ETSI STC SMG2 Handover ad-Hoc	Document	Tdoc 35/00	
Copenhagen, Denmark
6 – 8 March, 2000		Revised Tdoc RPA000019	

CHANGE REQUEST	Please see embedded help file at the bottom of this
page for instructions on how to fill in this form correctly.	
	
	04.18	CR	A057r2	Current Version:	8.2.0		
					
GSM (AA.BB) or 3G (AA.BBB) specification number 		 CR number as allocated by MCC support team	
	
For submission to: 	SMG#31bis	for approval	X		strategic		(for SMG	
list expected approval meeting # here 	for information			non-strategic		use only)	
			
Form: CR cover sheet, version 2 for 3GPP and SMG        The latest version of this form is available from: ftp://ftp.3gpp.org/Information/CR-Form-v2.doc	
	
Proposed change affects:	(U)SIM		ME	x	UTRAN / Radio	x	Core Network		
(at least one should be marked with an X)	
	
Source:	Ericsson,  Siemens	Date: 	000304	
	
Subject:	Measurement Order – Idle Mode	
	
Work item:	Handover GSM UMTS	
	
Category: 	F	Correction		Release: 	Phase 2		
	A	Corresponds to a correction in an earlier release			Release 96		
(only one category 	B	Addition of feature	X		Release 97		
shall be marked	C	Functional modification of feature	 		Release 98		
with an X)	D	Editorial modification			Release 99	X	
				Release 00		
	
Reason for 
change:

	In order to facilitate for the mobile to perform UMTS measurements in Idle mode only when there are UMTS neighbour(s) an optional field is introduced in existing System Info message SI2bis.The mobile shall use the UMTS measurements in the Inter System Cell selection procedure. An offset to compensate for the actual interference level in the cell is downloaded. The offset Moffset is used for direct comparison of UMTS and GSM measurements. By downloading  Moffset  and the GSM threshold Qsearch in SI2bis the network is controlling the Inter System Cell selection. 	
	
Clauses affected:	Chapter 10.5.2.33	
	
Other specs	Other 3G core specifications	X	  List of CRs:		
affected:	Other GSM core specifications		  List of CRs:		
	MS test specifications		  List of CRs:		
	BSS test specifications		  List of CRs:		
	O&M specifications		  List of CRs:		
	
Other 
comments:	The UMTS flag provides a simple and reliable solution for release 99.More advanced solutions are foreseen for later phases.

  <--------- double-click here for help and instructions on how to create a CR.

	10.5.2.32	SI 1 Rest Octets
The SI 1 Rest Octets information element contains the position about the NCH and spare bits.
The SI 1 Rest Octets information element is a type 5 information element with 1 octet length.
<SI1 Rest Octets> ::=
	{L |H  <NCH Position : bit (5)> };
 	<spare padding> ;

Table 10.5.71/GSM 04.18 SI 1 Rest Octets information element
                                                        
NCH Position on the CCCH                                
                                                        
The values in the NCH Position field indicates the block
number of the CCCH block which is used for the          
first NCH block and the number of blocks used           
for the NCH. (The block numbering corresponds           
to table 5 in section 7 of GSM 05.02)                   
                                                        
The absence of the NCH position field indicates that    
there is no NCH in the cell/on the carrying CCCH slot   
                                                        
The following coding applies if 1 or more basic         
physical channels are used for CCCH, not combined with  
 SDCCHs.                                                
        Value     No of blocks Number of first block    
      0 0 0 0 0   1             0                       
      0 0 0 0 1   1             1                       
      0 0 0 1 0   1             2                       
      0 0 0 1 1   1             3                       
      0 0 1 0 0   1             4                       
      0 0 1 0 1   1             5                       
      0 0 1 1 0   1             6                       
      0 0 1 1 1   2             0                       
      0 1 0 0 0   2             1                       
      0 1 0 0 1   2             2                       
      0 1 0 1 0   2             3                       
      0 1 0 1 1   2             4                       
      0 1 1 0 0   2             5                       
      0 1 1 0 1   3             0                       
      0 1 1 1 0   3             1                       
      0 1 1 1 1   3             2                       
      1 0 0 0 0   3             3                       
      1 0 0 0 1   3             4                       
      1 0 0 1 0   4             0                       
      1 0 0 1 1   4             1                       
      1 0 1 0 0   4             2                       
      1 0 1 0 1   4             3                       
      1 0 1 1 0   5             0                       
      1 0 1 1 1   5             1                       
      1 1 0 0 0   5             2                       
      1 1 0 0 1   6             0                       
      1 1 0 1 0   6             1                       
      1 1 0 1 1   7             0                       
                                                        
 Other values are reserved for future use. A mobile     
 station receiving a reserved value shall behave as if  
 the NCH position was not present                       

In the case the CCCH configuration is not compatible with the NCH position (e.g., CCCH with combined SDCCH and the value different from 00000, 00001 or 00111), the mobile station shall behave as if the NCH Position field was not present.
	10.5.2.33	SI 2bis Rest Octets
. The SI 2bis Rest Octets information element contains and optional information about existence of UMTS neighbour(s) and spare bit(s). The purpose of the spare bit(s) is to allow the upward compatible introduction of new information on the BCCH in later phases.
The SI 2bis Rest Octets information element is a type 5 information element with 1 octet  length.
<SI2bis Rest Octets> ::= 
 L  H 	< Qsearch : bit (3) >
			< Moffset : bit (4) > }
<spare padding> ;

Qsearch (3 bit field)

Qsearch is the GSM threshold when to perform UMTS measurements.
Qsearch is a binary coded representation of a corresponding GSM signal strength on the serving cell. 

0 0 0   Qsearch threshold 1, -102 dBm
0 0 1   Qsearch threshold 2, - 86 dBm
0 1 0   Qsearch threshold 3, - 80 dBm
0 1 1   Qsearch threshold 4, - 74 dBm
1 0 0   Qsearch threshold 5, - 68 dBm
1 0 1   Qsearch threshold 6, - 62 dBm1 1 0   Qsearch threshold 7, - 56 dBm
1 1 1   Qsearch threshold 8, 

Moffset (4 bit field)

Moffset is used when calculating the quality of the best UTRAN cell according to the formula specified in TS 25.304 . The calculated value is compared to the best (serving or non-serving) GSM cell. 
Moffset is a dimensionless binary representation of a corresponding interference level.. 

	10.5.2.33a	SI 2ter Rest Octets
The SI 2ter Rest Octets information element contains only spare bits. Its purpose is to allow the upward compatible introduction of new information on the BCCH in later phases.
The SI 2ter Rest Octets information element is a type 5 information element with 4 octets length.
<SI2ter Rest Octets> ::= 
	    <spare padding> ;