Data transmission method and device

• US 10,348,635 B2
• Filed: 12/08/2014
• Issued: 07/09/2019
• Est. Priority Date: 12/08/2014
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Kuang, Yunsheng
• Primary Examiner(s): Moore, Jr., Michael J
• Application Number:
  US15/534,388
• Publication Number:
  US 20180083884A1
• Time in Patent Office: 1,674 Days
• Field of Search: None
• CPC Class Codes: H04L 2212/00 Encapsulation of packets
• CPC Class Codes: H04L 47/24 Traffic characterised by specific attributes, e.g. priority or QoS
• CPC Class Codes: H04L 47/245 using preemption
• CPC Class Codes: H04L 47/2466 using signalling traffic
• CPC Class Codes: H04L 47/286 Time to live
• CPC Class Codes: H04L 47/30 in combination with information about buffer occupancy at either end or at transit nodes
• CPC Class Codes: H04L 47/6275 based on priority
• CPC Class Codes: H04L 49/9005 using dynamic buffer space allocation
• CPC Class Codes: H04L 67/1074 for supporting data block transmission mechanisms file transfer H04L67/06
• CPC Class Codes: H04W 28/065 using assembly or disassembly of packets
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A data transmission method and a device, where the method includes obtaining a service data packet that needs to be sent to a peer device, determining a priority corresponding to the service data packet, writing the service data packet to a packet buffer when the priority is lower than a preset level, encapsulating the data stored in the packet buffer in order to generate a to-be-sent packet when data stored in the packet buffer meets a transmission condition, and sending the to-be-sent packet to the peer device.

Claims

1. A data transmission method, comprising:

obtaining a service data packet that needs to be sent to a peer device, the service data packet being associated with a service;

determining a priority of the service data packet according to a preset priority of the service;

encapsulating the service data packet without writing the service data packet to a packet buffer when the priority of the service associated with the service data packet is higher than or equal to a preset level;

generating a to-be-sent packet from the encapsulated service data packet when the priority of the service associated with the service data packet is higher than or equal to the preset level;

writing the service data packet to the packet buffer when the priority of the service data packet is lower than the preset level;

encapsulating data stored in the packet buffer to generate the to-be-sent packet when the data stored in the packet buffer meets a transmission condition; and

sending the to-be-sent packet to the peer device.

2. The data transmission method of claim 1, wherein the transmission condition comprises either:

the data stored in the packet buffer meets or exceeds a data threshold, the data threshold being a maximum payload length of the to-be-sent packet;

or

a preset length of time has elapsed after a first service data packet is written to the packet buffer, the preset length of time being defined according to a maximum transmission latency allowed by the service data packet.

3. The data transmission method of claim 1, further comprising:

detecting whether the data is stored in the packet buffer when the priority of the service is higher than or equal to the preset level;

writing the service data packet to the packet buffer and storing the data in the packet buffer;

encapsulating the data stored in the packet buffer to generate the to-be-sent packet and storing the data in the packet buffer; and

sending the to-be-sent packet to the peer device.

4. The data transmission method of claim 1, wherein before writing the service data packet to the packet buffer, the method further comprises:

obtaining a length of the service data packet; and

determining, according to the length of the service data packet and a maximum payload length of the to-be-sent packet, whether the service data packet can be written to the packet buffer; and

writing the service data packet to the packet buffer comprises writing the service data packet to the packet buffer when the service data packet can be written to the packet buffer.

5. The data transmission method of claim 4, wherein determining whether the service data packet can be written to the packet buffer comprises:

comparing a first length of the service data packet with a second length of a data amount of an idle storage space of the packet buffer, the maximum payload length of the to-be-sent packet being greater than a maximum data buffering amount of the packet buffer;

determining that the service data packet can be written to the packet buffer when the length of the service data packet is less than or equal to a data amount of the idle storage space of the packet buffer; and

determining that the service data packet cannot be written to the packet buffer when the length of the service data packet is greater than the data amount of the idle storage space of the packet buffer.

6. The data transmission method of claim 4, wherein determining whether the service data packet can be written to the packet buffer comprises:

calculating a sum of the length of the service data packet and an amount occupied by the data stored in the packet buffer, the maximum payload length of the to-be-sent packet being less than or equal to a maximum data buffering amount of the packet buffer;

determining that the service data packet can be written to the packet buffer, the sum of the length of the service data packet being less than or equal to the maximum payload length of the to-be-sent packet; and

determining that the service data packet cannot be written to the packet buffer, the sum of the length of the service data packet being greater than the maximum payload length of the to-be-sent packet.

7. The data transmission method of claim 1, further comprising writing a preset separator at an end or a beginning of the service data packet after writing the service data packet to the packet buffer.

