2024年2月13日发(作者：秦易真)
阿尔卡特B7版本中GPRS信令流程及时延分析
阿尔卡特B7版本中， GPRS方面增加了DL TBF延迟释放和UL TBF
Final Ack延迟发送的功能，加快了TBF建立的时间。另外，在参数设置上，我们将TBF_Init_CS从CS1调整到CS2，加快了空中接口数据传送速率。所以，在新的版本中，PING时延、WAP时延、Attach和PDP激活时延等较B6均有不同程度的缩短。
但是，我们也看到，即便如此，我们在一些方面，一些特定情况下的时延仍比我们的竞争对手（如爱立信、诺基亚等）长了很多。
下文中给出了阿尔卡特B7版本GPRS的一些主要信令流程，并对各信令阶段的时延进行了统计。
由于时间仓促，数据样本不多，而且关于手机方面的处理时延均为推测，所以统计数据可能有一定偏差，仅供参考。
在以下的分析中，我们可以看到，在各信令流程中，TBF的建立和准备均占到总时长的一半或一半以上。（除了500Byte连续PING。）所以，缩短TBF的建立和准备时间，特别是在CCCH上建立UL TBF的建立和准备时间，是缩短阿尔卡特GPRS个流程时长的关键所在。
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一、 阿尔科特B7版本GPRS主要信令流程时延：
信令流程
500Byte PING
（首PING，包括PDCH建立）
500Byte PING
（首PING，不包括PDCH建立）
500Byte PING
（连续PING中的非首PING）
GPRS Attach
（包括Identification，
包括PDCH建立）
GPRS Attach
（包括Identification，
不包括PDCH建立）
GPRS Attach
（包括Auth&Ciph，
包括PDCH建立）
GPRS Attach
（包括Auth&Ciph，
不包括PDCH建立）
GPRS Attach
（不包括Auth&Ciph，
包括PDCH建立）
GPRS Attach
（不包括Auth&Ciph，
不包括PDCH建立）
PDP激活
（包括PDCH建立）
PDP激活
（不包括PDCH建立）
WAP
（包括PDP激活，
包括PDCH建立）
WAP
（包括PDP激活，
不包括PDCH建立）
总时间
ms
2030~
2150
1660~
1780
1330~
1530
？
TBF建
立时间
ms
960~
1080
590~
710
320~
520
？
数据传
送时间
ms
640
640
580
？
核心网
回应时间
ms
30
30
30
？
手机或PC
处理时间
ms
400
400
400
？
？
2150~
2470
1780~
2100
1080~
1200
710~
830
1090~
1210
720~
840
6120~
7040
5750~
6670
？
1280~
1600
910~
1230
960~
1080
590~
710
960~
1080
590~
710
2380~
3300
2010~
2930
？ ？ ？
150 20 700
150 20 700
105 15 ----
105
105
105
985
15
25
25
615
----
----
----
2140
985 615 2140
ASB BU2 MNO (Radio Network Optimization)
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二、 阿尔科特B7版本GPRS信令流程各阶段时延：
TBF建立/准备时间
上行TBF准备时间
根据[GSM TS04.08]， Channel
660~780ms
Request消息上发时延为[0~Max(T,8)-1]个RACH时隙。假设Tx_Integer=25，则对应290~410ms
0~120ms
DL TBF Delay时，手机每200ms发240~440ms
送一次PDAN
从手机应用层数据准备完毕到空中接？
口RLC/MAC层开始上传数据的时间
下行TBF准备时间
？
通过Paging
？
通过Paging
？
通过Immediately Assignment
300ms
即从MFS收到Gb口数据到空中接口80ms
RLC/MAC层开始下传数据的时间
数据传送时间
与以下因素有关：
1） 数据包的大小；
2） TBF分配到的时隙数；
3） CS方式；
4） 是否与其它TBF共用PDCH
核心网处理时间
PING回应
Attach Request回应
PDP激活
WAP（GetReply）
PING
计算SRES（Attach流程）
准备Connect上发（WAP）
30ms
10~15ms
25ms
530ms
手机/终端处理时间
400ms
700ms
1300ms
在CCCH上建立UL TBF
（包括PDCH建立）
在CCCH上建立UL TBF
（不包括PDCH建立）
在DL TBF上建立UL TBF
（DL TBF Delay阶段）
在已有的UL TBF上传送数据
在DRX阶段建立DL TBF
在Non-DRX阶段建立DL TBF
在T3912阶段建立DL TBF
在UL TBF上建立DL TBF
在已有的DL TBF上传送数据
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三、 阿尔科特B7版本GPRS信令流程：
500BYTES PING SCENARIO(First PING, with PDCH Establishment, B7)MSBCCHChannel Request1)0~120msChannel RequiredChannel Request2) 5ms30ms7msUL
TBF
Establish
Time662~782msMS&PC200msDL
DataTransfer160msDL
TBF
300msCNReplyTime32msUL
DataTransfer480msBTSBSCMFSCN200msMS&PC200msRACHRadio Alloc. Alloc. Conf.70msAGCHTM Alloc. Req.8msTM Alloc. Conf.190msChannel Ass. ULImm. Ass. CommandImm. AssignmentPacket UL Dummy Control Block (with TLLI)110ms32ms210msDATAPDCHULTBFPacket DL Assignment(Echo Request)23Blocks = 11CS1_Blks + 12CS2_BlksEcho Request(LLC:538Bytes)Echo Reply(LLC:538Bytes)460ms20ms32ms80ms136msAccess BurstPacket Power Control / (Echo Reply)18CS2_Blks140ms3) 20ms200msNote 1) Channel Request Delay——[GSM TS04.08] the number of slots belonging to the mobile station's RACH betweeninitiation of the immediate assignment procedure and the first CHANNEL REQUEST message (excluding the slotcontaining the message itself) is a random value drawn randomly for each new initial assignment initiation withuniform probability distribution in the set {0, 1, ..., max (T,8) - 1}, where T stands for Tx_Integer. AssumingTx_Integer=25, corresponding time delay will be 0~ 2) Transmission time for Channel Request message on Um 3) Transmission time for last DL DATA on Um 4) Considering the PC delay for COM-port data transmission and receiving, and also the SW time consumptions,which is totally about 400ms,
the GLOBAL TIME DELAY for FIRST PING WITH PDCH ESTABLISHMENT willbe 2030ms to 2150ms.
