11 EP3499820B1 12 ured to send the second acknowledgement packet one or more programs include a computer execution in- marked by the determining module to the first device. struction.When a processor of the device executes the [0055]For technical effects of the sixth aspect or any computer execution instruction,the device performs the optional implementation of the sixth aspect,refer to re- congestion control method according to the third aspect. lated descriptions of technical effects of the third aspect 5 [0064]For technical effects of the eleventh aspect and or any optional implementation of the third aspect.Details the twelfth aspect.refer to related descriptions of tech- are not described herein again. nical effects of the third aspect or any optional implemen- [0056]According to a seventh aspect,a device is pro- tation of the third aspect.Details are not described herein vided.The device includes a processor,a transceiver again. and a memory.The memory is configured to store a com- 10 [0065]According to a thirteenth aspect,a communica puter execution instruction.When the device runs,the tions system is provided.The communications system processor executes the computer execution instruction includes the device (namely,the first device in this ap- stored in the memory,so that the device performs the plication)according to the fourth aspect or any optional congestion control method according to the first aspect. implementation of the fourth aspect,the routing device [0057]According to an eighth aspect,a computer- 15 according to the fifth aspect or any optional implementa- readable storage medium is provided.The computer- tion of the fifth aspect,and the device (namely,the sec- readable storage medium stores one or more programs. ond device in this application)according to the sixth as- The one or more programs include a computer execution pect or any optional implementation of the sixth aspect. instruction.When a processor of a device executes the Data transmission is performed between the first device computer execution instruction,the device performs the 20 and the second device by using the routing device. congestion control method according to the first aspect [0066]Altematively,the communications system in- or any optional manner of the first aspect. cludes the device(namely,the first device in this appli- [0058]For technical effects of the seventh aspect and cation)according to the seventh aspect,the routing de- the eighth aspect,refer to related descriptions of techni- vice according to the ninth aspect,and the device(name- cal effects of the first aspect or any optional implemen- 25 ly,the second device in this application)according to the tation of the first aspect.Details are not described herein eleventh aspect.Data transmission is performed be- again. tween the first device and the second device by using [0059]According to a ninth aspect,a routing device is the routing device. provided.The routing device includes a processor,a [0067]For technical effects of the thirteenth aspect. transceiver,and a memory.The memory is configured 30 refer to related descriptions of technical effects of the to store a computer execution instruction.When the rout- fourth aspect or any optional implementation of the fourth ing device runs,the processor executes the computer aspect,the fifth aspect or any optional implementation execution instruction stored in the memory,so that the of the fifth aspect,the sixth aspect or any optional imple- routing device performs the congestion control method mentation of the sixth aspect,the seventh aspect,the according to the second aspect. 35 ninth aspect,and the eleventh aspect.Details are not [0060]According to a tenth aspect,a computer-read- described herein again. able storage medium is provided.The computer-reada- ble storage medium stores one or more programs.The BRIEF DESCRIPTION OF DRAWINGS one or more programs include a computer execution in- struction.When a processor of the routing device exe- 40 [0068]To describe the technical solutions in the em cutes the computer execution instruction,the device per- bodiments of the present invention or in the prior art more forms the congestion control method according to the clearly,the following briefly describes the accompanying second aspect. drawings required for describing the embodiments or the [0061]For technical effects of the ninth aspect and the prior art.Apparently,the accompanying drawings in the tenth aspect,refer to related descriptions of technical ef- 45 following description show merely some embodiments fects ofthe second aspect or any optional implementation of the present invention. of the second aspect.Details are not described herein again. FIG.1 is a schematic architectural diagram of a com- [0062]According to an eleventh aspect,a device is munications system according to an embodiment of provided.The device includes a processor,a transceiver, 50 the present invention: and a memory.The memory is configured to store a com- FIG.2 is a schematic hardware diagram of a mobile puter execution instruction.When the device runs,the phone according to an embodiment of the present processor executes the computer execution instruction invention: stored in the memory,so that the device performs the FIG.3 is a schematic hardware diagram of a router congestion control method according to the third aspect. 