12.5a EGPRS2
3GPP44.060General Packet Radio Service (GPRS)Mobile Station (MS) - Base Station System (BSS) interfaceRadio Link Control / Medium Access Control (RLC/MAC) protocolRelease 17TS
12.5a.1 EGPRS Channel Quality Report Type 2
The EGPRS2 Channel Quality Report Type 2 Information Element is defined in tables 12.5a.1.1 and 12.5a.1.2. The information to be included within this IE depends on the setting of the ES/P field or CES/P field (see sub-clause 9.1.8.2.1) and on the most recently received LINK_QUALITY_MEASUREMENT_MODE field (see sub-clause 11.2.7).
Table 12.5a.1.1 : EGPRS Channel Quality Report Type 2 Information elements
< EGPRS Channel Quality Report Type 2 IE> ::= < EGPRS BEP Link Quality Measurements Type 2 : < EGPRS BEP Link Quality Measurements Type 2 IE>> < C_VALUE : bit (6) > < EGPRS Timeslot Link Quality Measurements Type 2 : <EGPRS Timeslot Link Quality Measurements Type 2 IE >> ; |
Table 12.5a.1.2 : EGPRS Channel Quality Report Type 2 Information Elements details
EGPRS BEP Link Quality Measurements Type 2 EGPRS Timeslot Link Quality Measurements Type 2 This information element is defined in sub-clause 12.5a.3. C_VALUE (6 bits) |
12.5a.2 EGPRS BEP Link Quality Measurements Type 2 IE
The EGPRS BEP Link Quality measurements Type 2 IE is defined in tables 12.5a.2.1 and 12.5a.2.2. In the case of dual carrier configurations, "all timeslots in the TBF" shall refer only to those timeslots on the carrier to which this IE relates.
Table 12.5a.2.1: EGPRS BEP Link Quality Measurements Type 2 Information elements
<EGPRS BEP Link Quality Measurements Type 2 IE> ::= { 0 | 1 < GMSK_MEAN_BEP : bit (5) > < GMSK_CV_BEP : bit (3) >} { 0 | 1 < 8PSK_MEAN_BEP : bit (5) > < 8PSK_CV_BEP : bit (3) > } { 0 | 1 < QPSK_MEAN_BEP : bit (5) > < QPSK_CV_BEP : bit (3) > } { 0 | 1 < 16QAM_ NSR_MEAN_BEP : bit (5) > < 16QAM_ NSR_CV_BEP : bit (3) > } { 0 | 1 < 32QAM_ NSR_MEAN_BEP : bit (5) > < 32QAM_ NSR_CV_BEP : bit (3) > } { 0 | 1 < 16QAM_HSR_MEAN_BEP : bit (5) > < 16QAM_HSR_CV_BEP : bit (3) > } { 0 | 1 < 32QAM_HSR_MEAN_BEP : bit (5) > < 32QAM_HSR_CV_BEP : bit (3) > }; |
Table 12.5a.2.2 : EGPRS BEP Link Quality Measurements Type 2 Information Elements details
GMSK_MEAN_BEP (5 bit field) These fields contain the mean value of the Bit Error Probability of the channel averaged over all timeslots in the TBF for the relevant modulation scheme, refer to 3GPP TS 45.008. |
GMSK_CV_BEP (3 bit field) |
12.5a.3 EGPRS Timeslot Link Quality Measurements Type 2 IE
The EGPRS Timeslot Link Quality Measurements Type 2 IE is defined in tables 12.5a.3.1 and 12.5a.3.