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500BYTES PING SCENARIO(First PING, without PDCH Establishment, B7)MSBTSBSCMFSCN200msMS&PC200msMS&PC200msDL
DataTransfer160msDL
TBF
300msCNReplyTime32msUL
DataTransfer480msUL
TBF
Establish
Time289~409msBCCH1)0~120msChannel RequestRACHChannel RequiredChannel Request2) 5ms30ms12ms32msAGCHImm. Ass. CommandImm. AssignmentChannel Ass. UL210msPacket UL Dummy Control Block (with TLLI)PDCHULTBFDATA(Echo Request)23Blocks = 11CS1_Blks + 12CS2_BlksEcho Request(LLC:538Bytes)Echo Reply(LLC:538Bytes)Packet DL Assignment460ms20ms32ms80ms136msAccess BurstPacket Power Control / (Echo Reply)18CS2_Blks140ms3) 20ms200msNote 1) Channel Request Delay——[GSM TS04.08] the number of slots belonging to the mobile station's RACH betweeninitiation of the immediate assignment procedure and the first CHANNEL REQUEST message (excluding the slotcontaining the message itself) is a random value drawn randomly for each new initial assignment initiation withuniform probability distribution in the set {0, 1, ..., max (T,8) - 1}, where T stands for Tx_Integer. AssumingTx_Integer=25, corresponding time delay will be 0~ 2) Transmission time for Channel Request message on Um 3) Transmission time for last DL DATA on Um 4) Considering the PC delay for COM-port data transmission and receiving, and also the SW time consumptions,which is totally about 400ms,
the GLOBAL TIME DELAY for FIRST PING WITHOUT PDCH ESTABLISHMENTwill be 1660ms to 1780ms.
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500BYTES PING SCENARIO(Consecutive PING, with Delayed DL TBF Release, B7)MSPDCHDLTBF(oflastPING)PDCHULTBFBTSBSCMFSCN200msPacket DL Data Ack/Nack (Channel Request)1)0~200msPacket UL Assignment85msPacket UL Dummy Control Block (with TLLI)155msDATA(Echo Request)18CS2_BlksEcho Request(LLC:538Bytes)Echo Reply(LLC:538Bytes)2) 400ms20ms32ms3) 80msDATA(Echo Reply)18CS2_Blks140ms4) Note 1) During the DL TBF delay of last PING, Packet DL Data Ack/Nack is sent by MS every 200ms. Detecting a datatransfer request from upper layer, MS will send Channel Request IE in the next Packet DL Data Ack/Nack message andwait for the UL TBF Assignment from network. Therefore, the delay of sending out channel request in the MS will be0~ 2) The transmission time for UL Data is shorter comparing to the one in First PING, since all of the data istransmitted with CS2 3) DL TBF is already exist and no need to be re-established, therefore, the delay time for DL datatransmitting is shortened to 80msNote 4) Transmission time for last DL DATA on Um 5) Considering the PC delay for COM-port data transmission and receiving, and also the SW time consumptions,which is totally about 400ms,
the GLOBAL TIME DELAY for CONSECUTIVE PING WITH DELAYED DL TBFMS&PC200msDL
DataTransfer160msDLtransPrep80msCNReplyTime32msUL
DataTransfer420msUL
TBF
Establish
Time240~440msMS&PC200msRELEASE will be 1330ms to 1530ms.
