< Neighbour cell params struct > ::=

< START_FREQUENCY : bit (10) >

< Cell selection params : < Cell Selection struct > >

< NR_OF_REMAINING_CELLS : bit (4) >

< FREQ_DIFF_LENGTH : bit (3) >

{ < FREQUENCY_DIFF : bit (1 + val(FREQ_DIFF_LENGTH)) >

< Cell selection params : < Cell Selection struct > > } * (val(NR_OF_REMAINING_CELLS)) ;

< Cell Selection struct > ::=

< BSIC : bit (6) >

< CELL_BAR_ACCESS_2 : bit >

< EXC_ACC : bit >

< SAME_RA_AS_SERVING_CELL : bit (1) >

{ 0 | 1 < GPRS_RXLEV_ACCESS_MIN : bit (6) >

< GPRS_MS_TXPWR_MAX_CCH : bit (5) > }

{ 0 | 1 < GPRS_TEMPORARY_OFFSET : bit (3) >

< GPRS_PENALTY_TIME : bit (5) > }

{ 0 | 1 < GPRS_RESELECT_OFFSET : bit (5) > }

{ 0 | 1 < HCS params : < HCS struct > > }

{ 0 | 1 < SI13_PBCCH_LOCATION : < SI13_PBCCH_LOCATION struct > > } ;

< SI13_PBCCH_LOCATION struct > ::=

{ 0 < SI13_LOCATION : bit (1) >

| 1 < PBCCH_LOCATION : bit (2) >

< PSI1_REPEAT_PERIOD : bit (4) > } ;

< HCS struct > ::=

< PRIORITY_CLASS : bit (3) >

< HCS_THR : bit (5) > ;

< Neighbour Cell params 2 struct > ::=

{ 00 — Message escape

{ 1 < NCP2 Repeat struct >

< CELL_PARAMS_POINTER : bit (2) > } ** 0 –Up to four pointers to the ‘Neigbour parameter set

< Neighbour parameter set : < Neighbour parameter set struct > > * (1 + max(val(CELL_PARAMS_POINTER)))

! < Message escape: { 01 | 10 | 11 } bit** = < no string >> } ; — Reserved for future use

< NCP2 Repeat struct > ::=

{ 1 < START_FREQUENCY : bit (10) > — Multiple START FREQ/FREQ DIFF sets may be defined

< NCP2 Property struct >

{ < NR_OF_REMAINING_CELLS : { bit (4) – 0000 } >

< FREQ_DIFF_LENGTH : bit (3) >

{ < FREQUENCY_DIFF : bit (1 + val(FREQ_DIFF_LENGTH)) >

< NCP2 Property struct > } * (val(NR_OF_REMAINING_CELLS))

< NCP2 Repeat struct > — Repeated recursively

| 0000 } — Break recursion (NR_OF_REMAINING_CELLS == 0)

| 0 } ; — End recursion (no more START_FREQUENCY)

< NCP2 Property struct > ::=

< SAME_RA_AS_SERVING_CELL : bit (1) >

< CELL_BAR_ACCESS_2 : bit >

< BCC : bit (3) > ;

< Neighbour parameter set struct > ::=.

{ 0 | 1 < NCC : bit (3) > }

< EXC_ACC : bit >

{ 0 | 1 < GPRS_RXLEV_ACCESS_MIN : bit (6) > }

{ 0 | 1 < GPRS_MS_TXPWR_MAX_CCH : bit (5) > }

{ 0 | 1 < PRIORITY_CLASS : bit (3) > }

{ 0 | 1 < HCS_THR : bit (5) >}

{ 0 | 1 < SI13_PBCCH_LOCATION : < SI13_PBCCH_LOCATION struct > > }

< GPRS_TEMPORARY_OFFSET : bit (3) >

< GPRS_PENALTY_TIME : bit (5) >

< GPRS_RESELECT_OFFSET : bit (5) > ;

< COMPACT Neighbour Cell params 2 struct > ::=

{ 00 — Message escape

{ 1 < COMPACT NCP2 Repeat struct >

< CELL_PARAMS_POINTER : bit (2) > } ** 0 — Up to four pointers to the ‘C Neighbour parameter set’

< COMPACT Neighbour parameter set :
<COMPACT Neighbour parameter set struct > > * (1+ max(val(CELL_PARAMS_POINTER)))

! < Message escape: { 01 | 10 | 11 } bit** = < no string >> } ; — Reserved for future use

< COMPACT NCP2 Repeat struct > ::=

{ 1 < START_FREQUENCY : bit (10) > — Multiple START FREQ/FREQ DIFF sets may be defined

< COMPACT NCP2 Property struct >

{ < NR_OF_REMAINING_CELLS : { bit (4) – 0000 } >

< FREQ_DIFF_LENGTH : bit (3) >

{ < FREQUENCY_DIFF : bit (1 + val(FREQ_DIFF_LENGTH)) >

< COMPACT NCP2 Property struct > } * (val(NR_OF_REMAINING_CELLS))

< COMPACT NCP2 Repeat struct > — Repeated recursively

| 0000 } — Break recursion (NR_OF_REMAINING_CELLS == 0)

| 0 } ; — End recursion (no more START_FREQUENCY)

< COMPACT NCP2 Property struct > ::=

< SAME_RA_AS_SERVING_CELL : bit (1) >

< CELL_BAR_ACCESS_2 : bit >

< BCC : bit (3) > 

{ 0 | 1 < TIME_GROUP : bit (2) > };

