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Reduction of packet header compression overhead due to high ecn rate

An ECN-CE, header technology, applied in the field of packet header compression overhead, can solve problems such as reducing the number of sessions, delay jitter, affecting service quality, etc., and achieve the effect of reducing ROHC overhead

Inactive Publication Date: 2014-07-30
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This causes packet loss and / or delay jitter which affects quality of service
On the other hand, if the RAN does allocate some headroom for additional ROHC overhead, this reduces the number of sessions that can be allowed in the cell, and thus reduces capacity

Method used

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  • Reduction of packet header compression overhead due to high ecn rate
  • Reduction of packet header compression overhead due to high ecn rate
  • Reduction of packet header compression overhead due to high ecn rate

Examples

Experimental program
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example 1

[0104] If the purpose is only to "group" the ECN-CE markings, the criterion could eg be to remove the ECN-CE markings and increment the ACC_ECN until a certain threshold is reached. This method, although simple, will cause occasional ECN-CE marks to be delayed, possibly for a considerable period of time.

example 2

[0106] If the goal is instead to achieve "grouping" of ECN-CE marks while also allowing individual (occasional) ECN-CE marks to pass through, the escape criterion would need to have two components, e.g.:

[0107] 1. One component is to set the escape criterion to "true" when enough ECN-CE markers have been buffered, ie when ACC_ECN has reached a certain threshold.

[0108] 2. One component is to set the escape criterion to "true" in case there are not enough ECN-CE markers in the incoming IP packet, for example:

[0109] a. When only one of the most recent M (for example, 10) packets is marked with ECN-CE; or

[0110] b. When the proportion of packets marked with ECN-CE is too low, ie below a predetermined threshold (eg 10%).

[0111] Using this escape criterion, a single ECN-CE marker will be delayed in time, but only for a short period of time, eg from packet N to N+10. However, if the packet rate is fairly high, eg for speech which typically uses 50 packets / second, then t...

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Abstract

An ECN flow controller (22) reduces packet header compression overhead due to high ECN rate. It includes an ECN filter (24) configured to redistribute, with at least approximately maintained ECN rate, ECN-CE marks among headers to reduce switching between ECN-CE marked and ECT marked headers.

Description

technical field [0001] The present technique involves reducing packet header compression overhead due to high ECN (Explicit Congestion Notification) ratios. Background technique [0002] header compression [0003] Header compression is used to compress IP (Internet Protocol) headers and optionally also TCP (Transmission Control Protocol), UDP (User Datagram Protocol) and RTP (Real-time Transport Protocol) headers for transmission over wireless links method. [0004] Compression efficiency when using header compression is based on the assumption that, for example, many fields in the IP header contain information that is static, changes infrequently, or is predictable throughout a session. For header fields that do not change or rarely change during a session, it is common to first send the information and then store the information using state in the transmitter and receiver respectively. Thus, such static or infrequently changing information can be reconstructed at the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/06H04W28/02H04L29/06H04L29/08H04L47/33H04L47/38H04L69/04H04L69/22H04L69/24
CPCH04L47/33H04L69/22H04L69/24H04L69/04H04L47/38
Inventor 英格玛·约翰森托马斯·弗兰吉拉
Owner TELEFON AB LM ERICSSON (PUBL)