1、 ETSI TR 125 906 V14.0.0 (2017-04) Universal Mobile Telecommunications System (UMTS); Dynamically reconfiguring a Frequency Division Duplex (FDD) User Equipment (UE) receiver to reduce power consumption when desired Quality of Service (QoS) is met (3GPP TR 25.906 version 14.0.0 Release 14) TECHNICAL
2、 REPORT ETSI ETSI TR 125 906 V14.0.0 (2017-04)13GPP TR 25.906 version 14.0.0 Release 14Reference RTR/TSGR-0425906ve00 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
3、 non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions
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9、nd the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TR 125 906 V14.0.0 (2017-04)23GPP TR 25.906 version 14.0.0 Release 14Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information per
10、taining 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); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secre
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12、n 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 Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, U
13、MTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “shoul
14、d“, “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 the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETS
15、I ETSI TR 125 906 V14.0.0 (2017-04)33GPP TR 25.906 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 6g34 Techniques considere
16、d for dynamically reconfiguring a FDD UE receiver to reduce power consumption when desired Quality of Service is met 6g34.1 Scenarios in which individual UE receiver performance reduction has no, or minimal impact to the overall UTRAN system level performance or user experience 6g34.1.1 MBMS transmi
17、ssion . 6g34.2 Scenarios in which individual UE receiver performance reduction may impact to the overall UTRAN system level performance or user experience . 6g34.2.1 HSDPA transmission 6g34.2.2 Transmission on dedicated channels . 7g34.2.3 E-DCH related downlink transmissions 7g35 MBMS Link level si
18、mulation scenarios, assumptions and results . 7g35.1 Link level scenarios based on adaptive thresholds . 7g35.1.1 Switching algorithm method 1 . 8g35.1.2 Switching algorithm method 2 8g35.1.3 Further simulation parameters 9g35.1.4 Results 10g35.1.4.1 Panasonic simulation results . 10g35.1.4.2 Nokia
19、simulation results 14g36 MBMS system level simulation scenarios, assumptions and results 17g36.1 System level scenarios 17g36.2 System level results and conclusions 17g37 Non-MBMS link level simulation scenarios, assumptions and result 23g37.0 General . 23g37.1 Link level scenarios for dedicated cha
20、nnels . 23g37.1.1 Switching algorithm for DCH . 23g37.1.2 Simulation conditions . 24g37.1.3 Simulation results . 24g37.1.3.1 Static channel conditions . 24g37.1.3.2 Case1 channel conditions 25g37.2 Link level scenarios for HSDPA DL channels . 27g37.2.1 Switching method algorithm for HSDPA . 27g37.2.
21、2 Simulation conditions . 28g37.2.3 Simulation results . 28g38 Non-MBMS system level simulation scenarios, assumptions and result . 29g38.0 General . 29g38.1 Network simulation assumptions . 29g38.2 Network simulation results . 30g39 Conclusions 31g3Annex A: Change history 32g3History 33 ETSI ETSI T
22、R 125 906 V14.0.0 (2017-04)43GPP TR 25.906 version 14.0.0 Release 14Foreword This Technical Report has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Shoul
23、d the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater
24、indicates 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. ETSI ETSI TR 125 906 V14.
25、0.0 (2017-04)53GPP TR 25.906 version 14.0.0 Release 141 Scope The objectives of this study are: a) RAN4 to identify whether there are situations in which individual UE receiver performance reduction has no, or minimal impact to the overall UTRAN system level performance or user experience. RAN4 shou
26、ld also identify scenarios in which UE receiver performance reduction cannot safely be performed. b) RAN4 to investigate scenarios for the identified situations where the UE could reduce its performance. The purpose of these scenarios is to ensure that UE performance is not degraded when conditions
27、are not suitable. c) RAN2 to investigate additional signalling which may be beneficial to support Ues in the decision making process for reducing their performance, for example quality thresholds which assist the UE in determining that conditions are suitable to reduce receiver performance. 2 Refere
28、nces The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. For a specific reference, subsequent revisio
29、ns do not apply. For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. 1 3GPP TR 21.905: “Vocab
30、ulary for 3GPP Specifications”. 2 3GPP TS 25.214: “Physical layer procedures (FDD)”. 3 3GPP TS 25.101: “UE Radio transmission and reception (FDD)”. 4 3GPP TS 25.331: “RRC Protocol Specification”. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and
31、definitions given in TR 21.905 1 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 1. (no further terms defined) ETSI ETSI TR 125 906 V14.0.0 (2017-04)63GPP TR 25.906 version 14.0.0 Release 143.2 Abbreviations
32、For the purposes of the present document, the abbreviations given in TR 21.905 1 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905 1. (no further abbreviations defined) 4 Techniques considered
