Common requirements for Home NodeB/eNodeB - PART2

Closed Subscriber Group

- The CSG manager shall be able, under the operator supervision, to add, remove and view CSG membership

NOTE: the interaction of the user with the application that manages the Allowed CSG Lists is out of scope of 3GPP (e.g. Web interface).

- The UE shall contain a list of allowed CSG identities (Allowed CSG List). It shall be possible to store the Allowed CSG List in the USIM. When available, the list on the USIM shall be used. It shall be possible for both, the operator and the UE, to modify the Allowed CSG List.

- The UE shall allow the user to introduce new CSGs to the Allowed CSG List by means of manual CSG selection only.

- The UE shall maintain an operator controlled list of allowed CSG identities (Operator CSG list). It shall be possible to store the Operator CSG list in the USIM. When available, the list on the USIM shall be used. It shall be possible for the operator to modify the Operator CSG List.

- The two lists are maintained independently from each other. A change in the Operator CSG list shall not trigger the UE to modify the Allowed CSG list to reflect such change automatically.

- All CSG cells belonging to a CSG identity not included in the Allowed CSG List or Operator CSG list shall be considered not suitable by the UE.
- Each CSG identity shall be associated to a subscriber group which identifies the subscribers allowed to access the CSG.

- When the subscriber group is updated, the affected UE shall be informed accordingly.

- For temporary members, it shall be possible to limit the period of time during which the subscriber is considered a member of a CSG (granted access rights). It shall be possible to configure a time period for each temporary member.

- The time period shall be configurable by the CSG manager and/or the operator operating the CSG and shall span from 1 decihour to several days. Unlimited membership to the CSG is allowed.

- When a CSG is no longer considered available to provide services, except for emergency calls (i.e. due to time period expiry or removal of the CSG membership), it shall be possible to continue the established communication in another cell not belonging to this CSG.

- In hybrid access mode when services cannot be provided to a CSG member due to a shortage of H(e)NB resources it shall be possible to continue the established communication of non-CSG members in another cell.

- In hybrid access mode, to minimise the impact on CSG members from established communication of non-CSG members, it shall be possible for the network to allow the data rate of established PS communication of non-CSG members to be reduced.