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GPRS ATTACH SCENARIO (1 of 2)(with Authentication & Ciphering Procedure, B7)MSBCCHChannel RequestBTSBSCMFSCN1)0~120msRACHChannel RequiredChannel Request2) 5ms30ms3)UL
TBF
Establish
Time662~782msDL
DataTransfer40msDL
TBF
300msCNReplyTime10msUL
DataTransfer65msRadio Alloc. Req.7msRadio Alloc. Conf.70msAGCHTM Alloc. Req.8msTM Alloc. Conf.190msChannel Ass. ULImm. Ass. CommandImm. Assignment110ms32ms210msPacket UL Dummy Control Block (with TLLI)PDCHULTBFDATA(Attach Request)3CS1_BlksAttach Request(LLC:37Bytes)Auth. & Ciph. Req.(LLC:22Bytes)Packet DL Assignment60ms5ms10ms80ms136msAccess BurstPacket Power Control / DATA(Auth. & Ciph. Request)1CS2_Blks20ms20ms(TO BE CONTINUED)Note 1) Channel Request Delay——[GSM TS04.08] the number of slots belonging to the mobile station's RACH betweeninitiation of the immediate assignment procedure and the first CHANNEL REQUEST message (excluding the slotcontaining the message itself) is a random value drawn randomly for each new initial assignment initiation withuniform probability distribution in the set {0, 1, ..., max (T,8) - 1}, where T stands for Tx_Integer. AssumingTx_Integer=25, corresponding time delay will be 0~ 2) Transmission time for Channel Request message on Um 3) If the PDCHs are already exist, and no need to be established, the time delay between Channel Request toChannel Assignment UL on GSL interface will be about 12ms (pls. refer to 500BYTE PING SCENARIO——First PING,without PDCH establishment, B7). In this case, the global delay for the UL TBF establish will be 289~409ms.
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GPRS ATTACH SCENARIO (2 of 2)(with Authentication & Ciphering Procedure, B7)MSBTSBSCMFSCN4)700msSRESPreparing
Time700msUL
DataTransfer25msUL
TBF
Establish
Time240~440msMSPrepTime130msDLDataTransfer20msDLTransPrep80msCNReplyTime12msUL
DataTransfer25msUL
TBF
EstablishTime240~440msPDCHDLTBFPacket DL Data Ack/Nack (Channel Request)5)0~200ms85msPacket UL AssignmentPacket UL Dummy Control Block (with TLLI)155msPDCHULTBFDATA(Auth. & Ciph. Response)1CS2_Blks20msAuth. & Ciph. Resp(LLC:19Bytes)Attach Accept(LLC:30Bytes)5ms12msDATA(Attach Accept)1CS2_Blks6) 80ms20ms130ms0~200msPDCHDLTBFPacket DL Data Ack/Nack (Channel Request)85msPacket UL AssignmentPacket UL Dummy Control Block (with TLLI)155msDATA(Attach Complete)1CS2_Blks20msAttach Complete(LLC:8Bytes)5msASB BU2 MNO (Radio Network Optimization)
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...Note 4) “SRES Preparing Time” is the time that MS calculates SRESNote 5) During the DL TBF delay, Packet DL Data Ack/Nack is sent by MS every 200ms. When MS finished SREScalculation, it will send Channel Request IE in the next Packet DL Data Ack/Nack message and wait for the UL TBFAssignment from network. Therefore, the corresponding delay will be 0~ 6) DL TBF is already exist and no need to be re-established, therefore, the delay time for DL datatransmitting is 7) According to the CMCC GPRS DT/CQT Test Criterion, GPRS Attach Delay is timing from when an Attach Requestis about to be sent in the MS, to an Attach Accept message received by the MS. Considering the delay in Uminterface for the last DL data (Attach Accept), which is about 20ms,
the GLOBAL TIME DELAY for GPRSAttach with PDCH establishment will be 2150ms to 2470ms, while the GLOBAL TIME DELAY forGPRS Attach without PDCH establishment will be 1780ms
8
MOBILE
GPRS ATTACH SCENARIO(without Authentication & Ciphering Procedure, B7)MSBCCHRACHChannel RequestChannel RequiredChannel RequestBTSBSCMFSCN0~120ms5ms30ms7msUL
TBF
Establish
Time662~782msUL
DataTransfer25msUL
TBF
EstablishTime240~440msMSPrepTime130msDL
DataTransfer40msDL
TBF
300msCNReplyTime14msUL
DataTransfer65msRadio Alloc. Alloc. Conf.70msAGCHTM Alloc. Req.8msTM Alloc. Conf.190msChannel Ass. ULImm. Ass. CommandImm. AssignmentPacket UL Dummy Control Block (with TLLI)110ms32ms210msPDCHULTBFDATA(Attach Request)3CS1_BlksAttach Request(LLC:37Bytes)Attach Accept(LLC:30Bytes)Packet DL Assignment60ms5ms14ms80ms136msAccess BurstPacket Power Control / Timing Advance84msDATA(Attach Accept)1CS2_Blks20ms20msPDCHDLTBFPacket DL Data Ack/Nack (Channel Request)130ms0~200msPacket UL Assignment85msPacket UL Dummy Control Block (with TLLI)155msASB BU2 MNO (Radio Network Optimization)
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...Note 1)
The GLOBAL TIME DELAY for GPRS Attach with PDCH establishment will be 1080ms to1200ms, while the GLOBAL TIME DELAY for GPRS Attach without PDCH establishment will be710ms DATA(Attach Complete)1CS2_Blks20msAttach Complete(LLC:8Bytes)5ms
9
MOBILE
PDP CONTEXT ACTIVATION SCENARIO(B7)MSBCCHChannel RequestBTSBSCMFSCN0~120msRACHChannel RequiredChannel Request5ms30msUL
TBF
Establish
Time662~782msDL
DataTransfer40msDL
TBF
300msCNReplyTime23msUL
DataTransfer65msRadio Alloc. Req.7msRadio Alloc. Conf.70msAGCHTM Alloc. Req.8msTM Alloc. Conf.190msChannel Ass. ULImm. Ass. CommandImm. Assignment110ms32ms210msPacket UL Dummy Control Block (with TLLI)PDCHULTBFDATA(Active PDP Context Request)3CS1_BlksAct. PDP Cont. Req(LLC:43Bytes)Act. PDP Cont. Acc(LLC:25Bytes)Packet DL Assignment60ms5ms23ms80ms136msAccess BurstPacket Power Control / DATA(Active PDP Context Accept)1CS2_Blks20ms20msNote 1)
The GLOBAL TIME DELAY for GPRS Attach with PDCH establishment will be 1090ms to1210ms, while the GLOBAL TIME DELAY for GPRS Attach without PDCH establishment will be720ms to 840ms.
