DL - 4G Americas

The mechanism shall properly handle SRVCC for an IMS-based priority call established in LTE in order for
the network to successfully hand over the call from LTE to CS in GERAN/UTRAN or 1xCS.
8.4.4 SIPTO SERVICE CONTINUITY OF IP DATA SESSION (SIPTO_SC)
In Rel-10, 3GPP has specified requirements for the support of Selected IP Traffic Offload (SIPTO) from
the macro network and from H(e)NB subsystems in an enterprise/residential environment (subsequently
called a H(e)NB-involved network). However, requirements related to the service continuity of existing IP
data sessions during mobility events in the macro network when SIPTO is used and also between macronetwork
and H(e)NB-involved network have not been provided in detail. This work item aims to review
use cases and develop requirements for a system that will enable the mobile operators to provide
services in a more effective manner, as well as improving the user experience for the following scenarios:
� Service continuity of IP data session(s) when a UE, whose data is offloaded, moves between
(e)NBs in the macro network
� Service continuity of IP data session(s) when a UE, whose data is offloaded, moves between
H(e)NBs in an enterprise/residential environment
� Service continuity of IP data session(s) when a UE, whose data is offloaded, moves between the
macro-network and H(e)NB sub-system in an enterprise/residential environment
8.4.5 QOS CONTROL BASED ON SUBSCRIBER SPENDING LIMITS (QOS_SSL)
This work item aims to provide a mechanism to allow a mobile operator to have a much finer granularity
of control of the subscriber’s usage of the network resources by linking the subscriber’s data session QoS
with a spending limit. This gives the operator the ability to deny a subscriber access to particular services
if the subscriber has reached his/her allocated spending limit within a certain time period. It would be
useful if, in addition, the bandwidth of a subscriber’s data session could be modified when this spending
level is reached. This could be done depending on, for example, the type of service being used by the
subscriber, the subscriber’s spending limit and amount already spent and operator’s charging models.
This allows the operator to have an additional means of shaping the subscriber’s traffic in order to avoid
subscribers monopolizing the network resource at any given time. Since support for roaming scenarios is
needed, the possibility to provide support for roaming subscribers without having dedicated support in the
visited network is needed.
Upon triggers based on the operator’s charging models, the subscriber could be given the opportunity to
purchase additional credit that increases the spending limit.
The objective of this study is to provide use cases/service requirements and specs that allow:
� Modification of QoS based on subscriber’s spending limits
� Enforcing of spending limits for roaming subscribers without having dedicated support in the visited
network
8.4.6 NON‐VOICE EMERGENCY SERVICES (NOVES)
Non-verbal communications such as text messaging and instant messaging via wireless devices has
been very successful and continues to expand. Many of the consumers assume that they can utilize
www.4gamericas.org February 2011 Page 91