Cisco Cisco ASR 5000 Technical Manual
Each Access Point Name access, by a User Equipment, is associated with the following QoS
parameter:
parameter:
Per APN Aggregate Maximum Bit Rate (APN-AMBR): It limits the aggregate bit rate that can be
expected to be provided across all Non GBR bearers of all Packet Data Network (PDN)
connections of the same APN. The PGW enforces the APN AMBR in downlink. Enforcement of
APN AMBR in uplink is done in the UE and additionally in the PGW.
expected to be provided across all Non GBR bearers of all Packet Data Network (PDN)
connections of the same APN. The PGW enforces the APN AMBR in downlink. Enforcement of
APN AMBR in uplink is done in the UE and additionally in the PGW.
Each UE is associated with the following bearer aggregate level QoS parameter:
Per UE Aggregate Maximum Bit Rate (UE-AMBR): The MME shall set the UE-AMBR to the sum
of the APN-AMBR of all active APN’s up to the value of the subscribed UE-AMBR. The UE-AMBR
limits the aggregate bit rate that can be expected to be provided across all Non-GBR bearers of a
UE (e.g. excess traffic may get discarded by a rate shaping function). The 4G enforces the UE
AMBR in uplink and downlink.
of the APN-AMBR of all active APN’s up to the value of the subscribed UE-AMBR. The UE-AMBR
limits the aggregate bit rate that can be expected to be provided across all Non-GBR bearers of a
UE (e.g. excess traffic may get discarded by a rate shaping function). The 4G enforces the UE
AMBR in uplink and downlink.
The GBR and MBR denote bit rates of traffic per bearer, while UE-AMBR/APN-AMBR denotes bit
rates of traffic per group of bearers. The GBR and MBR denote bit rates of traffic per bearer, while
UE-AMBR/APN-AMBR denotes bit rates of traffic per group of bearers. Each of those QoS
parameters has an uplink and a downlink component.
rates of traffic per group of bearers. The GBR and MBR denote bit rates of traffic per bearer, while
UE-AMBR/APN-AMBR denotes bit rates of traffic per group of bearers. Each of those QoS
parameters has an uplink and a downlink component.
For GBR bearers, Bearer QOS Information Element(IE) (in Create/Update Bearer Request
message) carries both bearer level GBR and MBR data rate (as per Technical Specification(TS)
23.401, sec 4.7.3), but Flow QOS IE in Bearer Resource Command (BRC) procedure can carry
only GBR data rate (as per TS 23.401, sec 5.4.5). Each PCC-rule associated with GBR bearers
will have a PCC-rule level GBR and MBR data rate of its own. Bearer level MBR and GBR data
rates for an EPS bearer are derived by adding up corresponding MBR and GBR data rates of the
PCC-rules associated with that EPS bearer.
message) carries both bearer level GBR and MBR data rate (as per Technical Specification(TS)
23.401, sec 4.7.3), but Flow QOS IE in Bearer Resource Command (BRC) procedure can carry
only GBR data rate (as per TS 23.401, sec 5.4.5). Each PCC-rule associated with GBR bearers
will have a PCC-rule level GBR and MBR data rate of its own. Bearer level MBR and GBR data
rates for an EPS bearer are derived by adding up corresponding MBR and GBR data rates of the
PCC-rules associated with that EPS bearer.
For Non-GBR bearers, GBR data rate is not applicable, Bearer QOS IE always carries MBR data
rate as zero (as per TS 23.401, sec 4.7.3), and even Flow QOS IE in BRC procedure have MBR
data rate as zero (as per TS 23.401, sec 5.4.5). For Non-GBR bearers APN-AMBR data rate can
be shared by multiple bearers, there is no separate per bearer MBR data rate as such. Each PCC-
rule associated with Non-GBR bearers will have a PCC-rule level MBR data rate of its own.
rate as zero (as per TS 23.401, sec 4.7.3), and even Flow QOS IE in BRC procedure have MBR
data rate as zero (as per TS 23.401, sec 5.4.5). For Non-GBR bearers APN-AMBR data rate can
be shared by multiple bearers, there is no separate per bearer MBR data rate as such. Each PCC-
rule associated with Non-GBR bearers will have a PCC-rule level MBR data rate of its own.
Basic QoS Feature Support
APN-AMBR data rate enforcement support.
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Default-Bearer QOS enforcement support.
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Service Data Flow(SDF) (PCC-rule) Level data rate enforcement support.
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Differentiated services code point(DSCP) marking support.
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Bearer Binding support.
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APN-AMBR enforcement support
The APN AMBR is a subscription parameter stored per APN in the Home Subscriber Server(HSS).
Mobility Management Entity(MME)/ Serving Gateway(SGW) provides APN-AMBR during default
bearer establishment/GnGp handoff/HSS-Initiated QOS modification procedure. This APN-AMBR
is then authorized with PCRF. PGW then finally enforces the PCRF authorized APN-AMBR data
rate. APN-AMBR limits the aggregate bit rate that can be expected to be provided across all Non
GBR bearers of all PDN connections of the same APN. Each of those Non GBR bearers could
Mobility Management Entity(MME)/ Serving Gateway(SGW) provides APN-AMBR during default
bearer establishment/GnGp handoff/HSS-Initiated QOS modification procedure. This APN-AMBR
is then authorized with PCRF. PGW then finally enforces the PCRF authorized APN-AMBR data
rate. APN-AMBR limits the aggregate bit rate that can be expected to be provided across all Non
GBR bearers of all PDN connections of the same APN. Each of those Non GBR bearers could