Jinzzz
2015-08-11, 08:15 PM
Hi
I am trying to understand the Data Activity which UE performing when on 2G which prevents it from reselecting to 3G. Because we are testing Voice Calls, the next call setup gets initiated before UE reselects to 3G. But when Fast Return to WCDMA is enabled UE reselects to 3G but when it is not and UE is dependent on Sib Type2 Quater Message, it keeps on doing Data Activity. By looking at the messages, I cannot make sense what is it actually doing? If it is some background Apps on the phone or something else. Would be grateful if someone can help
This is DL "Packet Uplink Ack/Nack" message on GSM RLC/MAC Layer
10:26:26.816 GSM RLC/MAC Message
{
Direction: DL
Message Type: Packet Uplink Ack/Nack
Message Content
{
PAGE MODE : 0 --> Normal paging
UPLINK_TFI : 31
EGPRS Channel Coding Command
{
EGPRS Modulation and Coding Scheme : 5 --> MCS-6
}
RESEGMENT : 0 --> Retransmitted RLC data blocks shall not be re-segmented
PRE_EMPTIVE_TRANSMISSION : 1 --> MS shall use pre-emptive transmission.
PRR RETRANSMISSION REQUEST : 0 --> not requested
ARAC RETRANSMISSION REQUEST : 0 --> Not requested
TBF_EST : 0 --> MS is not allowed to request the establishment of new TBF
Power Control Parameters
{
ALPHA : 6 --> a = 0.6
GAMMA_TN6 : 14 (Actual value: Gamma_CH= 28 dB)
}
EGPRS Ack/Nack Description
{
length : 15
EGPRS Ack/Nack Description struct
{
FINAL_ACK_INDICATION : 0 --> retransmission are requested and the TBF is incomplete
BEGINNING_OF_WINDOW : 1 --> the reported bitmap covers V(Q)
END_OF_WINDOW : 1 --> [V(R) - 1] modulo SNS is included in the bitmap.
STARTING_SEQUENCE_NUMBER : 45
}
}
}
Message Hex Dump:
{
00 24 3F 15 02 C0 5C 43 D8 2D
0B
}
}
Then UE sends EGPRS Packet Downlink Ack/Nack
10:26:26.816 GSM RLC/MAC Message
{
Direction: UL
Message Type: EGPRS Packet Downlink Ack/Nack
Message Content
{
DOWNLINK_TFI : 29
MS OUT OF MEMORY : 0 --> The MS has enough memory
EGPRS Channel Quality Report
{
EGPRS BEP Link Quality Measurements
{
8PSK_MEAN_BEP : 26
8PSK_CV_BEP : 6
}
C_VALUE : 47
EGPRS Timeslot Link Quality Measurements
}
EGPRS Ack/Nack Description
{
length : 15
EGPRS Ack/Nack Description struct
{
FINAL_ACK_INDICATION : 0 --> retransmission are requested and the TBF is incomplete
BEGINNING_OF_WINDOW : 1 --> the reported bitmap covers V(Q)
END_OF_WINDOW : 1 --> [V(R) - 1] modulo SNS is included in the bitmap.
STARTING_SEQUENCE_NUMBER : 90
}
}
padding bits :
}
Message Hex Dump:
{
00 23 AB AD 78 21 EC 2D 0B 2B
2B 2B 2B 2B 2B 2B 2B 2B 2B 2B
2B 2B 2B
}
}
Thanks
I am trying to understand the Data Activity which UE performing when on 2G which prevents it from reselecting to 3G. Because we are testing Voice Calls, the next call setup gets initiated before UE reselects to 3G. But when Fast Return to WCDMA is enabled UE reselects to 3G but when it is not and UE is dependent on Sib Type2 Quater Message, it keeps on doing Data Activity. By looking at the messages, I cannot make sense what is it actually doing? If it is some background Apps on the phone or something else. Would be grateful if someone can help
This is DL "Packet Uplink Ack/Nack" message on GSM RLC/MAC Layer
10:26:26.816 GSM RLC/MAC Message
{
Direction: DL
Message Type: Packet Uplink Ack/Nack
Message Content
{
PAGE MODE : 0 --> Normal paging
UPLINK_TFI : 31
EGPRS Channel Coding Command
{
EGPRS Modulation and Coding Scheme : 5 --> MCS-6
}
RESEGMENT : 0 --> Retransmitted RLC data blocks shall not be re-segmented
PRE_EMPTIVE_TRANSMISSION : 1 --> MS shall use pre-emptive transmission.
PRR RETRANSMISSION REQUEST : 0 --> not requested
ARAC RETRANSMISSION REQUEST : 0 --> Not requested
TBF_EST : 0 --> MS is not allowed to request the establishment of new TBF
Power Control Parameters
{
ALPHA : 6 --> a = 0.6
GAMMA_TN6 : 14 (Actual value: Gamma_CH= 28 dB)
}
EGPRS Ack/Nack Description
{
length : 15
EGPRS Ack/Nack Description struct
{
FINAL_ACK_INDICATION : 0 --> retransmission are requested and the TBF is incomplete
BEGINNING_OF_WINDOW : 1 --> the reported bitmap covers V(Q)
END_OF_WINDOW : 1 --> [V(R) - 1] modulo SNS is included in the bitmap.
STARTING_SEQUENCE_NUMBER : 45
}
}
}
Message Hex Dump:
{
00 24 3F 15 02 C0 5C 43 D8 2D
0B
}
}
Then UE sends EGPRS Packet Downlink Ack/Nack
10:26:26.816 GSM RLC/MAC Message
{
Direction: UL
Message Type: EGPRS Packet Downlink Ack/Nack
Message Content
{
DOWNLINK_TFI : 29
MS OUT OF MEMORY : 0 --> The MS has enough memory
EGPRS Channel Quality Report
{
EGPRS BEP Link Quality Measurements
{
8PSK_MEAN_BEP : 26
8PSK_CV_BEP : 6
}
C_VALUE : 47
EGPRS Timeslot Link Quality Measurements
}
EGPRS Ack/Nack Description
{
length : 15
EGPRS Ack/Nack Description struct
{
FINAL_ACK_INDICATION : 0 --> retransmission are requested and the TBF is incomplete
BEGINNING_OF_WINDOW : 1 --> the reported bitmap covers V(Q)
END_OF_WINDOW : 1 --> [V(R) - 1] modulo SNS is included in the bitmap.
STARTING_SEQUENCE_NUMBER : 90
}
}
padding bits :
}
Message Hex Dump:
{
00 23 AB AD 78 21 EC 2D 0B 2B
2B 2B 2B 2B 2B 2B 2B 2B 2B 2B
2B 2B 2B
}
}
Thanks