Wired n Wireless - Few more interesting things on LTE.

GTP & PMIPv6

So, looking at the market I came to know that PMIPv6 is the one that will be deployed over S5 interface, no matter wether the existing service provider network is GSM based or CDMA based. Even I have been PMIP supporter for a while as it avoids complexity over S5. Reduces complexity? I was thinking over bearers one day and realized something.

In LTE a UE can have 11 bearers altogether established per APN. Note that EPS bearers are GTP based bearers. Now on S5 interface there is no concept of default bearer or dedicated bearer. That is there is only one bearer (PMIP) per UE per APN. The question is how are multiple bearers on S1_U interface mapped to single bearer on S5 interface. Lets call each bearer as a pipe with different quality of service running different applications. Since each pipe is identified by a TEID we can enforce all the QoS on it over S1_U. But how will the same be mapped over S5 interface? Interesting? Any clues?

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