< MBMS Neighbouring Cell Report struct > ::=

{ 0 < BA_USED : bit (1) >

| 1 < PSI3_CHANGE_MARK : bit (2) > }

< Neighbouring Cell Report : < Neighbouring Cell Report struct > >;

< Neighbouring Cell Report struct > ::=

< RXLEV_SERVING_CELL : bit (6) > — Serving cell Rx level

< RESEL_CRITERIA_FULFILLED : bit (1) > — If re-selection criteria are fulfilled, only the

— corresponding neighbouring cell is reported

< NUMBER_OF_NEIGHBOURING_CELL_MEASUREMENTS : bit (3) >

{ < NCELL_LIST_INDEX_N : bit (7) > — Neighbouring cells Rx levels

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

< RXLEV_N : bit (6) >

< RESEL_PARAMS_ACQUIRED : bit (1) >

{ 0 — No ptm parameters acquired for that session

— in that cell

| 1 < MBMS_PTM_CHANGE_MARK : bit (2) > } — Ptm parameters acquired for that session in

— that cell

} * val (NUMBER_OF_NEIGHBOURING CELL_MEASUREMENTS) ;

MS_ID Release Indication (1 bit field)
This field is used by the mobile station to notify the network of the release of the MS_ID, for the MBMS radio bearer the message relates to, on the mobile station side.

0 The MS_ID is not released on the mobile station side

1 The MS_ID is released on the mobile station side

Extension Bits
This information element, if present, shall be skipped over. Any information content shall be ignored by the network. This information element is defined in sub-clause 12.26.

Ack/Nack Description IE
This information element is defined in sub-clause 12.3.

MS OUT OF MEMORY (1 bit field)
This field indicates that the MS has no more enough memory to perform Incremental Redundancy.

0 The MS has enough memory
1 The MS is running out of memory

EGPRS Ack/Nack Description IE (L bit field)
This information element is defined in sub-clause 12.3.1. The number of bits (L) available for Ack/Nack Description information element may depend on the number of neighbouring cell measurements included (see sub-clause 9.1.8.2.1). L shall be set so that the entire MBMS Downlink Ack/Nack message evenly fits into an RLC/MAC control block. If a lower L covers the entire receive window, that L shall be used.

BA_USED (1 bit field)
PSI3_CHANGE_MARK (2 bit field)
These fields shall contain the value of BA_IND and PSI3_CHANGE_MARK respectively in the message defining the used Neighbour Cell List.

In case PBCCH exists, PSI3_CHANGE_MARK shall be used.
In case PBCCH does not exist, BA_USED shall be used.

RXLEV_SERVING_CELL (6 bit field)
This field contains the value of the RXLEV parameter for the serving cell calculated by the mobile station (see 3GPP TS 45.008). This field is encoded.as the binary representation of the RXLEV parameter value defined in 3GPP TS 45.008.
Range 0 to 63.

Neighbouring cell reporting

The reporting of neighbouring cell measurement results is done in decreasing order of the corresponding cell re-selection ranking, as described in sub-clause 5.6.4. In case cell re-selection criteria are fulfilled, only the measurement results for the corresponding neighbouring cell are included and no other measurement results for any other neighbouring cell are included.

RESEL_CRITERIA_FULFILLED (1 bit field)
This field indicates whether cell re-selection criteria are fulfilled.

Bit
0 Cell re-selection criteria are not fulfilled
1. Cell re-selection criteria are fulfilled

NUMBER_OF_NEIGHBOURING_CELL_MEASUREMENTS (3 bit field)
This field is encoded as the binary representation of the amount of neighbouring cells reported.

Bit
3 2 1
0 0 0 0
… …
1 0 1 5
1 1 x 6

NCELL_LIST_INDEX_N (7 bit field)
This field contains the index of the GSM Neighbour Cell list, see sub-clause 5.6.3.2. As an exception, if PBCCH is not present in the cell and the MS has not acquired the complete GSM Neighbour Cell list from the BCCH messages, this field shall refer to the BA(BCCH) list.

BSIC_N (6 bit field)
This field indicates the BSIC of the frequency upon which the measurement was made. This field shall be included only for frequencies that refer to the BA(BCCH) list. The field is encoded as the BSIC value defined in 3GPP TS 44.018.
Range 0 to 63

RXLEV_N (6 bit field)
This field indicates the measured RXLEV of the frequency upon which the measurement was made (see 3GPP TS 45.008). This field is encoded as the RXLEV value defined in 3GPP TS 44.018.
Range 0 to 63

RESEL_PARAMS_ACQUIRED (1 bit field)
This field indicates whether the mobile station has received the re-selection parameters for the reported neighbouring cell.

Bit
0 No re-selection parameters received for this neighbouring cell
1 Re-selection parameters received for this neighbouring cell

MBMS_PTM_CHANGE_MARK (2 bit field)
This field shall contain the value of the MBMS_PTM_CHANGE_MARK field in the latest MBMS NEIGHBOURING CELL INFORMATION message received by the mobile station for that MBMS session and that reported neighbouring cell. If no such MBMS_PTM_CHANGE_MARK is available, it shall not be included in the MBMS DOWNLINK ACK/NACK message.