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3GPP (CT4)
TS 03.07














Restoration Procedures

(P) GSM Rel-98 v7.1.0    1999/12    21 p.
(P) GSM Rel-97 v6.2.0    1999/06    18 p.
(W) GSM Rel-96 v5.1.0    1997/10    18 p.
(W) GSM Phase-2 v4.3.1    1996/01    15 p.
(P) GSM Phase-1 v3.2.1    1992/02    13 p.

Rapporteur:  PARK, Ian David Chalmers
Descendant(s):  TS 23.007    

The data stored in location registers are automatically updated in normal operation; the main information stored in a location register defines the location of each mobile station and the subscriber data required to handle traffic for each mobile subscriber. The loss or corruption of these data will seriously degrade the service offered to mobile subscribers; it is therefore necessary to define procedures to limit the effects of failure of a location register, and to restore the location register data automatically. This TS defines the necessary procedures.

The basic principle is that restoration should be based on radio contact to avoid faulty data being spread in the system.

Subscriber data for supplementary services must also be correctly restored, although the impact on service of corruption of supplementary service data is less severe.

Procedures for supporting these functions are defined in TS 09.02 and TS 09.60.

1   Scope   PDF-p. 6
2   Design objectives
3   Restoration indicators in location registers and in GPRS support nodes
4   Restoration of data in the VLR   PDF-p. 9
5   Restoration of data in the HLR      Up
6   Periodic location updating
7   Periodic routeing area updating
8   Stand-alone operation of the VLR
9   Stand-alone operation of the SGSN   PDF-p. 16
10   Restoration of data in the GGSN
11   Restoration of data in the SGSN
12   Restoration of Data in an SMLC
13   Restoration of Data in an LMU
A   Change history   PDF-p. 20