A short described difference between Default bearer and Dedicated Bearer?

Question

Hello all,

I am trying to create Dedicated EPS bearer to the dongle, But the issue is when MME receives create bearer request from the SGW, it sends Activate Dedicated Bearer Context Request to UE dongle, But UE is not responding with Activate Dedicated Bearer Context Accept message.?

Could anybody please come with possible solutions for the same?

By the UE is sending combined EPS attach.?

Answer 1

Default EPS Bearer :

• Be established during Attach Process
• Allocate IP address to UE
• Does not have specifc QoS (only Nominal QoS is applied).

• Similar to Primary PDP Context in UMTS

  Dedicated EPS Bearer:

• Normally be established during the call setup after idle mode. (but can be established during the attach as well).

• Does not allocate any additional IP address to UE
• Is linked to a specified default EPS bearer
• Have a specific (usually guaranteed) QoS
• Similar to Secondary PDP Context in UMTS

Comments

how many maximum number of defult and dedicated bearer that one UE have at a time??

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AFAIK it is 11..

Answer 2

UE gets IP address as part of default bearer setup. Dedicated bearer is always associated to a default bearer (i.e. Linked bearer id). Deletion of a dedicated bearer doesn't result session termination but default bearer deletion causes session termination.

A UE can have maximum of 8 data bearers. It may be in any combination of dedicated and default bearer but I saw 4 APN support at Samsung S4 model.

Comments

Thanks vimal .
I want to know 4 APN supports means 4 Ip allocated to UE at 4 different PDN.How UE manage 4 Ip at a time for using data transmission.