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WAP SCENARIO (1 of 4)(with PDP Context Activation, B7)MSBCCHChannel RequestBTSBSCMFSCN0~120msRACHChannel RequiredChannel Request5ms30msUL
TBF
Establish
Time662~782msDL
DataTransfer40msDL
TBF
300msCNReplyTime23msUL
DataTransfer65msRadio Alloc. Req.7msRadio Alloc. Conf.70msAGCHTM Alloc. Req.8msTM Alloc. Conf.190msChannel Ass. ULImm. Ass. CommandImm. Assignment110ms32ms210msPacket UL Dummy Control Block (with TLLI)PDCHULTBFDATA(Active PDP Context Request)3CS1_BlksAct. PDP Cont. Req(LLC:43Bytes)Act. PDP Cont. Acc(LLC:25Bytes)Packet DL Assignment60ms5ms23ms80ms136msAccess BurstPacket Power Control / DATA(Active PDP Context Accept)1CS2_Blks20ms20ms(TO BE CONTINUED)
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WAP SCENARIO (2 of 4)(with PDP Context Activation, B7)MSBTSBSCMFSCN~1300msMS
PrepTime1300msUL
Data
Transfer87msUL
TBF
EstablishTime240~440msDL
DataTransfer80msMSPrepTime320msDL
TBF
EstablishTime300msUL
DataTransfer240msCNReplyTime32msUL
TBF
EstablishTime240~440msPDCHDLTBFPacket DL Data Ack/Nack (Channel Request)0~200msPacket UL Assignment85msPacket UL Dummy Control Block (with TLLI)155msDATA(INVOKE(Connect))10CS2_BlksINVOKE(Connect)(LLC:281Bytes)RESULT(Conn Reply)(LLC:74Bytes)220ms20ms32msPDCHUL TBFPacket DL Assignment80msAccess Burst136msPacket Power Control / Timing Advance84msDATA(RESULT(Connect Reply))Packet DL Data Ack/Nack (Channel Request)20ms320ms0~200msPacket UL Assignment85msPacket UL Dummy Control Block (with TLLI)155msDATA(ACK)2CS2_BlksACK(LLC:41Bytes)80msDATA(INVOKE(Get))2CS2_BlksINVOKE(Get)(LLC:69Bytes)7ms(TO BE CONTINUED)
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WAP SCENARIO (3 of 4)(with PDP Context Activation, B7)MSBTSBSCMFSRESULT(Reply)(LLC:506Bytes+506Bytes+370Btyes)CN530msCNReplyTime530msDL
DataTransfer40msDLtransPrep80msCNReplyTime30msUL
DataTransfer47msUL
TBF
EstablishTime240~440msMSPrepTime400msUL
DataTransfer47msUL
TBF
EstablishTime240~440msMSPrepTime120msDL
DataTransfer340msDLtransPrep80ms80msDATA(RESULT(Reply))47CS2_Blks320ms20msPDCHDLTBFPacket DL Data Ack/Nack (Channel Request)120ms0~200msPacket UL Assignment85msPacket UL Dummy Control Block (with TLLI)155msDATA(ACK)2CS2_BlksACK(LLC:41Bytes)2) 40ms7ms400msPacket DL Data Ack/Nack (Channel Request)0~200msPacket UL Assignment85msPacket UL Dummy Control Block (with TLLI)155msDATA(INVOKE)2CS2_BlksINVOKE(LLC:44Bytes)RESULT(Reply)(LLC:48Bytes)2) 40ms7ms30ms80msDATA(RESULT(Reply))2CS2_Blks20ms20ms(TO BE CONTINUED)Note 1)
The GLOBAL TIME DELAY for GPRS First WAP PAGE with PDCH establishment will be6120ms to 7040ms, while the GLOBAL TIME DELAY for GPRS First WAP PAGE without PDCHestablishment will be 5750ms to 6670ms.
