion condition of the access network device.
The method of claim 28, wherein

The first information is used to instruct the access network device to send a message to the user plane when the bit error rate is greater than or equal to the seventh threshold, or the packet loss rate is greater than or equal to the eighth threshold, or when an interference period is entered. The functional network element or the session management functional network element reports the air interface parameter.
The method of claim 29, further comprising:

The session management function network element sends second information to the access network device, where the second information is used to instruct the access network device to send the data packet of the service in an unacknowledged retransmission manner.
A communication device, characterized in that the device is an access network device, comprising:

a first transceiver unit, configured to receive first demand information of a service from a session management network element;

a first processing unit, configured to determine a processing method for the data packet of the service according to the first requirement information, where the processing method includes: an active retransmission mechanism and/or a network coding method;

The first processing unit is further configured to process the data packets of the service according to the processing mode.
The apparatus of claim 31, wherein

The first demand information is used to indicate that the demand of the service is high reliability and low latency.
The apparatus of claim 31 or 32, wherein:

When the processing mode is an active retransmission mechanism, the first processing unit processes the data packets of the service according to the processing mode, including: the first processing unit according to the active retransmission mechanism and the active retransmission mechanism The number of retransmissions to process the data packets of the service; or,

When the processing mode is the network coding mode, the first processing unit processes the data packets of the service according to the processing mode, including: the first processing unit according to the network coding mode and the network coding mode The algorithm information processes the data packets of the service.
The device of any one of claims 31 to 33, comprising:

The first transceiver unit is used to obtain air interface conditions;

Wherein, the first processing unit determines, according to the first demand information, a processing method for the data packets of the service, including:

The first processing unit is configured to determine the processing mode according to the first demand information and the air interface condition.
The apparatus of claim 34, wherein:

The air interface condition includes at least one of the following: a bit error rate, a packet loss rate, an interference period, and a congestion condition of the access network device.
The apparatus of claim 35, wherein the first unit determines the processing method according to the first demand information and the air interface condition, comprising:

When the bit error rate is greater than the first threshold, the first processing unit is configured to determine to adopt the processing method for the data packet of the service; or,

When the packet loss rate is greater than the second threshold, the first processing unit is configured to determine to use the processing mode for the data packets of the service; or,

When the air interface is in an interference period, the first processing unit is configured to determine to use the processing method for the data packet of the service; or,

When the apparatus is in congestion, the first processing unit is configured to determine to use the processing mode for the data packet of the service.
The apparatus of claim 36, wherein the first unit determines the processing method according to the first demand information and the air interface condition, comprising:

When the air interface condition conforms to the random packet loss model, the first processing unit is configured to determine to use the network coding method for the data packet of the service; or,

When the condition of the air interface conforms to the continuous packet loss model, the first processing unit is configured to determine to use the active retransmission mechanism for the data packet of the service.
The apparatus according to any one of claims 31 to 37, wherein when the processing method is a network coding method, the method further comprises:

the first transceiver unit, configured to obtain the algorithm information of the network coding;

The first transceiver unit is further configured to send the network coding algorithm information to the terminal device.
The apparatus of any one of claims 31 to 38, wherein the method further comprises:

When the device is in congestion, the first processing unit is configured to reduce the downlink transmission rate and increase the downlink data buffer value.
A communication device, characterized in that the device is a user plane functional network element, comprising:

The second transceiver unit is configured to receive the first rule of the session management function network element, where the first rule is used to indicate a processing method for data packets of the service, and the processing method includes: an active retransmission mechanism and/or network coding Way;

the second transceiver unit, configured to receive data packets of the service;

a second processing unit, configured to determine the processing mode according to the first rule;

The second processing unit is further configured to process the data packets of the service according to the processing mode.
The apparatus of claim 40, wherein:

When the processing mode is an active retransmission mechanism, the second processing unit processes the data packets of the service according to the processing mode, including: the second processing unit according to the active retransmission mechanism and the active retransmission mechanism The number of retransmissions to process the data packets of the service; or,

