CN116134878A

CN116134878A - Communication method and device

Info

Publication number: CN116134878A
Application number: CN202180045340.4A
Authority: CN
Inventors: 周艳; 叶进洲; 袁立平; 宗在峰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2023-05-16
Also published as: WO2022155977A1

Abstract

The embodiment of the application provides a communication method and device, wherein the method comprises the following steps: the access network equipment receives first requirement information of a service from a session management function network element; the access network equipment determines a processing mode of the data packet of the service according to the first requirement information, wherein the processing mode comprises the following steps: an active retransmission mechanism and/or a network coding mode; and the access network equipment processes the data packet of the service according to the processing mode. The method provided by the application can solve the problem of data transmission blocking caused by incapability of timely transmitting the subsequent data packet when the existing reliability mechanism is poor in the face of empty condition, can reduce the time delay of data transmission, and can meet the service requirement.

Description

Communication method and device

Technical Field

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

Background

The existing reliability mechanism of data transmission is implemented through layering, for example, in wireless communication, when there is packet loss or error code in an air interface, the reliability mechanism can be solved by performing retransmission correction through a physical layer L1/media access control (media access control, MAC) layer L2 between a base station and a terminal, for example, by performing Acknowledgement (AM) mode supported by a radio link control (radio link control, RLC) layer between the base station and the terminal, and the mode supports reliable and sequential transmission of data packets between the terminal and the base station; alternatively, a reliable connection may be established between the terminal and the application server at the transport layer in order to support retransmission mechanisms for data packets, e.g. via the transmission control protocol (transmission control protocol, TCP) and the fast user data protocol internet link (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 and sequential transmission of the data packets, or the retransmission mechanism of the transmission layer between the terminal and the application server can be used to support reliable and sequential transmission of the data packets, however, when the air interface condition is poor, the existing reliability mechanism may cause blocking of subsequent data packets, so that the subsequent data packets cannot be timely sent to the terminal, and the delay of data transmission may be increased.

Disclosure of Invention

The application provides a communication method and device, which can solve the problem of data transmission blocking caused by incapability of timely transmitting subsequent data packets when the existing reliability mechanism is poor in the face of air interface conditions, reduce the time delay of data transmission and meet service requirements.

In a first aspect, a communication method is provided, including: the access network equipment receives first requirement information of a service from a session management function network element; the access network equipment determines a processing mode of the data packet of the service according to the first requirement information, wherein the processing mode comprises the following steps: an active retransmission mechanism and/or a network coding mode; and the access network equipment processes the data packet of the service according to the processing mode.

In the technical scheme, the access network equipment receives the first requirement information of the service from the session management function network element, determines that the processing mode of the data packet of the service is an active retransmission mechanism or a network coding mode, and further processes the data packet of the service according to the processing mode, so that the data transmission mode can be flexibly adjusted, the time delay of the data transmission can be reduced, and the service requirement can be met.

With reference to the first aspect, in certain implementation manners 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 requirement information of the service, the access network equipment can clearly know the requirement of the service, respond to the requirement of the service correspondingly, adjust the transmission mode of the data packet of the service and meet the high-reliability low-delay requirement of the service.

With reference to the first aspect, in some implementation manners of the first aspect, when the processing manner is an active retransmission mechanism, the processing, by the access network device, of the data packet of the service according to the processing manner includes: the access network equipment processes the data packet of the service according to the active retransmission mechanism and the number of active retransmission times; or when the processing mode is a network coding mode, the access network device processes the data packet of the service according to the processing mode, including: and the access network equipment processes the data packet of the service according to the network coding mode and the algorithm information of the network coding.

With reference to the first aspect, in some implementations of the first aspect, the access network device acquires an air interface condition; the access network equipment determines a processing mode of the data packet of the service according to the first demand information, and the processing mode comprises the following steps of; and the access network equipment determines the processing mode according to the first demand information and the air interface condition.

In the technical scheme, the access network equipment can respond to the requirements of high reliability and low time delay of the service by combining different air interface conditions, for example, when the air interface conditions are bad, the access network equipment can adopt an active retransmission mechanism and/or a network coding mode, thereby reducing the time delay of data transmission and meeting the requirements of high reliability and low time delay of the service.

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

With reference to the first aspect, in some implementation manners of the first aspect, the determining a processing manner of a data packet of the service includes: when the error rate is greater than a first threshold value, the access network equipment determines that the processing mode is adopted for the data packet of the service; or when the packet loss rate is greater than a second threshold, the access network equipment determines that the processing mode is adopted for the data packet of the service; or when the air interface is in an interference period, the access network equipment determines that the processing mode is adopted for the data packet of the service; or when the access network equipment is in congestion, the access network equipment determines that the processing mode is adopted for the data packet of the service.

In the technical scheme, the high-reliability low-delay requirement of the service can be preferably met by distinguishing different air interface conditions.

With reference to the first aspect, in some implementation manners of the first aspect, the determining a processing manner of a data packet of the service includes: when the air interface condition accords with a random packet loss model, the access network equipment determines that the network coding mode is adopted for the data packet of the service; or when the air interface condition accords with a continuous packet loss model, the access network equipment determines to adopt the active retransmission mechanism to the data packet of the service.

With reference to the first aspect, in certain implementation manners of the first aspect, when the processing manner is a network coding manner, the method further includes: the access network equipment acquires algorithm information of the network codes; and the access network equipment sends the algorithm information of the network codes to the terminal equipment.

In the technical scheme, when the access network equipment determines that the processing mode of the data packet of the service is a network coding mode, the access network equipment can acquire the algorithm information of the network coding and send the algorithm information to the terminal equipment, so that the time for decoding the data packet by the terminal equipment is saved, and the time delay of data transmission can be reduced.

With reference to the first aspect, in certain implementation manners of the first aspect, when the access network device is in congestion, the access network device decreases a downlink sending rate and increases a downlink data buffer value.

In the technical scheme, the access network equipment dynamically adjusts the downlink sending rate by sensing the congestion condition of the access network equipment, so that the congestion condition of the access network equipment can be relieved, the condition of data transmission is improved, and the time delay of the data transmission can be reduced.

In a second aspect, a communication method is provided, including: the user plane function network element receives a first rule from the session management function network element, wherein the first rule indicates a processing mode of a data packet of a service, and the processing mode comprises the following steps: an active retransmission mechanism and/or a network coding mode; the user plane function network element receives the data packet of the service; the user plane functional network element determines the processing mode according to the first rule; and the user plane functional network element processes the data packet of the service according to the processing mode.

In the technical scheme, the user plane functional network element determines that the processing mode of the data packet of the service is an active retransmission mechanism or a network coding mode by receiving the first rule of the service from the session management functional network element, and then processes the data packet of the service according to the processing mode, so that the data transmission mode is adjusted by the user plane functional network element, the time delay of data transmission can be reduced, and the service requirement is met.

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

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 an access network device, where the first air interface parameter report is used to describe an air interface situation; and the user plane function network element determines the processing mode of the data packet of the service according to the air interface condition.

In the technical scheme, the user plane function network element obtains the air interface condition and determines the processing mode of the data packet of the service according to the air interface condition, so that the transmission mode of the data packet can be dynamically determined according to the quality of the air interface condition, the time delay of data transmission is reduced, and the service requirement is met.

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

With reference to the second aspect, in some implementations 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 correspondence between the air interface condition and the processing manner includes: when the error rate is larger than a third threshold value, adopting the processing mode for the data packet of the service; or when the packet loss rate is greater than a fourth threshold, adopting the processing mode for the data packet of the service; or when the air interface is in an interference period, adopting the processing mode for the data packet of the service; or when the access network equipment is in congestion, adopting the processing mode for the data packet of the service.

With reference to the second aspect, in some implementations of the second aspect, the correspondence between the air interface condition and the processing manner includes: when the air interface condition accords with a random packet loss model, adopting the network coding mode for the data packet of the service; or when the air interface condition accords with a continuous packet loss model, adopting the active retransmission mechanism for the data packet of the service.

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

In the technical scheme, the first indication information is carried in the data packet head of the service, so that whether the data packet adopts the processing mode or not can be indicated conveniently, the access network equipment can recognize and make corresponding operation conveniently, the time delay of data transmission is saved, and the service requirement is met.

With reference to the second aspect, in some implementations of the second aspect, the packet header of the service further includes second indication information, where the second indication information indicates that the access network device sends the packet in a non-acknowledgement retransmission manner, or the second indication information indicates that the access network device sends the packet in an acknowledgement retransmission manner.

In the technical scheme, the second indication information is carried in the data packet head part of the service, so that the access network equipment can be conveniently indicated to identify and make corresponding operation, if the processing mode is not adopted, the access network equipment adopts a confirmation retransmission mode to send the data packet, if the processing mode is adopted, the access network equipment adopts a non-confirmation mode to send the data packet, and the service requirement is met.

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

In the technical scheme, the user plane functional network element dynamically adjusts the downlink sending rate by sensing the congestion condition of the access network equipment, so that the congestion condition of the access network equipment can be relieved, the condition of data transmission is improved, and the time delay of the data transmission can be reduced.

In a third aspect, a communication method is provided, including: the application function network element receives a second air interface parameter report, wherein the second air interface parameter report is used for describing an air interface condition; the application function network element determines a processing mode of a data packet of a service according to the air interface condition, wherein the processing mode comprises the following steps: an active retransmission mechanism and/or a network coding mode; and the application function network element processes the data packet of the service according to the processing mode.

In the technical scheme, the AF network element acquires the air interface condition, determines the processing mode of the data packet to be an active retransmission mechanism or a network coding mode according to the air interface condition, processes the data packet of the service, and realizes that the AF network element determines different processing modes according to different air interface conditions so as to meet the service requirement.

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

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

The AF network element is facilitated to judge by acquiring the air interface condition, so that the service requirement is better met.

With reference to the third aspect, in some implementations of the third aspect, the determining, by the application function network element, a processing manner of a data packet of a service according to the air interface condition includes: when the error rate is greater than a fifth threshold, the application function network element determines that the processing mode is adopted for the data packet of the service; or when the packet loss rate is greater than a sixth threshold, the application function network element determines that the processing mode is adopted for the data packet of the service; or when the air interface is in an interference period, the application function network element determines that the processing mode is adopted for the data packet of the service; or when the access network equipment is in congestion, the application function network element determines that the processing mode is adopted for the data packet of the service.

With reference to the third aspect, in some implementations of the third aspect, the determining, by the application function network element, a processing manner of a data packet of a service according to the air interface condition includes: when the air interface condition accords with a random packet loss model, the application function network element determines that the network coding mode is adopted for the data packet of the service; or when the air interface condition accords with a continuous packet loss model, the application function network element determines to adopt the active retransmission mechanism to the data packet of the service.

