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bf400c609838285a1af268db3408eb49 | 102 024-7 | 6.6 Examples with respect to packet loss | This is for further study. |
bf400c609838285a1af268db3408eb49 | 102 024-7 | 6.7 Interpretation of the results | All calculation results presented in the present document should be seen in conjunction with the "Judgement of a connection on a linear quality scale" as given in figure 41: high quality medium quality low quality 100 90 80 70 60 50 linear quality scale Overall Rating "R" Area not recommended Figure 41: Judgement of a ... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 1 Scope | The present document evaluates the possibility of using packet access mode for satellite. The objective of the present document is to design and demonstrate the realistic feasibility of the packet access mode transmission over satellite and its applications, which eventually will lead to the specifications for this typ... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 2 References | For the purposes of this Technical Report (TR), the following references apply: [1] ETSI TR 101 112 (V3.1.0): "Universal Mobile Telecommunications System (UMTS); Selection procedures for the choice of radio transmission technologies of the UMTS (UMTS 30.03 version 3.1.0)". [2] E. Lutz, D. Cygan, M. Dippold, F. Dolainsk... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 3 Definitions and abbreviations | |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 3.1 Definitions | For the purposes of the present document, the following terms and definitions apply: broadcatching: communication capability which denotes an unidirectional distribution from all users connected to the network a single source Whilst broadcasting generally consist of a one_to_ many flow of information, broadcatching con... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 3.2 Abbreviations | For the purposes of the present document, the following abbreviations apply: 2G/3G 2nd/3rd Generation 3GnetSim 3rd Generation Network Simulator 3GPP 3rd Generation Partnership Project AAL5 ATM Adaptation Layer 5 AC Admission Control ACK ACKnowledgment Acpt Acceptance AI Acquisition Indicator AICH Acquisition Indicator ... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4 Project descriptions | |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4.1 ESA/ATB | |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4.1.1 ATB packet access | This contribution summarizes some of the activities on packet access performed in the frame of Phase I of the ESA contract "Advanced S-UMTS Test Bed" (ATB, ESA Contract No. 15208). The results here reported are then the outcome of the work performed by several companies in the ATB team under the ESA guidance. ATB Phase... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4.1.2 ATB investigation on multicast/narrowcast | This contribution summarizes the activities on multicast and narrowcast in the frame of Phase 1 of the ESA contract "Advanced S-UMTS Test Bed" (ATB, ESA Contract No. 15208). Multicast, broadcast and narrowcast are all applications which fit well for satellite applications due to the inherent one-to-many structure of sa... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4.2 IST/SATIN studies/project description | SATIN, a project bringing together seven partners from five different EU member countries, commenced its activities in January 2001 with the following specific objectives: • Identify the suitable service scenarios for S-UMTS through market and business analysis. • Propose a closely integrated S/T-UMTS architecture cons... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4.2.1 Main constraints and requirements on SATIN access | The SATIN access scheme is based on the following major constraints and requirements: • No Packet Data Protocol (PDP) messaging between User Equipment (UE) and Satellite Radio Network Controller (Satellite-RNC). • Compliance with the current core requirements of the Multimedia Broadcast/Multicast Service (MBMS) as spec... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4.2.2 SATIN key issues | This clause will highlight the issues deemed as critical for an effective S-UMTS packet mode implementation, hence requiring particular care in the specification, simulation and evaluation phases of the air interface development. |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4.2.3 Layer 2 and L2+ key issues | • QoS handling that address possible alternatives in the QoS mapping and QoS ranking (priority handling of the multiple services/flux based on QoS parameters, e.g. traffic priority). • Radio resource management, that encompasses admission control and load control, which interact with the Packet Scheduler element and mo... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4.2.4 Layer 1 key issues | • Forward link Transport/Physical channels for MBMS The FACH channel is selected to be the most suitable channel for the SATIN access scheme. The DSCH could prove to be an appropriate channel, but the operation would require substantial modifications of the T-UMTS standards, whereas the FACH can be used with only minor... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4.2.5 Service provision principles for MBMS | SATIN service access is based on the main phases of MBMS provision [15], as illustrated in Figure 1: 1.Subscription 3.Activation 2.Service announcement 4.Bearer set up 6.Data transfer 5.Notification 7.Bearer release 3.Joining 8.Deactivation 8.Leaving Multicast Multicast Broadcast Broadcast Figure 1: SATIN service provi... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4.3 ESA-3GNetSim | |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4.3.1 Objective | The main objective of the 3GnetSim is to design, develop and validate a modular and efficient radio access network simulator for third generation mobile satellite systems to carry out simulation runs with a view to optimize the simulated system. Based on a thorough analysis of the simulation results that activity shall... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4.3.2 Target system architecture | The target scenario of the simulator shall include GEO satellites with multiple spot beams. In order to reduce the bandwidth consumption in the feeder links, several GW stations shall be foreseen. The hierarchy principle in UMTS, which assigns to each Node B exactly one RNC and to each RNC exactly one SGSN implies a fi... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4.3.3 General concept of the simulator | The 3G Network Simulator to be developed shall cover a broad spectrum of simulation scenarios. The addressed simulation scenarios determine the required simulator functionality, ranging from detailed simulations of the radio access network (PHY, MAC, RLC, RRC), Iu protocols and CN procedures to the detailed modelling o... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4.4 GAUSS project | GAUSS is a Research and Technological Development project co-funded by European Commission, within the frame of the Information Society Technologies (IST) V Programme. It is a two-year project, starting from December 2000, and successfully completed. GAUSS objective was to design and demonstrate the feasibility of a sy... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 4.4.1 GAUSS Services | GAUSS main rationales rely on the feasibility of a solution for the provision of high quality Location-Based services, characterized by: • high integrity/continuity positioning and guarantee of performance for navigation; • highly reliable and available communications, featuring small latency with low-rate data transmi... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 5 Conclusion and recommendation of the projects | Table 1 highlights the different key issues/founding covered in the projects. The ISO layer approach was used as a general framework. Table 1: Key Issues of the different Projects |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 5.1 ATB conclusions on unicast | Based on the studies performed in the frame of the ESA ATB study, a solution for packet access in SW-CDMA can be proposed. Particular emphasis was given to a GEO scenario. However the solutions proposed were also suitable for other constellation scenarios, like LEO. For the unicast case in particular, open loop power c... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 5.2 ATB conclusions on multicast/narrowcast | Multicast, broadcast and narrowcast are all applications which fit well for satellite applications due to the inherent one-to-many structure of satellite communication systems. This paper therefore has investigated the application of these techniques to satellite systems. ETSI ETSI TR 102 061 V1.1.1 (2004-05) 31 The go... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 5.3 SATIN project conclusions | The SATIN project defines a new integrated role for satellite systems to deliver multicast/broadcast services to users. This makes use of the best attributes of the satellite systems and relives the terrestrial cellular systems from one of their biggest drawbacks - it is thus a win-win situation. In addition it makes m... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 5.4 3GNetSim | As the 3GnetSim project was in the implementation phase when its contributions were provided to the Working Group, no conclusions about the performance of the envisaged concepts were possible at this stage of the project. It is expected that quantitative results from simulator optimization runs will be available in Apr... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 5.5 Conclusions from the GAUSS project | The GAUSS system design has an open and flexible architecture, based on the adoption of current standards and consolidated technologies. This represents one of the challenging aspects of the GAUSS system: flexibility and conformity to widely adopted standards, while reducing design and development risks and costs, guar... |