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WAP SCENARIO (4 of 4)(with PDP Context Activation, B7)MSBTSBSCMFSCN100msPacket DL Data Ack/Nack (Channel Request)0~200msPacket UL Assignment85msPacket UL Dummy Control Block (with TLLI)155msDATA(ACK)2CS2_BlksACK(LLC:41Bytes)2) 40ms7msUL
DataTransfer47msUL
TBF
EstablishTime240~440msMSPrepTime100ms
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2024年2月13日发(作者：秦易真)
阿尔卡特B7版本中GPRS信令流程及时延分析
阿尔卡特B7版本中， GPRS方面增加了DL TBF延迟释放和UL TBF
Final Ack延迟发送的功能，加快了TBF建立的时间。另外，在参数设置上，我们将TBF_Init_CS从CS1调整到CS2，加快了空中接口数据传送速率。所以，在新的版本中，PING时延、WAP时延、Attach和PDP激活时延等较B6均有不同程度的缩短。
但是，我们也看到，即便如此，我们在一些方面，一些特定情况下的时延仍比我们的竞争对手（如爱立信、诺基亚等）长了很多。
下文中给出了阿尔卡特B7版本GPRS的一些主要信令流程，并对各信令阶段的时延进行了统计。
由于时间仓促，数据样本不多，而且关于手机方面的处理时延均为推测，所以统计数据可能有一定偏差，仅供参考。
在以下的分析中，我们可以看到，在各信令流程中，TBF的建立和准备均占到总时长的一半或一半以上。（除了500Byte连续PING。）所以，缩短TBF的建立和准备时间，特别是在CCCH上建立UL TBF的建立和准备时间，是缩短阿尔卡特GPRS个流程时长的关键所在。
ASB BU2 MNO (Radio Network Optimization)
ALCATEL SHANGHAI BELL
1
MOBILE
一、 阿尔科特B7版本GPRS主要信令流程时延：
信令流程
500Byte PING
（首PING，包括PDCH建立）
500Byte PING
（首PING，不包括PDCH建立）
500Byte PING
（连续PING中的非首PING）
GPRS Attach
（包括Identification，
包括PDCH建立）
GPRS Attach
（包括Identification，
不包括PDCH建立）
GPRS Attach
（包括Auth&Ciph，
包括PDCH建立）
GPRS Attach
（包括Auth&Ciph，
不包括PDCH建立）
GPRS Attach
（不包括Auth&Ciph，
包括PDCH建立）
GPRS Attach
（不包括Auth&Ciph，
不包括PDCH建立）
PDP激活
（包括PDCH建立）
PDP激活
（不包括PDCH建立）
WAP
（包括PDP激活，
包括PDCH建立）
WAP
（包括PDP激活，
不包括PDCH建立）
总时间
ms
2030~
2150
1660~
1780
1330~
1530
？
TBF建
立时间
ms
960~
1080
590~
710
320~
520
？
数据传
送时间
ms
640
640
580
？
核心网
回应时间
ms
30
30
30
？
手机或PC
处理时间
ms
400
400
400
？
？
2150~
2470
1780~
2100
1080~
1200
710~
830
1090~
1210
720~
840
6120~
7040
5750~
6670
？
1280~
1600
910~
1230
960~
1080
590~
710
960~
1080
590~
710
2380~
3300
2010~
2930
？ ？ ？
150 20 700
150 20 700
105 15 ----
105
105
105
985
15
25
25
615
----
----
----
2140
985 615 2140
ASB BU2 MNO (Radio Network Optimization)
ALCATEL SHANGHAI BELL
2
MOBILE
二、 阿尔科特B7版本GPRS信令流程各阶段时延：
TBF建立/准备时间
上行TBF准备时间
根据[GSM TS04.08]， Channel
660~780ms
Request消息上发时延为[0~Max(T,8)-1]个RACH时隙。假设Tx_Integer=25，则对应290~410ms
0~120ms
DL TBF Delay时，手机每200ms发240~440ms
送一次PDAN
从手机应用层数据准备完毕到空中接？
口RLC/MAC层开始上传数据的时间
下行TBF准备时间
？
通过Paging
？
通过Paging
？
通过Immediately Assignment
300ms
即从MFS收到Gb口数据到空中接口80ms
RLC/MAC层开始下传数据的时间
数据传送时间
与以下因素有关：
1） 数据包的大小；
2） TBF分配到的时隙数；
3） CS方式；
4） 是否与其它TBF共用PDCH
核心网处理时间
PING回应
Attach Request回应
PDP激活
WAP（GetReply）
PING
计算SRES（Attach流程）
准备Connect上发（WAP）
30ms
10~15ms
25ms
530ms
手机/终端处理时间
400ms
700ms
1300ms
在CCCH上建立UL TBF
（包括PDCH建立）
在CCCH上建立UL TBF
（不包括PDCH建立）
在DL TBF上建立UL TBF
（DL TBF Delay阶段）
在已有的UL TBF上传送数据
在DRX阶段建立DL TBF
在Non-DRX阶段建立DL TBF
在T3912阶段建立DL TBF
在UL TBF上建立DL TBF
在已有的DL TBF上传送数据
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三、 阿尔科特B7版本GPRS信令流程：
500BYTES PING SCENARIO(First PING, with PDCH Establishment, B7)MSBCCHChannel Request1)0~120msChannel RequiredChannel Request2) 5ms30ms7msUL
TBF
Establish
Time662~782msMS&PC200msDL
DataTransfer160msDL
TBF
300msCNReplyTime32msUL
DataTransfer480msBTSBSCMFSCN200msMS&PC200msRACHRadio Alloc. Alloc. Conf.70msAGCHTM Alloc. Req.8msTM Alloc. Conf.190msChannel Ass. ULImm. Ass. CommandImm. AssignmentPacket UL Dummy Control Block (with TLLI)110ms32ms210msDATAPDCHULTBFPacket DL Assignment(Echo Request)23Blocks = 11CS1_Blks + 12CS2_BlksEcho Request(LLC:538Bytes)Echo Reply(LLC:538Bytes)460ms20ms32ms80ms136msAccess BurstPacket Power Control / (Echo Reply)18CS2_Blks140ms3) 20ms200msNote 1) Channel Request Delay——[GSM TS04.08] the number of slots belonging to the mobile station's RACH betweeninitiation of the immediate assignment procedure and the first CHANNEL REQUEST message (excluding the slotcontaining the message itself) is a random value drawn randomly for each new initial assignment initiation withuniform probability distribution in the set {0, 1, ..., max (T,8) - 1}, where T stands for Tx_Integer. AssumingTx_Integer=25, corresponding time delay will be 0~ 2) Transmission time for Channel Request message on Um 3) Transmission time for last DL DATA on Um 4) Considering the PC delay for COM-port data transmission and receiving, and also the SW time consumptions,which is totally about 400ms,
the GLOBAL TIME DELAY for FIRST PING WITH PDCH ESTABLISHMENT willbe 2030ms to 2150ms.
