2 WCDMA RAN Optional Features
2.2 Radio Network Functionality
2.3.1 FAJ 121 842: HSDPA Introduction
The HSDPA introduction is a group of functions that improve the system capabilities to handle DL PS data. The functionality provides significantly higher peak bit rates, higher system capacity, and at the same time, the round-trip delay in the network is reduced.
This feature requires radio node baseband HW that is HSDPA capable. For more information, refer to HSDPA User Plane.
2.3.2 FAJ 121 895: HSDPA TN Optimization
A flow control mechanism between the radio node and RNC adapts each user data flow to fit the allocated Iub Asynchronous Transfer Mode (ATM) Adaptation Layer type 2 (AAL2) path capacity for HSDPA traffic. When several users are connected, they all get a fair share of the allocated AAL2 bandwidth within their user service category.
For more information, refer to HSDPA Flow Control.
2.3.3 FAJ 121 906: HSDPA Interactive 64/HS RAB
This feature provides an interactive RAB for HSDPA with an UL 64 kbps bit rate and a DL maximum bit rate, depending on UE capability. Up to 15 codes are supported, and the number of codes that are allocated to the UE depends on the Radio Resource Management functionality, the cell and license configuration, and the UE capability. Both Quadrature Phase Shift Keying (QPSK) and 16 QAM are supported.
For more information, refer to Connection Handling.
2.3.4 FAJ 121 1097: Fast HSDPA Dynamic Power Allocation
The Fast HSDPA Dynamic Power Allocation feature enables the operator to provide high performance HSDPA on the same carrier as R99, with minimum impact on existing traffic.
For more information, refer to HSDPA User Plane.
2.3.5 FAJ 121 1303: HSDPA PS Streaming and Multiple PS Interactive
RAB Combination
This feature introduces the RABs for using HSDPA for QoS streaming together with two simultaneous interactive RABs. The supported streaming RABs are the 16/HS and 128/HS, that is DL streaming with the 16/HS and UL streaming with the 128/HS RAB. Together with the streaming RABs, two simultaneous interactive 64/HS RABs are also available.
This feature requires the following optional RAN features:
• FAJ 121 1083: HSDPA PS Streaming and PS Interactive RAB Combination • FAJ 121 1069: Two Times HSDPA PS Interactive RAB Combination For more information, refer to Connection Handling.
2.3.6 FAJ 121 1305: Speech 12.2 kbps, HSDPA PS Streaming and Multiple
PS Interactive RAB Combination
This feature is a combination of a conversational RAB for 12.2 kbps speech, a streaming RAB for both DL, and UL streaming based on HSDPA and two simultaneous PS interactive HSDPA RABs for PS data.
This feature requires the following optional RAN features:
• FAJ 121 1303: HSDPA PS Streaming and Multiple PS Interactive RAB Combination
• FAJ 121 1075: Speech 12.2 kbps and Two Times HSDPA PS Interactive RAB Combination
For more information, refer to Connection Handling.
2.3.7 FAJ 121 2870: Increased HSDPA Code Capacity on DUW
This feature changes the number of following HS codes for each HS-TXM: • From 30 to 60 codes for DUW 10, DUW 20, DUW 30, DUW 31, and DUW
41.
• From 30 to 90 codes for DUW 11.
This increases the peak rate for each HS-TXM. The most important benefit of this feature is improved HS throughput.
For more information, refer to Increased HSDPA Code Capacity on DUW.
2.3.8 FAJ 121 1318: Support for MIMO 2x2
The feature implements the 2x2 MIMO transmission scheme for High-Speed Physical Downlink Shared Channel (HS-PDSCH) as standardized in 3GPP Rel-7. ‘‘2x2’’ signifies that two transmitting antennas on the RBS and two receiving antennas on the UE are employed. With two parallel data streams transmitted to one UE unit, the peak bit rate for HS-DSCH is in theory doubled. This feature requires the following optional RAN features:
• FAJ 121 1510: Pre-Coder for Power Balancing or FAJ 121 1128: TX Diversity
For more information, refer to HSDPA User Plane.
2.3.9 FAJ 121 1320: SRB on HSDPA
The SRB on HSDPA feature allows the establishment and support of the DL Signaling Radio Bearer (SRB) on the HS-DSCH. All DL signaling is faster and time is decreased for RAB establishment and other transitions.
This feature requires the following optional RAN features: • FAJ 121 1033: HSDPA Introduction Package
• FAJ 121 1481: F-DPCH
For more information, refer to Connection Handlingand HSDPA Migration and Activation.
