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USAT enhancement for CSG cell discovery

USAT enhancement for CSG cell discovery. Gemalto Denis.lheriteau@gemalto.com. H(e)NB1=MyHome. H(e)NB2=MyBuilding. H(e)NB3= MySecondHome. CSG id1. CSG id1. CSG Id, TS 22.220 Annex C. CSG id used for automatic and manual CSG selection access control to CSG cells CSG id associated with

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USAT enhancement for CSG cell discovery

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  1. USAT enhancement forCSG cell discovery Gemalto Denis.lheriteau@gemalto.com

  2. H(e)NB1=MyHome H(e)NB2=MyBuilding H(e)NB3= MySecondHome CSG id1 CSG id1 CSG Id, TS 22.220 Annex C • CSG id used for • automatic and manual CSG selection • access control to CSG cells • CSG id associated with • a CSG, i.e. a group of users (UEs). • One or More H(e)NBs (CSG cells) • CSG id permanently stored in • H(e)NB • administration database of the operator • Allowed CSG List in the UE if user (UE) is member of CSG (USIM entry takes precedence over ME) • CSG id distribution method • provided to H(e)NB by O&M • Provided to the UE • by home PLMN using OMA DM when stored in the ME, • by OTA when stored in the USIM • via manual CSG selection • broadcasted by H(e)NB • CSG id displayed to user • YES, if HNB Name is not available (HNB Name is preferably displayed during manual CSG selection, rather than CSG id) CSG id2 CSG id3 CSG id1 CSG id2

  3. UE mobility requirement • TS 22.011 v8.8.0 Chap 8.2.2 “Idle mode operation” • “When a UE in idle mode detects the presence of a permissible CSG cell (a CSG cell whose CSG identity is in the UE’s white list), the UE shall select the CSG cell.” • Entering CSG id2, but not selecting it, because not permissible • Entering CSG id1, and selecting it, even if still under Macro cell coverage • Report CSG id1 to PLMN, and camp on CSG id1 (if not rejected by NW) 2 1 H(e)NB1 CSG id1 H(e)NB2 CSG id1 CSG id2 Macro Cell

  4. CSG cell selection Event • CSG cell selection Event is sent to the UICC whenever leaving or entering a CSG cell • information provided in the event download notification : • Access technology • CSG id • H(e)NB name • CSG cell selection status (under coverage or not, camping or not on CSG cell) • Additional info (optional) • Permissible / not permissible cell (a CSG cell whose CSG identity is in the UE’s white list) • CSG id provenance (ME or USIM) H(e)NB 1 – Terminal Profile [event supported] 2- SET UP EVENT LIST {CSG cell selection Event} 3 – Entering CSG cell, CSG id1 4 – Envelope {event download – CSG cell selection} C6-090429

  5. UE requirement for manual CSG selection • TS 22.011 v8.8.0 Chap 8.2.4 “Manual CSG Identity selection” • “The user shall be able to request the UE to perform a scan for available CSG Identities within the registered PLMN. When such request is received the UE shall perform a scan of available CSG cells, their CSG identities and their HNB Names.” • “In the UE display, the available CSG identities shall be represented by their associated HNB Names. If the HNB Name is not available, the CSG identity shall be displayed instead. An indication shall be given to the user as to which of the available CSG identities is contained in the CSG white list” • CSG type • can be displayed when UE camping on a CSG cell • Is associated with CSG id, and provides information on billing type • Eg “home zone fee”, “flat fee”, “normal communication fee” • Display not required for manual CSG selection

  6. H(e)NB4 CSG id4 H(e)NB1 CSG id1 H(e)NB3 H(e)NB2 CSG id3 CSG id1 CSG id2 Manual CSG selection, example ME parameters CSG id2, HNB name =Coffee Shop CSG id3, HNB name = Hotel Content of EF_ACSG + EF_OCSG: CSG id1, HNB name = myHome CSG id3, HNB name = myBuilding Handset display

  7. Discovery of surrounding CSG cells • Extension to PROVIDE LOCAL INFORMATION, support indicated in Terminal Profile • Terminal response contains • List of CSG ids • List of H(e)NB names • the idea is to get a the same list as the one displayed during manual CSG selection. The feature does not trig a network scan. 1 – Terminal Profile 2- Provide Local Information {discovery of surrounding CSG cells} 3 – Terminal Response {CSG id1, CSG id2, CSG id3} {HNB name1, HNB name2, HNB name3} C6-090308

  8. H(e)NB4 CSG id2 CSG id3 CSG id4 H(e)NB1 CSG id1 H(e)NB3 H(e)NB2 CSG id3 CSG id1 CSG id2 limitations -> this is dependant on handset implementation and network topology • In the Terminal Response of discovery of surrounding CSG cell, • camping CSG cell will be part of the list, for sure • Will all permissible CSG cells (CSG id2, CSG id3) part of the list? likely • Will the first CSG id1 part of the list? Maybe, if ME keeps entering CSG id in cache memory • Will CSG id4 part of the list? Likely not It is recommended to run a “REFRESH steering of roaming” command beforehand, to force handset to run a network selection process, and update ME cache memory

  9. Recommendation for 3GPP CT6 group • Agree on following CRs • CR C6-090308 “discovery of surrounding CSG cells” • CR C6-090429 “CSG cell selection event”

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