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500BYTES PING SCENARIO(First PING, without PDCH Establishment, B7)MSBTSBSCMFSCN200msMS&PC200msMS&PC200msDL
DataTransfer160msDL
TBF
300msCNReplyTime32msUL
DataTransfer480msUL
TBF
Establish
Time289~409msBCCH1)0~120msChannel RequestRACHChannel RequiredChannel Request2) 5ms30ms12ms32msAGCHImm. Ass. CommandImm. AssignmentChannel Ass. UL210msPacket UL Dummy Control Block (with TLLI)PDCHULTBFDATA(Echo Request)23Blocks = 11CS1_Blks + 12CS2_BlksEcho Request(LLC:538Bytes)Echo Reply(LLC:538Bytes)Packet DL Assignment460ms20ms32ms80ms136msAccess BurstPacket Power Control / (Echo Reply)18CS2_Blks140ms3) 20ms200msNote 1) Channel Request Delay——[GSM TS04.08] the number of slots belonging to the mobile station's RACH betweeninitiation of the immediate assignment procedure and the first CHANNEL REQUEST message (excluding the slotcontaining the message itself) is a random value drawn randomly for each new initial assignment initiation withuniform probability distribution in the set {0, 1, ..., max (T,8) - 1}, where T stands for Tx_Integer. AssumingTx_Integer=25, corresponding time delay will be 0~ 2) Transmission time for Channel Request message on Um 3) Transmission time for last DL DATA on Um 4) Considering the PC delay for COM-port data transmission and receiving, and also the SW time consumptions,which is totally about 400ms,
the GLOBAL TIME DELAY for FIRST PING WITHOUT PDCH ESTABLISHMENTwill be 1660ms to 1780ms.
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500BYTES PING SCENARIO(Consecutive PING, with Delayed DL TBF Release, B7)MSPDCHDLTBF(oflastPING)PDCHULTBFBTSBSCMFSCN200msPacket DL Data Ack/Nack (Channel Request)1)0~200msPacket UL Assignment85msPacket UL Dummy Control Block (with TLLI)155msDATA(Echo Request)18CS2_BlksEcho Request(LLC:538Bytes)Echo Reply(LLC:538Bytes)2) 400ms20ms32ms3) 80msDATA(Echo Reply)18CS2_Blks140ms4) Note 1) During the DL TBF delay of last PING, Packet DL Data Ack/Nack is sent by MS every 200ms. Detecting a datatransfer request from upper layer, MS will send Channel Request IE in the next Packet DL Data Ack/Nack message andwait for the UL TBF Assignment from network. Therefore, the delay of sending out channel request in the MS will be0~ 2) The transmission time for UL Data is shorter comparing to the one in First PING, since all of the data istransmitted with CS2 3) DL TBF is already exist and no need to be re-established, therefore, the delay time for DL datatransmitting is shortened to 80msNote 4) Transmission time for last DL DATA on Um 5) Considering the PC delay for COM-port data transmission and receiving, and also the SW time consumptions,which is totally about 400ms,
the GLOBAL TIME DELAY for CONSECUTIVE PING WITH DELAYED DL TBFMS&PC200msDL
DataTransfer160msDLtransPrep80msCNReplyTime32msUL
DataTransfer420msUL
TBF
Establish
Time240~440msMS&PC200msRELEASE will be 1330ms to 1530ms.
