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3GPP TS22&23 Key point

3GPP TS22&23 Key point. ¹. handover possible?. to UMTS. to GSM-. cs. to GSM-GPRS. to IMT2000. UMTS. From UMTS. O. O. O. x. From GSM-. cs. O. oos. oos. oos. From GSM-GPRS. O. oos. oos. oos. ¹. x. oos. oos. oos. From IMT2000. UMTS.

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3GPP TS22&23 Key point

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  1. 3GPPTS22&23 Key point

  2. ¹ handover possible? to UMTS to GSM- cs to GSM-GPRS to IMT2000 UMTS From UMTS O O O x From GSM- cs O oos oos oos From GSM-GPRS O oos oos oos ¹ x oos oos oos From IMT2000 UMTS oos = out of scope of UMTS specifications O = supporting standards required for UMTS release 99. x= supporting standards required, not necessarily for release 99. IMT-2000UMTS: different system from UMTS (WCDMA) e.g. Cdma2000 Handover requirements/Matrix (TS22.129) • UMTS R99 shall be defined which: • Enable handover to a GSM network from a UMTS network • Enable handover to a UMTS network from a GSM network • Handover of real time PS services between UMTS and GPRS R99 is out of the scope of UMTS R99 phase 1. • Service continuity of best effort packet services between UMTS and GPRS is required.

  3. Handover type • Intra-handover - Internal handover: between channels on a cell or cells controlled by a single BSS, without reference to the MSC - External handover: between channels on a same cell or between cells on the same BSS which are controlled by MSC - Intra-3G_MSC GSM to UMTS handover: from BSS to RNS controlled by the same 3G_MSC - Intra-3G_MSC UMTS to GSM handover: from RNS to BSS controlled by the same 3G_MSC • Inter-handover - Inter-MSC handover (1) Basic Inter-MSC handover: MSC-A to MSC-B (2) Subsequent Inter-MSC handover: MSC-B to MSC-C (3) Subsequent Inter-MSC handback: MSC-B to MSC-A - Inter-3G_MSC handover (1) UMTS to GSM handover (2) GSM to UMTS handovezr (3) Inter-3G_MSC relocation • Inter-system handover handover between RNS and BSS, connected to same 3G_MSC which supports A-interface (this is categorized as Intra-handover) • Soft and Hard handover - Soft handover Performed within UTRAN between same frequency channels, without involving the core network - Hard handover May be also performed within UTRAN between different frequency channels, or the core network may be involved if Iur interface between RNSs does not exist.

  4. Handover procedures (TS23.009) GSM MSC BSS (1) Intra-MSC handover between base stations connected to the same MSC Intra HO BSS 3G MSC RNS Intra 3G_HO (2’) Intra-3G_MSC handover between base stations connected to the same 3G_MSC (2) Inter system handover between RNS and BSS if 3G_MSC supports A-interface RNS 3G MSC BSS Intra 3G_MSC GSM to UMTS HO 3G_MSC UMTS to GSM HO RNS Inter sys.HO GSM MSC BSS (3) Inter MSC handover between base stations connected to different MSC Inter HO GSM MSC BSS RNS 3G MSC (4) Inter 3G_MSC handover between RNSs connected to different 3G_MSC Inter 3G_HO 3G MSC RNS RNS: Radio Network Subsystem BSS:Base Station Subsystem

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