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How Uplink /downlink packet looks like at PGW and eNB?

+1 vote

I am looking for uplink/downlink packet structure at PGW as well as eNB.

posted Apr 1, 2016 by Rakesh Kumar Suman

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1 Answer

+1 vote

Downlink - >At PGW, it receives plain IP packet which the complete IP header.
Based on the type of IP packet, PGW does packet filtering and place the filtered packet to the associated bearer.
Once the packet reaches at eNodeB, it removes the GTP header and does the IP header compression. The compressed IP packet sent to UE using the data radio bearers established UE and eNodeB.

Uplink -> In uplink direction, Filters present at UE side takes the responsibility to put originated IP packet into appropirate bearer and does the header compression before sending out the packet to UE. Once the packet reaches at eNodeB, it decompresses the packet and send the packet to SGW by using the associated tunnel id.

Are u looking something else ? you are fine with this description.

answer Apr 3, 2016 by Harshita
Hi Harshita,
Thanks for explanation.
I am looking at lower level structure with name.
eGTP-U protocol sits also on enodeb as well as  pgw & contais own header as well.
 Could you please tell me packet structure ( lower level with message name) at PGW for uplink /downlink.?
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