33、for dynamically reconfiguring a FDD UE receiver to reduce power consumption when desired Quality of Service is met 4.1 Scenarios in which individual UE receiver performance reduction has no, or minimal impact to the overall UTRAN system level performance or user experience 4.1.1 MBMS transmission It
34、 is considered acceptable from the system perspective to reduce or switch off UE receiver enhancements in good radio conditions when receiving point to multi-point MBMS data (mapped on S-CCPCH). This is because such transmission takes place with fixed transmission power level and so does not provide
35、 any opportunity to reduce transmission power when UE is operating in good conditions. When the same UE moves into relatively worse radio conditions the enhanced receiver should be fully enabled, to provide the better MBMS service reception. From a user experience perspective, the important aspect i
36、s that UE attempts to maintain a certain downlink quality target corresponding to enhanced receiver performance requirements. This means that generally a UE in good radio conditions has the opportunity to reduce its receiver power consumption by reducing or turning off its receiver enhancements. How
37、ever, in order to ensure correct UE behaviour, the initial assessment indicates that network should provide the desired quality target, which the UE should then autonomously attempt to meet or exceed when enhanced receiver is off. Determining good radio condition based on the network signalled quali
38、ty target should be dependent on UE implementation, but additional requirements scenarios may need to be developed by RAN4 to ensure that Ues are able to meet or exceed the desired quality target in different radio conditions and there is consistent behaviour between different UE implementations. Un
39、like dedicated channels, where the quality target is signalled to the UE for the purpose of outer loop power control, no quality targets are currently signalled for MBMS channels. Based on the analysis in RAN4 the transport channel level BLER or SDU error rate is found to be a good measure to determ
40、ine MBMS quality (e.g. MTCH BLER or SDU error rate) and the feasibility of additional signalling to create targets for such measures could be further investigated by RAN2. It should also be noted that the UE may either exceed the MTCH quality target, or be unable to meet the MTCH quality target rega
41、rdless of whether receiver enhancements are enabled, so the definition of quality target is rather different from the currently defined outer loop power control concept of a quality target. Due to the lack of signalling of quality target for p-t-m MBMS channels, some level of standardization is need
42、ed to assist UE to do receiver reconfiguration in p-t-m MBMS scenario. This could include specifying the signalling of quality target and some test cases to ensure that the UE attempts to follow the network signalled quality target. 4.2 Scenarios in which individual UE receiver performance reduction
43、 may impact to the overall UTRAN system level performance or user experience 4.2.1 HSDPA transmission One main benefit of HSDPA is the ability to transmitted high data rate in a very short period of time by exploiting the good radio conditions. This enhances the user bit rate as well as the system t
44、hroughput. Secondly, the power control on HSDPA channels (HS-DSCH and HS-SCCH) is implementation dependent. There is also an advantage to be gained in ETSI ETSI TR 125 906 V14.0.0 (2017-04)73GPP TR 25.906 version 14.0.0 Release 14terms of downlink transmit power reduction by using an enhanced receiv
45、er. Thus it is generally beneficial for the network that UE fully uses its enhanced receiver to measure CQI and for the demodulation of HSDPA downlink channels Furthermore, no procedure is required to be standardized to support any possible receiver reconfiguration in HSDPA scenario. The standard sp
46、ecifies the CQI reporting range, which UE should be capable of reporting 2. The standard also specifies the enhanced receiver requirements, which are required to be fulfilled by the UE supporting enhanced receiver 3. While fulfilling these requirements any possible receiver reconfiguration could be
47、performed autonomously by the UE without specifying any procedure in 3GPP specification. Potential HSDPA reception scenarios where it might be desirable to utilize UE dynamic receiver reconfiguration are explored in section 7.2. 4.2.2 Transmission on dedicated channels This refers to scenario, where
48、 dedicated channels such as DCH and F-DPCH are in operation. In these scenarios the closed loop power control automatically adjusts the downlink transmitted power in response to the variation in the downlink measured quality at the UE. Thus, a continuously active enhanced receiver on dedicated chann
49、els will enable the power control to reduce the downlink transmitted power compared to the scenario where enhanced receiver is dynamically switched on and switched off. The saved downlink power can be used to accommodate more users in the cell, extend the cell coverage or to increase the data rate transmission of the on going cells if needed. Furthermore, no procedure is required to be standardized to support any possible receiver reconfiguration in DCH scenarios. The network already signals the quality target (BLER for DCH and TPC command error ra