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

In the technical scheme, the third indication information is carried in the packet head part of the service, so that whether the data packet adopts the processing mode or not can be indicated conveniently, the access network equipment can recognize and make corresponding operation conveniently, the time delay of data transmission is saved, and the service requirement is met.

With reference to the third aspect, in some implementations of the third aspect, the packet header of the service further includes fourth indication information, where the fourth indication information indicates that the access network device sends the packet in a non-acknowledgement retransmission manner, or the fourth indication information indicates that the access network device sends the packet in an acknowledgement retransmission manner.

In the technical scheme, the fourth indication information is carried in the packet head part of the service, so that the access network equipment can be conveniently indicated to identify and make corresponding operation, if the processing mode is not adopted, the access network equipment adopts a confirmation retransmission mode to send the data packet, if the processing mode is adopted, the access network equipment adopts a non-confirmation mode to send the data packet, and the service requirement is met.

In a fourth aspect, a communication method is provided, including: the session management function network element receives second requirement information of a service from the application function network element or a request of subscribing air interface parameters of the application function network element, wherein the second requirement information is used for indicating that the service requires high reliability and low time delay; the session management function network element sends first information to the access network device according to the second requirement information or the request for subscribing the air interface parameter, the first information is used for indicating the access network device to report the air interface parameter to the user plane function network element or the session management function network element, the air interface parameter is used for describing an air interface condition, the air interface condition is used for determining a processing mode of a data packet of the service, and the processing mode comprises: active retransmission mechanisms and/or network coding schemes.

In the technical scheme, the session management function network element indicates the access network device to report the air interface parameter by receiving the second requirement information of the service from the application function network element or the request of subscribing the air interface parameter of the application function network element, so that the application function network element or the user plane function network element can conveniently acquire the air interface condition and determine the processing mode of the data packet of the service, and the high-reliability low-delay requirement of the service is met.

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

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

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 send a data packet of the service in a non-acknowledgement retransmission manner.

In the technical scheme, the session management function network element sends second indication information to the access network equipment, and the second indication information is used for indicating the access network equipment to send the data packet equal to the service in a non-acknowledgement retransmission mode, so that the high-reliability low-delay requirement of the service is met.

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

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

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 certain implementations of the fifth aspect, the first requirement information further includes at least one of: the time delay requirement, the packet loss rate requirement, the bit error rate requirement and the 5G service quality identifier 5QI of the service.

With reference to the fifth aspect, in some implementations of the fifth aspect, the processing, by the first processing unit, the packet of the service according to the processing manner includes: the first processing unit processes the data packet of the service according to the active retransmission mechanism and the number of active retransmission times; or when the processing mode is a network coding mode, the first processing unit processes the data packet of the service according to the processing mode, including: and the first processing unit processes the data packet of the service according to the network coding mode and the algorithm information of the network coding.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the method further includes: the first receiving and transmitting unit is used for acquiring the air interface condition; the first processing unit determines a processing mode of the data packet of the service according to the first requirement information, and includes: the first processing unit is used for determining the processing mode according to the first demand information and the air interface condition.

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

With reference to the fifth aspect, in some implementations of the fifth aspect, the determining a processing manner of the data packet of the service includes: when the error rate is greater than a first threshold, the first processing unit is configured to determine that the processing mode is adopted for the data packet of the service; or when the packet loss rate is greater than a second threshold, the first processing unit is configured to determine that the processing mode is adopted for the data packet of the service; or when the air interface is in an interference period, the first processing unit is used for determining that the processing mode is adopted for the data packet of the service; or when the device is in congestion, the first processing unit is used for determining that the processing mode is adopted for the data packet of the service.

With reference to the fifth aspect, in some implementations of the fifth aspect, the determining a processing manner of the data packet of the service includes: when the air interface condition accords with a random packet loss model, the first processing unit is used for determining that the network coding mode is adopted for the data packet of the service; or when the air interface condition accords with a continuous packet loss model, the first processing unit is used for determining that the active retransmission mechanism is adopted for the data packet of the service.

With reference to the fifth aspect, in certain implementation manners of the fifth aspect, when the processing manner is a network coding manner, the method further includes: the first transceiver unit is used for acquiring algorithm information of the network codes; the first transceiver unit is further configured to send the network encoded algorithm information to a terminal device.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the apparatus further includes: and when the device is in congestion, the first processing unit is used for reducing the downlink sending rate and increasing the downlink data cache value.

In a sixth aspect, a communications apparatus is provided, the apparatus being a user plane functional network element, comprising: the second transceiver unit is configured to receive a first rule of a session management function network element, where the first rule is used to indicate a processing manner of a data packet of a service, and the processing manner includes: an active retransmission mechanism and/or a network coding mode; the second transceiver unit is used for receiving the data packet of the service; the second processing unit is used for determining the processing mode according to the first rule; the second processing unit is further configured to process the data packet of the service according to the processing manner.

With reference to the sixth aspect, in some implementations of the sixth aspect, the processing, by the second processing unit, the packet of the service includes: the second processing unit processes the data packet of the service according to the active retransmission mechanism and the number of active retransmission times; or when the processing mode is a network coding mode, the second processing unit processes the data packet of the service according to the processing mode, including: and the second processing unit processes the data packet of the service according to the network coding mode and the algorithm information of the network coding.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the method further includes: the second transceiver unit is 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 an air interface situation; and the second processing unit is used for determining the processing mode of the data packet of the service according to the air interface condition.

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

With reference to the sixth aspect, in some implementations 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 correspondence between the air interface situation and the processing manner includes: when the error rate is larger than a third threshold value, adopting the processing mode for the data packet of the service; or when the packet loss rate is greater than a fourth threshold, adopting the processing mode for the data packet of the service; or when the air interface is in an interference period, adopting the processing mode for the data packet of the service; or when the access network equipment is in congestion, adopting the processing mode for the data packet of the service.

With reference to the sixth aspect, in some implementations of the sixth aspect, the correspondence between the air interface situation and the processing manner includes: when the air interface condition accords with a random packet loss model, adopting the network coding mode for the data packet of the service; or when the air interface condition accords with a continuous packet loss model, adopting the active retransmission mechanism for the data packet of the service.

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

With reference to the sixth aspect, in some implementations of the sixth aspect, the packet header of the service further includes second indication information, where the second indication information indicates that the access network device sends the packet in a non-acknowledgement retransmission manner, or the second indication information indicates that the access network device sends the packet in an acknowledgement retransmission manner.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the method further includes: and when the access network equipment is in congestion, the second processing unit is used for reducing the downlink sending rate and increasing the downlink data cache value.

In a seventh aspect, a communications apparatus is provided, the apparatus being an application function network element, comprising: the third transceiver unit is used for receiving a second air interface parameter report, and the second air interface parameter report is used for describing an air interface condition; the third processing unit is configured to determine a processing manner of a data packet of a service according to the air interface condition, where the processing manner includes: an active retransmission mechanism and/or a network coding mode; and the third processing unit is further used for processing the data packet of the service according to the processing mode.

With reference to the seventh aspect, in certain implementations of the seventh aspect, the air interface condition includes at least one of: 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 case.

With reference to the seventh aspect, in some implementation manners of the seventh aspect, the determining, by the third unit, a processing manner of a data packet of a service according to the air interface situation includes: when the error rate is greater than a fifth threshold, the third processing unit is configured to determine that the processing mode is adopted for the data packet of the service; or when the packet loss rate is greater than a sixth threshold, the third processing unit is configured to use the processing manner for the data packet of the service; or when the air interface is in an interference period, the third processing unit is configured to apply the processing mode to the data packet of the service; or when the access network equipment is in congestion, the third processing unit is configured to adopt the processing mode to the data packet of the service.

With reference to the seventh aspect, in some implementation manners of the seventh aspect, the determining, by the third unit, a processing manner of a data packet of a service according to the air interface situation includes: when the air interface condition accords with a random packet loss model, the third unit is used for determining that the network coding mode is adopted for the data packet of the service; or when the air interface condition accords with a continuous packet loss model, the third unit is used for determining that the active retransmission mechanism is adopted for the data packet of the service.

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

With reference to the seventh aspect, in some implementations of the seventh aspect, the packet header of the service includes fourth indication information, where the fourth indication information indicates that the access network device sends the packet in a non-acknowledgement retransmission manner, or the fourth indication information indicates that the access network device sends the packet in an acknowledgement retransmission manner.

An eighth aspect provides a communication apparatus, the apparatus being a session management function network element, comprising: a fourth transceiver unit, configured to receive second requirement information of a service from an application function network element or a request of the application function network element for subscribing to an air interface parameter, where the second requirement information is used to indicate that the service requires low latency and high reliability; a fourth processing unit, configured to send, to an access network device, first information according to the second requirement information or the request for subscribing to an air interface parameter, where the first information is used to instruct the access network device to report the air interface parameter to a user plane function network element or the session management function network element, where the air interface parameter is used to describe an air interface condition, and the air interface condition is used to determine a processing manner of a data packet of the service, where the processing manner includes: active retransmission mechanisms and/or network coding schemes.

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

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

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 instruct the access network device to send a data packet of the service in a non-acknowledgement retransmission manner.

In a ninth aspect, there is provided a communication system 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, where the first rule indicates a processing manner of a data packet of a service, and the processing manner includes: an active retransmission mechanism and/or a network coding mode; the user plane function network element is used for receiving the data packet of the service; determining the processing mode according to the first rule; and processing the data packet of the service according to the processing mode.

With reference to the ninth aspect, in some implementations of the ninth aspect, when the processing manner is an active retransmission mechanism, the user plane function network element is configured to process a data packet of the service by using the active retransmission mechanism and the number of active retransmissions; or when the processing mode is a network coding mode, the user plane function network element is used for processing the data packet of the service according to the network coding mode and the algorithm information of the network coding.

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 an access network device, where the first air interface parameter report is used to describe an air interface situation; and the user plane function network element determines the processing mode of the data packet of the service according to the air interface condition.

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

With reference to the ninth aspect, in some implementations 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 implementation manners of the ninth aspect, a correspondence between the air interface situation and the processing manner includes: when the error rate is larger than a third threshold value, adopting the processing mode for the data packet of the service; or when the packet loss rate is greater than a fourth threshold, adopting the processing mode for the data packet of the service; or when the air interface is in an interference period, adopting the processing mode for the data packet of the service; or when the access network equipment is in congestion, adopting the processing mode for the data packet of the service.

With reference to the ninth aspect, in some implementation manners of the ninth aspect, a correspondence between the air interface situation and the processing manner includes: when the air interface condition accords with a random packet loss model, adopting the network coding mode for the data packet of the service; or when the air interface condition accords with a continuous packet loss model, adopting the active retransmission mechanism for the data packet of the service.

