1、 ETSI TR 125 906 V15.0.1 (2018-07) 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 15.0.1 Release 15) TECHNICAL
2、 REPORT ETSI ETSI TR 125 906 V15.0.1 (2018-07)13GPP TR 25.906 version 15.0.1 Release 15Reference RTR/TSGR-0425906vf01 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
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14、3rd Generation 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, UM
15、TS, 3GPP and ETSI 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 (Verb
16、al forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TR 125 906 V15.0.1 (2018-07)33GPP TR 25.906 version 15.0.1 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g
17、3Foreword . 4g31 Scope 5g32 References 5g33 Definitions and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 6g34 Techniques considered 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
18、receiver performance reduction has no, or minimal impact to the overall UTRAN system level performance or user experience 6g34.1.1 MBMS transmission . 6g34.2 Scenarios in which individual UE receiver performance reduction may impact to the overall UTRAN system level performance or user experience .
19、6g34.2.1 HSDPA transmission 6g34.2.2 Transmission on dedicated channels . 7g34.2.3 E-DCH related downlink transmissions 7g35 MBMS Link level simulation scenarios, assumptions and results . 7g35.1 Link level scenarios based on adaptive thresholds . 7g35.1.1 Switching algorithm method 1 . 8g35.1.2 Swi
20、tching 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 simulation results 14g36 MBMS system level simulation scenarios, assumptions and results 17g36.1 System level scenarios 17g36.2 System level results and conc
21、lusions 17g37 Non-MBMS link level simulation scenarios, assumptions and result 22g37.0 General . 22g37.1 Link level scenarios for dedicated channels . 22g37.1.1 Switching algorithm for DCH . 22g37.1.2 Simulation conditions . 23g37.1.3 Simulation results . 23g37.1.3.1 Static channel conditions . 23g3
22、7.1.3.2 Case1 channel conditions 24g37.2 Link level scenarios for HSDPA DL channels . 25g37.2.1 Switching method algorithm for HSDPA . 25g37.2.2 Simulation conditions . 26g37.2.3 Simulation results . 26g38 Non-MBMS system level simulation scenarios, assumptions and result . 27g38.0 General . 27g38.1
23、 Network simulation assumptions . 27g38.2 Network simulation results . 28g39 Conclusions 29g3Annex A: Change history 30g3History 31 ETSI ETSI TR 125 906 V15.0.1 (2018-07)43GPP TR 25.906 version 15.0.1 Release 15Foreword This Technical Report has been produced by the 3rdGeneration Partnership Project
24、 (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should 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 versio
25、n 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 indicates TSG approved document under change control. Y the second digit is incremented for all changes of substance, i.e. technical enhancements, correction
26、s, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TR 125 906 V15.0.1 (2018-07)53GPP TR 25.906 version 15.0.1 Release 151 Scope The objectives of this study are: a) RAN4 to identify whether there are situations in which ind
27、ividual UE receiver performance reduction has no, or minimal impact to the overall UTRAN system level performance or user experience. RAN4 should also identify scenarios in which UE receiver performance reduction cannot safely be performed. b) RAN4 to investigate scenarios for the identified situati
28、ons where the UE could reduce its performance. The purpose of these scenarios is to ensure that UE performance is not degraded when conditions are not suitable. c) RAN2 to investigate additional signalling which may be beneficial to support Ues in the decision making process for reducing their perfo
29、rmance, for example quality thresholds which assist the UE in determining that conditions are suitable to reduce receiver performance. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. - References are either
30、 specific (identified by date of publication, edition number, version number, etc.) or non-specific. - For a specific reference, subsequent revisions 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
31、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: “Vocabulary for 3GPP Specifications”. 2 3GPP TS 25.214: “Physical layer procedures (FDD)”. 3 3GPP TS 25.101: “UE Radio transmission and reception (FDD)”. 4 3
32、GPP TS 25.331: “RRC Protocol Specification”. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and 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,
33、 if any, in TR 21.905 1. (no further terms defined) ETSI ETSI TR 125 906 V15.0.1 (2018-07)63GPP TR 25.906 version 15.0.1 Release 153.2 Abbreviations 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 docume
34、nt takes precedence over the definition of the same abbreviation, if any, in TR 21.905 1. (no further abbreviations defined) 4 Techniques considered 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
35、 receiver performance reduction has no, or minimal impact to the overall UTRAN system level performance or user experience 4.1.1 MBMS transmission It is considered acceptable from the system perspective to reduce or switch off UE receiver enhancements in good radio conditions when receiving point to
36、 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 any opportunity to reduce transmission power when UE is operating in good conditions. When the same UE moves into relatively worse radio conditions th
37、e enhanced receiver should be fully enabled, to provide the better MBMS service reception. From a user experience perspective, the important aspect is that UE attempts to maintain a certain downlink quality target corresponding to enhanced receiver performance requirements. This means that generally
38、 a UE in good radio conditions has the opportunity to reduce its receiver power consumption by reducing or turning off its receiver enhancements. However, in order to ensure correct UE behaviour, the initial assessment indicates that network should provide the desired quality target, which the UE sh
39、ould then autonomously attempt to meet or exceed when enhanced receiver is off. Determining good radio condition based on the network signalled quality target should be dependent on UE implementation, but additional requirements scenarios may need to be developed by RAN4 to ensure that Ues are able
40、to meet or exceed the desired quality target in different radio conditions and there is consistent behaviour between different UE implementations. Unlike dedicated channels, where the quality target is signalled to the UE for the purpose of outer loop power control, no quality targets are currently
41、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 determine 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 i
42、nvestigated 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 regardless of whether receiver enhancements are enabled, so the definition of quality target is rather different from the currently defined outer loop powe
43、r 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 needed 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 cas
44、es to ensure that the UE attempts to follow the network signalled quality target. 4.2 Scenarios in which individual UE receiver performance reduction 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 trans
45、mitted 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 throughput. Secondly, the power control on HSDPA channels (HS-DSCH and HS-SCCH) is implementation dependent. There is also an advantage to be gained in
46、terms of downlink transmit power reduction by using an enhanced receiver. 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 ETSI ETSI TR 125 906 V15.0.1 (2018-07)73GPP TR 25.906 version 15.0.1 R
47、elease 15Furthermore, no procedure is required to be standardized to support any possible receiver reconfiguration in HSDPA scenario. The standard specifies the CQI reporting range, which UE should be capable of reporting 2. The standard also specifies the enhanced receiver requirements, which are r
48、equired to be fulfilled by the UE supporting enhanced receiver 3. While fulfilling these requirements any possible receiver reconfiguration could be performed autonomously by the UE without specifying any procedure in 3GPP specification. Potential HSDPA reception scenarios where it might be desirabl
49、e to utilize UE dynamic receiver reconfiguration are explored in section 7.2. 4.2.2 Transmission on dedicated channels This refers to scenario, where 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 channels will enable the power control to reduce the downlink transmitted power compared to the scenario where enhanc
