TR 25.922
Radio resource management strategies
V7.1.0 (PDF)
2007/04 98 p.
V6.4.0
2006/12 8 p.
V5.4.0
2006/12 8 p.
V4.4.0
2006/12 8 p.
V3.9.0
2006/12 8 p.
- Rapporteur:
- Mr. Buldorini, Andrea
full Table of Contents for TR 25.922 Word version: 7.1.0
1 Scope Word‑p. 8
The present document shall describe RRM strategies supported by UTRAN specifications and typical algorithms.
This report is a release independent report. This means that the latest release applicable to 3GPP is the reference that this TR is defined upon, and contains information on all previous releases. Actual release where a given example applies is indicated in the relevant section.
2 References Word‑p. 8
3 Definitions and abbreviations Word‑p. 9
3.1 Definitions Word‑p. 9
3.2 Abbreviations Word‑p. 9
4 Idle Mode Tasks Word‑p. 11
4.1 Overview Word‑p. 11
4.2 Service type in Idle mode Word‑p. 11
4.3 Criteria for Cell Selection and Reselection Word‑p. 12
4.3.1 Cell Selection Word‑p. 12
4.3.2 Cell Re-selection Word‑p. 12
4.3.2.1 Hierarchical Cell Structures Word‑p. 12
4.3.2.2 Measurements for cell re-selection Word‑p. 13
4.3.2.3 Cell re-selection criteria Word‑p. 13
4.3.3 Mapping of thresholds in cell reselection rules Word‑p. 14
4.3.4 Barred / Reserved Cells and Access Restrictions for Cells Word‑p. 14
4.3.4.1 Barred cells Word‑p. 14
4.3.4.2 Reserved cells Word‑p. 14
4.3.4.3 Access Restrictions for Cells Word‑p. 14
4.4 Location Registration Word‑p. 15
5 RRC Connection Mobility Word‑p. 15
5.1 Handover Word‑p. 15
5.1.1 Strategy Word‑p. 15
5.1.2 Causes Word‑p. 15
5.1.3 Hard Handover Word‑p. 16
5.1.4 Soft Handover Word‑p. 16
5.1.4.1 Soft Handover Parameters and Definitions Word‑p. 16
5.1.4.2 Example of a Soft Handover Algorithm Word‑p. 16
5.1.4.3 Soft Handover Execution Word‑p. 17
5.1.5 Inter Radio Access Technology Handover Word‑p. 18
5.1.5.0 General Word‑p. 18
5.1.5.1 Handover UTRAN to GSM Word‑p. 19
5.1.5.2 Handover GSM to UTRAN Word‑p. 19
5.1.5.2.1 Introduction Word‑p. 19
5.1.5.2.2 Predefined radio configuration information Word‑p. 19
5.1.5.2.3 Security and UE capability information Word‑p. 20
5.1.5.2.4 UE capability information Word‑p. 20
5.1.5.2.5 Handover to UTRAN information flows, typical example Word‑p. 20
5.1.5.3 Handover from UTRAN to GERAN Iu mode Word‑p. 25
5.1.5.4 Handover from GERAN Iu mode to UTRAN Word‑p. 26
5.1.6 Measurements for Handover Word‑p. 26
5.1.6.1 Monitoring of FDD cells on the same frequency Word‑p. 26
5.1.6.2 Monitoring cells on different frequencies Word‑p. 26
5.1.6.2.1 Monitoring of FDD cells on a different frequency Word‑p. 26
5.1.6.2.2 Monitoring of TDD cells Word‑p. 26
5.1.6.2.3 Monitoring of GSM cells Word‑p. 26
5.1.7 Transfer of RRC information across interfaces other than Uu Word‑p. 28
5.1.7.1 Introduction and general principles Word‑p. 28
5.1.7.2 Message sequence diagrams Word‑p. 29
5.1.7.3 General error handling for RRC containers Word‑p. 36
6 Admission Control Word‑p. 42
6.1 Introduction Word‑p. 42
6.2 Examples of CAC strategies Word‑p. 42
6.2.1 CAC for handover Word‑p. 43
6.3 Scenarios Word‑p. 43
6.3.1 CAC performed in SRNC Word‑p. 43
6.3.2 CAC performed in DRNC Word‑p. 44
6.3.2.1 Case of DCH Word‑p. 44
6.3.2.2 Case of Common Transport Channels Word‑p. 44
7 Radio Bearer Control Word‑p. 45
7.1 Usage of Radio Bearer Control procedures Word‑p. 45
7.1.1 Examples of Radio Bearer Setup Word‑p. 45
7.1.2 Examples of Physical Channel Reconfiguration Word‑p. 46
7.1.2.1 Increased UL data, with switch from CELL_FACH to CELL_DCH Word‑p. 46
7.1.2.2 Increased DL data, no Transport channel type switching Word‑p. 47
7.1.2.3 Decrease DL data, no Transport channel type switching Word‑p. 47
7.1.2.4 Decreased UL data, with switch from CELL_DCH to CELL_FACH Word‑p. 47
7.1.3 Examples of Transport Channel Reconfiguration Word‑p. 48
7.1.4 Examples of Radio Bearer Reconfiguration Word‑p. 48
8 Dynamic Resource Allocation Word‑p. 50
8.1 Code Allocation Strategies for FDD mode Word‑p. 50
8.1.1 Introduction Word‑p. 50
8.1.2 Criteria for Code Allocation Word‑p. 50
8.1.3 Example of code Allocation Strategies Word‑p. 51
8.1.4 Void
8.2 DCA (TDD) Word‑p. 52
8.2.1 Channel Allocation Word‑p. 52
8.2.1.1 Resource allocation to cells (slow DCA) Word‑p. 52
8.2.1.2 Resource allocation to bearer services (fast DCA) Word‑p. 53
