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Presentation name - 1NORTEL NETWORKS CONFIDENTIAL

RRM Evolution

Presentation name - 2NORTEL NETWORKS CONFIDENTIAL

Always- on

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Presentation name - 3NORTEL NETWORKS CONFIDENTIAL

Service Availability Drives Revenue

The internet model often implies the use ofbursty applications such as e-mail or webbrowsing

Subscribers wish to have instant access andnotification an Always On service

Providing Always On could imply reserving

valuable radio resources for a specific subscriber even when those resources are not in use

Dilemma : Resource Optimization vs. Service Comfort

Presentation name - 4NORTEL NETWORKS CONFIDENTIAL

A Typical Internet Session

Time

Download

Download

Download

Read

IdleRead

Download

Download

Read Read

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Presentation name - 5NORTEL NETWORKS CONFIDENTIAL

Nortel Networks Always On ImplementationTime

T1 is configurable and applied based on service level (i.e., Professional, Gold, Silver, Bronze)

Te (establishment time) is instantaneous within T1

After download link

is idle, T1 starts

User begins a session,

is allocated a 64 kbps bearer,downloads information

User requests download before

T1 expires, session re-established

instantaneously

After download link

is idle, T1 starts

T1 expires, user is re-allocated

to an 8 kbps bearer, freeing a

64 kbps bearer for use, T2 starts

T2 is configurable and applied based on service level (i.e., Professional, Gold, Silver, Bronze)

Te (establishment time) is no more than 1 second within T2, 3 5 seconds after T2 expires

User wakes up before T2 expires, requests

download and is re-allocated to a 64 kbps bearer,session re-established within 1 second

Download completes, user becomes idle past T1, user

is re-allocated to 8 kpbs bearer, freeing a 64 kbpsbearer for use, user stays idle past expiration of T2

User wakes up and requests download,

user is re-allocated to a 64 kbps bearer,

session is re-established in 3 5 seconds

Presentation name - 6NORTEL NETWORKS CONFIDENTIAL

Rate adaptation

Based on user activity the DCH is downsized / upsized to32Kb UL/8Kb DL

8Kb/s DL is part of 34.108 (ISG)

8Kb/s still allows limited user traffic

Only applies to "Interactive" and "Background"

DTCH: 64Kb/s

3 DCCH: 3.4Kb/s DCH

SF32

DTCH: 8Kb/s

3 DCCH: 3.4Kb/s DCH

SF128

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Presentation name - 7NORTEL NETWORKS CONFIDENTIAL

RRC connection release

In a second step, if the user connection is still inactive for along period, the RRC connection is released by the RNC

the PDP context is still active

the SGSN/GGSN GTP tunnel is still active

user traffic can easily be resumed on user/network demand

UE RNC SGSN GGSN

GTP tunnel

PPP

PDP

ctx

Presentation name - 8NORTEL NETWORKS CONFIDENTIAL

Conclusion

In the beginning of UMTS true sharing of radioresources (DSCH) cannot be provided due to the lackof support from the mobiles

Nortel "always on" feature allows the operator to:

Optimise the use of radio resources in the cell Provide early push services to its subscribers

In the future shared radio resource management willenable to increase the number of users per cell forpacket services