1、 ETSI TR 125 903 V14.0.0 (2017-04) Universal Mobile Telecommunications System (UMTS); Continuous connectivity for packet data users (3GPP TR 25.903 version 14.0.0 Release 14) TECHNICAL REPORT ETSI ETSI TR 125 903 V14.0.0 (2017-04)13GPP TR 25.903 version 14.0.0 Release 14Reference RTR/TSGR-0125903ve0
2、0 Keywords UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can be dow
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7、e written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2017. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
8、 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TR 125 903 V14.0.0 (2017-04)23GPP TR 25.903 version 14.0.0 Release 14Intellectual Pro
9、perty Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs);
10、Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carr
11、ied out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Report (TR) has been produced by ETSI 3rd Generation
12、Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ET
13、SI identities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for th
14、e expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TR 125 903 V14.0.0 (2017-04)33GPP TR 25.903 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 6g3
15、Introduction 6g31 Scope 7g32 References 7g33 Definitions, symbols and abbreviations . 8g33.1 Definitions 8g33.2 Symbols 8g33.3 Abbreviations . 8g34 Technical concepts . 9g34.1 New DPCCH slot format 10g34.1.1 Description of the concept 10g34.1.1.1 General description . 10g34.1.1.2 Detailed proposals
16、. 12g34.1.1.2.1 SIR target adjustment 13g34.1.1.2.2 CPC initiation and termination 13g34.1.2 Analysis of the concept . 14g34.1.2.1 Simulation results on UL TPC error rate . 14g34.1.2.2 Simulation results on other UL channels 17g34.1.2.2.1 CQI transmission. 19g34.1.2.2.2 HARQ-ACK transmission . 26g34
17、.1.2.2.3 Observations from simulations of HS-DPCCH performance in sub-clauses 4.1.2.2.1 and 4.1.2.2.2 . 31g34.1.2.3 Conclusions from TPC performance (sub-clause 4.1.2.1) and HS-DPCCH performance (sub-clause 4.1.2.2) . 32g34.1.2.4 Power control delay. 32g34.1.3 Benefits of the concept . 33g34.1.4 Ope
18、n issues of the concept 33g34.2 Uplink DPCCH gating 33g34.2.1 Description of the concept 33g34.2.1.1 General principle . 34g34.2.1.2 Basic packet traffic example . 34g34.2.1.3 VoIP traffic example . 34g34.2.1.4 Operation of the uplink DPCCH gating 35g34.2.2 Analysis of the concept . 37g34.2.2.1 Powe
19、r control stability 37g34.2.2.2 F-DPCH performance . 40g34.2.2.3 Uplink link performance . 44g34.2.2.3.1 Additional link level results . 46g34.2.2.3.2 Link level results for CQI decoding and for large TB sizes 54g34.2.2.3.3 Preamble detection link level result for uplink DPCCH gating with long gatin
20、g gap . 60g34.2.2.4 System performance 62g34.2.2.4.1 Simulation assumptions . 62g34.2.2.4.2 VoIP results with and without gating 2 ms TTI 62g34.2.2.4.3 VoIP results with and without gating 10 ms TTI and packet bundling 64g34.2.2.4.4 VoIP results - Summary 66g34.2.2.4.5 Impact of inactive users to ce
21、ll throughput 66g34.2.2.4.6 System-level performance with high-velocity UEs . 68g34.2.2.5 UE battery saving calculations 70g34.2.3 Benefits of the concept . 73g34.2.4 Open issues of the concept 73g3ETSI ETSI TR 125 903 V14.0.0 (2017-04)43GPP TR 25.903 version 14.0.0 Release 144.3 SIR_target reductio
22、n. 73g34.3.1 Description of the concept 73g34.3.1.1 L1 signalling approach 73g34.3.1.1.1 Interworking aspects 75g34.3.1.1.2 Handling of VoIP traffic 75g34.3.1.2 L2 signalling approach 76g34.3.1.2.1 New parameters for L2 signalling approach 77g34.3.1.3 Approach with predefined/configured rules 77g34.