< COMPACT Neighbour parameter set struct > ::=

{ 0 | 1 < NCC : bit (3) > }

< EXC_ACC : bit >

{ 0 | 1 < GPRS_RXLEV_ACCESS_MIN : bit (6) > }

{ 0 | 1 < GPRS_MS_TXPWR_MAX_CCH : bit (5) > }

{ 0 | 1 < GPRS_PRIORITY_CLASS : bit (3) > }

{ 0 | 1 < GPRS_HCS_THR : bit (5) > }

< GPRS_TEMPORARY_OFFSET : bit (3) >

< GPRS_PENALTY_TIME : bit (5) >

< GPRS_RESELECT_OFFSET : bit (5) >

{ 0 | 1 < GUAR_CONSTANT_PWR_BLKS : bit (2) > } ;

< CCN Support Description struct > ::=
< Number_Cells : bit (7) >
{ CCN_SUPPORTED : bit } * (val(Number_Cells)) ;

< Iu mode neighbour cell params struct > ::=

< NR_OF_REMAINING_CELLS : bit (4) >

{ 0 | 1 < Iu Mode Cell Selection Params : <Iu Mode Cell Selection struct >> } * (val(NR_OF_REMAINING_CELLS));

< Iu Mode Cell Selection struct > ::=

< CELL BAR QUALIFY 3 : bit (2) >

{ 0 | 1 < SI13Alt PBCCH Location: < SI13 PBCCH Location struct > > };

< Iu mode Only Neighbour Cell params struct > ::=

< START_FREQUENCY : bit (10) >

< Iu mode Only Cell selection params : < Iu mode Only Cell Selection struct > >

< NR_OF_REMAINING_CELLS : bit (4) >

< FREQ_DIFF_LENGTH : bit (3) >

{ < FREQUENCY_DIFF : bit (1 + val(FREQ_DIFF_LENGTH)) >

< Iu mode Only Cell Selection params :

< Iu mode Only Cell Selection struct > > } * (val(NR_OF_REMAINING_CELLS));

< Iu Mode Only Cell Selection struct > ::=

< BSIC : bit (6) >

< CELL BAR QUALIFY 3 : bit (2) >

< SAME_RA_AS_SERVING_CELL : bit (1) >

{ 0 | 1 < GPRS_RXLEV_ACCESS_MIN : bit (6) >

< GPRS_MS_TXPWR_MAX_CCH : bit (5) > }

{ 0 | 1 < GPRS_TEMPORARY_OFFSET : bit (3) >

< GPRS_PENALTY_TIME : bit (5) }

{ 0 | 1 < GPRS_RESELECT_OFFSET : bit (5) > }

{ 0 | 1 < HCS params : < HCS struct > > }

{ 0 | 1 < SI13Alt PBCCH Location : < SI13 PBCCH Location struct > >};

General rules for handling neighbour cell parameter default values

The first neighbour cell defined in the first PSI3bis instance uses as its default parameter values the parameter values defined for the last neighbour cell in PSI3.
The following neighbour cells in PSI3bis use the parameter values of the previous neighbour cell as their default values.

This principle of referring to the previous cell applies independently of the coding used in PSI3bis (Neighbour cell parameters, Neighbour cell parameters 2 and COMPACT Neighbour Cell Parameters).

This principle also applies when going from PSI3bis instance i over to PSI3bis instance i+1.

Neighbour cell params struct
The coding of the Neighbour cell parameters is described under PSI3.

Neighbour cell params 2 struct
This coding may be used if the number of neighbour cells is high and many cells share common parameter values. The structure contains pointers to the list of sets of actual parameters. The coding of actual parameters that are contained in or referenced by the Neighbour Cell params 2 struct is described in PSI3.

COMPACT Neighbour Cell params struct
The coding of the Neighbour cell parameters is the same as the coding of the Neighbour cell params struct 2, except the two additional parameters, TIME_GROUP and GUAR_CONSTANT_PWR_BLKS. The coding of actual parameters that are contained in or referenced by the COMPACT Neighbour Cell params struct is described in PSI3.

The following parameters (CELL_PARAMS_POINTER, BCC and NCC) are not defined in PSI3:

CELL_PARAMS_POINTER (2 bit field)
Pointer to the parameter set valid for a certain cell group (up to four).

BCC (3 bit field)
BTS Colour Code.

Neighbour parameter set struct and COMPACT Neighbour parameter set struct
The actual parameter values for the Neighbour Cell params 2 struct and the COMPACT Neighbour Cell params struct are given is these structures. Default values for absent parameters are defined according to the general rule given above, except:

NCC : bit (3). Network Colour Code. The default value is given by the serving cell.

LSA Parameters IE
The LSA Parameters IE is described under PSI3 and in sub-clause 12.28.

CCN Support Description

CCN_SUPPORTED (1 bit field)
This parameter is used for determining whether the mobile station shall enter CCN mode when re-selecting a cell and CCN is enabled. The use of these bits is described in sub-clause 8.8.2a:
Bit
0 CCN is enabled towards the corresponding cell
1 CCN is disabled towards the corresponding cell

CELL BAR QUALIFY 3 (2 bit field)

This information element is defined in 3GPP TS 44.018.

Iu mode Neighbour Cell params struct

This struct presents supplementary information for Iu mode capable cells. The struct may be included in this message and assigns Iu mode parameter values to the neighbouring cells defined by the message. Iu mode capable neighbouring cells may be defined by the Neighbour Cell parameters and the Neighbour Cell parameters 2 IEs. The Iu mode Neighbour Cell params struct values are assigned to the neighbouring cells in the same order they appear in the PSI3 and PSI3bis messages.