8.2.2 Measurements Reports from UE to the UTRAN Word‑p. 53
9 Power Management Word‑p. 54
9.1 Variable Rate Transmission Word‑p. 54
9.1.1 Examples of Downlink Power Management Word‑p. 54
9.1.2 Examples of Uplink Power Management Word‑p. 54
9.2 Void
9.3 Examples of balancing Downlink power Word‑p. 55
9.3.1 Adjustment loop Word‑p. 55
10 Radio Link Surveillance Word‑p. 55
10.1 Mode Control strategies for TX diversity Word‑p. 55
10.1.1 TX diversity modes Word‑p. 55
10.1.2 Mode Control Strategies Word‑p. 55
10.1.2.1 DPCH Word‑p. 55
10.1.2.2 Common channels Word‑p. 56
11 Codec mode control Word‑p. 56
11.1 AMR mode control Word‑p. 56
12 Congestion Control Word‑p. 59
12.1 Introduction Word‑p. 59
12.2 Example of Congestion Control procedures Word‑p. 59
13 High Speed Downlink Packet Access Word‑p. 59
13.1 HSDPA scheduling Word‑p. 59
13.1.1 Introduction Word‑p. 59
13.1.2 Scheduling strategies Word‑p. 60
13.1.2.1 Non real-time services Word‑p. 60
13.1.2.2 Real time / near real-time services Word‑p. 60
14 Multimedia Broadcast Multicast Service (MBMS) Word‑p. 62
14.1 Introduction Word‑p. 62
14.2 MBMS in UTRAN Word‑p. 62
14.2.1 Mapping of MBMS bearer to p-t-p and p-t-m channels Word‑p. 62
14.2.2 MBMS counting Word‑p. 62
14.2.3 MBMS RRM p-t-p / p-t-m switching strategies Word‑p. 63
A Simulations on Fast Dynamic Channel Allocation Word‑p. 65
A.1 Simulation environment Word‑p. 65
A.2 Results Word‑p. 65
A.2.1 Void
A.2.2 Micro UDD 384 Word‑p. 65
A.2.2.1 Code rate 1 Word‑p. 66
A.2.2.2 Code rate 2/3 Word‑p. 66
A.3 Conclusions Word‑p. 67
B Radio Bearer Control - Overview of Procedures: message exchange and parameters used Word‑p. 67
B.1 Examples of Radio Bearer Setup Word‑p. 67
B.1.1 RRC Parameters in RB Setup Word‑p. 67
B.1.2 Void
B.2 Examples of Physical Channel Reconfiguration Word‑p. 68
B.2.1 Increased UL data, with switch from CELL_FACH to CELL_DCH Word‑p. 68
B.2.1.1 RRC Parameters in Measurement Report Word‑p. 68
B.2.1.2 RRC Parameters in Physical Channel Reconfiguration Word‑p. 68
B.2.1.3 Void
B.2.2 Increased DL data, no Transport channel type switching Word‑p. 69
B.2.3 Decrease DL data, no Transport channel type switching Word‑p. 69
B.2.4 Decreased UL data, with switch from CELL_DCH to CELL_FACH Word‑p. 70
B.3 Examples of Transport Channel Reconfiguration Word‑p. 70
B.3.1 Increased UL data, with no transport channel type switching Word‑p. 70
B.3.1.1 RRC Parameters in Measurement Report Word‑p. 71
B.3.1.2 RRC Parameters in Transport Channel Reconfiguration Word‑p. 71
B.3.1.3 Void
B.3.2 Void
B.4 Examples of RB Reconfiguration Word‑p. 72
C Flow-chart of a Soft Handover algorithm Word‑p. 73
D Void
E Simulation results on DL Variable Rate Packet Transmission Word‑p. 75
E.1 Simulation assumption Word‑p. 75
E.2 Simulation results Word‑p. 75
F Simulation results on Adjustment loop Word‑p. 77
F.1 Simulation conditions Word‑p. 77
F.2 Simulation results Word‑p. 77
F.3 Interpretation of results Word‑p. 79
G Simulation results for CPCH Word‑p. 80
G.1 Simulation Assumptions Word‑p. 80
G.2 CPCH Channel Selection Algorithms Word‑p. 81
G.2.1 Simple CPCH channel selection algorithm Word‑p. 81
G.2.2 The recency table method Word‑p. 81
G.2.3 The idle-random method Word‑p. 81
G.3 Simulation Results Word‑p. 81
G.3.1 Cases A-B: Comparison of idle-random method and the recency method for 30 ms packet inter-arrival time, 480 bytes, and 6 CPCH channels, each @384 ksps Word‑p. 81
G.3.2 Case C-D-E: Comparison of the three methods for multiple CPCH Word‑p. 82
G.3.3 Cases E-F: Impact of packet inter-arrival time Word‑p. 84
G.3.4 Case G: Number of mobiles in a cell Word‑p. 85
G.3.5 Case H-I: Comparison of recency and idle-random methods for single CPCH Word‑p. 85
G.3.6 Case H and J: Comparison of single CPCH and multiple CPCH, idle-random at 2 Msps Word‑p. 86
G.4 Discussion on idle-AICH and use of TFCI Word‑p. 86
G.5 Recommended RRM Strategies Word‑p. 86
H Examples of RACH/PRACH Configuration Word‑p. 87
H.1 Principles of RACH/PRACH Configuration Word‑p. 87
I Example of PCPCH assignment with VCAM Word‑p. 89
J Examples of scheduling functions for HSDPA Word‑p. 91
J.1 Link adaptation Word‑p. 91
J.2 Priority scheduling functions Word‑p. 91
$ Change history Word‑p. 95
