ENABLING TECHNOLOGIES FOR 4G NETWORKS BY ADEL AL-SHAHRANI June 3, 2003

OUTLINE WHY 4G NETWORK LAYER TECHNOLOGIES Network Architectures Network Architectures MIPv6 & HMIPv6 MIPv6 & HMIPv6 IDMP IDMP PHYSICAL LAYER TECHNOLOGIES SDR SDR OFDM OFDM M-Ary MC-CDMA M-Ary MC-CDMACONCLUSION

WHY 4G? 1G Analogy Communication 2G Digital Communication 3G Multimedia 4G More Services

NETWORK ARCHTECTURES OVERLAY NETWORK COMMON ACCESS NETWORK MULTIMODE DEVICES

OVERLAY NETWORK UAP Handoff: network

COMMON ACCESS NETWORK Wireless network Flexible

MULTIMODE DEVICES AMPS/CDMA Physical Device

MIPv6 MN, HA and FA CoA: FA or DHCPv6 Optimizing the rout

Why MIPv6? (Cont.) CriteriaMIPv4MIPv6 Foreign Agent Rely on HA and MNAlso, as MIPv4 but it doesn’t require FA to issue CoA (DHCP do it)-> location independent Route optimization Optional for CN and it need to be implemented Allow direction connection from CN and MN but it need binding update to HA Security Use Virtual Private Network outside firewall and allow v4 IPsec VPN As MIPv4 and it allow v6 IPsec VPN Home Agent address discovery -- Using IPv6 anycast by sending binding update to HA anycast address.

MIPv6 (Cont.)

HMIPv6 Reduce handoffs Mobility Anchor Point (MAP) Two CoAs

HMIPv6 (Cont.)

Intra-Domain Mobility Management Protocol Reducing handoffs and paging latency Reducing handoffs and paging latency Gateway foreign agent (GFA) GCoA & LCoA Delays: Link layer establishment delay, IP subnet registration and Intradomain update delay MovementImminent message

Intra-Domain Mobility Management Protocol (Cont.)

SOFTWARE DEFINE RADIO (SDR) Allocating different frequency BW in different countries 4G deals with different technologies standards Infrastructure hardware -downloading software Infrastructure hardware -downloading software Development in : (A/D) and (D/A) converters (A/D) and (D/A) converters (FPGA) and digital signal processing (DSP) (FPGA) and digital signal processing (DSP) general-purpose programmable devices general-purpose programmable devices

SDR (Cont.) Packet-based switch Multiple boards in a cPCI Flexible and scalable

Orthogonal Frequency Division Multiplexing Multi-Carrier Modulation (MCM) Supporting date rate: 54Mbps date rate: 54Mbps real traffic: 22Mbps real traffic: 22MbpsOrthogonally Parallel subcarriers

OFDM (Cont.) Components: FFT processors, FFT processors, System I/O System I/O Serial-parallel converters Serial-parallel converters Parallel-serial converters Parallel-serial converters OFDM logic OFDM logic

OFDM (Cont.) (a)Transmitter (b)Receiver

OFDM (Cont.) Types: Vector OFDM Vector OFDM F-OFDM F-OFDM W-OFDM W-OFDM MIMO-OFDM MIMO-OFDM Issues: Frequency offset, Phase noise and Peak to average power ratio-PAR

M-ary MC-CDMA Supporting data rate: 20Mbps Combination of OFDM and CDMA Advantages: High data rates High data rates High BW efficiency High BW efficiency Reducing interference and frequency diversity Reducing interference and frequency diversity

M-ary MC-CDMA (Transmitter)

M-ary MC-CDMA (Receiver)

CONCLUSION Using IP: MIP SDR is the drive technology to 4G High speed technologies (MCM): OFDM and MC-CDMA HW developments

THANK YOU

Background: IDMP Paging Reduce Latency Paging Areas (PAs) Area Identifiers (PAIs) PageSolicitation packet

IDMP Paging (Cont.)

MIMO-OFDM Technologies: MIMO MIMO OFDM OFDMAdvantages: reducing the fade margin reducing the fade margin double the data rate double the data rate frequency diversity frequency diversity allows different data rates allows different data rates Performance: Fading Margins, Cell Size and Measured Data Rates