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

With reference to the ninth aspect, in some implementations of the ninth aspect, the packet header of the service further includes second indication information, where the second indication information indicates that the access network device sends the packet in a non-acknowledgement retransmission manner, or the second indication information indicates that the access network device sends the packet in an acknowledgement retransmission manner.

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

In a tenth aspect, there is provided a communication system comprising: an application function network element and a session management function network element; the application function network element is used for sending second requirement information of a service or a request for subscribing air interface parameters to the session management function network element, wherein the second requirement information is used for indicating that the service requires high reliability and low time delay; the session management function network element is configured to send first information to an access network device according to the second requirement information or the request for subscribing to an air interface parameter, where the first information is used to instruct the access network device to report the air interface parameter to a user plane function network element or the session management function network element, the air interface parameter is used to describe an air interface condition, and the air interface condition is used to determine a processing mode of a data packet of the service, and the processing mode includes: an active retransmission mechanism and/or a network coding mode; 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 an air interface situation; the application function network element determines a processing mode of a data packet of a service according to the air interface condition, wherein the processing mode comprises the following steps: an active retransmission mechanism and/or a network coding mode; and the application function network element processes the data packet of the service according to the processing mode.

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

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 that the processing manner is adopted 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 configured to determine that the processing mode is adopted for the data packet of the service; or when the air interface is in an interference period, the application function network element is used for determining that the processing mode is adopted for the data packet of the service; or when the access network device is in congestion, the application function network element is used for determining that the processing mode is adopted for the data packet of the service.

With reference to the tenth aspect, in some implementations of the tenth aspect, when the air interface situation accords with a random packet loss model, the application function network element is configured to determine that the network coding mode is adopted for the data packet of the service; or when the air interface condition accords with a continuous packet loss model, the application function network element is used for determining that the active retransmission mechanism is adopted for the data packet of the service.

With reference to the tenth aspect, in some implementation manners of the tenth aspect, the packet header of the service includes third indication information, where the third indication information indicates whether the packet of the service adopts the processing manner, and the third indication information is used by an access network device to determine a second processing manner for the packet, where the second processing manner includes: acknowledged retransmission or unacknowledged retransmission.

With reference to the tenth aspect, in some implementations of the tenth aspect, the packet header of the service further includes fourth indication information, where the fourth indication information indicates that the access network device sends the packet in a non-acknowledgement retransmission manner, or the fourth indication information indicates that the access network device sends the packet in an acknowledgement retransmission manner.

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

In an eleventh aspect, a computer readable medium is provided, which stores a computer program (which may also be referred to as code, or instructions) which, when run on a computer, causes the computer to perform the method of any of the above aspects or any of the possible implementations of any of the above aspects.

In a twelfth aspect, there is provided a communication chip having instructions stored therein which, when run on a computer device, cause the communication chip to perform the method of any one of the above aspects or any possible implementation thereof.

In a thirteenth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of the above aspects or any possible implementation thereof.

Drawings

FIG. 1 is a schematic diagram of an architecture of a 5G system to which the present application is applied;

FIG. 2 is a schematic flow chart of a communication method provided herein;

FIG. 3 is a schematic flow chart of yet another communication method provided herein;

FIG. 4 is a schematic flow chart of yet another communication method provided herein;

FIG. 5 is a schematic block diagram of a computer device embodying the present application;

Fig. 6 is a schematic block diagram of a communication device provided herein.

Detailed Description

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

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

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

The UE may also be referred to as a terminal device. The terminal device may communicate with one or more Core Networks (CNs) via the RAN device. A terminal device can be called an access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless network device, user agent, or user equipment. The terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other device connected to a wireless modem, an in-vehicle device, a wearable device or internet of things, a terminal device in a vehicle network, a home gateway (customer premise equipment, CPE), a terminal device of any form in a future network, etc.

The RAN device may be a radio access network (radio access network, RAN) device. An example of a RAN device is a Base Station (BS).

A base station, which may also be referred to as a base station device, is a device that accesses terminals to a wireless network, including but not limited to: a transmission reception point (transmission reception point, TRP), a 5G node B (gNB), an evolved node B (eNB), a radio network controller (radio network controller, RNC), a Node B (NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved nodeB, or home node B, HNB), a baseband unit (BBU), or a Wifi Access Point (AP), or a small base station device (pico), and the like.

It should be understood that the present application is not limited to a particular type of base station. In systems employing different radio access technologies, the names of base station capable devices may vary. For convenience of description, the above-mentioned devices for providing wireless communication functions for terminals are collectively referred to as a base station in this application.

UPF: it is understood that the naming of the user plane function network elements in the 5G architecture. The user plane functional network element mainly comprises the following functions: data packet routing and transmission, packet detection, service usage reporting, qoS processing, lawful interception, uplink packet detection, downlink data packet storage and other user plane related functions.

AMF: it is understood that the naming of mobility management network elements in a 5G architecture. Wherein, the mobility management network element mainly comprises the following functions: access and mobility related functions such as connection management, mobility management, registration management, access authentication and authorization, reachability management, security context management, etc.

SMF: it is understood that the naming of the session management network element in the 5G architecture. The session management network element mainly performs the functions of session management, PCF issuing control strategy execution, UPF selection, UE IP address allocation and the like.

PCF: it is understood that the naming of the policy control function network element in the 5G architecture. The policy control function network element is mainly responsible for charging, service quality (quality of service, qoS) bandwidth guarantee, mobility management, policy decision of UE and other policy control functions aiming at session and service flow levels. In this system, the PCFs to which the AMF and the SMF are connected are an access and mobile control PCF (PCF for access and mobility control, AM PCF) and an SM PCF, respectively, which may not be the same PCF entity in an actual deployment.

UDM: it is understood that the naming of the network elements in the 5G architecture is unified. Wherein, unified data management network element mainly includes following function: unified data management, authentication credentials handling in 3GPP authentication and key agreement mechanisms, user identity handling, access authorization, registration and mobility management, subscription management, short message management, etc.

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

DN: a data network for identifying an operator network access point name. In this application, the DN may also include an authentication, authorization, and accounting (authentication, authorization, accounting, AAA) server function responsible for performing secondary authentication on the user.

AF: it is understood that the naming of the application function network elements in the 5G architecture. The application function network element mainly delivers requirements of the application side on the network side, such as 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 the present application, a multi-access edge computing (MEC) platform or application server may communicate with the 5G core network as an AF network element. The AF network element may directly interface with the PCF network element, or the AF network element may also interface with the PCF network element through a network capability open function entity (network exposure function, NEF), for convenience, only a scenario in which the AF network element directly interfaces with the PCF network element is shown in fig. 1 of the present application, and the AF network element may be easily obtained by combining the prior art and fig. 1 of the present application through a method in which the NEF network element interfaces with the PCF network element.

It will be appreciated that the network elements or functions described above may be either network elements in a hardware device, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (e.g., a cloud platform). Alternatively, the network element or the function may be implemented by one device, or may be implemented by a plurality of devices together, or may be a functional module in one device, which is not specifically limited in this embodiment of the present application.

Wherein, each interface function is described as follows:

n1: the interface between the AMF and the UE, access independent, is used to deliver QoS control rules etc. to the UE.

N2: and an interface between the AMF and the RAN, which is used for transmitting radio bearer control information and the like from the core network side to the RAN.

And N3: an interface between the RAN and the UPF for transferring user plane data between the RAN and the UPF.

N4: the interface between SMF and UPF is used for transferring information between control plane and user plane, including control plane-oriented forwarding rule, qoS control rule, flow statistics rule, etc. issuing and user plane information reporting.

N5: and the interface between the AF and the PCF is used for issuing application service requests and reporting network events.

N6: an interface between the UPF and DN connections for transferring user plane data between the UPF and DN.

N7: the interface between PCF and SMF is used to issue protocol data unit (protocol data unit, PDU) session granularity and traffic data flow granularity control policies.

N8: the interface between the AMF and the UDM is used for the AMF to acquire subscription data and authentication data related to access and mobility management from the UDM, and the AMF registers the current mobility management related information of the UE from the UDM.

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

N10: and the interface between the SMF and the UDM is used for the SMF to acquire session management related subscription data from the UDM, registering the current session related information of the UE from the UDM, and the like.

N11: an interface between the SMF and the AMF for conveying PDU session tunnel information between the RAN and the UPF, conveying control messages sent to the UE, conveying radio resource control information sent to the RAN, etc.

N12: and an interface between the AMF and the AUSF for carrying out identity authentication on the terminal equipment.

N13: and an interface between the UDM and the AUSF for transmitting authentication parameters and transmitting authentication results.

N14: an interface between the two AMFs for passing user context to support movement across the AMFs.

N15: and the interface between the PCF and the AMF is used for issuing UE strategies and access control related strategies.

N22: and the interface between the AMF and the NSSF is used for selecting the slice and acquiring the slice information allowed by the terminal.

N33: an interface between the NEF and the AF for the third party application to obtain capability opening information from the mobile network and to provide application information to the mobile network.

It should be noted that the naming of each network element (such as 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 5G networks and other networks in the future, the above-mentioned network elements may also be named, which is not specifically limited in the embodiments of the present application. For example, in a 6G network, some or all of the above network elements may use the terminology in 5G, and other names may also be used, which is generally described herein and not described in detail herein.

It should be understood that the present application is not limited to the system architecture shown in fig. 1. For example, more or fewer network elements or devices may be included in a communication system to which the communication methods of the present application may be applied. The device or network element in fig. 1 may be hardware, or may be functionally divided software, or a combination of both. The devices or network elements in fig. 1 may communicate with each other via other devices or network elements.

It should be appreciated that in the embodiments described herein, the UE has established an application layer connection with the AF network element, e.g., 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 request to play a VR video from the AF network element. The connection of the application layer between the UE and the AF network element may be sent through a PDU session established by the UE in the 5G network, i.e. the UE uses an IP address corresponding to the PDU session to communicate with the AF network element. In the 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, may also be different network elements, which is not limited in this application.

A schematic flow chart of a communication method of an embodiment of the present application is shown in fig. 2. It should be understood that fig. 2 illustrates steps or operations of the communication method, but these steps or operations are only examples, and other operations or variations of the operations in fig. 2 may also be performed by the present application.

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

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, the high reliability refers to that the service has a precision requirement on the no-packet loss rate or the no-packet error rate, specifically, the no-packet loss rate or the no-packet error rate reaches 99.999%, which is not limited in the application; for example, low latency refers to the time consuming requirement of the traffic for data transmission, which may be, in particular, 1ms, or 10ms, and the like, which is not limited in any way by the present application. The second requirement information of the service may include indication information for indicating that the service is high reliability and low latency. Further, the requirement information of the service may further include: the maximum delay value required by the service, the maximum packet loss rate or the maximum error rate acceptable by the service, and the like.

