Content for TR 25.912 Word version: 16.0.0
3 Definitions, symbols and abbreviations
4 Introduction
5 Deployment scenario
6 Radio interface protocol architecture for evolved UTRA
7 Physical layer for evolved UTRA
8 Layer 2 and RRC evolution for evolved UTRA
9 Architecture for evolved UTRAN
10 RF related aspects of evolved UTRA
11 Radio resource management aspects of evolved UTRA
12 System and terminal complexity
13 Performance assessments
14 Conclusions and Recommendations
$ Change History
3 Definitions, symbols and abbreviations
4 Introduction Word‑p. 9
5 Deployment scenario Word‑p. 10
6 Radio interface protocol architecture for evolved UTRA
6.1 User plane Word‑p. 12
6.2 Control plane
7 Physical layer for evolved UTRA Word‑p. 13
7.1 Downlink transmission scheme
7.1.1 Basic transmission scheme based on OFDMA
7.1.1.1 Basic parameters
7.1.1.1.1 Modulation scheme Word‑p. 14
7.1.1.2 Multiplexing including reference-signal structure
7.1.1.2.1 Downlink data multiplexing
7.1.1.2.2 Downlink reference-signal structure
7.1.1.2.3 Downlink L1/L2 Control Signaling
7.1.1.3 MIMO and transmit diversity Word‑p. 15
7.1.1.4 MBMS
7.1.2 Physical layer procedure
7.1.2.1 Scheduling
7.1.2.2 Link adaptation Word‑p. 16
7.1.2.3 HARQ
7.1.2.4 Cell search
7.1.2.5 Inter-cell interference mitigation Word‑p. 17
7.1.3 Physical layer measurements
7.2 Uplink transmission scheme
7.2.1 Basic transmission scheme
7.2.1.1 Modulation scheme Word‑p. 19
7.2.1.2 Multiplexing including reference signal structure
7.2.1.2.1 Uplink data multiplexing
7.2.1.2.2 Uplink reference-signal structure Word‑p. 20
7.2.1.2.3 Multiplexing of L1/L2 control signaling
7.2.1.2.4 Uplink L1/L2 Control Signalling
7.2.1.3 MIMO Word‑p. 21
7.2.1.4 Power De-rating Reduction
7.2.2 Physical channel procedure
8 Layer 2 and RRC evolution for evolved UTRA Word‑p. 23
8.1 MAC sublayer Word‑p. 24
8.1.1 Services and functions
8.1.2 Logical channels
8.1.2.1 Control channels Word‑p. 25
8.1.2.2 Traffic channels
8.1.3 Mapping between logical channels and transport channels
8.2 RLC sublayer
8.3 PDCP sublayer Word‑p. 27
8.4 RRC
9 Architecture for evolved UTRAN Word‑p. 29
9.1 Evolved UTRAN architecture
9.2 Functional split
9.3 Interfaces Word‑p. 30
9.3.1 S1 interface
9.3.1.1 Definition
9.3.1.2 S1-C RNL protocol functions
9.3.1.3 S1-U RNL protocol functions
9.3.1.4 S1-X2 similarities
9.3.2 X2 interface
9.4 Intra-LTE-access-system mobility
9.4.1 Intra-LTE-access-system mobility support for UE in LTE_IDLE
9.4.2 Intra LTE-Access-System Mobility Support for UE in LTE_ACTIVE
9.5 Inter 3GPP access system mobility
9.5.1 Inter 3GPP access system mobility in Idle state
9.5.2 Inter 3GPP access system mobility handover
9.6 Resource establishment and QoS signalling
9.7 Paging and C-plane establishment Word‑p. 35
9.8 Evaluations on for E-UTRAN architecture and migration
9.9 Support of roaming restrictions in LTE_ACTIVE
10 RF related aspects of evolved UTRA Word‑p. 36
11 Radio resource management aspects of evolved UTRA Word‑p. 37
11.1 Introduction
11.2 Definition and description of RRM functions
11.2.1 Radio Bearer Control (RBC)
11.2.2 Radio Admission Control (RAC)
11.2.3 Connection Mobility Control (CMC)
11.2.4 Packet Scheduling (PSC) Word‑p. 38
11.2.5 Inter-cell Interference Coordination (ICIC)
11.2.6 Load Balancing (LB)
11.2.7 Inter-RAT Radio Resource Management
11.3 RRM architecture in LTE
11.4 Support of load sharing and policy management across different Radio Access Technologies (RATs) Word‑p. 39
12 System and terminal complexity
13 Performance assessments Word‑p. 41
13.1 Peak data rate
13.2 C-plane latency Word‑p. 42
13.2.1 FDD frame structure Word‑p. 43
13.2.2 TDD frame structure type 1 Word‑p. 44
13.2.3 TDD frame structure type 2 Word‑p. 46
13.3 U-plane latency
13.3.1 FDD frame structure Word‑p. 47
13.3.2 TDD frame structure type 1 Word‑p. 48
13.3.3 TDD frame structure type 2 Word‑p. 49
13.4 User throughput Word‑p. 50
13.4.1 Fulfilment of uplink user-throughput targets
13.4.2 Fulfilment of downlink user-throughput targets Word‑p. 51
13.5 Spectrum efficiency Word‑p. 53
13.5.1 Fulfilment of uplink spectrum-efficiency target
13.5.2 Fulfilment of downlink spectrum-efficiency target Word‑p. 54
13.6 Mobility Word‑p. 55
13.6.1 Features supporting various mobile velocities
13.6.2 Assessment on U-plane interruption time during handover Word‑p. 56
13.6.3 Means to minimise packet loss during handover Word‑p. 58
13.7 Coverage
13.8 Support for point to multipoint transmission Word‑p. 59
13.9 Network synchronisation
13.10 Co-existence and inter-working with 3GPP RAT Word‑p. 61
13.11 General requirements
13.12 VoIP performance evaluation
14 Conclusions and Recommendations
14.1 Conclusions
14.2 Recommendations Word‑p. 63
$ Change History Word‑p. 64