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GPRS ATTACH SCENARIO (1 of 2)(with Authentication & Ciphering Procedure, B7)MSBCCHChannel RequestBTSBSCMFSCN1)0~120msRACHChannel RequiredChannel Request2) 5ms30ms3)UL
TBF
Establish
Time662~782msDL
DataTransfer40msDL
TBF
300msCNReplyTime10msUL
DataTransfer65msRadio Alloc. Req.7msRadio Alloc. Conf.70msAGCHTM Alloc. Req.8msTM Alloc. Conf.190msChannel Ass. ULImm. Ass. CommandImm. Assignment110ms32ms210msPacket UL Dummy Control Block (with TLLI)PDCHULTBFDATA(Attach Request)3CS1_BlksAttach Request(LLC:37Bytes)Auth. & Ciph. Req.(LLC:22Bytes)Packet DL Assignment60ms5ms10ms80ms136msAccess BurstPacket Power Control / DATA(Auth. & Ciph. Request)1CS2_Blks20ms20ms(TO BE CONTINUED)Note 1) Channel Request Delay——[GSM TS04.08] the number of slots belonging to the mobile station's RACH betweeninitiation of the immediate assignment procedure and the first CHANNEL REQUEST message (excluding the slotcontaining the message itself) is a random value drawn randomly for each new initial assignment initiation withuniform probability distribution in the set {0, 1, ..., max (T,8) - 1}, where T stands for Tx_Integer. AssumingTx_Integer=25, corresponding time delay will be 0~ 2) Transmission time for Channel Request message on Um 3) If the PDCHs are already exist, and no need to be established, the time delay between Channel Request toChannel Assignment UL on GSL interface will be about 12ms (pls. refer to 500BYTE PING SCENARIO——First PING,without PDCH establishment, B7). In this case, the global delay for the UL TBF establish will be 289~409ms.
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GPRS ATTACH SCENARIO (2 of 2)(with Authentication & Ciphering Procedure, B7)MSBTSBSCMFSCN4)700msSRESPreparing
Time700msUL
DataTransfer25msUL
TBF
Establish
Time240~440msMSPrepTime130msDLDataTransfer20msDLTransPrep80msCNReplyTime12msUL
DataTransfer25msUL
TBF
EstablishTime240~440msPDCHDLTBFPacket DL Data Ack/Nack (Channel Request)5)0~200ms85msPacket UL AssignmentPacket UL Dummy Control Block (with TLLI)155msPDCHULTBFDATA(Auth. & Ciph. Response)1CS2_Blks20msAuth. & Ciph. Resp(LLC:19Bytes)Attach Accept(LLC:30Bytes)5ms12msDATA(Attach Accept)1CS2_Blks6) 80ms20ms130ms0~200msPDCHDLTBFPacket DL Data Ack/Nack (Channel Request)85msPacket UL AssignmentPacket UL Dummy Control Block (with TLLI)155msDATA(Attach Complete)1CS2_Blks20msAttach Complete(LLC:8Bytes)5msASB BU2 MNO (Radio Network Optimization)
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...Note 4) “SRES Preparing Time” is the time that MS calculates SRESNote 5) During the DL TBF delay, Packet DL Data Ack/Nack is sent by MS every 200ms. When MS finished SREScalculation, it will send Channel Request IE in the next Packet DL Data Ack/Nack message and wait for the UL TBFAssignment from network. Therefore, the corresponding delay will be 0~ 6) DL TBF is already exist and no need to be re-established, therefore, the delay time for DL datatransmitting is 7) According to the CMCC GPRS DT/CQT Test Criterion, GPRS Attach Delay is timing from when an Attach Requestis about to be sent in the MS, to an Attach Accept message received by the MS. Considering the delay in Uminterface for the last DL data (Attach Accept), which is about 20ms,
the GLOBAL TIME DELAY for GPRSAttach with PDCH establishment will be 2150ms to 2470ms, while the GLOBAL TIME DELAY forGPRS Attach without PDCH establishment will be 1780ms
8
MOBILE
GPRS ATTACH SCENARIO(without Authentication & Ciphering Procedure, B7)MSBCCHRACHChannel RequestChannel RequiredChannel RequestBTSBSCMFSCN0~120ms5ms30ms7msUL
TBF
Establish
Time662~782msUL
DataTransfer25msUL
TBF
EstablishTime240~440msMSPrepTime130msDL
DataTransfer40msDL
TBF
300msCNReplyTime14msUL
DataTransfer65msRadio Alloc. Alloc. Conf.70msAGCHTM Alloc. Req.8msTM Alloc. Conf.190msChannel Ass. ULImm. Ass. CommandImm. AssignmentPacket UL Dummy Control Block (with TLLI)110ms32ms210msPDCHULTBFDATA(Attach Request)3CS1_BlksAttach Request(LLC:37Bytes)Attach Accept(LLC:30Bytes)Packet DL Assignment60ms5ms14ms80ms136msAccess BurstPacket Power Control / Timing Advance84msDATA(Attach Accept)1CS2_Blks20ms20msPDCHDLTBFPacket DL Data Ack/Nack (Channel Request)130ms0~200msPacket UL Assignment85msPacket UL Dummy Control Block (with TLLI)155msASB BU2 MNO (Radio Network Optimization)
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...Note 1)
The GLOBAL TIME DELAY for GPRS Attach with PDCH establishment will be 1080ms to1200ms, while the GLOBAL TIME DELAY for GPRS Attach without PDCH establishment will be710ms DATA(Attach Complete)1CS2_Blks20msAttach Complete(LLC:8Bytes)5ms
9
MOBILE
PDP CONTEXT ACTIVATION SCENARIO(B7)MSBCCHChannel RequestBTSBSCMFSCN0~120msRACHChannel RequiredChannel Request5ms30msUL
TBF
Establish
Time662~782msDL
DataTransfer40msDL
TBF
300msCNReplyTime23msUL
DataTransfer65msRadio Alloc. Req.7msRadio Alloc. Conf.70msAGCHTM Alloc. Req.8msTM Alloc. Conf.190msChannel Ass. ULImm. Ass. CommandImm. Assignment110ms32ms210msPacket UL Dummy Control Block (with TLLI)PDCHULTBFDATA(Active PDP Context Request)3CS1_BlksAct. PDP Cont. Req(LLC:43Bytes)Act. PDP Cont. Acc(LLC:25Bytes)Packet DL Assignment60ms5ms23ms80ms136msAccess BurstPacket Power Control / DATA(Active PDP Context Accept)1CS2_Blks20ms20msNote 1)
The GLOBAL TIME DELAY for GPRS Attach with PDCH establishment will be 1090ms to1210ms, while the GLOBAL TIME DELAY for GPRS Attach without PDCH establishment will be720ms to 840ms.