The second requirement information may also include description information of the service, such as application identification or packet filters for describing data flows of the service, such as quintuple information, for example.

The second requirement information may also include other QoS information, such as, for example, a maximum bandwidth requirement required by the service, etc.

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

The PCC rule may include information such as maximum delay, maximum bit error rate, or maximum packet loss rate that the service can accept. The PCC rule may further 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, wherein the N2 message comprises first requirement information.

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

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

The first requirement information is used for indicating that the service is a low-delay 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 further include a delay requirement, a packet loss rate requirement, or an error rate requirement of the service.

The base station determines a processing mode of the data packet of the service according to the content of the first requirement information, wherein the processing mode can comprise: active retransmission mechanisms and/or network coding schemes.

The base station determines the processing mode of the data packet of the service, which comprises the following steps:

in one implementation, the base station receives a processing manner for the service from the SMF network element, and correspondingly, the N2 message further includes the processing manner for the service. When the processing mode of the data packet of the service is an active retransmission mechanism, the number of active retransmission times can be further indicated in the N2 message; or when the processing mode of the data packet of the service is a network coding mode, the N2 message may further indicate network coding algorithm information, where the network coding algorithm information is used to indicate the network coding mode, for example, a common network coding algorithm includes: hamming codes, RS (reed-solomon) codes, BCH codes, etc. The algorithm information of the network coding includes specific parameters of the algorithm besides the network coding algorithm, for example, taking RS code as an example, the parameters of the algorithm include a generating matrix, and the specific parameters of the network coding algorithm need to be determined according to the specific algorithm, which is not described here again. In a specific implementation, the N2 message may carry a number, where the number indicates an algorithm of network coding and parameter information thereof, and the base station may determine the algorithm of network coding and parameters thereof according to the number, for example, the base station may configure a correspondence between the number and the algorithm of network coding and parameters, or the number points to the algorithm and parameters of network coding that are well known (i.e. standardized). It should be noted that, when the network coding mode is adopted, the N2 message may only carry the algorithm information of the network coding (that is, the algorithm information carrying the network coding implies that the network coding mode is adopted), or may indicate that the network coding mode is adopted and further carry the algorithm information of the network coding.

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

Or in another implementation manner, the base station determines the processing manner of the service according to the first requirement information, that is, the processing manner of the service is not included in the N2 message. The base station may determine the manner in which the service is handled according to a locally configured policy.

When the base station determines that an active retransmission mechanism is adopted for the data packet of the service, the base station further determines the number of active retransmission times, for example, the base station can determine the number of active retransmission times according to the air interface condition; or when the base station determines that the network coding mode is adopted for the data packet of the service, 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 condition. The base station may configure the network-coded algorithm information to determine the network-coded algorithm information used when processing packets of traffic in a network-coded manner.

Alternatively, the SMF network element may indicate that the service is a low latency high reliability service by a QoS parameter, for example, a specific 5QI is used to indicate that the service is a low latency high reliability service, or when the packet delay amount (packet delay budget, PDB) in the QoS parameter is less than a specified threshold, it indicates that the service flow requires low latency 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 by using the processing mode.

Optionally, the base station may further determine a processing manner adopted by the data packet of the service according to a specific air interface condition. For example:

and under the condition of the air interface being #A, the base station adopts an active retransmission mechanism, namely the base station actively copies the received downlink data packet by N, wherein N is more than or equal to 1, and the N+1 data are sent to the UE through the air interface. When one of the n+1 data packets is successfully transmitted to the UE through the air interface, packet loss is not caused.

By the method, the problem that in a traditional acknowledgement retransmission mode, a base station needs to wait for the timeout retransmission of a timer, so that a subsequent data packet cannot be timely transmitted to the UE due to being blocked can be avoided, and therefore the ultra-low time delay requirement of a service cannot be met. And because the base station sends a plurality of identical data packets, the possibility of packet loss is reduced, thereby meeting the requirements of low time delay and high reliability of the service.

And when the air interface condition is #B, the base station performs a network coding mode on the downlink data packet.

Alternatively, the SMF network element may send the network encoded parameters to the base station, e.g. network encoded algorithm information.

By the method, the UE can still restore the original data packet under the condition of packet loss, and the network coding mode is determined by receiving the algorithm information of the network coding from the SMF network element, so that the time for the UE to decode and acquire the original data packet is saved, and the transmission delay of the data is reduced. Specifically, by increasing redundancy of data transmission, even if the UE cannot receive all the data packets in the data transmission process, the UE may restore the original data packets according to the received partial data packets and combine with the network coding mode, thereby reducing transmission delay of data.

Under the condition of the air interface being #C, the base station can firstly perform network coding on the downlink data, and then adopts an active retransmission mode on the coded data, namely, transmits N+1 data packets to the UE.

Through the mode, the base station can combine the network coding mode and the active retransmission mode, so that the time delay of data transmission is reduced.

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

It should be appreciated that the above-described air interface conditions #a, #b, and #c may be any combination of the following exemplified parameters, including but not limited to: # a: a first parameter; # a: a second parameter; # B: a first parameter; # B: parameters one and two; #C: and a third parameter. Wherein, parameter one: the error rate is greater than a first threshold; and (2) parameters II: the packet loss rate is larger than a second threshold value; and (3) parameters III: the current air interface is in an interference period; parameter four: the base station is in a congested state. Combinations between the various parameters described above are for exemplary purposes only and should not be construed as including just the few described. The first, second, third and fourth are used for distinction purposes only and are not limiting.

Optionally, when the air interface condition is an air interface damage model and accords with a random packet loss model, the base station determines that a network coding mode is adopted for the data packet of the service, or when the air interface condition is an air interface damage model and accords with a continuous packet loss model, the base station determines that an active retransmission mechanism is adopted for the data packet of the service.

It should be understood that the present application is not limited specifically to what type of treatment is specifically used in what air interface situation is desired. Specifically, when the air interface condition is #a, an active retransmission mechanism is selected, or when the air interface condition is #b, an active retransmission mechanism is selected, or when the air interface condition is #c, a mode of combining the active retransmission mechanism and network coding is selected. The present application does not set any limit 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 including a handling manner indicating a data packet for the service, where the handling manner includes: active retransmission mechanisms and/or network coding schemes.

When the SMF network element indicates the processing mode of the base station for the service, the SMF network element may send the corresponding relationship between the air interface condition and the processing mode to the base station.

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

Specifically, when the base station determines that an active retransmission mechanism is adopted for the data packet of the service flow or a network coding mode is adopted, in one implementation manner, the base station configures a bearer (i.e., UM mode) of a non-acknowledgement mode for the data packet of the service flow; or when the base station determines that the active retransmission mechanism or the network coding mode is not adopted for the data packet of the service, the base station can configure the bearer (i.e. the AM mode) of the acknowledgement mode for the data packet of the service flow, that is, when the base station adopts the active retransmission mechanism or the network coding mode for the downlink data packet, the base station sends the data packets to the UE through the bearers corresponding to the non-acknowledgement mode, and when the base station does not adopt the active retransmission mechanism or the network coding mode for the downlink data packet, the base station sends the data packets to the UE through the bearers corresponding to the acknowledgement mode.

When configuring the radio bearer, if a network coding mode is adopted, the base station can send the algorithm information of the network coding to the UE through a bearer configuration message so that the UE decodes the received downlink data packet. When the base station determines that the network coding mode is adopted to process the data packet of the service, if the algorithm information of the network coding is changed, the base station needs to generate new algorithm information of the network coding to the UE so that the UE decodes the downlink data packet.

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

Optionally, when the base station is in congestion, the base station may reduce the downlink transmission rate and increase the downlink data buffer value, so as to avoid aggravating the blocking 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 manner in which the base station processes the data packets of the service.

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 the base station determines 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 an active retransmission mechanism, the base station processes the data packet of the service according to the processing mode, including: the base station processes the data packet of the service according to the active retransmission mechanism and the number of active retransmission times; or when the processing mode is a network coding mode, the base station processes the data packet of the service according to the processing mode, and the method comprises the following steps: and the base station processes the data packet 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 by the SMF network element notification, which is not limited in this embodiment of the present application.

Optionally, the base station may also determine a processing manner of the data packet of the service by acquiring an air interface parameter measurement report sent by the UE and combining the first requirement information and the air interface condition after determining the air interface condition.

S209, the UE receives the downlink data packet.

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

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

In the technical solution of the foregoing embodiment, the base station determines a processing manner of a data packet of the service by receiving first requirement information sent by the SMF network element, and may also determine an air interface condition by acquiring an air interface parameter measurement report sent by the UE, and determine the processing manner of the data packet in combination with the first requirement information. By the method, the processing mode of the data packet of the service can be determined by the base station according to the real-time change of the air interface state.

A schematic flow chart of a communication method according to another embodiment of the present application is shown in fig. 3. It should be understood that fig. 3 illustrates steps or operations of the communication method, but these steps or operations are only examples, and other operations or variations of the operations in fig. 3 may also be performed by the present application.

S301-S302, through the foregoing steps S201-S202, are not repeated here.

S303, the SMF network element receives PCC rules sent by the PCF network element, and determines to process the enhanced reliability mechanism for enabling the data packet of the service based on the PCC rules, wherein the reliability mechanism comprises: active retransmission mechanisms and/or network coding schemes.

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

For example, if the maximum time delay required by the service is smaller than the air interface retransmission reaction time, the SMF network element determines that the base station adopts a non-acknowledgement retransmission mode to process the data packet of the service.

Optionally, the SMF network element may determine that the active retransmission mechanism is enabled according to the maximum packet loss rate, for example, further, the SMF network element may determine the number of active retransmissions according to the maximum packet loss rate.

Alternatively, the SMF network element may determine the method of network coding according to the maximum packet loss rate. The network coding mode can increase the redundancy of data, namely, when the UE receives the data packet processed by the network coding mode, the packet loss phenomenon occurs in the transmission process, and the UE can recover the original data packet according to the received data packet. For example, when the maximum packet loss rate is too large, to reduce the possibility of packet loss, the SMF network element may determine a network coding method, thereby reducing the possibility of packet loss.

S304, the UPF network element receives a first rule from the SMF network element, where the first rule is used to indicate a processing manner of a data packet of a service, and the processing manner includes: active retransmission mechanisms and/or network coding schemes.

Optionally, the first rule may include a correspondence between an air interface condition and a processing manner of a data packet of the service, and specifically, the correspondence includes:

and when the error rate is larger than a first threshold, or the packet loss rate is larger than a second threshold, or the air interface is in an interference period, or the base station is in congestion, determining to adopt the processing mode to the data packet of the service.