When the processing mode is the network coding mode, the second processing unit processes the data packets of the service according to the processing mode, including: the second processing unit processes the data packets of the service according to the network coding mode and the network coding mode. The algorithm information processes the data packets of the service.
The apparatus of claim 40 or 41, further comprising:

the second transceiver unit, configured to receive a first air interface parameter report from an access network device, where the first air interface parameter report is used to describe air interface conditions;

The second processing unit is configured to determine the processing mode of the data packet of the service according to the air interface condition.
The apparatus of claim 42, wherein

The air interface conditions include at least one of the following: bit error rate, packet loss rate, interference period, and congestion of access network equipment.
The apparatus of claim 43, wherein

The first rule includes the correspondence between the air interface condition and the processing mode.
The apparatus of claim 44, wherein the correspondence between the air interface condition and the processing mode includes:

When the bit error rate is greater than the third threshold, the processing method is adopted for the data packet of the service; or,

When the packet loss rate is greater than the fourth threshold, the processing method is adopted for the data packets of the service; or,

When the air interface is in the interference period, the processing method is adopted for the data packet of the service; or,

When the access network device is in congestion, the processing method is adopted for the data packet of the service.
The apparatus according to claim 45, wherein the correspondence between the air interface condition and the processing mode includes:

When the air interface condition conforms to the random packet loss model, the network coding method is used for the data packets of the service; or,

When the condition of the air interface conforms to the continuous packet loss model, the active retransmission mechanism is adopted for the data packets of the service.
An apparatus as claimed in any one of claims 40 to 46, characterized in that,

The header of the data packet of the service includes first indication information, the first indication information indicates whether the data packet of the service adopts the processing method, and the first indication information is used by the access network device to determine whether the The first processing mode of the data packet, the first processing mode includes: an acknowledgment retransmission mode or an unacknowledged retransmission mode.
The apparatus of claim 47, wherein:

The header of the data packet of the service further includes second indication information, where the second indication information instructs the access network device to send the data packet in an unacknowledged retransmission manner, or the second indication information indicates that the The access network device sends the data packet in an acknowledgment retransmission manner.
The device of any one of claims 40 to 48, further comprising:

When the access network device is in congestion, the second processing unit is configured to reduce the downlink transmission rate and increase the downlink data buffer value.
A communication device, characterized in that the device is an application function network element, comprising:

a third transceiver unit, configured to receive a second air interface parameter report, where the second air interface parameter report is used to describe the air interface situation;

a third processing unit, configured to determine a processing method for the data packets of the service according to the air interface situation, where the processing method includes: an active retransmission mechanism and/or a network coding method;

The third processing unit is further configured to process the data packets of the service according to the processing mode.
The apparatus of claim 50, wherein:

The air interface conditions include at least one of the following: bit error rate, packet loss rate, interference period, and congestion of access network equipment.
The apparatus of claim 51, further comprising:

The third processing unit is configured to subscribe to the air interface situation.
The apparatus according to claim 51 or 52, wherein the third unit determines, according to the air interface condition, a processing method for the data packet of the service, comprising:

When the bit error rate is greater than the fifth threshold, the third processing unit is configured to determine to adopt the processing method for the data packet of the service; or,

When the packet loss rate is greater than the sixth threshold, the third processing unit is configured to adopt the processing method for the data packets of the service; or,

When the air interface is in an interference period, the third processing unit is configured to adopt the processing method for the data packet of the service; or,

When the access network device is in congestion, the third processing unit is configured to use the processing method for the data packet of the service.
The apparatus according to claim 53, wherein the third unit determines a processing method for the data packet of the service according to the air interface condition, comprising:

When the condition of the air interface conforms to the random packet loss model, the third unit is configured to determine to use the network coding method for the data packet of the service; or,

When the condition of the air interface conforms to the continuous packet loss model, the third unit is configured to determine that the active retransmission mechanism is adopted for the data packet of the service.
An apparatus as claimed in any one of claims 50 to 54, characterized in that,