8. The method of claim 1, further comprising clearing the packet buffer after sending the to-be-sent packet to the peer device.

9. The data transmission method of claim 1, wherein obtaining the service data packet that is to be sent to the peer device comprises:

obtaining sensor data that needs to be sent to the peer device; and

converting the sensor data into the service data packet in a particular format, the particular format comprising a data structure that can be identified by the peer device.

10. The data transmission method of claim 1, wherein obtaining the service data packet that is to be sent to the peer device comprises:

obtaining service information that needs to be sent to the peer device; and

converting the service information into the service data packet in a particular format, the particular format comprising a data structure that can be identified by the peer device.

11. A device, comprising:

a memory comprising instructions; and

a processor coupled to the memory and configured to execute the instructions, the instructions causing the processor to be configured to;

obtain a service data packet that needs to be sent to a peer device, the service data packet being associated with a service;

determine a priority of the service data packet according to a preset priority of the service;

encapsulate the service data packet without writing the service data packet to a packet buffer when the priority of the service associated with the service data packet is higher than or equal to a preset level;

generate a to-be-sent packet from the encapsulated service data packet when the priority of the service associated with the service data packet is higher than or equal to the preset level;

write the service data packet to the packet buffer when the priority of the service data packet is lower than the preset level;

encapsulate data stored in the packet buffer in order to generate the to-be-sent packet when the data stored in the packet buffer meets a transmission condition; and

send the to-be-sent packet to the peer device.

12. The device of claim 11, wherein the transmission condition comprises either:

the data stored in the packet buffer meets or exceeds a data threshold, the data threshold being a maximum payload length of the to-be-sent packet;

or

a preset length of time has elapsed after a first service data packet is written to the packet buffer, the preset length of time being defined according to a maximum transmission latency allowed by the service data packet.

13. The device of claim 11, wherein the instructions further cause the processor to be configured to:

detect whether the data is stored in the packet buffer, the priority of the service being higher than or equal to the preset level;

write the service data packet to the packet buffer;

encapsulate the data stored in the packet buffer in order to generate the to-be-sent packet and store the data in the packet buffer; and

send the to-be-sent packet to the peer device.

14. The device of claim 11, wherein before writing the service data packet to the packet buffer, the instructions further cause the processor to be configured to:

obtain a length of the service data packet;

determine, according to the length of the service data packet and a maximum payload length of the to-be-sent packet, whether the service data packet can be written to the packet buffer; and

write the service data packet to the packet buffer when the service data packet can be written to the packet buffer.

15. The device of claim 14, wherein when determining whether the service data packet can be written to the packet buffer, the instructions further cause the processor to be configured to:

compare a first length of the service data packet with a second length of a data amount of an idle storage space of the packet buffer, the maximum payload length of the to-be-sent packet being greater than a maximum data buffering amount of the packet buffer;

determine that the service data packet can be written to the packet buffer, the length of the service data packet being less than or equal to a data amount of the idle storage space of the packet buffer; and

determine that the service data packet cannot be written to the packet buffer, the length of the service data packet being greater than the data amount of the idle storage space of the packet buffer.

16. The device of claim 14, wherein when determining whether the service data packet can be written to the packet buffer, the instructions further cause the processor to be configured to:

calculate a sum of the length of the service data packet and an amount occupied by the data stored in the packet buffer, the maximum payload length of the to-be-sent packet being less than or equal to a maximum data buffering amount of the packet buffer;

determine that the service data packet can be written to the packet buffer, the sum of the length of the service data packet being less than or equal to the maximum payload length of the to-be-sent packet; and

determine that the service data packet cannot be written to the packet buffer, the sum of the length of the service data packet being greater than the maximum payload length of the to-be-sent packet.

17. The device of claim 11, wherein the instructions further cause the processor to be configured to write a preset separator at an end or a beginning of the service data packet after writing the service data packet to the packet buffer.

18. The device of claim 11, wherein the instructions further cause the processor to be configured to clear the packet buffer after sending the to-be-sent packet to the peer device.

19. The device of claim 11, further comprising a sensor coupled to the processor, and when obtaining the service data packet that is to be sent to the peer device, the instructions further cause the processor to be configured to:

obtain, using the sensor, sensor data that is to be sent to the peer device; and

convert the sensor data into the service data packet in a particular format, the particular format comprising a data structure that can be identified by the peer device.

20. The device of claim 11, wherein when obtaining the service data packet that is to be sent to the peer device, the instructions further cause the processor to be configured to:

obtain service information that needs to be sent to the peer device; and

convert the service information into the service data packet in a particular format, the particular format comprising a data structure that can be identified by the peer device.