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

And when the air interface condition is an air interface damage model and accords with a random packet loss model, determining that a network coding mode is adopted for the data packet of the service, or when the air interface condition is an air interface damage model and accords with a continuous packet loss model, determining that an active retransmission mechanism is adopted for the data packet of the service.

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

The UPF network element determines, based on the first rule, that an enhanced processing manner is adopted for the data packet of the service, for example, when the processing manner is an active retransmission mechanism, the UPF network element processes the data packet of the service according to the processing manner, including: the UPF network element processes the data packet of the service according to the active retransmission mechanism and the number of active retransmission times; or when the processing mode is a network coding mode, the UPF network element processes the data packet of the service according to the processing mode, and the processing method comprises the following steps: and the UPF network element processes the data packet 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.

And S305, the SMF network element sends an N2 message to the base station, wherein the N2 message is used for indicating the base station to establish a radio bearer corresponding to the service.

The N2 message includes first information, where the first information is used to instruct the base station to report an air interface parameter to the UPF network element or the SMF network element, and the air interface parameter is used to describe an air interface situation, where the air interface situation can be used to determine a processing mode of the data packet of the service. For example, the SMF network element instructs the base station to report information such as packet loss rate, bit error rate, and congestion indication of the base station caused by non-congestion. The first information may indicate a trigger condition for the base station to report the air interface parameter, e.g., report the air interface parameter when the air interface condition reaches a certain threshold, e.g., send the air interface parameter when the packet loss rate reaches a first threshold, send the air interface parameter when the error rate reaches a second threshold, etc.

The N2 message includes second information, where the second information is used to indicate that the base station has actively retransmitted or adopted network coding for the service flow corresponding to the service, or the second information is used to indicate that the base station does not adopt an AM mode for the service flow of the service. The SMF may indicate, via the QoS parameter of the service, that the base station does not use AM for the traffic flow of the service, e.g. a specific 5QI, or may indicate the need by a special indication.

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

Optionally, the N2 message may further include fourth information, and the fourth information may further specify bandwidths when the QoS flows are respectively transmitted through the primary and secondary base stations, for example, a primary base station link 1M bandwidth, a secondary base station link 1M bandwidth (total 2M bandwidths). Accordingly, the base station may configure air interface resources of the primary and secondary base stations for the QoS flow through dual connection transmission. If the UPF network element performs downlink splitting, the base station sends downlink tunnel information of the main base station and the auxiliary base station to the SMF network element, so that the SMF network element further sends the uplink tunnel information to the UPF network element, where the SMF network element may instruct the UPF network element to split the service according to a principle of splitting, for example, sending data packets of the service on two links according to a certain bandwidth ratio (for example, the bandwidths of the two links are the same), and the UPF network element performs splitting of the downlink data packets according to the splitting principle.

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

S306, the base station configures 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 may perform the following processing on the traffic flow of the service:

mode #1: the base station determines, based on the second information, that the AM mechanism is not enabled for the QoS flow. In the method, the base station does not start a reliable retransmission mechanism for the downlink data packet corresponding to the QoS flow, so that the blocking of the transmission of the subsequent data packet due to packet loss can be avoided.

Mode #2: for each downlink data packet, the base station decides whether to enable the AM mechanism according to whether the UPF network element enables the enhanced reliability mechanism (i.e., the active retransmission mode and/or the network coding mode processes the data packet). The base station can determine whether the UPF adopts an enhanced reliability mechanism according to the downlink data packet header, namely the indication information in the GPRS tunneling protocol user plane (GPRS tunnel protocol user plane, GTP-U), if the packet header of the data packet indicates that the UPF network element starts the enhanced reliability mechanism, the base station directly transmits the data packet to the UE in a non-acknowledgement mode. Or if the packet header of the data packet indicates that the UPF network element does not adopt the enhanced reliability mechanism, the base station transmits the data packet to the UE in an acknowledgement mode (i.e. an AM mode).

It should be noted that, the base station may configure different radio bearers for QoS flows of the service in an AM mode and in a non-AM mode. Specifically, when the data packet of the QoS flow is sent in an AM manner, the base station sends the data packet through a radio bearer corresponding to the AM manner; when the non-AM mode is adopted for transmitting, the base station transmits the data packet through a radio bearer corresponding to the non-AM mode. The terminal may determine, according to the configuration of the radio bearer, whether the radio bearer corresponds to an AM mode or a non-AM mode.

If the N2 message also includes third information, the base station allocates resources of the main and auxiliary base stations for the service according to the third information. If the fourth information indicates the proportion information sent by the main base station and the auxiliary base station, the base station carries out the configuration of the radio bearer according to the proportion information, and if the UPF distributes downlink service, the base station respectively distributes the downlink tunnel information of the main base station and the auxiliary base station.

S307, the base station transmits a response message.

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

Alternatively, the base station may send the radio bearer configuration result to the SMF network element, e.g. whether the bearers of the primary and secondary base stations are 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, the method is used for reporting the processing mode of the data packet of the service by the base station.

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

And according to the content of the first information, the base station reports a first air interface parameter report to the UPF network element or the SMF network element, wherein the first air interface parameter report is used for describing the air interface condition. 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 the GTP-U.

Optionally, the first information sent by the SMF network element may carry a trigger condition specifying that the base station sends the air interface parameter, for example, the frequency of sending the air interface parameter, or send when the packet loss rate and the bit error rate reach a certain threshold, send when the base station is congested, or send when the base station is congested. And the base station reports the air interface parameters to the UPF network element or the SMF network element according to the triggering conditions set by the SMF network element. If the SMF network element instructs the base station to perform air interface measurement, the base station may also start air interface measurement (how to perform air interface measurement may refer to the existing protocol, which is not described herein in detail), and report the measured result to the UPF network element or the SMF network element.

Steps S311a and S311b are steps for the SMF network element to receive and process the air interface parameter report:

In step 311a, the smf network element processes the 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 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 within an interference period. The SMF network element may also perform more complex processing on the air interface parameter, for example, the received air interface parameter is input into machine learning software, the machine learning software outputs a result, and the SMF network element determines the air interface condition according to the output result.

In step 311b, the smf updates the first rule.

And when the SMF network element determines that the first rule needs to be updated according to the air interface condition, the SMF network element sends the updated first rule to the UPF network element. For example, when the 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 mode needs to be adjusted (for example, the redundancy proportion needs to be increased), and then the SMF network element redetermines the first rule and sends the updated first rule to the UPF network element, so that the UPF network element processes the data packet of the service according to the updated first rule.

Optionally, when the air interface condition is changed into an air interface damage model and accords with a random packet loss model, the SMF network element determines to change the processing mode of the data packet of the service into a network coding mode; or when the air interface condition is changed into an air interface damage model and accords with a continuous packet loss model, the SMF network element determines that the processing mode of the data packet of the service is changed into an 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 packet of the service according to the new processing mode.

Optionally, when the SMF network element senses congestion of the base station, the SMF network element may change the first rule so as to inform the UPF network element to adjust the downlink transmission rate downwards, and increase the size of the downlink data buffer. The downlink sending rate is adjusted downwards so as to reduce the data packets sent to the base station, thereby relieving the empty congestion, and the buffer is increased so as to lose packets on the UPF network element due to buffer overflow caused by speed reduction.

S311c, the UPF network element processes the 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 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 within an interference period. The UPF network element may also perform more complex processing on the air interface parameters, for example, the air interface parameters are input into machine learning software, the machine learning software outputs a result, and the UPF network element determines the air interface condition according to the output result.

When the air interface condition is an air interface damage model, the UPF network element can analyze the damage model of the air interface 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 a random packet loss model, the UPF network element adopts a network coding mode, and 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 packet.

The UPF network element determines a processing mode of the downlink data packet according to a 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 the processed data packet to the UE.

Optionally, the UPF network element may further determine a processing manner of the data packet of the service according to the air interface situation and in combination with the first rule, and the determining process may refer to the foregoing step S203, which is not described herein.

Optionally, if the UPF network element adopts an active retransmission mechanism or a network coding manner, the UPF network element may carry first indication information in a GTP-U header, where the first indication information is used to indicate that the data packet adopts the processing manner, and the first indication information is further used by the base station to determine a first processing manner for the data packet, where the first processing manner includes: acknowledged retransmission or unacknowledged retransmission. For example, when the first indication information indicates that the data packet adopts an active retransmission and/or network coding mode, the first processing mode may be a non-acknowledgement retransmission mode, or when the first indication information indicates that the data packet does not adopt an active retransmission or network coding mode (or does not carry the first indication information), the first processing mode may be an acknowledgement retransmission mode. The base station can then determine whether the data packet bypasses the AM mode based on the first indication. 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 a non-acknowledgement retransmission manner.

Optionally, when the UPF network element senses congestion of the base station, the UPF network element may adjust the downlink transmission rate downward, and increase the size of the downlink data buffer. The downlink sending rate is adjusted downwards so as to reduce the data packets sent to the base station, thereby relieving the empty congestion, and the buffer is increased so as to lose packets on the UPF network element due to buffer overflow caused by speed reduction.

S313, the UE receives the downlink data packet.

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

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

In the technical solution of the foregoing embodiment, the UPF network element receives the first rule from the SMF network element, determines the processing manner based on the first rule, and processes the data packet of the service according to the processing manner, and the base station may determine to process the data packet of the service by using the unacknowledged retransmission manner according to the SMF or UPF indication information, so as to avoid the phenomenon that the transmission of the subsequent data packet is blocked when the existing acknowledged retransmission mechanism is worse in the face of the air interface condition due to the fact that acknowledgement feedback of the terminal cannot be received in time, thereby reducing the data transmission delay.

A schematic flow chart of a communication method of a further embodiment of the present application is shown in fig. 4. It should be understood that fig. 4 illustrates steps or operations of the communication method, but these steps or operations are merely examples, and that embodiments of the present application may also perform other operations or variations of the operations in fig. 4.

S401, PCF network element receives service information sent by AF network element, the service information is used for indicating requirement information of service.

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

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 also indicates that the service is a low latency service. Alternatively, the service may be indicated as a low-latency service by the service information, for example, the service information includes a latency requirement of the service, and the service may be determined to be a low-latency service according to the latency requirement. Alternatively, 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 high service.

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

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

Optionally, if the AF network element sends an 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 special indication or may be indicated by the value of the latency requirement and/or by 5 QI.

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 needs the low-delay report, the SMF network element informs the UPF network element to directly send the air interface information report to the AF network element. The SMF network element may send a notification address of the AF network element to the UPF network element, which uses the notification address to send an air interface information report to the AF network element.

S404, this step may refer to the aforementioned step S305, which is not described herein.