2.3.10 FAJ 121 1382: HSPA QoS Scheduling Priority Based on ARP
This feature gives the operator the possibility to allow the ARP parameters received from the CS and PS CNs influence the prioritization of the HSPA radio connection in WRAN. The operator is offered a mechanism for increased priority differentiation.
The ARP RAB parameters received from the CN (RANAP) influence the scheduling priority for HSPA connections. This feature is an extension or addition to the existing QoS mapping functions. The feature can be enabled or disabled for UL and DL separately, and supports both PS and CS networks. A precondition for this feature is that the existing FAJ 121 1093: Flexible QoS and Allocation/Retention handling feature is active.
This feature requires the basic RAN feature FAJ 121 1093: Flexible QoS and Allocation/Retention handling.
For more information, refer to QoS Configuration and QoS Handling.
2.3.11 FAJ 121 1439: Minimum Bit Rate HSDPA Scheduling
The feature provides the possibility to offer a premium mobile broadband interactive data service, typically a premium internet service, to a portion of their customers. With this premium interactive data service, the user is likely to get this minimum bit rate also in high load situations, in addition to the normal higher data rates in the more normal or light loaded cases.
This feature requires the optional RAN feature FAJ 121 1094: Traffic Handling Priority to be activated.
For more information, refer to HSDPA User plane and HSDPA Migration and Activation.
2.3.12 FAJ 121 1441: Multi Carrier
The Multi Carrier (corresponds to Dual-Cell HSDPA operation in the 3GPP Release 8 standard) enables simultaneous DL HS-DSCH transmission to the UE from two cells, with adjacent carriers. The DL L1 data rate for the UE in Multicarrier (MC) mode is increased by a factor of two throughout the sector. Specifically, the HS-PDSCH peak bit rate in MC mode, exploiting 64 QAM and 15 codes on each carrier, equals 43.2 Mbps. This corresponds to a L1 transport block bit rate of 42.2 Mbps.
This feature requires the following optional RAN features: • FAJ 121 1328: Enhanced Layer 2
• FAJ 121 1023: Enhanced Uplink Introduction Package For more information, refer to HSDPA Migration and Activation.
2.3.13 FAJ 121 1445: Multi Carrier Inactivity Control
The feature provides a mechanism for deactivation or activation of the secondary serving HS-DSCH cells based on user data activity, to limit battery consumption for UE units in MC mode.
For FAJ 121 3909: HSDPA Multi-Carrier 3 Carriers or FAJ 121 3920: Dual-Band HSDPA Multi-Carrier 3 Carriers, activating or deactivating one secondary serving cell only is not possible. During deactivation, both secondary serving HS-DSCH cells are deactivated, and during activation, both secondary serving HS-DSCH cells are activated.
This feature requires the optional feature FAJ 121 1441: Multi Carrier to be activated.
For more information, refer to HSDPA Migration and Activation.
2.3.14 FAJ 121 1467: HSDPA Inter-Frequency Load Sharing
The HSDPA Inter-Frequency Load Sharing feature enables the division of HSDPA users between several HSDPA-enabled carriers, based on operator configurations. Multi Carrier, Dual-Band Multi-Carrier, MIMO and EUL capabilities are also considered. The load on HSDPA is measured as the number of users. This feature is triggered when a user sets up an RAB on HSDPA or sets the channel switching to HSDPA.
This feature requires the optional RAN feature FAJ 121 405: Inter Frequency Handover and Cell Reselection.
This feature includes following improvements:
• Consideration of EUL congestion state at IFLS decisions
This enhancement requires optional feature FAJ 121 1584: UL efficiency - DCH/EUL Load Balancing.
• Recalculation of margin parameter UtranCell::hsIflsMarginUsers in congested situations
• Reattempting load sharing evaluations for lower capabilities in congested cases
• More coverage-relations (up to eight), and path loss threshold for each relation
• Improved cell load measurements and the introduction of an Ec/No threshold for IFLS features triggered from the FACH/URA state. For more information, refer to Load Sharing.
2.3.15 FAJ 121 1481: F-DPCH
The feature introduces a new downlink physical channel, F-DPCH, replacing A-DPCH when SRB is transmitted on HSDPA. F-DPCH is used for sending only Transmit Power Control (TPC) bits in the DL to control UL power. With the UE capability to support Fractional DPCH, the DL channelization code consumption and, to some extent, also the DL power consumption of HSDPA connection is reduced.
