The case for Mobile Wi-Max
The Mobile WiMAX systems profiles was approved in February 2006.Mobile WiMAX is based on the 802.16e-2005, this enables WiMAX systems to address portable and mobile applications in addition to fixed and nomadic applications. Mobile WiMAX introduces OFDMA and supports several key features necessary for delivering mobile broadband services at vehicular speeds greater than 120 km/hr1 with QoS comparable to broadband wireline access alternatives. These features and attributes include:
Tolerance to Multipath and Self-Interference with subchannel orthogonality in both the Downlink (DL) and the Uplink (UL).
Scalable Channel Bandwidths from 1.25 to 20 MHz
Time Division Duplex2 (TDD) is defined for the initial mobile WiMAX profiles for its added efficiency in support of asymmetric traffic and channel reciprocity for easy support of advanced antenna systems.
Hybrid-Automatic Repeat Request (H-ARQ) provides added robustness with rapidly changing path conditions in high mobility situations.
Frequency Selective Scheduling and subchannelization with multiple permutation options, gives mobile WiMAX the ability to optimize connection quality based on relative signal strengths to specific users.
Power Conservation Management ensures power-efficient operation of battery operated mobile handheld and portable devices in Sleep and Idle modes.
Network-Optimized Hard Handoff (HHO) is supported to minimize overhead and achieve a handoff delay of less than 50 milliseconds.
Multicast and Broadcast Service (MBS) combines the features of DVB-H, MediaFLO and 3GPP E-UTRA for:
a) High data rate and coverage using a Single Frequency Network
b) Flexible radio resource allocation
c) Low mobile device power consumption
d) Low channel switching time
Smart Antenna support aided by subchannelization and channel reciprocity enables a wide range of advanced antenna systems including beamforming, space-time coding and spatial multiplexing.
Fractional Frequency Reuse controls co-channel interference to support universal frequency reuse with minimal degradation in spectral efficiency.
5 millisecond Frame Size provides optimal tradeoff between overhead and latency.
The first commercial portable/mobile application for WiMAX certified products is expected to take place in Korea with the launch of WiBro services . Products for WiBro services operate in the licensed 2.3 GHz frequency band with an 8.75 MHz channel bandwidth. This initial product launch will use SISO antenna configurations and support mobile speeds >60 km/hr. Additional deployments of Mobile WiMAX products are expected in the early 2007 time frame.
Tolerance to Multipath and Self-Interference with subchannel orthogonality in both the Downlink (DL) and the Uplink (UL).
Scalable Channel Bandwidths from 1.25 to 20 MHz
Time Division Duplex2 (TDD) is defined for the initial mobile WiMAX profiles for its added efficiency in support of asymmetric traffic and channel reciprocity for easy support of advanced antenna systems.
Hybrid-Automatic Repeat Request (H-ARQ) provides added robustness with rapidly changing path conditions in high mobility situations.
Frequency Selective Scheduling and subchannelization with multiple permutation options, gives mobile WiMAX the ability to optimize connection quality based on relative signal strengths to specific users.
Power Conservation Management ensures power-efficient operation of battery operated mobile handheld and portable devices in Sleep and Idle modes.
Network-Optimized Hard Handoff (HHO) is supported to minimize overhead and achieve a handoff delay of less than 50 milliseconds.
Multicast and Broadcast Service (MBS) combines the features of DVB-H, MediaFLO and 3GPP E-UTRA for:
a) High data rate and coverage using a Single Frequency Network
b) Flexible radio resource allocation
c) Low mobile device power consumption
d) Low channel switching time
Smart Antenna support aided by subchannelization and channel reciprocity enables a wide range of advanced antenna systems including beamforming, space-time coding and spatial multiplexing.
Fractional Frequency Reuse controls co-channel interference to support universal frequency reuse with minimal degradation in spectral efficiency.
5 millisecond Frame Size provides optimal tradeoff between overhead and latency.
The first commercial portable/mobile application for WiMAX certified products is expected to take place in Korea with the launch of WiBro services . Products for WiBro services operate in the licensed 2.3 GHz frequency band with an 8.75 MHz channel bandwidth. This initial product launch will use SISO antenna configurations and support mobile speeds >60 km/hr. Additional deployments of Mobile WiMAX products are expected in the early 2007 time frame.
posted by iddy @ 10:22 PM
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