S405, which is similar to the previous step S306. But the difference between them is that in this step S405, the UE may be informed directly of the network coding algorithm by the AF network element. When the network coding is notified to the UE by the SMF network element through NAS information, the AF network element transmits the parameters of the network coding to the PCF network element and further to the SMF network element by the PCF network element in the aforementioned steps S401, S402 and S403.

S406-S408 are the same as the steps S205-S207 described above, and are not described here again.

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 an air interface situation.

The UPF network element or the SMF network element may 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 processes the received information first, and then sends the processed result to the AF network element.

The processing of the air interface parameter by the UPF network element or the SMF network element can be referred to the aforementioned step S311, and will not be described herein.

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

The AF network element determines a processing manner of the data packet of the service according to the air interface condition, and the processing method can refer to the aforementioned step S203, which is not described herein.

When the AF network element determines that active retransmission and/or network coding is adopted for the data packet of the service, the AF network element may carry sixth indication information in a header of the data packet, where the sixth indication information is used to indicate that the data packet of the service adopts an active retransmission mechanism and/or a network coding mode (for example, the indication information is carried in an IP packet header, or the indication information is carried in a real-time transport protocol (real-time transport protocol, RTP) packet header, or the indication information is carried in a custom field, which is not limited in how to implement the embodiment specifically). When the UPF network element receives the data packet, the AF network element can determine whether an active retransmission mechanism and/or a network coding mode is adopted for the data packet according to sixth indication information carried in the data packet, and further, the UPF network element can carry third or fourth indication information in a GTP-U packet header, so that a base station can conveniently determine to send the data packet of the service in a non-acknowledgement retransmission mode according to the indication information.

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 packet is repeated, and if so, the repeated data packet is discarded. The UE may perform packet repetition detection according to the application layer information, for example, if the application layer information of the packet includes a sequence number of the packet, the UE may determine whether to repeat according to the sequence number. The UE may also determine whether the packet is repeated through the number of the PDCP layer, e.g., the base station uses the same PDCP number when transmitting the repeated packet.

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

In the technical solution of the foregoing embodiment, the AF network element determines the air interface condition by acquiring the second air interface parameter report, determines a processing manner of the data packet of the service according to the air interface condition, and then processes the data packet of the service according to the processing manner, so as to avoid a phenomenon that transmission of a subsequent data packet is blocked when the existing acknowledgment retransmission mechanism faces the air interface condition deterioration due to failure to timely receive acknowledgment feedback of the terminal, and reduce delay of data transmission.

Fig. 5 shows a schematic block diagram of a communication device 500 to which embodiments of the present application are applied. Any of the network elements involved in any of the methods 200 to 400 described above, 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, a component (e.g., an integrated circuit, a chip, etc.) of the physical device, or 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 performing the methods of embodiments of the present application. Optionally, an interface may be invoked in the processor 501 to implement the receive and transmit 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. The transceiver circuitry, or interface circuitry, for implementing the receive and transmit functions may be separate or may be integrated. The transceiver circuit or the interface circuit may be used for reading and writing codes/data, or the transceiver circuit or the interface circuit may be used for transmitting or transferring signals.

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

Optionally, the communication device 500 may also include a memory 502. The specific deployment location of the memory 502 is not specifically limited in the embodiments of the present application, and the memory may be integrated into the processor or may be independent of the processor. In the case where the communication device 500 does not include memory, the communication device 500 may be provided with processing functionality, and the memory may be disposed in other locations (e.g., a cloud system).

The processor 501, memory 502 and transceiver 503 communicate with each other via internal communication paths to communicate control and/or data signals.

It is to 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.

Alternatively, in some embodiments, memory 502 may store execution instructions for performing the methods of embodiments of the present application. The processor 501 may execute instructions stored in the memory 502 in conjunction with other hardware (e.g., transceiver 503) to perform the steps of the method execution shown below, and specific operational procedures and advantages may be found in the description of the method embodiments below.

The method 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 capabilities. In implementation, the steps of the method may be performed by integrated logic circuitry in hardware in a processor or by instructions in software. The processor may be a general purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a memory medium well known in the art such as random access memory (random access memory, RAM), flash memory, read-only memory (ROM), programmable read-only memory, or electrically erasable programmable memory, registers, and the like. The storage medium is located in a memory, and the processor reads instructions from the memory and, in combination with its hardware, performs the steps of the method described above.

It is to be appreciated that memory 502 can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory ROM, a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a 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 RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and direct memory bus RAM (DR RAM).

It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Fig. 6 shows a schematic block diagram of a communication device 600 according to an embodiment of the present application. Alternatively, 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 the embodiments of the present application. As shown in fig. 6, the communication apparatus 600 includes a transceiving unit 610 and a processing unit 620.

In particular, the communication device 600 may be any network element referred to in the present application, and may implement a function that can be implemented by the network element. It should be appreciated that the communication apparatus 600 may be a physical device, a component (e.g., an integrated circuit, a chip, etc.) of a physical device, or a functional module in a physical device.

Illustratively, the communications apparatus 600 may be employed to implement the functionality of a base station in the present application. The communication device includes: the transceiver unit 610 is configured to receive the N2 message from the SMF network element, and refer to the detailed description of the content included in the N2 message in the foregoing step S203 and the foregoing step S305, which are not described herein again; the method comprises the steps that an air interface parameter measurement report sent by UE is received, and the air interface parameter measurement report is used for describing an air interface condition; for receiving downlink data packets; for sending a response message to the SMF network element.

It should be understood that the foregoing is only exemplary, and the transceiver unit 610 will also be used to perform all the transceiving operations related to the base station in the foregoing methods 200 to 400, and can achieve the beneficial effects corresponding to the method side, which are not repeated herein for brevity of description.

A processing unit 620, configured to determine a processing manner 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 manner; the method is used for determining the air interface condition according to the air interface parameter measurement report sent by the UE, and determining the processing mode of the data packet of the service according to the air interface condition; for configuring a specific bearer mode for a traffic flow of the service; the method is used for deciding to reduce the downlink data sending rate and increase the data caching value according to the congestion condition.

It should be understood that the foregoing is only exemplary, and the processing unit 620 is further configured to perform all the processing operations related to the base station in the foregoing methods 200 to 400, and achieve beneficial effects corresponding to the method side, which are not described herein for brevity.

It should be understood that, in this implementation manner, the communication apparatus 600 may correspond to the base station in the foregoing method embodiment, and the foregoing and other management operations and/or functions of each module in the communication apparatus 600 are respectively for the corresponding steps of the base station in the foregoing methods 200 to 400, so that the beneficial effects in the foregoing method embodiment may also be achieved, which is not repeated herein for brevity.

Illustratively, the communications apparatus 600 can be configured to implement the functionality of the user plane functional network elements in the present 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 manner of a data packet of a service; the method comprises the steps of receiving a first air interface parameter report from a base station, wherein the first air interface parameter report is used for describing an air interface condition; for receiving downstream data packets.

It should be understood that the foregoing is merely exemplary, and the processing unit 620 is further configured to perform all the transceiving operations related to the user plane function network elements in the foregoing methods 200 to 400, and achieve beneficial effects corresponding to the method side, which are not described herein for brevity.

A processing unit 620, configured to determine a processing manner of the data packet of the service according to the first rule; the processing mode of the data packet of the service is determined according to the acquired air interface condition; the data packet is used for processing the service; and when the base station is perceived to be in congestion, the downlink sending rate is reduced, and the data caching value is increased.

It should be understood that the foregoing is only an exemplary description, and the processing unit 620 is further configured to perform all the processing operations related to the user plane function network element in the foregoing methods 200 to 400, and achieve the beneficial effects corresponding to the method side, which are not described herein for brevity.

It should be understood that in this implementation manner, the communication apparatus 600 may correspond to the user plane function network element in the foregoing method embodiment, and the foregoing and other management operations and/or functions of each module in the communication apparatus 600 are respectively for the corresponding steps of the user plane function network element in the foregoing methods 200 to 400, so that the beneficial effects in the foregoing method embodiment may also be achieved, which is not repeated herein for brevity.

Illustratively, the communications arrangement 600 may be used to implement the functionality of the application function network element in the present application. The communication device includes: a processing unit 610, configured to send a second requirement message of a service to the PCF network element, where the second requirement message is used to indicate a requirement of low latency and high reliability of the service; for receiving a response message from the PCF network element; for receiving a second air interface parameter report from the UPF network element, the second air interface parameter report describing an air interface condition.

It should be understood that the foregoing is merely exemplary, and the processing unit 620 is further configured to perform all the transceiving operations related to the application function network element in the foregoing methods 200 to 400, and achieve beneficial effects corresponding to the method side, which are not described herein for brevity.

A processing unit 620, configured to determine a processing manner of the data packet of the service according to the acquired air interface condition; and the data packet for the service is processed according to the determined processing mode.

It should be understood that the foregoing is only an exemplary description, and the processing unit 620 is further configured to perform all the processing operations related to the application function network element in the foregoing methods 200 to 400, and achieve beneficial effects corresponding to the method side, which are not described herein for brevity.

It should be understood that, in this implementation manner, the communication apparatus 600 may correspond to the application function network element in the foregoing method embodiment, and the foregoing and other management operations and/or functions of each module in the communication apparatus 600 are respectively for the corresponding steps of the application function network element in the foregoing methods 200 to 400, so that the beneficial effects in the foregoing method embodiment may also be implemented, which is not repeated herein for brevity.

Illustratively, the communications apparatus 600 may be configured to implement the functionality of the session management function network element in the present application. The communication device includes: a processing unit 610, configured to receive second requirement information of a service from an application function network element or a request of the application function network element for subscribing to an air interface parameter, where the second requirement information is used to indicate that the service requires low latency and high reliability; for receiving a response message from the PCF network element.

It should be understood that the foregoing is merely exemplary, and the processing unit 620 is further configured to perform all the transceiving operations related to the session management function network element in the foregoing methods 200 to 400, and achieve the beneficial effects corresponding to the method side, which are not described herein for brevity.

And the processing unit 620 is configured to send, to the access network device, first information according to the second requirement information or the request for subscribing to the air interface parameter, where the first information is used to instruct the access network device to report the air interface parameter to the user plane function network element or the session management function network element, and the air interface parameter is used to describe an air interface condition, where the air interface condition is used to determine a processing manner of a data packet of a service.

It should be understood that the foregoing is only an exemplary description, and the processing unit 620 is further configured to perform all processing operations related to the session management function network element in the foregoing methods 200 to 400, and achieve beneficial effects corresponding to the method side, which are not described herein for brevity.

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 embodiment, and the foregoing and other management operations and/or functions of each module in the communication apparatus 600 are respectively for the corresponding steps of the session management function network element in the foregoing methods 200 to 400, so that the beneficial effects in the foregoing method embodiment may also be achieved, which is not repeated herein for brevity.