f5a2513fed1fd1fc54a6f48c60c8267c | 102 061 | 6 Conclusion and further work | The present document gathers the results presented in five technical contributions to the ETSI SES-UMTS WG. The reasonable step forward at this point will be to try to converge in a set of technical recommendations, that will eventually lead to a set of technical specifications for the packet access mode in the satelli... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 1 Scope | The present document evaluates the feasibility to use the W-CDMA UTRA FDD as a Satellite Radio Interface. The Technical Specifications for the W-CDMA UTRA FDD has been developed in the framework of the third Generation Partnership Project (3GPP). This analysis is based on the Release 99 as defined in [10] to [31]. The ... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 2 References | For the purposes of this Technical Report (TR), the following references apply: [1] ITU-R Recommendation M.1225: "Guidelines for evaluation of Radio Transmission technology for the International Mobile Telecommunications-2000 (IMT-2000)". [2] ITU-R Recommendation M.1455: "Key characteristics for the radio interfaces of... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 3 Definitions, symbols and abbreviations | |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 3.1 Definitions | For the purposes of the present document, the following terms and definitions apply: cell: geographical area under Intermediate Module Repeater coverage downlink: unidirectional radio link for the transmission of signals from a satellite to a UE forward link: unidirectional radio link for the transmission of signals fr... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 3.2 Symbols | For the purposes of the present document, the following symbols apply: or c I E DPCH _ ratio of the transmit energy per PN chip of the DPCH to the total transmit power spectral density at the Node B antenna connector t b N E ratio of combined received energy per information bit to the effective noise power spectral den... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 3.3 Abbreviations | For the purposes of the present document, the following abbreviations apply: ACLR Adjacent CHannel Leakage Ratio AI Acquisition Indicator AICH Acquisition Indicator CHannel AWGN Additive White Gaussian Noise BCCH Broadcast Control CHannel BCH Broadcast CHannel BER Bit Error Rate BLER Block Error Ratio BMC Broadcast/Mul... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 4 Satellite UMTS | |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 4.1 System architecture | Satellite UMTS (S-UMTS) addresses User Equipment (UE) fully compatible with 3GPP UTRA FDD mode (W-CDMA), with adaptation for agility to the Mobile Satellite Service (MSS) frequency band. RNS 3GPP core network FMSS FFSS FMSS orFFSS FMSS Terrestrial repeater Node B Node B RNC (optional) UE Gateway Uu Iub Iu Uu/ Iub Uu Fi... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 4.2 Frequency bands | |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 4.2.1 Service link | The frequency bands are allocated in the IMT-2000 MSS band: • 1 980 MHz to 2 010 MHz for the earth-to-space direction (UE uplink transmission to the satellite); • 2 170 MHz to 2 200 MHz for the space-to-earth direction (UE downlink reception from the satellite). These frequency bands are adjacent to the terrestrial UMT... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 4.2.2 Feeder links | The present document does not intend to specify feeder links. Nevertheless, some frequency bands are given for indication. The gateway to satellite feeder link is intended to be operated in the 27,5 GHz to 30 GHz band. ETSI ETSI TR 102 058 V1.1.1 (2004-11) 15 Depending on the IMR configuration, the satellite to IMR fee... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 4.3 Satellite system configuration | The system is able to cope with several satellite constellation types, i.e. LEO, HEO, MEO or GEO. It is out of the scope of the present document to restrict the satellite system configuration. Nevertheless, in order to present realistic deployment scenarios, the present document focuses on the GEO constellation type. S... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 4.3.1 Global beam architecture | The global beam architecture provides an overall throughput of 3,84 Mb/s over Europe shared among 2 FDMs. For instance, if 384 kbps service is provided, each FDM carries a maximum of 5 channel codes. Each FDM occupies 5 MHz bandwidth among MSS frequency band. Satellite performances are summarized in table 4.1. ETSI ETS... