Approaches for Phasing of cdma2000 ® Evolution Dr. Byung K Yi Chair, TSG-C LG Electronics cdma2000 ® is the trademark for the technical nomenclature for certain specifications and standards of the Organizational Partners (OPs) of 3GPP2. Geographically (and as of the date of publication), cdma2000 ® is a registered trademark of the Telecommunications Industry Association (TIA-USA) in the United States.

1 Outline Executive Summary cdma2000 ® Evolution Objectives Phased Approaches Phase I : Evolutionary Approach Phase II : Revolutionary Approach Summarizing Remarks

2 Executive Summary Significant support has been expressed for cdma2000 evolution Air Interface Evolution (AIE) Technical Experts Meeting (TEM) for 3GPP2 Evolution was held during March 2005 in Denver, CO, USA. AIE TEM workshop was intended to share the views of the future 3GPP2 Evolution. 10 Requirement and 11 Technical contributions were presented. Phased approaches for 3GPP2 evolution were proposed and discussed. This presentation summarizes overall proposed cdma2000 Evolution Objectives and phasing Approaches.

3 Proposed cdma2000 Evolution Objectives (1/2) Enhanced end user broadband wireless experience Support evolving MMD/IMS services Provide air interface aspects for advanced end to end QoS delivery Increase voice capacity over cdma2000 1x Support bandwidth allocations up to 20 MHz or more in 1.25 MHz blocks Increase peak data rates and system throughput capacity –Increase spectral efficiency –Improve cell coverage and increase range –Long-term targets for peak data rate FL : 100 Mbps ~ 1 Gbps RL : 50 Mbps ~ 100 Mbps Decrease system latency

4 Support flexible spectrum allocation with possible non- contiguous carriers Dynamic channel allocation Minimize control and signaling overhead Increase terminal battery life Lower cost per bit for CAPEX and OPEX Seamless handoff to other radio access networks Support backward compatibility for near term Proposed cdma2000 Evolution Objectives (2/2)

5 Phasing Approaches Rationale: –To enhance peak data rate and system throughput capacity while leveraging existing investments and maintaining the backward compatibility –To enhance broadband wireless experience while maintaining market leadership Evolution Phase I –Increase system performance while maintaining backward compatibility for fast time-to-market Evolution Phase II –Dramatically enhance system performance to maintain market leadership over competing technologies

6 Phase I Evolution (1/3) Goals to achieve : –Maximize Return on Investment (ROI) by: Maintaining backward compatibility Reusing existing infrastructure equipment –Fast time-to-market to maintain market leadership Multi-carrier cdma2000 –Number of 1.25 MHz carriers, N, 1 <= N <= 15 –Both symmetric and asymmetric FL/RL assignments Minimum N = 1 for backward compatibility

7 –Specification will support contiguous & noncontiguous carrier assignments –FL Peak Data Rate: up to 15 x 3.1 Mbps (up to 46.5 Mbps) –RL Peak Data Rate : up to 15 x 1.8 Mbps (up to 27 Mbps) Phase I Evolution (2/3)

8 Technologies Under Study –Flexible duplex –Multiple Antenna Technologies SDMA Tx/Rx Diversity, Antenna Arrays –Higher-order modulation (64 QAM) –Advanced reception with equalization and interference cancellation –Enhanced broadcast and multicast services (BCMCS) Cellular Digital Multimedia Broadcast (CDMB) Phase I Evolution (3/3)

9 Evolution Phase II (1/4) Goals to achieve : –Increased spectral efficiency –Higher peak data rates –Reduced latency Enhancements of existing Multi-carrier cdma2000 : –Backward compatibility –Rapid time-to-market –Technologies under consideration : Interference Cancellation Enhanced FL Equalizer Advanced FEC Antenna Techniques

10 New Air Interface (AI) –Bandwidth up to 20 MHz or more –Peak data rates FL : 100 Mbps ~ 1 Gbps RL : 50 Mbps ~ 100 Mbps –Criteria for new AI Ease of scalable bandwidth operation Excellent performance in frequency-selective channels in broadband Easy accommodation of value-added technologies like MIMO Evolution Phase II (2/4)

11 –Possible Multiplexing Technologies : OFDM MC-CDMA DS-CDMA with higher chip rate Spread OFDM (S-OFDM) Single carrier with cyclic prefix and frequency domain equalizer –Spatial Processing : MIMO Spatial multiplexing Space Time codes (STC) Beamforming Evolution Phase II (3/4)

12 Coexistence of new modulation over existing multi-carrier cdma2000 : –Providing improved spectrum utilization and peak data rates while maintaining backward compatibility –New modulation : OFDM –OFDM symbols in cdma2000 slots –Value-added Technologies : MIMO SDMA Evolution Phase II (4/4)

13 Summarizing Remarks (1/2) Common Objectives for 3GPP2 Evolution –Increase data rate to maintain a market leadership over other wideband systems –Latency reduction –Backward compatibility for near-term Two step phased approaches for evolution were proposed to leverage investments while exploiting the promising technologies Phase I –Cost effective and straightforward migration to provide higher transmission rates and spectral efficiency –Nx CDMA systems (cdma2000 Rev. D and HRPD)

14 –Peak data rates : FL Peak Data Rate: at least 15 x 3.1 Mbps (up to 46.5 Mbps) RL Peak Data Rate : at least 15 x 1.8 Mbps up to 27 Mbps Phase II –Enhancements beyond Phase I providing increased system performance –Peak data rates greater than 100 Mbps –Candidate Technologies : CDMA with Equalizer or Interference Cancellation OFDM(A) IFDMA (Interleaved FDMA) MIMO, SDMA Advanced Modulation and Coding Summarizing Remarks (2/2)