It should also be understood that the apparatus 600 may also be used to implement the functions of PCF network elements in the above method embodiments, where the transceiver unit 610 may be used to implement operations related to receiving and transmitting, and the processing unit 620 may be used to implement operations other than receiving and transmitting, and in particular, reference may be made to the descriptions in the above method embodiments, which are not listed here.

In addition, in the present 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, an electronic circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the described functionality. In a simple embodiment, one skilled in the art will appreciate 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 transceiving unit 610 may be implemented by the transceiver 503 shown in fig. 5. The transceiver 503 includes a receiving function and a transmitting function. In particular, the processor is implemented by executing a computer program stored in a memory. Alternatively, when the apparatus 500 is a chip, the functions and/or implementation procedures of the transceiver unit 610 may also be implemented by pins or circuits, etc. Alternatively, the memory may be a storage unit in the chip, such as a register, a cache, or the like, and the storage unit may also be a storage unit in the computer device that is located outside the chip, such as the memory 502 shown in fig. 5, or may be a storage unit disposed in another system or device, which is not in the computer device. Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

Various aspects or features of the present application can be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein encompasses a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, or magnetic strips, etc.), optical disks (e.g., compact disk, CD, digital versatile disk, digital versatile disc, DVD, etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory, EPROM), cards, sticks, 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" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

The present application also provides a computer readable medium having stored thereon a computer program which, when executed by a computer, performs the functions of any of the method embodiments described above.

The present application also provides a computer program product which, when executed by a computer, implements the functions of any of the method embodiments described above. In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may 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, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., 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, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

It should be appreciated that reference throughout this specification to "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, various embodiments are not necessarily referring to the same embodiments throughout the specification. 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 sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

It should also be understood that, in this application, "when …," "if," and "if" all refer to that the UE or the base station will make a corresponding process under some objective condition, and are not limited in time, nor do they require that the UE or the base station must have a judgment action when it is implemented, nor are they meant to have other limitations.

In addition, the terms "system" and "network" are often used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone.

The term "at least one of … …" or "at least one of … …" herein means all or any combination of the listed items, e.g., "at least one of A, B and C," may mean: there are six cases where A alone, B alone, C alone, both A and B, both B and C, and both A, B and C.

In this application, unless specifically stated otherwise, "at least one" means one or more, and "a plurality" means two or more.

It should be understood that in embodiments of the present application, "B corresponding to a" means that B is associated with a, from which B may be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also determine B from a and/or other information.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method of communication, comprising:

the access network equipment receives first requirement information of a service from a session management function network element;

the access network equipment determines a processing mode of the data packet of the service according to the first requirement information, wherein the processing mode comprises the following steps: an active retransmission mechanism and/or a network coding mode;

and the access network equipment processes the data packet of the service according to the processing mode.
The method of claim 1, wherein,

the first requirement information is used for indicating that the requirement of the service is high reliability and low time delay.
The method of claim 1 or 2, wherein,

when the processing mode is an active retransmission mechanism, the access network device processes the data packet of the service according to the processing mode, including: the access network equipment processes the data packet of the service according to the active retransmission mechanism and the number of active retransmission times; or alternatively, the process may be performed,

when the processing mode is a network coding mode, the access network device processes the data packet of the service according to the processing mode, including: and the access network equipment processes the data packet of the service according to the network coding mode and the algorithm information of the network coding.
A method as claimed in any one of claims 1 to 3, further comprising:

the access network equipment acquires an air interface condition;

the method for processing the data packet of the service is determined by the access network device according to the first requirement information, and includes:

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

the air interface condition includes at least one of: bit error rate, packet loss rate, interference period and congestion condition of the access network equipment.
The method of claim 5, wherein the access network device determining the processing mode according to the first requirement information and the air interface condition comprises:

when the error rate is greater than a first threshold value, the access network equipment determines that the processing mode is adopted for the data packet of the service; or alternatively, the process may be performed,

when the packet loss rate is greater than a second threshold, the access network equipment determines that the processing mode is adopted for the data packet of the service; or alternatively, the process may be performed,

when the air interface is in an interference period, the access network equipment determines that the processing mode is adopted for the data packet of the service; or alternatively, the process may be performed,

And when the access network equipment is in congestion, the access network equipment determines that the processing mode is adopted for the data packet of the service.
The method of claim 6, wherein determining the manner in which the data packets for the service are processed comprises:

when the air interface condition accords with a random packet loss model, the access network equipment determines that the network coding mode is adopted for the data packet of the service; or alternatively, the process may be performed,

and when the air interface condition accords with a continuous packet loss model, the access network equipment determines that the active retransmission mechanism is adopted for the data packet of the service.
The method according to any one of claims 1 to 7, wherein when the processing means is network coding means, the method further comprises:

the access network equipment acquires algorithm information of the network codes;

and the access network equipment sends the algorithm information of the network codes to the terminal equipment.
The method of any one of claims 1 to 8, wherein the method further comprises:

and when the access network equipment is in congestion, the access network equipment reduces the downlink sending rate and increases the downlink data cache value.
A method of communication, comprising:

the user plane function network element receives a first rule from the session management function network element, wherein the first rule indicates a processing mode of a data packet of a service, and the processing mode comprises the following steps: an active retransmission mechanism and/or a network coding mode;

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;

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

when the processing mode is an active retransmission mechanism, the user plane function network element processes the data packet of the service according to the processing mode, and the processing method comprises the following steps: the user plane function network element processes the data packet of the service according to the active retransmission mechanism and the number of active retransmission times; or alternatively, the process may be performed,

when the processing mode is a network coding mode, the user plane function network element processes the data packet of the service according to the processing mode, and the processing method comprises the following steps: and the user plane functional network element processes the data packet of the service according to the network coding mode and the algorithm information of the network coding.
The method of claim 10 or 11, further comprising:

the user plane function network element receives a first air interface parameter report from access network equipment, wherein the first air interface parameter report is used for describing an air interface condition;

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

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

the first rule comprises a corresponding relation 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 comprises:

when the error rate is larger than a third threshold value, adopting the processing mode for the data packet of the service; or alternatively, the process may be performed,

when the packet loss rate is larger than a fourth threshold value, adopting the processing mode for the data packet of the service; or alternatively, the process may be performed,

when the air interface is in an interference period, adopting the processing mode for the data packet of the service; or alternatively, the process may be performed,

And when the access network equipment is in congestion, adopting the processing mode for the data packet of the service.
The method of claim 15, wherein the correspondence between the air interface condition and the processing mode comprises:

when the air interface condition accords with a random packet loss model, adopting the network coding mode for the data packet of the service; or alternatively, the process may be performed,

and when the air interface condition accords with a continuous packet loss model, adopting the active retransmission mechanism for the data packet of the service.
The method according to any one of claim 10 to 16, wherein,

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

the data packet header of the service further includes second indication information, where the second indication information indicates that the access network device sends the data packet in a non-acknowledgement retransmission mode, or the second indication information indicates that the access network device sends the data packet in an acknowledgement retransmission mode.
The method of any one of claims 10 to 18, further comprising:

and when the access network equipment is in congestion, the user plane functional network element reduces the downlink sending rate and increases the downlink data caching value.
A method of communication, comprising:

the application function network element receives a second air interface parameter report, wherein the second air interface parameter report is used for describing an air interface condition;

the application function network element determines a processing mode of a data packet of a service according to the air interface condition, wherein the processing mode comprises the following steps: an active retransmission mechanism and/or a network coding mode;

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

the air interface condition includes at least one of: bit error rate, packet loss rate, interference period and congestion condition of access network equipment.
The method as recited in claim 21, further comprising:

and the application function network element subscribes to the air interface condition.
The method according to claim 21 or 22, wherein the application function network element determining a processing manner of the data packet of the service according to the air interface condition includes:

When the error rate is greater than a fifth threshold, the application function network element determines that the processing mode is adopted for the data packet of the service; or alternatively, the process may be performed,

when the packet loss rate is greater than a sixth threshold, the application function network element determines that the processing mode is adopted for the data packet of the service; or alternatively, the process may be performed,

when the air interface is in an interference period, the application function network element determines that the processing mode is adopted for the data packet of the service; or alternatively, the process may be performed,

and when the access network equipment is in congestion, the application function network element determines that the processing mode is adopted for the data packet of the service.
The method of claim 23, wherein the application function network element determining a processing manner of the data packet of the service according to the air interface condition comprises:

when the air interface condition accords with a random packet loss model, the application function network element determines that the network coding mode is adopted for the data packet of the service; or alternatively, the process may be performed,

and when the air interface condition accords with a continuous packet loss model, the application function network element determines to adopt the active retransmission mechanism to the data packet of the service.
The method of any one of claim 20 to 24,

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

the data packet header of the service further includes fourth indication information, where the fourth indication information indicates that the access network device sends the data packet in a non-acknowledgement retransmission mode, or the fourth indication information indicates that the access network device sends the data packet in a acknowledgement retransmission mode.
A method of communication, comprising:

the session management function network element receives second requirement information of a service from the application function network element or a request of subscribing air interface parameters of the application function network element, wherein the second requirement information is used for indicating that the service requires high reliability and low time delay;

the session management function network element sends first information to the access network device according to the second requirement information or the request for subscribing the air interface parameter, the first information is used for indicating the access network device to report the air interface parameter to the user plane function network element or the session management function network element, the air interface parameter is used for describing an air interface condition, the air interface condition is used for determining a processing mode of a data packet of the service, and the processing mode comprises: active retransmission mechanisms and/or network coding schemes.
The method of claim 27, wherein,

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

and the first information is used for indicating the access network equipment to report the air interface parameter to the user plane functional network element or the session management functional network element when the error rate is greater than or equal to a seventh threshold value, or the packet loss rate is greater than or equal to an eighth threshold value, or an interference period is entered.
The method as recited in claim 29, further comprising:

and the session management function network element sends second information to the access network equipment, wherein the second information is used for indicating the access network equipment to send the data packet of the service in a non-acknowledgement retransmission mode.
A communication apparatus, the apparatus being an access network device, comprising:

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

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

The first processing unit is further configured to process the data packet of the service according to the processing manner.
The apparatus of claim 31, wherein the device comprises,

the first requirement information is used for indicating that the requirement of the service is high reliability and low time delay.
The apparatus of claim 31 or 32, wherein,

when the processing mode is an active retransmission mechanism, the first processing unit processes the data packet of the service according to the processing mode, including: the first processing unit processes the data packet of the service according to the active retransmission mechanism and the number of active retransmission times; or alternatively, the process may be performed,

when the processing mode is a network coding mode, the first processing unit processes the data packet of the service according to the processing mode, and the processing method comprises the following steps: and the first processing unit processes the data packet of the service according to the network coding mode and the algorithm information of the network coding.
The apparatus according to any one of claims 31 to 33, comprising:

the first receiving and transmitting unit is used for acquiring the air interface condition;

the first processing unit determines a processing mode of the data packet of the service according to the first requirement information, and includes:

The first processing unit is used for determining the processing mode according to the first demand information and the air interface condition.
The apparatus of claim 34, wherein the device comprises a plurality of sensors,

the air interface condition includes at least one of: bit error rate, packet loss rate, interference period and congestion condition of the access network equipment.
The apparatus of claim 35, wherein the first unit determining the processing mode based on the first demand information and the air interface condition comprises:

when the error rate is greater than a first threshold, the first processing unit is configured to determine that the processing mode is adopted for the data packet of the service; or alternatively, the process may be performed,

when the packet loss rate is greater than a second threshold, the first processing unit is configured to determine that the processing mode is adopted for the data packet of the service; or alternatively, the process may be performed,

when the air interface is in an interference period, the first processing unit is used for determining that the processing mode is adopted for the data packet of the service; or alternatively, the process may be performed,

and when the device is in congestion, the first processing unit is used for determining that the processing mode is adopted for the data packet of the service.
The apparatus of claim 36, wherein the first unit determining the processing mode based on the first demand information and the air interface condition comprises:

When the air interface condition accords with a random packet loss model, the first processing unit is used for determining that the network coding mode is adopted for the data packet of the service; or alternatively, the process may be performed,

and when the air interface condition accords with a continuous packet loss model, the first processing unit is used for determining that the active retransmission mechanism is adopted for the data packet of the service.
The apparatus of any one of claims 31 to 37, wherein when the processing means is network coding means, the method further comprises:

the first transceiver unit is used for acquiring algorithm information of the network codes;

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

and when the device is in congestion, the first processing unit is used for reducing the downlink sending rate and increasing the downlink data cache value.
A communication device, wherein the device is a user plane functional network element, comprising:

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

The second transceiver unit is used for receiving the data packet of the service;

the second processing unit is used for determining the processing mode according to the first rule;

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

when the processing mode is an active retransmission mechanism, the second processing unit processes the data packet of the service according to the processing mode, including: the second processing unit processes the data packet of the service according to the active retransmission mechanism and the number of active retransmission times; or alternatively, the process may be performed,

when the processing mode is a network coding mode, the second processing unit processes the data packet of the service according to the processing mode, and the processing method comprises the following steps: and the second processing unit processes the data packet of the service according to the network coding mode and the algorithm information of the network coding.
The apparatus of claim 40 or 41, further comprising:

the second transceiver unit is 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 an air interface situation;

And the second processing unit is used for determining 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 condition includes at least one of: bit error rate, packet loss rate, interference period and congestion condition of access network equipment.
The apparatus of claim 43, wherein,

the first rule comprises a corresponding relation 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 comprises:

when the error rate is larger than a third threshold value, adopting the processing mode for the data packet of the service; or alternatively, the process may be performed,

when the packet loss rate is larger than a fourth threshold value, adopting the processing mode for the data packet of the service; or alternatively, the process may be performed,

when the air interface is in an interference period, adopting the processing mode for the data packet of the service; or alternatively, the process may be performed,

and when the access network equipment is in congestion, adopting the processing mode for the data packet of the service.
The apparatus of claim 45, wherein the correspondence between the air interface condition and the processing mode comprises:

When the air interface condition accords with a random packet loss model, adopting the network coding mode for the data packet of the service; or alternatively, the process may be performed,

and when the air interface condition accords with a continuous packet loss model, adopting the active retransmission mechanism for the data packet of the service.
The apparatus of any one of claims 40 to 46,

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

the data packet header of the service further includes second indication information, where the second indication information indicates that the access network device sends the data packet in a non-acknowledgement retransmission mode, or the second indication information indicates that the access network device sends the data packet in an acknowledgement retransmission mode.
The apparatus of any one of claims 40 to 48, further comprising:

And when the access network equipment is in congestion, the second processing unit is used for reducing the downlink sending rate and increasing the downlink data cache value.
A communication device, characterized in that the device is an application function network element, comprising:

the third transceiver unit is used for receiving a second air interface parameter report, and the second air interface parameter report is used for describing an air interface condition;

the third processing unit is configured to determine a processing manner of a data packet of a service according to the air interface condition, where the processing manner includes: an active retransmission mechanism and/or a network coding mode;

and the third processing unit is further used for processing the data packet of the service according to the processing mode.
The apparatus of claim 50, wherein,

the air interface condition includes at least one of: bit error rate, packet loss rate, interference period and congestion condition 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 a processing manner of the data packet of the service according to the air interface condition, including:

When the error rate is greater than a fifth threshold, the third processing unit is configured to determine that the processing mode is adopted for the data packet of the service; or alternatively, the process may be performed,

when the packet loss rate is greater than a sixth threshold, the third processing unit is configured to apply the processing manner to the data packet of the service; or alternatively, the process may be performed,

when the air interface is in an interference period, the third processing unit is used for adopting the processing mode for the data packet of the service; or alternatively, the process may be performed,

and when the access network equipment is in congestion, the third processing unit is used for adopting the processing mode for the data packet of the service.
The apparatus of claim 53, wherein the third unit determining a processing manner of the data packet of the service according to the air interface condition comprises:

when the air interface condition accords with a random packet loss model, the third unit is used for determining that the network coding mode is adopted for the data packet of the service; or alternatively, the process may be performed,

and when the air interface condition accords with a continuous packet loss model, the third unit is used for determining that the active retransmission mechanism is adopted for the data packet of the service.
The apparatus of any one of claims 50 to 54,

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

the data packet header of the service further includes fourth indication information, where the fourth indication information indicates that the access network device sends the data packet in a non-acknowledgement retransmission mode, or the fourth indication information indicates that the access network device sends the data packet in a acknowledgement retransmission mode.
A communication device, characterized in that the device is a session management function network element, comprising:

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

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

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

and the first information is used for indicating the access network equipment to report the air interface parameter to the user plane functional network element or the session management functional network element when the error rate is greater than or equal to a seventh threshold value, or the packet loss rate is greater than or equal to an eighth threshold value, or an interference period is entered.
The apparatus as recited in 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 a non-acknowledgement retransmission manner.
A communication system, 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, where the first rule indicates a processing manner of a data packet of a service, and the processing manner includes: an active retransmission mechanism and/or a network coding mode;

The user plane function network element is used for receiving the data packet of the service; determining the processing mode according to the first rule; and processing 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 used for processing the data packet of the service according to the active retransmission mechanism and the number of active retransmission times; or alternatively, the process may be performed,

and when the processing mode is a network coding mode, the user plane function network element is used for processing the data packet 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 an access network device, where the first air interface parameter report is used to describe an air interface situation; and determining the processing mode of the data packet of the service according to the air interface condition.
The system of claim 63, wherein,

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

the first rule comprises a corresponding relation between the air interface condition and the processing mode.
The system of claim 64, wherein the correspondence between the air interface condition and the processing mode comprises:

when the error rate is larger than a third threshold value, adopting the processing mode for the data packet of the service; or alternatively, the process may be performed,

when the packet loss rate is larger than a fourth threshold value, adopting the processing mode for the data packet of the service; or alternatively, the process may be performed,

when the air interface is in an interference period, adopting the processing mode for the data packet of the service; or alternatively, the process may be performed,

and when the access network equipment is in congestion, adopting the processing mode for the data packet of the service.
The system of claim 66, wherein the correspondence between the air interface condition and the processing mode includes:

when the air interface condition accords with a random packet loss model, adopting the network coding mode for the data packet of the service; or alternatively, the process may be performed,

and when the air interface condition accords with a continuous packet loss model, adopting the active retransmission mechanism for the data packet of the service.
The system of any one of claims 61 to 67,

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

the data packet header of the service further includes second indication information, where the second indication information indicates that the access network device sends the data packet in a non-acknowledgement retransmission mode, or the second indication information indicates that the access network device sends the data packet in an acknowledgement retransmission mode.
The system of any one of claims 61 to 69,

and when the access network equipment is in congestion, the user plane function network element is also used for reducing the downlink sending rate and increasing the downlink data cache value.
A communication system, comprising:

an application function network element and a session management function network element;

the application function network element is used for sending second requirement information of a service or a request for subscribing air interface parameters to the session management function network element, wherein the second requirement information is used for indicating that the service requires high reliability and low time delay;

The session management function network element is configured to send first information to an access network device according to the second requirement information or the request for subscribing to an air interface parameter, where the first information is used to instruct the access network device to report the air interface parameter to a user plane function network element or the session management function network element, the air interface parameter is used to describe an air interface condition, and the air interface condition is used to determine a processing mode of a data packet of the service, and the processing mode includes: an active retransmission mechanism and/or a network coding mode;

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 an air interface situation; determining a processing mode of a data packet of a service according to the air interface condition, wherein the processing mode comprises the following steps: an active retransmission mechanism and/or a network coding mode; and processing the data packet of the service according to the processing mode.
The system of claim 71, wherein,

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

When the error rate is greater than a fifth threshold, the application function network element is used for determining that the processing mode is adopted for the data packet of the service; or alternatively, the process may be performed,

when the packet loss rate is greater than a sixth threshold, the application function network element is configured to determine that the processing mode is adopted for the data packet of the service; or alternatively, the process may be performed,

when the air interface is in an interference period, the application function network element is used for determining that the processing mode is adopted for the data packet of the service; or alternatively, the process may be performed,

and when the access network equipment is in congestion, the application function network element is used for determining that the processing mode is adopted for the data packet of the service.
The system of claim 73, wherein,

when the air interface condition accords with a random packet loss model, the application function network element is used for determining that the network coding mode is adopted for the data packet of the service; or alternatively, the process may be performed,

and when the air interface condition accords with a continuous packet loss model, the application function network element is used for determining that the active retransmission mechanism is adopted for the data packet of the service.
The system of any one of claims 70 to 74,

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

the data packet header of the service further includes fourth indication information, where the fourth indication information indicates that the access network device sends the data packet in a non-acknowledgement retransmission mode, or the fourth indication information indicates that the access network device sends the data packet in a acknowledgement retransmission mode.
The system of claim 76, wherein,

and the first information is used for indicating the access network equipment to report the air interface parameter to the user plane functional network element or the session management functional network element when the error rate is greater than or equal to a seventh threshold value, or the packet loss rate is greater than or equal to an eighth threshold value, or an interference period is entered.
A communications apparatus comprising a processor coupled to a memory for storing a computer program or instructions, the processor for executing the computer program or instructions in the memory such that

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

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

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

The method of any one of claims 27 to 30 being performed.
A computer-readable storage medium, characterized in that a computer program or instructions for implementing the computer program or instructions are stored

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.