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 4.3.2 Multi-beam architecture | Satellite performances are summarized in table 4.2. Table 4.2: Satellite 7 multi-beam architecture 7 Multibeam Number of spot beams 7 Downlink (satellite to UE) Frequency (satellite to UE) MHz 2 170 - 2 200 Polarization LHCP or RHCP On board EIRP per carrier dBW From 64 to 74 (see note) Uplink Frequency (UE to satellit... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 4.3.3 Extended multi-beam architecture | Table 4.3: Satellite extended multi-beam architecture Extended Multibeam Number of spot beams 30 Downlink (satellite to UE) Frequency (satellite to UE) MHz 2 170 - 2 200 Polarization LHCP or RHCP On board EIRP per carrier dBW 74 Uplink Frequency (UE to satellite) MHz 1 980 - 2 010 Polarization LHCP or RHCP Rx Antenna G... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 4.4 User Equipment (UE) | User Equipment (UE) may be of several types: • 3G standardized handset: the use in satellite environment requires adaptation for frequency agility to the MSS band. The basic assumption is UE power class 1, 2 and 3, equipped with standard omni-directional antenna. • Portable: the portable configuration is built with a n... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 4.5 Intermediate Module Repeater (IMR) | Two kinds of architecture can be envisaged: • "On channel" repeaters: use the same band for signal reception and retransmission. The gain is limited to around 80 dB to avoid self-oscillation and offer narrow coverage. • "Non on-channel" repeaters: use different frequency bands for signal reception and retransmission. T... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5 W-CDMA Satellite Radio Interface | This clause gives a description of the W-CDMA as applicable to the satellite environment. |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.1 General description | |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.1.1 W-CDMA key features | Listed below are the key service and operational features of the W-CDMA radio-interface: • Support for low data rate services (e.g. 1,2 kbps) up to high-data-rate transmission (384 kbps) with wide-area coverage. • High service flexibility with support of multiple parallel variable-rate services on each connection. • Ef... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.1.2 Key technical characteristics | Table 5.1: Key technical characteristics Multiple-Access scheme DS-CDMA Duplex scheme FDD Chip rate 3,840 Mcps Carrier spacing 5 MHz (200 kHz carrier raster) Frame length 10 ms Inter-spot synchronization No accurate synchronization needed Multi-rate/Variable-rate scheme Variable-spreading factor + Multi-code Channel co... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.1.3 Radio Interface Protocol Architecture | Radio Interface protocol stack is extracted from TS 125 301 [18]. L3 control control control control Logical Channels Transport Channels C-plane signalling U-plane information PHY L2/MAC L1 RLC DC Nt GC L2/RLC MAC RLC RLC RLC RLC RLC RLC RLC Duplication avoidance UuS boundary BMC L2/BMC control PDCP PDCP L2/PDCP DC Nt ... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.2 Channel structure | The channel structure is the same as in TS 125 301 [18]. It is described here for clarification. ETSI ETSI TR 102 058 V1.1.1 (2004-11) 21 |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.2.1 Logical channels | The following logical channel types are defined [18]: • Common CHannels: - Broadcast Control CHannel (BCCH); - Paging Control CHannel (PCCH); - Random-Access CHannel (RACH); - Common Control CHannel (CCCH); - Common Traffic CHannel (CTCH). • Dedicated Channels: - Dedicated Control CHannel (DCCH); - Dedicated Traffic CH... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.2.1.1 Control channels | BCCH - Broadcast Control Channel (DL) The Broadcast Control CHannel (BCCH) is a downlink point-to-multipoint channel that is used to broadcast system- and spot-specific information. The BCCH is always transmitted over the entire spot. PCCH - Paging Control Channel (DL) The Paging Control CHannel (PCCH) is a downlink ch... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.2.1.2 Traffic channels | Traffic channels are used for the transfer of user plane information only. DTCH - Dedicated Traffic Channel A Dedicated Traffic CHannel (DTCH) is a point-to-point channel, dedicated to one UE, for the transfer of user information. A DTCH can exist in both uplink and downlink. CTCH - Common Traffic Channel A point-to-mu... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.2.2 Transport channels | Transport channels are classified into two groups: • common transport channels, where there is a need for inband identification of the UEs when particular UEs are addressed; • dedicated transport channels, where the UEs are identified by the physical channel, i.e. code and frequency. To each transport channel, there is... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.2.2.1 Common Transport channels | Common transport channels are: BCH - Broadcast Channel A downlink channel used for broadcast of system information into an entire spot. PCH - Paging Channel A downlink channel used for broadcast of control information into an entire spot allowing efficient UE sleep mode procedures. Currently identified information type... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.2.2.2 Dedicated Transport channels | DCH - Dedicated Channel A channel dedicated to one UE used in uplink or downlink. |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.2.3 Logical to Transport channels mapping | The mappings as seen from the UE and UTRAN sides are shown in Figure 5.2 and Figure 5.3 respectively. ETSI ETSI TR 102 058 V1.1.1 (2004-11) 23 BCH PCH DSCH FACH RACH DCH BCCH SAP DCCH SAP CCCH- SAP PCCH SAP DTCH SAP Transport Channels MAC CPCH CTCH SAP Logical Channels Figure 5.2: Logical channels mapped onto transport... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.2.4 Mapping and association of physical channels | |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.2.4.1 Mapping of Transport channels onto Physical channels | Transport Channels DCH RACH CPCH BCH FACH PCH DSCH Physical Channels Dedicated Physical Data Channel (DPDCH) Dedicated Physical Control Channel (DPCCH) Physical Random Access Channel (PRACH) Physical Common Packet Channel (PCPCH) Common Pilot Channel (CPICH) Primary Common Control Physical Channel (P-CCPCH) Secondary C... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.2.4.2 Association of physical signals | Physical Signals PRACH preamble part PCPCH access preamble part PCPCH CD/CA preamble part PCPCH power control preamble part Physical Channels Physical Random Access Channel (PRACH) Physical Common Packet Channel (PCPCH) Figure 5.5: Physical channel and physical signal association ETSI ETSI TR 102 058 V1.1.1 (2004-11) 2... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3 Physical channel structure | |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.1 Downlink physical channels | |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.1.1 Dedicated physical channels | There are two types of dedicated physical channels, the Dedicated Physical Data CHannel (DPDCH) and the Dedicated Physical Control CHannel (DPCCH). DPDCH is used to carry dedicated data generated at layer 2 and above, i.e. the dedicated transport channels. DPCCH is used to carry control information generated at layer 1... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.1.1.1 Frame structuret | Each frame of length 10 ms is split into 15 slots, each of length Tslot = 0,666 ms (2 560 chips). Within each slot, DPDCH and DPCCH are time multiplexed. Power control periods do not match fast fading correction due to satellite propagation time. Nevertheless, slot structure is kept unchanged in order to reduce modific... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.1.1.2 DL-DPCCH for CPCH | The downlink DPCCH for CPCH is a special case of downlink dedicated physical channel of the slot format #0 in Table 5.2. The spreading factor for the DL-DPCCH is 512. The frame structure of DL-DPCCH for CPCH is depicted in figure 5.7. One radio frame, Tf = 10 ms TPC NTPC bits Slot #0 Slot #1 Slot #i Slot #14 Tslot = 25... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.1.2 Common physical channels | |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.1.2.1 Common Pilot CHannel (CPICH) | The Common Pilot CHannel (CPICH) is a fixed rate (30 kbps, SF = 256) downlink physical channel that carries a pre-defined bit/symbol sequence. Pre-defined symbol sequence Slot #0 Slot #1 Slot #i Slot #14 Tslot = 2560 chips , 20 bits = 10 symbols 1 radio frame: Tf = 10 ms Figure 5.8: Frame structure of CPICH Two types o... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.1.2.2 Synchronization CHannel (SCH) | The Synchronization CHannel (SCH) is a downlink signal used for spot search. The SCH consists of two sub-channels, the Primary and Secondary SCH. The 10 ms radio frames of the Primary and Secondary SCH are divided into 15 slots, each of length 2 560 chips. ETSI ETSI TR 102 058 V1.1.1 (2004-11) 28 Primary SCH Secondary ... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.1.2.3 Primary Common Control Physical CHannel (P-CCPCH) | The Primary CCPCH is a fixed rate (30 kbps, SF = 256) downlink physical channels used to carry the BCH transport channel. The Primary CCPCH is not transmitted during the first 256 chips of each slot. Instead, Primary SCH and Secondary SCH are transmitted during this period. Data Ndata1=18 bits Slot #0 Slot #1 Slot #i S... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.1.2.4 Secondary Common Control Physical CHannel (S-CCPCH) | The Secondary CCPCH is used to carry the FACH and PCH. There are two types of Secondary CCPCH: those that include TFCI and those that do not include TFCI. The set of possible rates for the Secondary CCPCH is the same as for the downlink DPCH. ETSI ETSI TR 102 058 V1.1.1 (2004-11) 29 Slot #0 Slot #1 Slot #i Slot #14 Tsl... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.1.2.5 Paging Indicator CHannel (PICH) | The Paging Indicator CHannel (PICH) is a fixed rate (SF = 256) physical channel used to carry the paging indicators. The PICH is always associated with an S-CCPCH to which a PCH transport channel is mapped. One PICH radio frame of length 10 ms consists of 300 bits. Of these, 288 bits are used to carry paging indicators... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.1.2.6 Physical Downlink Shared CHannel (PDSCH) | The Physical Downlink Shared CHannel (PDSCH) is used to carry the Downlink Shared CHannel (DSCH). A PDSCH is allocated on a radio frame basis to a single UE. Within one radio frame, UTRAN may allocate different PDSCHs under the same PDSCH root channelization code to different UEs based on code multiplexing. Within the ... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.1.2.7 Acquisition Indicator CHannel (AICH) | The Acquisition Indicator channel (AICH) is a fixed rate (SF = 256) physical channel used to carry Acquisition Indicators (AI). Acquisition Indicator AIs corresponds to signature s on the PRACH. The AICH consists of a repeated sequence of 15 consecutive access slots (AS), each of length 5 120 chips. Each access slot co... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.1.2.8 CPCH Access Preamble Acquisition Indicator CHannel (AP-AICH) | The Access Preamble Acquisition Indicator channel (AP-AICH) is a fixed rate (SF = 256) physical channel used to carry AP acquisition indicators (API) of CPCH. AP acquisition indicator APIs corresponds to AP signature s transmitted by UE. AP-AICH and AICH may use the same or different channelization codes. The phase ref... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.1.2.9 CPCH Collision Detection/CHannel Assignment Indicator CHannel (CD/CA-ICH) | The Collision Detection CHannel Assignment Indicator channel (CD/CA-ICH) is a fixed rate (SF = 256) physical channel used to carry CD Indicator (CDI) only if the CA is not active, or CD Indicator/CA Indicator (CDI/CAI) at the same time if the CA is active. CD/CA-ICH and AP-AICH may use the same or different channelizat... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.1.3 Spreading and modulation | Data modulation is QPSK where each pair of two bits are serial-to-parallel converted and mapped to the I and Q branch respectively. The I and Q branch are then spread to the chip rate with the same channelization code cch and subsequently scrambled by the same spot specific scrambling code cscramb. ETSI ETSI TR 102 058... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.2 Uplink Physical channels | |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.2.1 Uplink dedicated physical channels | For the uplink, the DPDCH and the DPCCH are I/Q code multiplexed within each radio frame and transmitted with dual-channel QPSK modulation. Each additional DPDCHs is code multiplexed on either the I- or the Q-branch with this first channel pair. ETSI ETSI TR 102 058 V1.1.1 (2004-11) 35 |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.2.1.1 Frame structure | Figure 5.22 shows the principle of frame structure of the uplink dedicated physical channels. Each frame of length 10 ms is split into 15 slots, each of length Tslot = 0,666 ms (2 560 chips), corresponding to one power-control period. Within each slot, the DPDCH and the DPCCH are transmitted in parallel. Pilot Npilot b... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.2.1.2 Spreading and modulation | The DPCCH is spread to the chip rate by the channelization code cc, while the n:th DPDCH called DPDCHn is spread to the chip rate by the channelization code cd,n. One DPCCH and up to six parallel DPDCHs can be transmitted simultaneously, i.e. 1 ≤ n ≤ 6. After channelization, the real-valued spread signals are weighted ... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.2.2 Physical Random Access CHannel (PRACH) | |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.2.2.1 Overall structure of random-access transmission | The random-access transmission is based on a Slotted ALOHA approach with fast acquisition indication. The UE can start the random-access transmission at the beginning of a number of well-defined time intervals, denoted access slots. There are 15 access slots per two frames and they are spaced 5 120 chips apart. #0 #1 #... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.2.2.2 PRACH preamble part | Each preamble is of length 4 096 chips and consists of 256 repetitions of a signature of length 16 chips. |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.2.2.3 PRACH message part | The 10 ms message part radio frame is split into 15 slots, each of length Tslot = 2 560 chips. Each slot consists of two parts, a data part to which the RACH transport channel is mapped and a control part that carries Layer 1 control information. The data and control parts are transmitted in parallel. A 10 ms message p... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.2.3 Physical Common Packet CHannel (PCPCH) | |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.2.3.1 CPCH transmission | The CPCH transmission is based on DSMA-CD approach with fast acquisition indication. The UE can start transmission at the beginning of a number of well-defined time-intervals, relative to the frame boundary of the received BCH of the current spot. The access slot timing and structure is identical to RACH. The PCPCH acc... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.2.3.2 CPCH access preamble part | Similar to RACH preamble part. The RACH preamble signature sequences are used. The number of sequences used could be less than the ones used in the RACH preamble. The scrambling code could either be chosen to be a different code segment of the Gold code used to form the scrambling code of the RACH preambles or could be... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.2.3.3 CPCH collision detection preamble part | Similar to RACH preamble part. The RACH preamble signature sequences are used. The scrambling code is chosen to be a different code segment of the Gold code used to form the scrambling code for the RACH and CPCH preambles. ETSI ETSI TR 102 058 V1.1.1 (2004-11) 39 |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.2.3.4 CPCH power control preamble part | The power control preamble segment is called the CPCH Power Control Preamble (PC-P) part. The Power Control Preamble length shall take the value 0 or 8 slots. |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.3.2.3.5 CPCH message part | Each message consists of up to N_Max_frames 10 ms frames. Each 10 ms frame is split into 15 slots, each of length Tslot = 2 560 chips, corresponding to one power-control period. Each slot consists of two parts, a data part that carries higher layer information and a control part that carries Layer 1 control information... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.4 Channel coding and service multiplexing | |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.4.1 Channel coding/interleaving for user services | W-CDMA offers three basic service classes with respect to forward-error-correction (FEC) coding [14]: • standard-services with convolutional coding; • high-quality services with Turbo coding; • services with service-specific coding, i.e. services for which the W-CDMA layer 1 does not apply any pre-specified channel cod... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.4.1.1 CRC attachment | Error detection is provided on transport blocks through a Cyclic Redundancy Check (CRC). The size of the CRC is 24, 16, 12, 8 or 0 bits. |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.4.1.2 Transport block concatenation and code block segmentation | All transport blocks in a TTI are serially concatenated. If the number of bits in a TTI is larger than Z, the maximum size of a code block in question, then code block segmentation is performed after the concatenation of the transport blocks. The maximum size of the code blocks depends on whether convolutional coding, ... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.4.1.3 Channel coding | The scheme of Turbo coder is a Parallel Concatenated Convolutional Code (PCCC) with two 8-state constituent encoders and one Turbo code internal interleaver. Table 5.4: Channel coding scheme and coding rate Type of TrCH Coding scheme Coding rate BCH PCH RACH 1/2 Convolutional coding (constraint length 9) 1/3, 1/2 Turbo... |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.4.1.4 Radio frame size equalization | Radio frame size equalization is padding the input bit sequence in order to ensure that the output can be segmented in data segments of same size. Radio frame size equalization is only performed in the UL. |
6cb5aad8e163723efe03239dba0e6403 | 102 058 | 5.4.1.5 Radio frame segmentation | When the transmission time interval is longer than 10 ms, the input bit sequence is segmented and mapped onto consecutive radio frames. Following rate matching in the DL and radio frame size equalization in the UL the input bit sequence length is guaranteed to be an integer multiple of radio frames. ETSI ETSI TR 102 05... |
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