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LTE: What is SPID (Subscriber Profile Id) and what significance it has ?

+4 votes
5,086 views

I saw S1-AP "Initial Context Setup Request" message which may carry Subscriber Profile ID IE (optional). I want to know about this.

posted Aug 13, 2015 by Harshita

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2 Answers

+1 vote

Hi Harshita ,SPID is received by eNB via s1 interface is an index referring to user information.The information is ue specific and applies to all RB's.The index is mapped by the enb to locally defined configuration in order to apply specific rrm strategies(eg define rrc_idle mode priorities and control inter-rat/inter freq HO in rrc_connected mode)

SPID RANGES values 1-128->operator specific spid values
129-256-reference values

SPID=256
CONFIGURATION PARAMETERS VALUE
E-UTRAN CARRIERS PRIORITY HIGH
UTRAN CARRIERS PRIORITY MEDIUM
GERAN CARRIERS PRIORITY LOW

Hope this helps u

answer Aug 14, 2015 by Gnanendra Reddy
+1 vote

SPID can be used to take rrm decisions (like Handover or Cell Reselection) rather than using the regular method. The regular method of Handover or Cell Reselection is usually based on Power levels / SINR and/or RSRP, RSRQ thresholds etc.

Whereas the subscriber profile id approach is grouping users into different cells or frequencies based on subscription information. This will be typically useful if an operator has multiple frequencies and based on the subscription information of the users, you may want to camp him on one cell or the other.

answer Aug 24, 2015 by Sudeep Gopal
Similar Questions
+5 votes

I gone through the RFC4006 but didnt get the context of below paragraph

   Certain applications require multiple credit-control sub-sessions.
   These applications would send messages with a constant Session-Id
   AVP, but with a different CC-Sub-Session-Id AVP.  If several credit
   sub-sessions will be used, all sub-sessions MUST be closed separately
   before the main session is closed so that units per sub-session may
   be reported.  The absence of this AVP implies that no sub-sessions
   are in use.

But here my question is
1. What could be the types of Multiple credit-ontrol Sub-session?
2. How can we include different cc-sub-session-ID for each sub-session, please give me an example with message structure using CCR message.

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