An improvement on ip fragmentation in gtp tunnel

A technology of IP fragmentation and tunneling, applied in the direction of network traffic/resource management, electrical components, connection management, etc., can solve problems such as occurrence, and achieve the effect of improving performance

Active Publication Date: 2013-08-21
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, as suggested in the change request, IP fragmentation still occurs if the packet size exceeds the MTU

Method used

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  • An improvement on ip fragmentation in gtp tunnel
  • An improvement on ip fragmentation in gtp tunnel
  • An improvement on ip fragmentation in gtp tunnel

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Embodiment Construction

[0025] The invention relates to a method for improving IP fragmentation and transmission of user payloads between a user equipment UE and a peer node PN. The payload is transmitted via at least the transmission path realized by the established first and second tunnels connecting the first and second nodes in the packet core network PCN. Those skilled in the art will know that the first node and the PCN suitable for performing the method described below are also disclosed below. The PCN will not be described in more detail in the present invention.

[0026] figure 1 An example of IP packets passed through a GTP tunnel is shown. The PCN includes UE 10 , eNodeB 11 , Serving Gateway (S-GW) 12 and PDN Gateway (P-GW) 13 . In the following, the first node will be exemplified by eNodeB and the second node by P-GW.

[0027] As shown, a data packet 15 is transmitted through a path formed by a first tunnel 17 extending between the eNodeB and the S-GW and a second tunnel 18 extending ...

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Abstract

The present invention relates to a method for improving IP fragmentation and transmission of user payload between a User Equipment, UE (10), and a Peer Node, PN (14). The payload is transmitted through a transmission path enabled by at least a first (17, 18) and a second (17, 18) established tunnel, said tunnels connecting a first (11), (13) and a second (11, 13) node in a Packet Core Network, PCN. The method comprises the steps of: - The first node (11,13) fragments (19) at least one received payload packet (15) into fragments (16) on the basis of a minimum Maximum Transmission Unit, MTU, for an upper IP layer of the transmission path. The first node (11, 13) encapsulates (20) said fragments at the entry of the first tunnel (17, 18). What particularly characterizes the method is that it further comprises a step where the first node (11, 13) determines (21) the MTU for the upper IP layer of the transmission path on the basis of an MTU of a lower IP layer of the transmission path and on the basis of the size of at least one additional tunnel header for the encapsulated fragments (16).

Description

technical field [0001] The invention relates to a method for improving IP fragmentation and transmission of user payloads between a user equipment UE and a peer node PN. The invention also relates to a first node and a packet core network suitable for the same purpose. Background technique [0002] In the packet core network PCN, the transmitted user payload will be encapsulated and decapsulated by adding and removing the GPRS tunnel transfer protocol GTP header. Two subsequent GTP tunnels between the eNodeB and the serving gateway S-GW and between the S-GW and the PDN gateway P-GW need to be established in order to successfully communicate between the user equipment UE and the packet data network PDN Packets are delivered while the S-GW acts as an intermediary between the two tunnels. [0003] When the IP packet of the user payload is large enough, the size of the final IP packet after encapsulation may exceed the allowable value. An example of an allowable value is a Ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/06H04W76/02H04W80/04H04L45/74H04L47/36
CPCH04W28/06H04W80/04H04L47/36H04W76/12H04L45/74
Inventor 顾维郭雷李晓刘棣孙利荣夏琪
Owner TELEFON AB LM ERICSSON (PUBL)
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