USAT enhancement for CSG cell discovery - PowerPoint PPT Presentation


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USAT enhancement for CSG cell discovery


automatic and manual CSG selection. access control to CSG cells. CSG id associated with ... {HNB name1, HNB name2, HNB name3} C6-090308. 1 Terminal Profile. 8 ... – PowerPoint PPT presentation

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Title: USAT enhancement for CSG cell discovery

USAT enhancement for CSG cell discovery
  • Gemalto

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 OM
  • 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

CSG id2 CSG id3
CSG id1 CSG id2
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 UEs 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)

CSG id1
CSG id1
CSG id2
Macro Cell
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
  • 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 UEs white list)
  • CSG id provenance (ME or USIM)

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
UE requirement for manual CSG selection
  • TS 22.011 v8.8.0 Chap 8.2.4 Manual CSG Identity
  • 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
  • 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

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
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
  • In the Terminal Response of discovery of
    surrounding CSG cell,
  • camping CSG cell will be part of the list, for
  • 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

-gt this is dependant on handset implementation
and network topology
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
Recommendation for 3GPP CT6 group
  • Agree on following CRs
  • CR C6-090308 discovery of surrounding CSG cells
  • CR C6-090429 CSG cell selection event