Table 12.5a.3.1: EGPRS Timeslot Link Quality Measurements Type 2 Information elements
<EGPRS Timeslot Link Quality Measurements Type 2 IE> ::= { 0 | 1 < BEP_MEASUREMENTS : BEP Measurement Report Struct >} { 0 | 1 < INTERFERENCE_MEASUREMENTS : Interference Measurement Report Struct >}; |
< BEP Measurement Report Struct > ::= { 0 | 1 <REPORTED_MODULATION : bit (2) > <MEAN_BEP_TN0 : bit (4) > } { 0 | 1 < REPORTED_MODULATION : bit (2) > <MEAN_BEP_TN1 : bit (4) > } { 0 | 1 < REPORTED_MODULATION : bit (2) > <MEAN_BEP_TN2 : bit (4) > } { 0 | 1 < REPORTED_MODULATION : bit (2) > <MEAN_BEP_TN3 : bit (4) > } { 0 | 1 < REPORTED_MODULATION : bit (2) > <MEAN_BEP_TN4 : bit (4) > } { 0 | 1 < REPORTED_MODULATION : bit (2) > <MEAN_BEP_TN5 : bit (4) > } { 0 | 1 < REPORTED_MODULATION : bit (2) > <MEAN_BEP_TN6 : bit (4) > } { 0 | 1 < REPORTED_MODULATION : bit (2) > <MEAN_BEP_TN7 : bit (4) > }; |
< Interference Measurement Report Struct > ::= { 0 | 1 < I_LEVEL_TN0 : bit (4) > } { 0 | 1 < I_LEVEL_TN1 : bit (4) > } { 0 | 1 < I_LEVEL_TN2 : bit (4) > } { 0 | 1 < I_LEVEL_TN3 : bit (4) > } { 0 | 1 < I_LEVEL_TN4 : bit (4) > } { 0 | 1 < I_LEVEL_TN5 : bit (4) > } { 0 | 1 < I_LEVEL_TN6 : bit (4) > } { 0 | 1 < I_LEVEL_TN7 : bit (4) > }; |
Table 12.5a.3.2: EGPRS Timeslot Link Quality Measurements Type 2 Information Elements details
MEAN_BEP_TN0 (4 bit field) These fields contain the mean bit error probability value calculated on timeslots 0 through 7 for the modulation scheme as indicated using the REPORTED_MODULATION field, see below. For the calculation of the mean bit error probability, refer to 3GPP TS 45.008. These fields are transferred only when the mobile station is in packet transfer mode. In RTTI configuration, the mean bit error probability value calculated on per timeslot pair shall be reported on MODULATION_1 _MEAN_BEP_TNx /MODULATION_2 _MEAN_BEP_TNx where TNx is the lower numbered timeslot of each reported timeslot pair. |
I_LEVEL_TN0 (4 bit field) I_LEVEL_TN1 (4 bit field) I_LEVEL_TN2 (4 bit field) I_LEVEL_TN3 (4 bit field) I_LEVEL_TN4 (4 bit field) I_LEVEL_TN5 (4 bit field) I_LEVEL_TN6 (4 bit field) I_LEVEL_TN7 (4 bit field) These fields contain the value calculated on timeslots 0 through 7, respectively. The value is defined in 3GPP TS 45.008. These fields are encoded relative to C_VALUE as defined for the mapping defined in 3GPP TS 45.008 for interference level (I_LEVEL): bit 4 3 2 1 0 0 0 0 I_LEVEL 0 0 0 0 1 I_LEVEL 1 … 1 1 1 0 I_LEVEL 14 1 1 1 1 I_LEVEL 15 |
REPORTED_MODULATION (2 bit field) The mobile station shall, for each of its currently assigned timeslots, report the modulation scheme (indicated using the REPORTED_MODULATION field) with which it has received the largest number of blocks since the last report and shall report the MEAN_BEP_TNx of that modulation scheme (see the section 10.2.3.2.3 in 3GPP TS 45.008). The mapping of the modulation scheme is as follows. For EGPRS2-A: bit 2 1 0 0 GMSK 0 1 8PSK 1 0 16QAM 1 1 32QAM For EGPRS2-B: bit 2 1 0 0 GMSK 0 1 QPSK 1 0 16QAM with higher symbol rate 1 1 32QAM with higher symbol rate In case of EGPRS2-B, if there are any received radio blocks with 8PSK, 16QAM with normal symbol rate or 32QAM with normal symbol rate, those radio blocks shall be ignored for channel quality reporting on that timeslot. |