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WAP SCENARIO (1 of 4)(with PDP Context Activation, B7)MSBCCHChannel RequestBTSBSCMFSCN0~120msRACHChannel RequiredChannel Request5ms30msUL
TBF
Establish
Time662~782msDL
DataTransfer40msDL
TBF
300msCNReplyTime23msUL
DataTransfer65msRadio Alloc. Req.7msRadio Alloc. Conf.70msAGCHTM Alloc. Req.8msTM Alloc. Conf.190msChannel Ass. ULImm. Ass. CommandImm. Assignment110ms32ms210msPacket UL Dummy Control Block (with TLLI)PDCHULTBFDATA(Active PDP Context Request)3CS1_BlksAct. PDP Cont. Req(LLC:43Bytes)Act. PDP Cont. Acc(LLC:25Bytes)Packet DL Assignment60ms5ms23ms80ms136msAccess BurstPacket Power Control / DATA(Active PDP Context Accept)1CS2_Blks20ms20ms(TO BE CONTINUED)
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WAP SCENARIO (2 of 4)(with PDP Context Activation, B7)MSBTSBSCMFSCN~1300msMS
PrepTime1300msUL
Data
Transfer87msUL
TBF
EstablishTime240~440msDL
DataTransfer80msMSPrepTime320msDL
TBF
EstablishTime300msUL
DataTransfer240msCNReplyTime32msUL
TBF
EstablishTime240~440msPDCHDLTBFPacket DL Data Ack/Nack (Channel Request)0~200msPacket UL Assignment85msPacket UL Dummy Control Block (with TLLI)155msDATA(INVOKE(Connect))10CS2_BlksINVOKE(Connect)(LLC:281Bytes)RESULT(Conn Reply)(LLC:74Bytes)220ms20ms32msPDCHUL TBFPacket DL Assignment80msAccess Burst136msPacket Power Control / Timing Advance84msDATA(RESULT(Connect Reply))Packet DL Data Ack/Nack (Channel Request)20ms320ms0~200msPacket UL Assignment85msPacket UL Dummy Control Block (with TLLI)155msDATA(ACK)2CS2_BlksACK(LLC:41Bytes)80msDATA(INVOKE(Get))2CS2_BlksINVOKE(Get)(LLC:69Bytes)7ms(TO BE CONTINUED)
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WAP SCENARIO (3 of 4)(with PDP Context Activation, B7)MSBTSBSCMFSRESULT(Reply)(LLC:506Bytes+506Bytes+370Btyes)CN530msCNReplyTime530msDL
DataTransfer40msDLtransPrep80msCNReplyTime30msUL
DataTransfer47msUL
TBF
EstablishTime240~440msMSPrepTime400msUL
DataTransfer47msUL
TBF
EstablishTime240~440msMSPrepTime120msDL
DataTransfer340msDLtransPrep80ms80msDATA(RESULT(Reply))47CS2_Blks320ms20msPDCHDLTBFPacket DL Data Ack/Nack (Channel Request)120ms0~200msPacket UL Assignment85msPacket UL Dummy Control Block (with TLLI)155msDATA(ACK)2CS2_BlksACK(LLC:41Bytes)2) 40ms7ms400msPacket DL Data Ack/Nack (Channel Request)0~200msPacket UL Assignment85msPacket UL Dummy Control Block (with TLLI)155msDATA(INVOKE)2CS2_BlksINVOKE(LLC:44Bytes)RESULT(Reply)(LLC:48Bytes)2) 40ms7ms30ms80msDATA(RESULT(Reply))2CS2_Blks20ms20ms(TO BE CONTINUED)Note 1)
The GLOBAL TIME DELAY for GPRS First WAP PAGE with PDCH establishment will be6120ms to 7040ms, while the GLOBAL TIME DELAY for GPRS First WAP PAGE without PDCHestablishment will be 5750ms to 6670ms.
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WAP SCENARIO (4 of 4)(with PDP Context Activation, B7)MSBTSBSCMFSCN100msPacket DL Data Ack/Nack (Channel Request)0~200msPacket UL Assignment85msPacket UL Dummy Control Block (with TLLI)155msDATA(ACK)2CS2_BlksACK(LLC:41Bytes)2) 40ms7msUL
DataTransfer47msUL
TBF
EstablishTime240~440msMSPrepTime100ms
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