3GPP1 TSG CN WG1 / ETSI STC SMG3 WPA	Tdoc N1-99584
Sophia Antipolis, France	
1-4 June, 1999

Source:	LS drafting session (Ericsson, Nokia, Nortel, Vodafone, Alcatel)
To:	SMG3 WPA/TSG CN WG1

Liaison Statement on change of MS Radio Access Capability IE
SMG2 WPA has received facsimile “Comments on MS Radio Access Capability IE” with several remarks on the change requests CR 04.08 A582 rev 4 and CR 04.08 A584 rev 2 proposing a change or the MS Radio Access Capability IE in release 97 and 98, respectively. The document was noted in Tdoc SMG2 819/99.
In response to the remarks issued by the SMG3 WPA delegates, here is the response from the SMG2 WPA delegates. 
1.	After verification with GSM 04.07, we agree that it is not possible to use the term ‘<spare bits>’. It has therefore been replaced by the ‘<spare bit>**’ construction.
2.	It was agreed to replace “earlier Access capabilities field” with “the immediately preceding Access capabilities field”, with some slight further modification.
3.	Spelling errors have been corrected.
4.	It is agreed to replace the term “reserved for future use” by “treated as unknown for the receiver”.
5.	Yes, the Revision level has been intentionally deleted. The reason for that is that it is no longer needed to make the distinction between phase 1 and phase  2 mobile stations for GPRS mobile stations. Other mechanisms will allow extension of new capabilities.
6.	Yes, the “error: struct too long” can be and has been deleted. 
7.	The “error: struct too short” has been deleted. It is not necessary, because the error handling on the network side is implementation dependent. Of course, the network implementation in future releases of the standard have to take into account mobile stations implemented according to different versions of the specification.
In addition, it may be noted that the minimum and maximum length of this information element is not expected to change, compared to the previous version.
Attached is the revised change request for release 97. The change request is however not yet formally approved by SMG2 WPA.
SMG3 WPA/TSG CN WG1is asked to accept the attached change requests proposing a modified coding of this information element. Due to the time schedule for the completion of release 97, SMG2 WPA hope that these change requests can be approved by SMG3 in time for SMG #29.

ETSI SMG2	Tdoc SMG2  820/99
Tucson, Arizona 
31.05-04-06, 1999

CHANGE REQUEST No :	A582r4	Please see embedded help file at the bottom of this
page for instructions on how to fill in this form correctly.	
	
Technical Specification GSM	04.08	Version:	6.3.0		
	
Submitted to SMG		for approval		without presentation ("non-strategic")			
list SMG plenary meeting no. here 	for information		with presentation ("strategic")			

PT SMG CR cover form is available from: http://docbox.etsi.org/tech-org/smg/Document/smg/tools/CR_form/crf28_1.zip	

Proposed change affects:	SIM		ME	x	Network	x	
(at least one should be marked with an X)

Work item:	GPRS, EDGE	

Source:	Ericsson, Nokia	Date: 	1999-06-02	

Subject:	MS Radio Access Capability IE	

Category: 	F	Correction	x	Release: 	Phase 2		
	A	Corresponds to a correction in an earlier release			Release 96		
(one category 	B	Addition of feature			Release 97	x	
and one release 	C	Functional modification of feature			Release 98		
only shall be 	D	Editorial modification			Release 99		
marked with an X)						

Reason for 
change:
	Clarification of MS Radio Access Capability IE. 

Clauses affected:	10.5.5.12a	

Other specs	Other releases of same spec	x	  List of CRs:		
affected:	Other core specifications		  List of CRs:		
	MS test specifications / TBRs		  List of CRs:		
	BSS test specifications		  List of CRs:		
	O&M specifications		  List of CRs:		

Other 
comments:	- Future expansions are enabled
- GSM Revision level is deleted as it is not needed.
- 10 oct total length is not very much so error: message too short is added

10.5.5.12a	MS Radio Access capability
The purpose of the MS RA capability information element is to provide the radio part of the network with information concerning radio aspects of the mobile station. The contents might affect the manner in which the network handles the operation of the mobile station.  
The MS RA capability is a type 4 information element. 
The value part of a MS RA capability information element is coded a shown table 10.5.146/GSM 04.08. 
-	SEMANTIC RULE : Among the three Access Type Technologies GSM 900-P, GSM 900-E and GSM 900-R only one shall be  present. 
-	Error handling : If a received Access Technology Type is unknown to the receiver, it shall ignore all the corresponding fields;
-	If within a known Access Technology Type a receiver recognizes an unknown field it shall ignore it.
-	See more details about error handling of MS radio access capability in TS GSM 08.18. 
Table 10.5.146/GSM 04.08 : Mobile Station Radio Access Capability Information Element
< MS Radio Access capability IE > ::=
<MS Radio Access capability IEI :  00100100 >
<Length of MS RA capability: <octet>> 	-- length in octets of MS RA capability value part and spare bits 
<MS RA capability  value part : < MS RA capability  value part struct >>
<spare bit>**; -- may be used for future enhancements

