7.7.79 PS Handover XID Parameters
29.0603GPPGeneral Packet Radio Service (GPRS)GPRS Tunnelling Protocol (GTP) across the Gn and Gp interfaceRelease 17TS
The PS Handover XID Parameters IE contains for a particular packet flow the LLC XID parameters (with the SNDCP XID parameters contained within) that need to be transferred between SGSNs during the PS handover procedure (see 3GPP TS 43.129 [37]).
The PS Handover XID Parameters IE shall contain a SAPI and XiD parameters for each unique SAPI value contained within the PDP Contexts included in the Forward Relocation Request message.
The SAPI is an integer value in the range [0; 15].
The XID parameters IE contains the SNDCP / LLC XID parameter between peer SNDCP /LLC entities in the MS and old SGSN as defined in 3GPP TS44.064 [11], 3GPP TS44.065 [38].
The XID parameters Length represents the length of the XiD parameters field, excluding the XiD parameters Length octet. If the XID parameters do not exist in the old SGSN, the XID parameters Length shall be set to zero.
The spare bits x indicate unused bits, which shall be set to 0 by the sending side and which shall not be evaluated by the receiving side.
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Bits |
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Octets |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
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1 |
Type = 180 (Decimal) |
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2-3 |
Length |
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4 |
x |
x |
x |
x |
SAPI |
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5 |
XiD parameters length |
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6 -n |
XiD parameters |
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Figure 7.7.79: PS Handover XID Parameters Information Element