This feature requires the optional feature FAJ 121 1320: SRB on HSDPA. For more information, refer to Connection Handling and HSDPA Migration and Activation.
2.3.16 FAJ 121 1490: Dual-Band HSDPA Multi-Carrier
This feature corresponds to Dual-Band HSDPA (DB-HSDPA) in the 3GPP Rel-9 standard and introduces support for DL MC, with or without 64 QAM, using two carriers in different frequency bands. Therefore, simultaneous DL HS-DSCH transmission from two cells with carriers in different frequency bands is supported by a given UE unit.
For a given connection the following are required:
• The two carriers must have the same 64 QAM configuration, that is, if one carrier is configured with 64 QAM and the other carrier cannot be configured without 64 QAM.
• DB-HSDPA-MC is only used with EUL (2 ms or 10 ms TTI).
• DB-HSDPA-MC cannot be combined with MIMO or HSDPA Multi-Carrier with MIMO.
This feature requires the following RAN features: • FAJ 121 1328: Enhanced Layer 2
• FAJ 121 1331: Support for 64 QAM
• FAJ 121 1023: Enhanced Uplink Introduction Package, for serving HS-DSCH cells.
For more information, refer to Connection Handling and HSDPA User Plane. For information about activation and deactivation, refer to HSDPA Migration and Activation.
2.3.17 FAJ 121 1492: HSDPA Multi-Carrier with MIMO
This feature corresponds to DC-HSDPA with MIMO (DC-MIMO) in the 3GPP Rel-9 standard. The feature introduces support for HSDPA Multi-Carrier, with or without 64 QAM, with MIMO using two adjacent carriers. This means that simultaneous DL HS-DSCH transmission using MIMO from two cells, with adjacent carriers, is supported to a given UE unit.
For a given connection:
• The two carriers must have the same MIMO (and 64 QAM) configuration, that is if one carrier is configured with MIMO (or 64 QAM), the other carrier cannot be configured without MIMO (or 64 QAM).
• HSDPA-MC+MIMO is only used with Enhanced L2.
• HSDPA-MC+MIMO is only used with EUL (2 ms TTI or 10 ms TTI). For more information, refer to Connection Handling and HSDPA User Plane. For information about activation and deactivation, refer to HSDPA Migration and Activation.
2.3.18 FAJ 121 1515: HSDPA RBR QoS Profiling
The feature enables the QoS to differentiate between HSDPA users. With the use of the OSS, gold, silver, and bronze HSDPA users are given different relative bit rates, when the Transport Network (TN) limits the HSDPA traffic. The maximum gold or bronze factor is 10. The operator can also configure hsRbrWeight parameter for each SPI separately.
This feature requires the following features: • FAJ 121 1033: HSDPA Introduction Package • FAJ 121 1094: Traffic Handling Priority
For more information, refer to HSPA QoS Profiling.
2.3.19 FAJ 121 1537: High Speed Downlink for FACH
This feature provides a wider and more dynamic bandwidth for UE in the CELL_FACH state. For UE that supports HS-FACH, the DL FACH transport channel is replaced by the HS-DSCH transport channel.
This affects not only the transport of DL user data for UE in the CELL_FACH state, but also signaling on the FACH channel, for example at RRC
establishment. No UL HS-DPCCH channel exists, so no HARQ or Channel Quality Indicator (CQI) reporting is sent back to the Node B. The UL is unchanged, that is, the RACH channel is used.
The Device Optimized HS-FACH/EUL-FACH improvement allows the operator to configure the network to prevent certain types of UE from entering
CELL_FACH and URA_PCH states. It also allows the RNC to multicast the RRC Connection Setup and RRC Connection Reject messages to both R99 FACH and HS-FACH.
This mechanism can prevent Key Performance Indicator (KPI) degradation caused by non-3GPP-compliant UE when High-Speed Downlink for FACH is enabled.
For more information, refer to High Speed Downlink for FACH.
2.3.20 FAJ 121 1592: Battery Efficiency for High-Speed FACH
This feature enables UE units that are in CELL_FACH state to save battery by not decoding the HS-SCCH channel continuously. DRX patterns are introduced that determine when the UE receiver is turned on or off in CELL-FACH state. In 3GPP, this feature is called Enhanced UE DRX. The function is described in the Rel-8 version of the 3GPP specifications.
This feature requires the optional RAN feature FAJ 121 1537: High-Speed Downlink for FACH to be activated.