<MS RA capability  value part struct >::=  --recursive structure allows any number of Access technologies
< Access Technology Type: bit (4) >
< Access capabilities : <Access capabilities struct> >
{ 0 | 1 <MS RA capability  value part struct> } ;

< Access capabilities struct > ::=
	< Length : bit (7) > -- length in bits of Content and spare bits
	<Access capabilities : <Content>> 
	<spare bit>** ; -- expands to the indicated length
			  -- may be used for future enhancements

< Content > ::=
	< RF Power Capability : bit (3) >
	{ 0 | 1 <A5 bits : <A5 bits> > } -- zero means that the same values apply for parameters as in the immediately preceeding Access capabilities field within this IE.
	< ES IND : bit >
	< PS : bit >
	< VGCS : bit >
	< VBS : bit >
	{ 0 | 1 < Multislot capability : Multislot capability struct > } ;  -- zero means that the same values apply for multislot parameters as in the immediately preceeding Access capabilities field within this IE.

< Multislot capability struct > ::=
	{ 0 | 1 < HSCSD multislot class : bit (5) > }
	{ 0 | 1 < GPRS multislot class : bit (5) > < GPRS Extended Dynamic Allocation Capability : bit > }
	{ 0 | 1 < SMS_VALUE : bit (4)  > < SM_VALUE : bit (4)  > } ;

<A5 bits> ::= < A5/1 : bit> <A5/2 : bit> <A5/3 : bit> <A5/4 : bit> <A5/5 : bit> <A5/6 : bit> <A5/7 : bit>; -- bits for circuit mode ciphering algorithms

Table 10.5.146/GSM 04.08 (concluded): Mobile Station Radio Access Capability Information Element
Access Technology Type
This field indicates the access technology type to be associated with the following access capabilities.

Bits
4 3 2 1
0 0 0 0 	GSM P
0 0 0 1 	GSM E  --note that GSM E covers GSM P
0 0 1 0 	GSM R  --note that GSM R covers GSM E and GSM P
0 0 1 1 	GSM 1800
All other values are treated as unknown by the receiver.

RF Power Capability
This field is coded as radio capability in Classmark 3 for the indicated band: it contains the binary coding of he power class associated (see GSM 05.05 paragraph 4.1 output power and paragraph 4.1.1 Mobile Station). 

A5/1 
0	encryption algorithm A5/1 not available
1	encryption algorithm A5/1 available
A5/2 
0	encryption algorithm A5/2 not available
1	encryption algorithm A5/2 available
A5/3 
0	encryption algorithm A5/3 not available
1	encryption algorithm A5/3 available
A5/4 
0	encryption algorithm A5/4 not available
1	encryption algorithm A5/4 available
A5/5 
0	encryption algorithm A5/5 not available
1	encryption algorithm A5/5 available
A5/6 
0	encryption algorithm A5/6 not available
1	encryption algorithm A5/6 available
A5/7 
0	encryption algorithm A5/7 not available
1	encryption algorithm A5/7 available

. 

ES IND – (Controlled early Classmark Sending)
0	"controlled early Classmark Sending" option is not implemented 
1	"controlled early Classmark Sending" option is  implemented

PS – (Pseudo Synchronisation)
0 	PS capability not present
1	PS capability present 

VGCS – (Voice Group Call Service)
0 	no VGCS capability or no notifications wanted
1	VGCS capability and notifications wanted

VBS – (Voice Broadcast Service)
0 	no VBS capability or no notifications wanted
1	VBS capability and notifications wanted

HSCSD Multi Slot Class 
The Multi Slot Class field is coded as the binary representation of the multislot class defined in TS GSM 05.02.
Range 1 to 18, all other values are reserved.
GPRS Multi Slot Class
The GPRS Multi Slot Class field is coded as the binary representation of the multislot class defined in TS GSM 05.02.

GPRS Extended Dynamic Allocation Capability
0     Extended Dynamic Allocation Capability for GPRS is not implemented
1     Extended Dynamic Allocation Capability for GPRS is implemented

SMS_VALUE (Switch-Measure-Switch) (4 bit field)
The SMS field indicates the time needed for the mobile station to switch from one radio channel to another, perform a neighbor cell power measurement, and the switch from that radio channel to another radio channel.
Bits
4 3 2 1
0 0 0 0		1/8 timeslot (~72 microseconds)
0 0 0 1		2/8 timeslot (~144 microseconds)
0 0 1 0		3/8 timeslot (~216 microseconds)
 . . .
1 1 1 1		16/8 timeslot (~1154 microseconds)
(SM_VALUE) Switch-Measure  (4 bit field)
The SM field indicates the time needed for the mobile station to switch from one radio channel to another and perform a neighbor cell power measurement.
Bits
4 3 2 1
0 0 0 0		1/8 timeslot (~72 microseconds)
0 0 0 1		2/8 timeslot (~144 microseconds)
0 0 1 0		3/8 timeslot (~216 microseconds)
 . . .
1 1 1 1		16/8 timeslot (~1154 microseconds)