Maximum transmission unit size selection for wireless data transfer

• US 10,567,297 B2
• Filed: 03/29/2018
• Issued: 02/18/2020
• Est. Priority Date: 03/29/2018
• Status: Active Grant

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.), AT&T Mobility II LLC (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Zhang, Ming, Zhou, Jianchun, Sangal, Sameer
• Primary Examiner(s): Yuen, Kan
• Application Number:
  US15/939,892
• Publication Number:
  US 20190306072A1
• Time in Patent Office: 691 Days
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04L 47/36 by determining packet size, e.g. maximum transfer unit [MTU]
• CPC Class Codes: H04L 47/365 Dynamic adaptation of the packet size
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/0236 radio quality, e.g. interference, losses or delay
• CPC Class Codes: H04W 40/244 using a network of reference devices, e.g. beaconing

Abstract

The described technology is generally directed towards selecting, by user equipment, a selected maximum transmission unit (MTU) packet size for wireless data transfer based on radio signal conditions. In one aspect, reference signal received power (RSRP) and reference signal received quality (RSRQ) are used to select the MTU packet size, e.g., by using RSRP and RSRQ as indices to a lookup table of predetermined MTU packet sizes, such as previously determined by field testing. In general, smaller MTU packet sizes are used with poorer quality radio signal conditions. The selected MTU packet size may be increased or decreased based on actual performance data and/or based on changed radio signal conditions, such as for a subsequent data transfer session. The user equipment may comprise a Cat-M device that transfers data related to Machine-Type Communications (MTC)/Machine to Machine (M2M) communications.

Claims

1. A method, comprising:

obtaining, by a user equipment comprising a processor, radio signal condition data representative of a condition of a radio signal;

determining, by the user equipment, an initial maximum transmission unit packet size based on the radio signal condition data, wherein the determining the initial maximum transmission unit packet size comprises using reference signal received power data and reference signal received quality data associated with the radio signal condition data to retrieve the initial maximum transmission unit packet size from a data store of predetermined initial maximum transmission unit packet sizes, and wherein the data store of predetermined initial maximum transmission unit packet sizes is populated based on selecting initial maximum transmission unit packet sizes for inclusion in the data store based on determining transmission control protocol IP packet retransmission rates and determining transmission control protocol session time out rates at a cell edge, as a function of respective received powers and respective received qualities, for respective reference signals of a group of candidate initial maximum transmission unit packet sizes; and

using, by the user equipment, the initial maximum transmission unit packet size as a selected maximum transmission unit packet size to transfer data between the user equipment and a network device.

2. The method of claim 1, wherein the obtaining the radio signal condition data comprises measuring the reference signal received power data corresponding to a power of a reference signal and determining the reference signal received quality data corresponding to a received quality of the reference signal.

3. The method of claim 1, further comprising determining, by the user equipment, that a negative acknowledgement count applicable to packet transmissions is below a threshold value, and in response to the determining that the negative acknowledgement count is below the threshold value, increasing the selected maximum transmission unit packet size to an increased maximum transmission unit packet size, and using the increased maximum transmission unit packet size to transfer data between the user equipment and the network device in a subsequent data transfer session.

4. The method of claim 1, further comprising determining, by the user equipment, that a negative acknowledgement count applicable to packet transmissions is above a threshold value, and in response to the determining that the negative acknowledgement count is above the threshold value, decreasing the selected maximum transmission unit packet size to a decreased maximum transmission unit packet size, and using the decreased maximum transmission unit packet size to transfer data between the user equipment and the network device in a subsequent data transfer session.

5. The method of claim 1, wherein the using the selected maximum transmission unit packet size to transfer the data between the user equipment and the network device comprises using the selected maximum transmission unit packet size to transfer the data between a category-M device and the network device.

6. The method of claim 1, wherein the user equipment comprises a category-M device.

7. A radio user equipment device, comprising:

a processor; and

a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, the operations comprising;

measuring radio signal condition data representative of a condition of a radio signal;

selecting an initial maximum transmission unit packet size based on the radio signal condition data as a selected maximum transmission unit packet size, wherein the selecting the initial maximum transmission unit packet size comprises using reference signal received power data and reference signal received quality data associated with the radio signal condition data to retrieve the initial maximum transmission unit packet size from a data store of predetermined initial maximum transmission unit packet sizes, and wherein the data store of predetermined initial maximum transmission unit packet sizes is populated based on selecting initial maximum transmission unit packet sizes for inclusion in the data store based on determining transmission control protocol IP packet retransmission rates and determining transmission control protocol session time out rates at a cell edge, as a function of respective received powers and respective received qualities, for respective reference signals of a group of candidate initial maximum transmission unit packet sizes; and

transferring data between the radio user equipment device and a network device based on the selected maximum transmission unit packet size.

8. The radio user equipment device of claim 7, wherein the measuring the radio signal condition data comprises measuring the reference signal received power data corresponding to a power of a reference signal and determining the reference signal received quality data corresponding to a received quality of the reference signal.

9. The radio user equipment device of claim 7, further comprising, changing the selected maximum transmission unit packet size for a subsequent data transfer session based on actual performance measurement data with respect to transferring the data in a current data transfer session.

10. The radio user equipment device of claim 9, wherein the changing the selected maximum transmission unit packet size based on the actual performance measurement data comprises tracking negative acknowledgments received with respect to transferring the data.

11. The radio user equipment device of claim 9, wherein the changing the selected maximum transmission unit packet size based on the actual performance measurement data comprises increasing the selected maximum transmission unit packet size.

12. The radio user equipment device of claim 9, wherein the changing the selected maximum transmission unit packet size based on the actual performance measurement data comprises decreasing the selected maximum transmission unit packet size.

13. The radio user equipment device of claim 9, wherein the radio user equipment device comprises a category-M device.

14. A non-transitory machine-readable storage medium, comprising executable instructions that, when executed by a processor of a user equipment, facilitate performance of operations, the operations comprising:

selecting a selected maximum transmission unit packet size from a data store of predetermined maximum transmission unit packet sizes based on a reference signal received power and a reference signal received quality, wherein the data store of predetermined maximum transmission unit packet sizes is populated based on selecting maximum transmission unit packet sizes for inclusion in the data store based on determining transmission control protocol IP packet retransmission rates and determining transmission control protocol session time out rates at a cell edge, as a function of respective received powers and respective received qualities, for respective reference signals of a group of candidate maximum transmission unit packet sizes; and

using the selected maximum transmission unit packet size, transferring data between the user equipment and a network device.

15. The non-transitory machine-readable storage medium of claim 14, wherein the operations further comprise determining the reference signal received power and determining the reference signal received quality at the user equipment.

16. The non-transitory machine-readable storage medium of claim 14, wherein the operations further comprise changing the selected maximum transmission unit packet size to a changed maximum transmission unit packet size for a subsequent data transfer session based on actual performance measurement data with respect to transferring the data in a current data transfer session.

17. The non-transitory machine-readable storage medium of claim 16, wherein the changing the selected maximum transmission unit packet size comprises increasing the selected maximum transmission unit packet size.

18. The non-transitory machine-readable storage medium of claim 16, wherein the changing the selected maximum transmission unit packet size comprises decreasing the selected maximum transmission unit packet size.

19. The non-transitory machine-readable storage medium of claim 16, wherein the changing the selected maximum transmission unit packet size based on the actual performance measurement data comprises tracking negative acknowledgments received with respect to transferring the data.

20. The non-transitory machine-readable storage medium of claim 14, wherein the transferring the data between the user equipment and the network device comprises using the selected maximum transmission unit packet size to transfer the data between a category-M device and the network device.