For more information, refer to Battery Efficiency for High Speed FACH.
2.3.21 FAJ 121 1673: Channel Element Capacity for HSDPA Smartphones
This radio node feature provides a more efficient UL CE ladder for the DCH. The UL CE cost is reduced by a factor of 2 for DCH UL SFs: 4, 8, 16, 32.
For more information, refer to Capacity Management.
For information about activation and deactivation, refer to HSDPA Migration and Activation.
2.3.22 FAJ 121 2709: HSDPA MC Inter DU Joint Scheduling
Introduction of HSDPA MC Inter DU Joint Scheduling provides support of MC between any of the carriers configured in a radio node.
Note: HSDPA MC Inter DU Joint Scheduling provides only a new HSDPA architecture that enables the MC. The radio node is not yet MC-capable with this feature activated. To use the MC in the RAN network, one of the following features must be activated:
• FAJ 121 1441: HSDPA Multi Carrier
• FAJ 121 1490: Dual Band HSDPA Multi Carrier • FAJ 121 1492: HSDPA Multi Carrier with MIMO
The optional feature FAJ 121 1491: EUL Multi-Carrier is only partly supported together with HSDPA MC Inter DU Joint Scheduling, see Configuring HSDPA and EUL for details.
For more information, refer to HSDPA MC Inter DU Joint Scheduling.
2.3.23 FAJ 121 3426: Inter Frequency Load Sharing at Down Switch
This feature enables redirecting a UE unit to another frequency or cell, triggered either by inactivity downswitches to FACH or URA states, or by Fast Dormancy. In each cell, the possible configuration can be either to trigger HS IFLS at downswitch, or to configure a specific frequency, to which the UE is redirected at downswitch.
If the feature is configured to trigger HS IFLS at downswitch, it depends on the legacy HS IFLS feature (FAJ 121 1467). If the feature aims to configure a specific frequency, it does not depend on any other features.
For more information, refer to Load Sharing and Inter Frequency Load Sharing at Downswitch.
2.3.24 FAJ 121 3698: HSDPA Dynamic Power Sharing
Feature HSDPA Dynamic Power Sharing provide the possibility to have HS power sharing between cells, sharing radio units (radio building block), for example cells that transmit in the same geographical area (sector). With the feature, the unused HS-DSCH transmission power in a cell can be applied as
additional HS-DSCH transmission power in another cell that is power-limited, without exceeding the Power Amplifiers (PAs) power capability.
For more information, refer to HSDPA Dynamic Power Sharing.
2.3.25 FAJ 121 3909: HSDPA Multi-Carrier 3 Carriers
HSDPA Multi-Carrier 3 Carriers is an optional feature that corresponds to 4C-HSDPA in the 3GPP Rel-10 standard. The feature introduces support for HSDPA Multi-Carrier, with or without 64 QAM, using three adjacent carriers. This means that simultaneous DL HS-DSCH transmission (with or without 64 QAM) from three cells, with adjacent carriers, is supported to a given UE unit. The three cells are located in the same radio node and cover the same geographical area, that is, they are in the same sector.
This feature requires the following optional RAN features: • FAJ 121 1441: Multi Carrier
• FAJ 121 1328: Enhanced Layer 2
• FAJ 121 2709: HSDPA MC Inter DU Joint Scheduling • FAJ 121 1023: Enhanced Uplink Introduction Package For more information, refer to HSDPA Multi-Carrier 3 Carriers.
2.3.26 FAJ 121 3920: Dual-Band HSDPA Multi-Carrier 3 Carriers
The DB-HSDPA-3MC feature is an optional feature that corresponds to 4C-HSDPA in the 3GPP Rel-10 standard. The feature introduces support for Dual Band HSDPA Multi-Carrier on three carriers, with or without 64 QAM, using carriers in two separate frequency bands. This means that simultaneous DL HS-DSCH transmission (with or without 64 QAM) from three cells, with carriers in two frequency bands, is supported by a given UE unit. The three cells are located in the same radio node and cover the same geographical area, that is, they are in the same sector.
This feature requires the following optional RAN features: • FAJ 121 1441: Multi Carrier (conditionally needed) • FAJ 121 1328: Enhanced Layer 2
• FAJ 121 2709: HSDPA MC Inter DU Joint Scheduling • FAJ 121 1023: Enhanced Uplink Introduction Package • FAJ 121 1490: Dual-Band HSDPA Multi-Carrier