1. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 1 of 17 WCDMA Air Interface Training Part 6 WCDMA TDD Mode

2. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 2 of 17 WCDMA TDD Mode Time-Domain Duplex (TDD) Mode äBenefits Used where paired frequency bands are not available Total system deployment in 5 MHz of spectrum Asymmetrical RF Channel äDisadvantages Discontinuous Transmission (EMI) Frame synchronization is required to prevent UL/DL collisions Requires precise timing control of UE transmission

3. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 3 of 17 WCDMA TDD Mode Comparison of FDD and TDD Modes (1.28 Mcps TDD under development)

4. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 4 of 17 WCDMA TDD Mode WCDMA Code Layering (TDD vs. FDD)

5. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 5 of 17 BCCH Broadcast Control Ch. PCCH Paging Control Ch. CCCH Common Control Ch. DCCH Dedicated Control Ch. DTCH Dedicated Traffic Ch. N BCH Broadcast Ch. PCH Paging Ch. FACH Forward Access Ch. DCH Dedicated Ch. P-CCPCH(*) Primary Common Control Physical Ch. S-CCPCH Secondary Common Control Physical Ch. DPDCH (up to 14 per carrier) Dedicated Physical Data Ch. TFCI bits SSC i Logical Channels (Layers 3+) Transport Channels (Layer 2) Physical Channels (Layer 1) Downlink RF Out DSCH Downlink Shared Ch. SHCCH DSCH Control Ch. CTCH Common Traffic Ch. Data Encoding PDSCH Physical Downlink Shared Channel PICH (Paging Indication Channel ) Paging Indication bits S/P Cell-specific Scrambling Code I+jQ I/Q Modulator Q I C ch C ch 256,1  GSGS PSC GPGP  Sync Codes(*) * Note regarding P-CCPCH and SCH Sync Codes are transmitted only in bits 0-255 of each timeslot; P-CCPCH transmits only during the remaining bits of each timeslot  Filter Gain SCH (Sync Channel) DTCH Dedicated Traffic Ch. 1 DCH Dedicated Ch. Data Encoding MUXMUX CCTrCH DCH Dedicated Ch. Data Encoding WCDMA Downlink (TDD)

6. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 6 of 17 Logical Channels (Layers 3+) Transport Channels (Layer 2) Uplink RF Out UE Scrambling Code I+jQ I/Q Mod. Q I Filter CCCH Common Control Ch. RACH Random Access Ch. PRACH Physical Random Access Ch. DPDCH #1 Dedicated Physical Data Ch. Data Coding DPDCH #2 (optional) Dedicated Physical Data Ch. DPDCH #3 (optional) Dedicated Physical Data Ch. DPDCH #16 (optional) Dedicated Physical Data Ch. TPC, TFCI bits RACH Control Part  DCCH Dedicated Control Ch. DTCH Dedicated Traffic Ch. N DCH Dedicated Ch. Data Encoding DTCH Dedicated Traffic Ch. 1 DCH Dedicated Ch. Data Encoding MUXMUX CCTrCH DCH Dedicated Ch. Data Encoding USCH Downlink Shared Ch. SHCCH USCH Control Ch. Data Encoding PUSCH Physical Uplink Shared Channel S/P C ch Gain S/P C ch Gain S/P C ch Gain S/P C ch Gain S/P C ch Gain S/P C ch Gain WCDMA Uplink (TDD)

7. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 7 of 17 WCDMA TDD Frame Formats At least one slot per frame must be allocated for UL, DL  15 Slots per Frame, 0.666 mSec per slot, 10 mSec total    Multiple switching points; Symmetric DL/UL Multiple switching points; Asymmetric DL/UL Single switching point; Symmetric DL/UL Single switching point; Asymmetric DL/UL Examples of valid TDD frame formats 3GPP TS 25.221

8. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 8 of 17 WCDMA TDD Burst Structures 2560 Chips (0.666 msec) PSC TDD Synchronization Burst Uses similar SCH codes as FDD mode Provides slot synchronization and Cell Scrambling Code Group ID Transmitted DL only, one or two slots per frame (any slot) 3GPP TS 25.221 123456789101112131415 1 Frame = 15 slots = 10 mSec SSC 1 SSC 2 SSC 3 t offset Sync Burst T offset reduces the probability that a UE will receive conflicting SCH bursts from multiple cells T offset is one of 32 possible values, changes from frame to frame, based on the Cell Code Group

9. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 9 of 17 WCDMA TDD Burst Structures Midamble 512 chips Data 976 Chips GP 96 2560 Chips (0.666 msec) Traffic Burst Type I Data 976 Chips Midamble 256 chips Data 1104 Chips GP 96 Data 1104 Chips Traffic Burst Type II Longer Midamble for UL, where every slot may require new synchronization Shorter Midamble for DL, where synchronization is consistent on every slot. Also used in UL when less than 4 users per timeslot TPCTPC TFCITFCI TFCITFCI TPCTPC TFCITFCI TFCITFCI Notes: TFCI and TPC are included in the length of data fields. TFCI and TPC are subject to same Channelization and Scrambling Codes as the data fields. TPC is UL only and must be transmitted at least once per frame TFCI is optional 3GPP TS 25.221 Midamble 512 chips Data 880 Chips GP 192 Random Access Burst Data 976 Chips

10. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 10 of 17 WCDMA TDD Multicode Transmission Data 976 Chips GP 96 2560 Chips (0.666 msec) Data 976 Chips TPCTPC TFCITFCI TFCITFCI 3GPP TS 25.221 123456789101112131415 1 Frame = 15 slots = 10 mSec Data 976 Chips GP 96 Data 976 Chips TPCTPC TFCITFCI TFCITFCI GP 96 Data 976 Chips TPCTPC TFCITFCI TFCITFCI Channelization Code 1 Channelization Code 2 Channelization Code N ( Midambles are not coded )

11. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 11 of 17 WCDMA TDD Slot Formats 3GPP TS 25.221 TDD Downlink Slot Formats Note: Data Rates are post- error correction, and include TFCI bits Data rates shown are for SF=1

12. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 12 of 17 WCDMA TDD Slot Formats 3GPP TS 25.221 TDD Uplink Slot Formats (Partial listing) Data Rates are post-error correction, SF=1, and include TFCI and TPC bits

13. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 13 of 17 TDD Data Coding, Multiplexing Turbo Coding R=1/3 240 #2 1950#1 1950 1204 1150 *54 Radio frame FN=4N+1Radio frame FN=4N+2Radio frame FN=4N+3Radio frame FN=4N Traffic data (1280x2) 2nd interleaving 1204 1150541150541150 *54 3888 1280 Termination bits CRC16 240 100 96 CRC 12 + TAIL 8 Rate matching Layer 3 Control data Conv. Coding R=1/2 Radio Frame Segmentation 5 code channels SF = 16 TFCI only in ch. 1 Rate matching 1st interleaving 1280 Traffic @ 64 kbps L3 Data @ 2.4 kbps 3GPP TS 25.102 App. A Add CRC bits 12 * Data from second 3840-bit packet #2 1150#1 1150 3900 1st interleaving 4 Radio Frame Segmentation #1 60#2 60#3 60#4 60 #1 54#2 54#3 54#4 54 122MA122 MA122 MA122 MA122 114MA114 TF CI 8 8 122MA122 MA122 MA122 MA122 114MA114 TF CI 8 8 122MA122 MA122 MA122 MA122 114MA114 TF CI 8 8 122MA122 MA122 MA122 MA122 114MA114 TF CI 8 8

14. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 14 of 17 WCDMA TDD Power Control Power Control not as critical as FDD mode UE transmit power updated through open-loop SIR calculation UE can determine uplink path loss based on downlink measurement BS transmit power updated once or twice per frame via TPC commands sent from UE 3GPP TS 25.221

15. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 15 of 17 WCDMA TDD Timing Advance UTRAN adjusts UE timing via signaling message Timing advance of [0, 1,... 63] x 4 chips 66.66 uSec range (~ 10 km range adjustment) 3GPP TS 25.221

16. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 16 of 17 TDD Dynamic Channel Assignment DCA Improves allocation of resources Highly loaded cell can “borrow” channels a lightly loaded cell (Slow DCA) Channels may be allocated between cells to support a handover (Slow DCA) Timeslots and Codes can be reallocated dynamically within a cell (Fast DCA) 3GPP TS 25.221 Cell 1 Cell 2 UTRAN In this example, the UTRAN may allocate more frequencies to Cell 1; fewer to Cell 2

17. 6/038 13 - EN/LZU 108 5306 Rev A WCDMA Air Interface Part 6: 17 of 17 WCDMA TDD Mode Summary TDD Mode shares many characteristics with FDD Chip rate Slot and Frame Structures Synchronization Codes Error protection coding and Interleaving Filtering and Modulation TDD Benefits Can be deployed in 5 MHz total spectrum Allows asymmetric UL/DL data Spreading Factors from 1 to 16 Allow multiple users to share one time slot Peak data rates comparable to FDD mode Cell site time synchronization is required 3GPP TS 25.221