The header of the data packet of the service includes third indication information, the third indication information indicates whether the data packet of the service adopts the processing method, and the third indication information is used by the access network device to determine whether the data The second processing mode of the packet, the second processing mode includes: an acknowledgment retransmission mode or an unacknowledged retransmission mode.
The apparatus of claim 55, wherein

The header of the data packet of the service further includes fourth indication information, where the fourth indication information instructs the access network device to send the data packet in an unacknowledged retransmission manner, or the fourth indication information indicates that the The access network device sends the data packet in an acknowledgment retransmission manner.
A communication device, characterized in that the device is a session management function network element, comprising:

a fourth transceiver unit, configured to receive second demand information of the service from the application function network element or a request for subscribing to air interface parameters of the application function network element, where the second demand information is used to indicate that the service requires high reliability and low latency ;

a fourth processing unit, configured to send first information to the access network device according to the second requirement information or the request to subscribe to the air interface parameter, where the first information is used to instruct the access network device to send the user plane function network element or the session management function network element to report air interface parameters, the air interface parameters are used to describe the air interface situation, and the air interface situation is used to determine the processing method for the data packet of the service, and the processing method includes: active retransmission mechanism and/or network coding.
The apparatus of claim 57, wherein:

The air interface condition includes at least one of the following: a bit error rate, a packet loss rate, an interference period, and a congestion condition of the access network device.
The apparatus of claim 58, wherein

The first information is used to instruct the access network device to send a message to the user plane when the bit error rate is greater than or equal to the seventh threshold, or the packet loss rate is greater than or equal to the eighth threshold, or when an interference period is entered. The functional network element or the session management functional network element reports the air interface parameter.
The apparatus of claim 59, further comprising:

The fourth transceiver unit is further configured to send second information to the access network device, where the second information is used to instruct the access network device to send the data packet of the service in an unacknowledged retransmission manner.
A communication system, comprising:

User plane functional network elements and session management functional network elements;

The session management function network element is configured to send a first rule to the user plane function network element, where the first rule indicates a processing method for service data packets, and the processing method includes: an active retransmission mechanism and/or network coding method;

The user plane function network element is configured to receive the data packet of the service; determine the processing mode according to the first rule; process the data packet of the service according to the processing mode.
The system of claim 61, wherein:

When the processing mode is an active retransmission mechanism, the user plane functional network element is configured to process the data packets of the service according to the active retransmission mechanism and the number of active retransmissions; or,

When the processing mode is the network coding mode, the user plane function network element is configured to process the data packets of the service according to the network coding mode and the algorithm information of the network coding.
The system of claim 61 or 62, wherein:

The user plane function network element is further configured to receive a first air interface parameter report from the access network device, where the first air interface parameter report is used to describe the air interface condition; and the processing of the data packet of the service is determined according to the air interface condition Way.
The system of claim 63, wherein:

The air interface conditions include at least one of the following: bit error rate, packet loss rate, interference period, and congestion of access network equipment.
The system of claim 64, wherein:

The first rule includes the correspondence between the air interface condition and the processing mode.
The system according to claim 64, wherein the correspondence between the air interface condition and the processing mode includes:

When the bit error rate is greater than the third threshold, the processing method is adopted for the data packet of the service; or,

When the packet loss rate is greater than the fourth threshold, the processing method is adopted for the data packets of the service; or,

When the air interface is in the interference period, the processing method is adopted for the data packet of the service; or,

When the access network device is in congestion, the processing method is adopted for the data packet of the service.
The system according to claim 66, wherein the correspondence between the air interface condition and the processing mode includes:

When the air interface condition conforms to the random packet loss model, the network coding method is used for the data packets of the service; or,

When the condition of the air interface conforms to the continuous packet loss model, the active retransmission mechanism is adopted for the data packets of the service.
The system of any one of claims 61 to 67, wherein,