23、3.2 Analysis of the concept . 78g34.3.2.1 Simulation of the concept 78g34.3.2.1.1 Simulation assumptions. 78g34.3.2.1.2 Simulation results 79g34.3.2.2 Noise rise caused by UL DPCCH . 81g34.3.2.3 Potential gain in terms of number of additional users 2 presented to TSG for approval; 3 or greater indic
24、ates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. Introduction Packet-oriented f
25、eatures like HSDPA and E-DCH in WCDMA/UMTS systems will promote the subscribers desire for continuous connectivity, where the user stays connected over a long time span with only occasional active periods of data transmission, and avoiding frequent connection termination and re-establishment with it
26、s inherent overhead and delay. This is the perceived mode a subscriber is used to in fixed broadband networks (e.g. DSL) and a precondition to attract users from fixed broadband networks. To support a high number of HSDPA users in the code limited downlink the feature F-DPCH was introduced in REL-6.
27、 In the uplink, the limiting factor for supporting a similarly high number of E-DCH users is the noise rise. For such a high number of users in the cell it can be assumed that many users are not transmitting any user data for some time (e.g. for reading during web browsing or in between packets for
28、periodic packet transmission such as VoIP).The corresponding overhead in the noise rise caused by maintained control channels will significantly limit the number of users that can be efficiently supported. As completely releasing dedicated channels during periods of traffic inactivity would cause co
29、nsiderable delays for reestablishing data transmission and a corresponding bad user perception, this WI is intended to reduce the impact of control channels on uplink noise rise while maintaining the connections and allowing a much faster reactivation for temporarily inactive users. ETSI ETSI TR 125
30、 903 V14.0.0 (2017-04)73GPP TR 25.903 version 14.0.0 Release 141 Scope The present document summarizes the work done under the WI “Continuous Connectivity for Packet Data Users” defined in 1 by listing technical concepts addressing the objectives of the work item (see below), analysing these technic
31、al concepts and selecting the best solution (which might be a combination of technical concepts). “The objective of this work item is to reduce the uplink noise rise from physical control channels of packet data users, e.g. for users which have temporarily no data transmission. This is intended to s
32、ignificantly increase the number of packet data users (i.e. HS-DSCH/E-DCH users without UL DPDCH) in the UMTS FDD system that can stay in CELL_DCH state over a long time period, without degrading cell throughput, and that can restart transmission after a period of inactivity with a much shorter dela
33、y ( 3.3 Abbreviations For the purposes of the present document, the following abbreviations apply: ACK Acknowledgement CQI Channel Quality Indicator CPC Continuously Packet Connected or Continuous Packet Connectivity CRC Cyclic Redundancy Check DCH Dedicated Channel DL Downlink DPCCH Dedicated Physi
34、cal Control Channel DPCH Dedicated Physical Channel DPDCH Dedicated Physical Data Channel DTX Discontinuous Transmission E-DCH Enhanced Dedicated Channel ETSI ETSI TR 125 903 V14.0.0 (2017-04)93GPP TR 25.903 version 14.0.0 Release 14E-DPCCH E-DCH Dedicated Physical Control Channel E-DPDCH E-DCH Dedi
35、cated Physical Data Channel E-AGCH E-DCH Absolute Grant Channel E-HICH E-DCH HARQ Acknowledgement Indicator Channel E-RGCH E-DCH Relative Grant Channel F-DPCH Fractional Dedicated Physical Channel HSDPA High Speed Downlink Packet Access HS-DSCH High Speed Downlink Shared Channel HS-PDSCH High Speed
36、Physical Downlink Shared Channel HS-SCCH High Speed Physical Downlink Shared Control Channel NACK Negative Acknowledgement P-CCPCH Primary Common Control Physical Channel RL Radio LinkS-CCPCH Secondary Common Control Physical Channel SCH Synchronisation Channel SIR Signal-to-Interference RatioTFC Tr
