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Content for  TS 23.231  Word version:  17.0.0

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8  Handover/Relocationp. 44

8.1  UMTS to UMTSp. 44

In the context of the following clauses, the terms RNS or RNC refer also to a GERAN BSS or BSC (respectively) when serving an UE in Iu mode.

8.1.1  Intra-MSC SRNS/SBSS Relocationp. 44

The procedures specified in TS 23.009 for "Intra-3G_MSC SRNS Relocation" shall be followed. The following clauses describe the additional requirements for the SIP-I based CS core network.

8.1.1.1  Intra-MGW Relocationp. 44

The handling of Intra-MSC Intra-MGW SRNS/SBSS Relocation shall be performed in accordance with clause 8.1.1 of TS 23.205.

8.1.1.2  Inter-MGW Relocationp. 44

Procedures used for the Intra-MSC Inter-MGW SRNS/SBSS Relocation are equivalent to those specified in accordance with TS 23.205, with the exception that the procedures for establishing the bearer between the MGW will be in accordance with normal procedures as defined within clause 15.2.

8.1.2  Basic Inter-MSC SRNS/SBSS Relocationp. 44

Procedures used for the basic Inter-MSC SRNS/SBSS Relocation are equivalent to those specified in accordance to clause 8.1.2 of TS 23.205, with the exception that the call and bearer establishment procedures between the MSCs and MGWs will be in accordance with normal procedures as defined within clause 15.2.

8.1.3  Subsequent Inter-MSC SRNS/SBSS Relocation back to the Anchor MSCp. 44

Procedures used for the subsequent Inter-MSC SRNS/SBSS Relocation back to the anchor MSC are equivalent to those specified in accordance to clause 8.1.3 of TS 23.205, with the exception that the call clearing and bearer release procedures between the MSCs and MGWs will be in accordance with normal procedures as defined within clause 15.2.
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8.1.4  Subsequent Inter-MSC SRNS/SBSS Relocation to a third MSCp. 44

Procedures used for the subsequent Inter-MSC SRNS/SBSS Relocation to a third MSC are equivalent to those specified in accordance to clause 8.1.4 of TS 23.205, with the exception that the call establishment, call clearing, bearer establishment and bearer release procedures between the MSCs and MGWs will be in accordance with normal procedures as defined within clause 15.2.
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8.1.5  SRNS/SBSS Relocation with Iu on IPp. 45

If IuCS on IP is supported by the MSC server, the Core Network side procedures described in clauses through 8.1.1 to 8.1.4 shall apply, and the Access Network side procedures described in clause 8.1.5 of TS 23.205 shall apply.

8.2  UMTS to GSMp. 45

In the context of the following clauses, the terms RNS or RNC refer also to a GERAN BSS or BSC (respectively) when serving an UE in Iu mode.

8.2.1  Intra-MSC UMTS to GSM Handoverp. 45

The procedures specified in TS 23.009 for "Intra-3G_MSC Handover from UMTS to GSM" shall be followed. The following clauses describe the additional requirements for the SIP-I based CS core network.

8.2.1.1  Intra-MGW Relocationp. 45

The handling of Intra-MSC Intra-MGW UMTS to GSM Handover shall be performed in accordance with clause 8.2.1 of TS 23.205.

8.2.1.2  Inter-MGW Relocationp. 45

Procedures used for the Intra-MSC Inter-MGW UMTS to GSM Handover are equivalent to those specified in accordance with TS 23.205, with the exception that the procedures for establishing the bearer between the MGW will be in accordance with normal procedures as defined within clause 15.2.

8.2.1.3  Intra-MSC UMTS to GSM Handover for A interface over IPp. 45

The handling of Intra-MSC UMTS to GSM Handover for A interface over IP shall be performed in accordance with clause 8.2.1.10 of TS 23.205.

8.2.2  Basic Inter-MSC UMTS to GSM Handoverp. 45

Procedures used for the basic Inter-MSC UMTS to GSM Handover are equivalent to those specified in accordance to clause 8.2.2 of TS 23.205, with the exception that the call and bearer establishment procedures between the MSCs and MGWs will be in accordance with normal procedures as defined within clause 15.2.

8.2.2.1  Basic Inter-MSC UMTS to GSM Handover for A Interface over IPp. 45

The handling of Basic MSC UMTS to GSM Handover for A interface over IP shall be performed in accordance with clause 8.2.2.3 of TS 23.205.

8.2.3  Subsequent Inter-MSC UMTS to GSM Handover back to the Anchor MSCp. 45

Procedures used for the subsequent Inter-MSC UMTS to GSM Handover back to the anchor MSC are equivalent to those specified in accordance to clause 8.2.3 of TS 23.205, with the exception that the call clearing and bearer release procedures between the MSCs and MGWs will be in accordance with normal procedures as defined within clause 15.2.
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8.2.3.1  Subsequent Inter-MSC UMTS to GSM Handover back to the anchor MSC for A Interface over IPp. 45

The handling of Subsequent Inter-MSC UMTS to GSM Handover back to the anchor MSC for A Interface over IP shall be performed in accordance with clause 8.2.3.3 of TS 23.205.

