22.2203GPPRelease 17Service requirements for Home Node B (HNB) and Home eNode B (HeNB)TS
– Subject to operator and H(e)NB Hosting Party agreement, the operator shall be able to configure the H(e)NB with open, hybrid or closed access mode.
– When the H(e)NB is configured for open access mode, it shall be possible for the H(e)NB to provide services to subscribers of any PLMN, subject to roaming agreement.
– When the H(e)NB is configured for hybrid access mode, it shall be possible for the H(e)NB to provide services to:
– its associated CSG members, and
– subscribers of any PLMN not belonging to its associated CSG, subject to roaming agreement.
– When the H(e)NB is configured for closed access mode, only users that belong to its associated CSG shall be able to obtain services.
– CSG members may include subscriber of any PLMN subject to roaming agreement, defined as HPLMN CSG Roaming.
– The VPLMN may support VPLMN Autonomous CSG Roaming by providing CSG membership to the roaming subscriber without exchanging any CSG specific information with the HPLMN. The VPLMN shall disable VPLMN Autonomous CSG Roaming on a per HPLMN basis if requested by the home operator.
NOTE: VPLMN Autonomous CSG Roaming and HPLMN CSG Roaming can be active in the same VPLMN
– The CSG membership granted to the subscriber during his stay in the VPLMN may be retained by the VPLMN (e.g. in case the subscriber moves to another PLMN and subsequently returns to the VPLMN).
5.3.2 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).
– For each subscriber, the network maintains a single CSG list containing the CSG identities that the subscriber is allowed to use.
– 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.
– Except during manual CSG selection, 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 (“not suitable” as specified in TS 25.304  and TS 36.304 ).
– 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.