3 GPP TSG RAN WG 1 NR Ad

  • Slides: 8
Download presentation
3 GPP TSG RAN WG 1 NR Ad Hoc Meeting Qingdao, China, 27 -

3 GPP TSG RAN WG 1 NR Ad Hoc Meeting Qingdao, China, 27 - 30 June 2017 Agenda Item: 5. 1. 3. 3. 3 R 1 -17 xxxxx Offline discussions on UL data transmission without grant NTT DOCOMO

Background • • NR Ad-Hoc(Jan 2017) agreement – For an UL transmission scheme without

Background • • NR Ad-Hoc(Jan 2017) agreement – For an UL transmission scheme without grant • at least semi-static resource (re-)configuration is supported – FFS: The resource configuration includes at least physical resource in time and frequency domain and RS parameters – Higher-layer signaling could be similar to Rel-8 LTE SPS – FFS: MCS RAN 1#88 agreement – For UL transmission without grant, • The resource configuration includes at least the following – Time and frequency resources, FFS: including resources for repetitions, implicitly or explicitly – Modulation and coding scheme(s), possibly including RV, implicitly or explicitly – Reference signal parameters – FFS: Details – FFS: The number of repetitions K – FFS: Whether multiple number of K can be configured to one UE – FFS other parameters

Background • RAN 1#89 agreement – If network configures, UL data transmission without UL

Background • RAN 1#89 agreement – If network configures, UL data transmission without UL grant can be performed after semi-static resource configuration in RRC without L 1 signaling – If network configures, L 1 signaling for activation/deactivation and/or modification on parameters for UL data transmission without UL grant can be applied – RAN 1 is discussing whether the mechanism to distinguish UL SPS and UL data transmission without UL grant is necessary. – “semi-static resource configuration in RRC” agreed by R 1 -1709537 includes UE-specific semi-static configuration for RS.

Background • RAN 1#88 agreement • For UE configured with K repetitions for a

Background • RAN 1#88 agreement • For UE configured with K repetitions for a TB transmission with/without grant, the UE can continue repetitions (FFS can be different RV versions, FFS different MCS) for the TB until one of the following conditions is met – If an UL grant is successfully received for a slot/mini-slot for the same TB • FFS: How to determine the grant is for the same TB – FFS: An acknowledgement/indication of successful receiving of that TB from g. NB – The number of repetitions for that TB reaches K – FFS: Whether it is possible to determine if the grant is for the same TB

Functionality of L 1 signalling • At least following functionality of the L 1

Functionality of L 1 signalling • At least following functionality of the L 1 signalling is supported – Activation/Deactivation – Modification of parameters configured by RRC • For example at least following parameters are common in the RRC configuration and L 1 signaling – One resource including following » Time domain resource allocation for one transmission corresponding to one of the K repetitions, when K>1 » Frequency domain resource allocation in terms of RB(s) or RBG(s) » UE-specific DMRS configuration – MCS/TBS – Switch to grant-based Scheduling re-transmission of the TB transmitted without grant based on the UL grant • Companies are encouraged to provide detailed methods to determine the grant is for the same TB – Companies are encouraged to provide analysis to prove the benefits of supporting an acknowledgement/indication of successful receiving of that TB from g. NB in next meeting

Formats of L 1 signalling • Select from following two options to achieve each

Formats of L 1 signalling • Select from following two options to achieve each of the L 1 signalling functionalities described in previous slide in next meeting – Option 1: UE-specific DCI (UL grant) – Option 2: Group common DCI • FFS the monitoring occasions for the L 1 signalling

RRC configurations • At least for UL transmission without UL grant and without L

RRC configurations • At least for UL transmission without UL grant and without L 1 activation/deactivation signalling, the RRC (re-)configuration for a set of resource and parameters includes at least the following • Time interval for periodic transmissions, where the minimum time interval can be • Option 1: 1 slot • Option 2: N symbols • One resource including following • Time domain resource allocation for one transmission corresponding to one of the K repetitions, when K>1 • Frequency domain resource allocation in terms of RB(s) or RBG(s) • UE-specific DMRS configuration • At least one resource can be configured for one UE within one time interval for periodic transmissions • FFS multiple resources can be configured for one UE within one time interval for periodic transmissions • Note: • At least repetition can be performed on the resource defined above • FFS multiple resources can be configured for the K repetitions, where K>1

RRC configurations (Cont. ) • At least for UL transmission without UL grant and

RRC configurations (Cont. ) • At least for UL transmission without UL grant and without L 1 activation/deactivation signalling, the RRC (re-)configuration for a set of resource and parameters includes at least the following • Other transmission related parameters: • An MCS/TBS value • Number of repetitions K • Power control related parameters • FFS: HARQ process related parameters • FFS: Possible RVs related parameters for repetitions • FFS: Possible hopping related parameters including enable/disable configurability • FFS: Possible ACK feedback related parameters • FFS other parameters • Multiple sets of resource and parameters can be (re-)configured for each UE