DL - 4G Americas

Indication of
Congestion in
the Receive
Direction
IP
Sender Requests Marking
of Media Flow’s IP Packets
with
ECN-Capable (‘01’ or ‘10’)
SIP Session Negotiated with Full Set of Codec Rates
Independent of Network Level Congestion.
RTCP/RTP Sender and Receiver have Negotiated the Use of ECN.
Receiver
MS
Set ECN at
Early Congestion
eNB
RTCP
3GPP Bearer Level (A Side)
Figure B.11. Proposed Solution (High Level) – Downlink Direction.
Figure B.12. Proposed Solution (High Level) – Uplink Direction.
B.3 OTHER RELEASE 9 ENHANCEMENTS
Application / Codec Level
EPC
End-to-End Approach based on IP (Downlink Direction)
If DL Congestion then eNB Marks
IP Packets with
ECN-Congestion-Experienced (‘11’)
IP
Sender
MS
Set ECN at
Early Congestion
eNB
RTCP
3GPP Bearer Level (A Side)
Application / Codec Level
EPC
Sender
SIP Session Negotiated with Full Set of Codec Rates
Independent of Network Level Congestion.
RTCP/RTP Sender and Receiver have Negotiated the Use of ECN.
End-to-End Approach based on IP (Uplink Direction)
IP Packets Marked with
ECN-Capable (‘01’ or ‘10’)
B.3.1 ARCHITECTURE ASPECTS FOR HOME NODEB/ENODEB
Control Codec Rate
used by Sender
Sender Requests Marking
of Media Flow’s IP Packets
with
ECN-Capable (‘01’ or ‘10’)
IP Packets Marked with
ECN-Capable (‘01’ or ‘10’)
Receiver
If UL Congestion then eNB Marks
IP Packets with
ECN-Congestion-Experienced (‘11’)
Control Codec Rate
used by Sender
Indication of
Congestion in
the Receive
Direction
In order to provide improved indoor UMTS-HSPA-LTE coverage, 3GPP has been defining architectures
to support femtocell solutions providing indoor services for both residential and enterprise deployments.
For UMTS-HSPA the solutions are called Home NodeB solutions and for LTE they are called Home
www.4gamericas.org February 2011 Page 138