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LTE: Can a dedicated bearer contain more than one rating group ?

+1 vote
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  • As per Policy Control and Charging, we can have multiple rules i.e. rule-group mapped to one pcc-action.
  • One pcc-action should have a specific rating-group Id and service-Id and Qos.
  • Since, a dedicated bearer has a fixed Qos, we can say that dedicated bearer is associated with only one pcc-action.
  • According to Gx Spec 29.212, when Rule-Definition is received from PCRF, it comes with rating-group-id, Qos, and Flow-Information to create a dedicated bearer.

So, is it possible that PCRF can send two different rules say RD1 and RD2 with same Qos but different rating-group-id. I dont see this thing mentioned anywhere in 29.212.

Please help with reference to spec...

posted Jul 27, 2015 by anonymous

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1 Answer

+1 vote

Since, a dedicated bearer has a fixed Qos, we can say that dedicated bearer is associated with only one pcc-action

A dedicated bearer can have multiple rules or let's just say multiple SDF. Each SDF(kind of service) can have its own QoS which in-turn will contribute to bearer QoS. Each SDF can have its own Rating-Group.

So, basically a dedicated bearer can have multiple Rating-Group as in LTE flow based charging happens.
Based on the number of Rating-Group that are mapped to a bearer, the CCR towards OCS will have that many MSCC AVPs on Gy interface.

answer Jul 28, 2015 by Peeyush Sharma
Similar Questions
+1 vote

As of now the basic setup for the dedicated bearer works ok (with and without Diameter interface)

As of now, for this initial work, I am trying to see if this can be extended now..Now PCRF just accepts the QCI requested.

Lets say we want to create a new dedicated bearer, then PCRF gets a request saying it needs to create a ded bearer with QOS( QCI=3, Max GBR Ul =10Mbps, MaxGBR Dl=10Mbps, GBR Ul = 5Mbps, GBR Dl=5Mbps.
Lets say this user is assigned, MaxGBRUl =5, MaxGBR Dl=5Mbps, GBR Ul = 2.5Mbps, GBR Dl=2.5Mbps.

What should pcrf do this case ? Allow to create the ded bearer with MaxGBRUl =5, MaxGBR Dl=5Mbps, GBR Ul = 2.5Mbps, GBR Dl=2.5Mbps. ? Or decline to create it ?

Your inputs much appreciated...

+3 votes

Lets say we have a session-0 established for the UE (IPaddress1) for the default bearer. This is when the PGW send the CCRequest(cctype=initial and ccnum=0). Lets say "Policy1" is sent by PCRF in CCA. Does this initial CCRequest has the "Flowdescription" AVP in this ?

Now a dedicated bearer1 is established so CCRequest is sent with (ccrtype =modify and ccnum=1). Lets say PCRF assigns "Policy 2".

Now dedicated bearer 1 is deleted, then what does the PGW send to PCRF ?

Another question: As of now I am storing the list of PolicyRules in PCRF, based on IMSI (IPAddress)..i.e c++ map of IPAddress and PolicyRules. But when the dedicated bearer is removed how do i access the map ? (to find which Policy is deleted)

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