37、ansport Format Combination TPC Transmit Power Control TPC CER TPC Command Error Rate TTI Transmission Time Interval UE User Equipment UL Uplink UTRAN UMTS Terrestrial Radio Access Network 4 Technical concepts This section describes and analyses the suggested technical concepts addressing the problem
38、 described by the work item “Continuous Connectivity for Packet Data Users” defined in 1. This section 4 includes feasible concepts to address the WI without claiming that the concepts are complete or restricting the addition of alternatives. The following common base for all concepts can be assumed
39、: - Packet data users in CELL_DCH state using HSDPA and E-DCH as described in REL-6 are addressed. - The UE is and will remain in the CELL_DCH RRC state whatever continuous connectivity concept will be applied. - The signalling radio bearers (SRBs) are assumed to be mapped on HS-DSCH in downlink (as
40、 is necessary for F-DPCH, anyway) and on E-DCH in uplink. - UL channels present in this case: UL DPCCH, HS-DPCCH, E-DPCCH, E-DPDCH (E-DPCCH, E-DPDCH are DTXed when no data (or rate requests) needs to be transmitted on E-DPDCH). - DL channels present in this case: F-DPCH, HS-SCCH, HS-PDSCH, E-AGCH, E
41、-RGCH, E-HICH. To avoid DL channelization code limitations F-DPCH instead of DL DPCCH is considered. Different phases during the stay in the CELL_DCH state can be distinguished by the activity of the data channels: - Packet on HS-PDSCH is transmitted to the UE in the TTI. - inactive DL: No packet is
42、 transmitted on HS-PDSCH to the UE in the TTI. - Packet on E-DPDCH is transmitted to the Node B in the TTI. - inactive UL: No packet is transmitted on E-DPDCH to the Node B in the TTI. It is the aim that the application of a continuous connectivity concept will not affect the performance of a transm
43、ission in an active TTI. The description of the active and inactive phases does not preclude the way and whether or not CELL_DCH substates should be introduced. The continuous connectivity concepts are addressing the control channels (i.e. one or more) during inactive phases in UL and/or DL. ETSI ET
44、SI TR 125 903 V14.0.0 (2017-04)103GPP TR 25.903 version 14.0.0 Release 14The triggers for initiating and terminating the use of a continuous connectivity concept relative to the start and end of active and inactive phases depend on the considered concept. For example: - whether the concept is trigge
45、red when there is inactivity in just one direction (i.e. only DL, only UL) or in both directions (UL - whether a transition from activity to inactivity will directly trigger the application of the concept or whether there is a short period of inactive phase without applying the concept (e.g. if a ti
46、mer is used to trigger the concept); - whether very short periods of DL and/or UL inactivity (e.g. during transmission of VoIP packets or where a UE is not scheduled but data is waiting in the scheduler queue) could also be addressed by a continuous connectivity concept. - whether during an inactive
47、 phase the concept is used during transmission of physical layer signalling (e.g. on HS-DPCCH or HS-SCCH). The period during which a continuous connectivity concept is applied is called “Continuously Packet Connected mode“ or shorter “CPC mode“. Transitions between the different phases: The followin
48、g transitions are called “ CPC initiation“: - active phase to CPC mode - inactive phase where REL-6 is applied as usual to CPC mode while the transition back is called “CPC termination“: - CPC mode to active phase. - CPC mode to inactive phase where REL-6 is applied as usual Triggers for the transit
49、ions and a description of the signalling (e.g. L1 or L2 signalling) or the implicit rules/blind detection (if no signalling is required) for the transitions has to be described in the different continuous connectivity concepts. Nevertheless, three general transition control approaches (i.e. who will have the final decision about the transition) could be distinguished: - transition is controlled by the UE - transition is controlled by the Node B - transition is controlled by predefined rules applied by both UE and Node B This includes also the possibility to have a co