8.2.4  Subsequent Inter-MSC UMTS to GSM Handover to a third MSCp. 46

Procedures used for the subsequent Inter-MSC UMTS to GSM Handover to a third MSC are equivalent to those specified in accordance to clause 8.2.4 of TS 23.205, with the exception that the call establishment, call clearing, bearer establishment and bearer release procedures between the MSCs and MGWs will be in accordance with normal procedures as defined within clause 15.2.
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8.3  GSM to UMTSp. 46

8.3.1  Intra-MSC GSM to UMTS Handoverp. 46

The procedures specified in TS 23.009 for "Intra-3G_MSC GSM to UMTS Handover" shall be followed. The following clauses describe the additional requirements for the SIP-I based CS core network.

8.3.1.1  Intra-MGW Relocationp. 46

The handling of Intra-MSC Intra-MGW GSM to UMTS Handover shall be performed in accordance with clause 8.2.1 of TS 23.205.

8.3.1.2  Inter-MGW Relocationp. 46

Procedures used for the Intra-MSC Inter-MGW GSM to UMTS Handover are equivalent to those specified in accordance with TS 23.205, with the exception that the procedures for establishing the bearer between the MGW will be in accordance with normal procedures as defined within clause 15.2.

8.3.2  Basic Inter-MSC GSM to UMTS Handoverp. 46

Procedures used for the basic Inter-MSC GSM to UMTS Handover are equivalent to those specified in accordance to clause 8.3.2 of TS 23.205, with the exception that the call and bearer establishment procedures between the MSCs and MGWs will be in accordance with normal procedures as defined within clause 15.2.

8.3.3  Subsequent Inter-MSC GSM to UMTS Handover back to the Anchor MSCp. 46

Procedures used for the subsequent Inter-MSC GSM to UMTS Handover back to the anchor MSC are equivalent to those specified in accordance to clause 8.3.3 of TS 23.205, with the exception that the call clearing and bearer release procedures between the MSCs and MGWs will be in accordance with normal procedures as defined within clause 15.2.
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8.3.4  Subsequent Inter-MSC GSM to UMTS Handover to a third MSCp. 46

Procedures used for the subsequent Inter-MSC GSM to UMTS Handover to a third MSC are equivalent to those specified in accordance to clause 8.3.4 of TS 23.205, with the exception that the call establishment, call clearing, bearer establishment and bearer release procedures between the MSCs and MGWs will be in accordance with normal procedures as defined within clause 15.2.
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8.3.5  GSM to UMTS Handover with Iu on IPp. 46

If IuCS on IP is supported by the MSC server, the Core Network side procedures described in clauses through 8.3.1 to 8.3.4 shall apply, and the Access Network side procedures described in clause 8.3.5 of TS 23.205 shall apply.

8.4  GSM to GSMp. 47

8.4.1  Intra-MSC Inter-BSS GSM to GSM Handoverp. 47

The procedures specified in TS 23.009 for "Intra-MSC Handover" shall be followed. The following clauses describe the additional requirements for the SIP-I based CS core network.

8.4.1.1  Intra-MGW Relocationp. 47

The handling of Intra-MSC Intra-MGW GSM to GSM Handover shall be performed in accordance with clause 8.4.1 of TS 23.205.

8.4.1.2  Inter-MGW Relocationp. 47

Procedures used for the Intra-MSC Inter-MGW GSM to GSM Handover are equivalent to those specified in accordance with TS 23.205, with the exception that the procedures for establishing the bearer between the MGW will be in accordance with normal procedures as defined within clause 15.2.

8.4.1.3  Intra-MSC GSM to GSM Handover for A interface over IPp. 47

The handling of Intra-MSC GSM to GSM Handover for A interface over IP shall be performed in accordance with clause 8.4.1.9 of TS 23.205.

8.4.2  Basic Inter-MSC GSM to GSM Handoverp. 47

Procedures used for the basic Inter-MSC GSM to GSM Handover are equivalent to those specified in accordance to clause 8.4.2 of TS 23.205, with the exception that the call and bearer establishment procedures between the MSCs and MGWs will be in accordance with normal procedures as defined within clause 15.2.

8.4.2.1  Basic Inter-MSC GSM to GSM Handover for A Interface over IPp. 47

The handling of Basic Inter-MSC GSM to GSM Handover for A Interface over IP shall be performed in accordance with clause 8.4.2.3 of TS 23.205.

8.4.3  Subsequent Inter-MSC GSM to GSM Handover back to the Anchor MSCp. 47

Procedures used for the subsequent Inter-MSC GSM to GSM Handover back to the anchor MSC are equivalent to those specified in accordance to clause 8.4.3 of TS 23.205, with the exception that the call clearing and bearer release procedures between the MSCs and MGWs will be in accordance with normal procedures as defined within clause 15.2.
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8.4.3.1  Subsequent Inter-MSC GSM to GSM Handover back to the anchor MSC for A Interface over IPp. 47

The handling of Subsequent Inter-MSC GSM to GSM Handover back to the anchor MSC for A Interface over IP shall be performed in accordance with clause 8.4.3.3 of TS 23.205.

8.4.4  Subsequent GSM to GSM Handover to a third MSCp. 47

Procedures used for the subsequent Inter-MSC GSM to GSM Handover to a third MSC are equivalent to those specified in accordance to clause 8.4.4 of TS 23.205, with the exception that the call establishment, call clearing, bearer establishment and bearer release procedures between the MSCs and MGWs will be in accordance with normal procedures as defined within clause 15.2.
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8.4.5  BSS Internal Handoverp. 48

The handling of Intra-MSC BSS Internal Handover shall be performed in accordance with clause 8.4.5 of TS 23.205.

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