Dynamic compression coverage

Patent metadata

Field	Value
Publication number	US-2016309363-A1
Application number	US-201415032118-A
Country	US
Kind code	A1
Filing date	Mar 4, 2014
Priority date	Oct 29, 2013
Publication date	Oct 20, 2016
Grant date	—

Abstract

Methods and apparatus are provided for use in compressing packet traffic associated with a user equipment in a network. The compression ratio is estimated/calculated for a packet in the packet traffic based on a compression length for compressing the packet. The estimated/calculated compression ratio is compared with a target compression ratio. The compression length is adjusted when the estimated compression ratio has not reached at least the target compression ratio. The adjusted compression ratio is used as the compression length for compressing the packet traffic.

First claim

1 . A method for compressing packet traffic associated with a user equipment in a network, the method comprising:
estimating a compression ratio for a packet in the packet traffic based on a compression length for compressing the packet; comparing the estimated compression ratio with a target compression ratio; adjusting the compression length when the estimated compression ratio has not reached at least the target compression ratio; and using the adjusted compression length as the compression length for compressing the packet traffic.

2 . The method as claimed in claim 1 , wherein the estimating, comparing and adjusting the compression length are repeated for the packet until the estimated compression ratio reaches at least the target compression ratio.

3 . The method as claimed in claim 2 , wherein the estimating, comparing and adjusting the compression length are repeated for another one or more packet(s) in the packet traffic until the estimated compression ratio reaches at least the target compression ratio.

4 . The method as claimed in claim 3 , wherein the another one or more packet(s) of the packet traffic are at least one of:
a) another one or more consecutive packet(s) within the packet traffic; and b) another one or more packet(s) spaced apart within the packet traffic.

5 . The method as claimed in claim 1 , wherein the estimating, comparing and adjusting the compression length are repeated a fixed number of times.

6 . The method as claimed in claim 1 , wherein the estimating, comparing and adjusting the compression length are repeated based on at least one of:
a) the estimated compression ratio reaching at least the target compression ratio; b) the estimated compression ratio being substantially the same as one or more previous estimated compression ratio(s); and c) the change in compression gain from a previous iteration of the estimating, comparing and adjusting is less than a compression gain threshold value.

7 . The method as claimed in claim 1 , wherein the estimating, comparing and adjusting the compression length are repeated at periodic intervals.

8 . The method as claimed in claim 1 , further comprising:
determining whether to adjust the compression length based on one or more of the current compression length, the target compression ratio, any previous compression lengths, and any previous estimated compression ratios.

9 . The method as claimed in claim 1 , wherein adjusting the compression length comprises determining whether to increase or decrease the compression length as a function of one or more of the current compression length, the current target compression ratio, any previous compression length(s), any previous estimated compression ratios, headers of the packet, payload data of the packet, headers of the packet traffic, and payload of at least a portion of the packet traffic.

10 . The method as claimed in claim 1 , wherein the compression length is adjusted by a compression length step size.

11 . The method as claimed in claim 10 , further comprising:
adjusting the compression length step size to increase the likelihood the estimated compression ratio reaches at least the target compression ratio.

12 . The method as claimed in claim 10 , further comprising:
determining the compression length step size for adjusting the compression length as a function of one or more of any previous compression length(s), the estimated compression ratio, the target compression ratio, any previous estimated compression ratio(s), headers and/or payload data of the packet, headers and/or payload data of at least a portion of the packet traffic.

13 . The method as claimed in claim 1 , wherein the packet is an uncompressed packet and estimating the compression ratio comprises compressing the packet based on the compression length.

14 . The method as claimed in any of claim 1 , wherein the packet is a compressed packet and estimating the compression ratio comprises decompressing the packet based on the compression length; and
using the compression length further comprises transmitting the compression length based on the adjusted compression length to a compressor that compressed the packet for use in compressing further packets in the packet traffic.

15 . An apparatus for use when compressing packet traffic associated with a user equipment, the apparatus comprising:
a processor; a memory containing instructions that, when executed by the processor, cause the apparatus to:
estimate a compression ratio for a packet in the packet traffic based on a compression length for compressing the packet;
compare the estimated compression ratio with a target compression ratio;
adjust the compression length when the estimated compression ratio has not reached at least the target compression ratio; and
use the adjusted compression length as the compression length for compressing the packet traffic.

16 . The apparatus as claimed in claim 15 , wherein the instructions further cause the apparatus to repeat the estimation, comparison and adjustment of the compression length for the packet until the estimated compression ratio reaches at least the target compression ratio.

17 . The apparatus as claimed in claim 15 , wherein the instructions further cause the apparatus to repeat the estimation, comparison and adjustment of the compression length for another one or more packets in the packet traffic until the estimated compression ratio reaches at least the target compression ratio.

18 . The apparatus as claimed in claim 17 , wherein the another one or more packets of the packet traffic comprises at least one of:
a) another one or more consecutive packet(s) within the packet traffic; and b) another one or more packet(s) spaced apart within the packet traffic.

19 . The apparatus as claimed in claim 15 , wherein the instructions further cause the apparatus to repeat the estimation, comparison and adjustment of the compression length a fixed number of times.

20 . Theapparatus as claimed in claim 15 , wherein the instructions further cause the apparatus to repeat the estimation, comparison and adjustment of the compression length is based on at least one of:
a) the estimated compression ratio reaching at least the target compression ratio; b) the estimated compression ratio being substantially the same as one or more previous estimated compression ratio(s); c) the change in compression gain from a previous iteration of the estimation, comparison and adjustment being less than a compression gain threshold value.

21 . The apparatus as claimed in claim 15 , wherein the instructions further cause the apparatus to repeat the estimation, comparison and adjustment of the compression length at periodic intervals.

22 . The apparatus as claimed in claim 15 , wherein the instructions further cause the apparatus to determine whether to adjust the compression length based on one or more of the current compression length, the target compression ratio, any previous compression lengths, and any previous estimated compression ratios.

23 . The apparatus as claimed in claim 15 , wherein the instructions further cause the apparatus to adjust the compression length by determining whether to increase or decrease the compression length as a function of one or more of the current compression length, the current target compression length, any previous compression length(s), any previous estimated compression ratios, headers of the packet

Assignees

• Ericsson Telefon Ab L M

Inventors

• Persson Fredrik
• Lundborg Tomas

Classifications

• H04L69/22

  Parsing or analysis of headers · CPC title

• H04L69/04

  Protocols for data compression, e.g. ROHC · CPC title

• H04L47/38

  by adapting coding or compression rate · CPC title

• H04W28/06 Primary

  Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} · CPC title