The header of the data packet of the service includes first indication information, the first indication information indicates whether the data packet of the service adopts the processing method, and the first indication information is used by the access network device to determine whether the The first processing mode of the data packet, the first processing mode includes: an acknowledgment retransmission mode or an unacknowledged retransmission mode.
The system of claim 68, wherein:

The header of the data packet of the service further includes second indication information, where the second indication information instructs the access network device to send the data packet in an unacknowledged retransmission manner, or the second indication information indicates that the The access network device sends the data packet in an acknowledgment retransmission manner.
The system of any one of claims 61 to 69, wherein,

When the access network equipment is in congestion, the user plane function network element is further used to reduce the downlink transmission rate and increase the downlink data buffer value.
A communication system, comprising:

Application function network element and session management function network element;

The application function network element is configured to send second demand information of the service or a request for subscribing air interface parameters to the session management function network element, where the second demand information is used to indicate that the service requires high reliability and low latency;

The session management function network element is configured to send first information to the access network device according to the second requirement information or the request to subscribe to the air interface parameter, where the first information is used to instruct the access network device to send the user plane The functional network element or the session management function network element reports air interface parameters, where the air interface parameters are used to describe air interface conditions, and the air interface conditions are used to determine a processing method for the data packets of the service, and the processing methods include: active Retransmission mechanism and/or network coding method;

The application function network element is further configured to receive a second air interface parameter report, where the second air interface parameter report is used to describe the air interface situation; according to the air interface situation, determine a processing method for the data packet of the service, and the processing method includes: Active retransmission mechanism and/or network coding method; process the data packets of the service according to the processing method.
The system of claim 71, wherein:

The air interface conditions include at least one of the following: bit error rate, packet loss rate, interference period, and congestion of access network equipment.
The system of claim 71 or 72, wherein,

When the bit error rate is greater than the fifth threshold, the application function network element is configured to determine to use the processing method for the data packet of the service; or,

When the packet loss rate is greater than the sixth threshold, the application function network element is configured to determine to adopt the processing method for the data packet of the service; or,

When the air interface is in the interference period, the application function network element is used to determine to use the processing method for the data packet of the service; or,

When the access network device is in congestion, the application function network element is configured to determine to use the processing mode for the data packet of the service.
The system of claim 73, wherein:

When the air interface condition conforms to the random packet loss model, the application function network element is used to determine to use the network coding method for the data packet of the service; or,

When the condition of the air interface conforms to the continuous packet loss model, the application function network element is configured to determine to use the active retransmission mechanism for the data packet of the service.
The system of any one of claims 70 to 74, wherein

The header of the data packet of the service includes third indication information, the third indication information indicates whether the data packet of the service adopts the processing method, and the third indication information is used by the access network device to determine whether the data The second processing mode of the packet, the second processing mode includes: an acknowledgment retransmission mode or an unacknowledged retransmission mode.
The system of claim 75, wherein

The header of the data packet of the service further includes fourth indication information, where the fourth indication information instructs the access network device to send the data packet in an unacknowledged retransmission manner, or the fourth indication information indicates that the The access network device sends the data packet in an acknowledgment retransmission manner.
The system of claim 76, wherein:

The first information is used to instruct the access network device to send a message to the user plane when the bit error rate is greater than or equal to the seventh threshold, or the packet loss rate is greater than or equal to the eighth threshold, or when an interference period is entered. The functional network element or the session management functional network element reports the air interface parameter.
A communication device, characterized in that it comprises a processor, the processor is coupled with a memory, the memory is used for storing computer programs or instructions, and the processor is used for executing the computer programs or instructions in the memory, so that

The method of any one of claims 1 to 9 is performed, or

The method of any one of claims 10 to 19 is performed, or

The method of any one of claims 20 to 26 is performed, or

The method of any of claims 27 to 30 is performed.
A computer-readable storage medium, characterized in that a computer program or instruction is stored, and the computer program or instruction is used to realize

The method of any one of claims 1 to 9, or

The method of any one of claims 10 to 19, or

The method of any one of claims 20 to 26, or

The method of any one of claims 27 to 30.