55 according to an embodiment of the present inven- [0063]According to a twelfth aspect,a computer-read- tion; able storage medium is provided.The computer-reada- FIG.4 is a schematic diagram 1 of a congestion con- ble storage medium stores one or more programs.The trol method according to an embodiment of the 8EP 3 499 820 B1 8 5 10 15 20 25 30 35 40 45 50 55 ured to send the second acknowledgement packet marked by the determining module to the first device. [0055] For technical effects of the sixth aspect or any optional implementation of the sixth aspect, refer to re￾lated descriptions of technical effects of the third aspect or any optional implementation of the third aspect. Details are not described herein again. [0056] According to a seventh aspect, a device is pro￾vided. The device includes a processor, a transceiver, and a memory. The memory is configured to store a com￾puter execution instruction. When the device runs, the processor executes the computer execution instruction stored in the memory, so that the device performs the congestion control method according to the first aspect. [0057] According to an eighth aspect, a computer￾readable storage medium is provided. The computer￾readable storage medium stores one or more programs. The one or more programs include a computer execution instruction. When a processor of a device executes the computer execution instruction, the device performs the congestion control method according to the first aspect or any optional manner of the first aspect. [0058] For technical effects of the seventh aspect and the eighth aspect, refer to related descriptions of techni￾cal effects of the first aspect or any optional implemen￾tation of the first aspect. Details are not described herein again. [0059] According to a ninth aspect, a routing device is provided. The routing device includes a processor, a transceiver, and a memory. The memory is configured to store a computer execution instruction. When the rout￾ing device runs, the processor executes the computer execution instruction stored in the memory, so that the routing device performs the congestion control method according to the second aspect. [0060] According to a tenth aspect, a computer-read￾able storage medium is provided. The computer-reada￾ble storage medium stores one or more programs. The one or more programs include a computer execution in￾struction. When a processor of the routing device exe￾cutes the computer execution instruction, the device per￾forms the congestion control method according to the second aspect. [0061] For technical effects of the ninth aspect and the tenth aspect, refer to related descriptions of technical ef￾fects of the second aspect or any optional implementation of the second aspect. Details are not described herein again. [0062] According to an eleventh aspect, a device is provided. The device includes a processor, a transceiver, and a memory. The memory is configured to store a com￾puter execution instruction. When the device runs, the processor executes the computer execution instruction stored in the memory, so that the device performs the congestion control method according to the third aspect. [0063] According to a twelfth aspect, a computer-read￾able storage medium is provided. The computer-reada￾ble storage medium stores one or more programs. The one or more programs include a computer execution in￾struction. When a processor of the device executes the computer execution instruction, the device performs the congestion control method according to the third aspect. [0064] For technical effects of the eleventh aspect and the twelfth aspect, refer to related descriptions of tech￾nical effects of the third aspect or any optional implemen￾tation of the third aspect. Details are not described herein again. [0065] According to a thirteenth aspect, a communica￾tions system is provided. The communications system includes the device (namely, the first device in this ap￾plication) according to the fourth aspect or any optional implementation of the fourth aspect, the routing device according to the fifth aspect or any optional implementa￾tion of the fifth aspect, and the device (namely, the sec￾ond device in this application) according to the sixth as￾pect or any optional implementation of the sixth aspect. Data transmission is performed between the first device and the second device by using the routing device. [0066] Alternatively, the communications system in￾cludes the device (namely, the first device in this appli￾cation) according to the seventh aspect, the routing de￾vice according to the ninth aspect, and the device (name￾ly, the second device in this application) according to the eleventh aspect. Data transmission is performed be￾tween the first device and the second device by using the routing device. [0067] For technical effects of the thirteenth aspect, refer to related descriptions of technical effects of the fourth aspect or any optional implementation of the fourth aspect, the fifth aspect or any optional implementation of the fifth aspect, the sixth aspect or any optional imple￾mentation of the sixth aspect, the seventh aspect, the ninth aspect, and the eleventh aspect. Details are not described herein again. BRIEF DESCRIPTION OF DRAWINGS [0068] To describe the technical solutions in the em￾bodiments of the present invention or in the prior art more clearly, the following briefly describes the accompanying drawings required for describing the embodiments or the prior art. Apparently, the accompanying drawings in the following description show merely some embodiments of the present invention. FIG. 1 is a schematic architectural diagram of a com￾munications system according to an embodiment of the present invention; FIG. 2 is a schematic hardware diagram of a mobile phone according to an embodiment of the present invention; FIG. 3 is a schematic hardware diagram of a router according to an embodiment of the present inven￾tion; FIG. 4 is a schematic diagram 1 of a congestion con￾trol method according to an embodiment of the 11 12