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Optimal frequency of Walsh mask broadcast for forward high-speed wireless packet data channels

The 1/spl times/EV-DV 3G wireless network system is able to simultaneously support traditional code division multiplexed voice and circuit-switched data channels in addition to one or two time shared high speed packet data channels. In practice, voice calls will be provided with higher priority than data calls. Therefore, radio resources (e.g., power and Walsh codes) will be first given to voice connections and any unused resources will be dynamically assigned to the high speed packet data channel. Because of Walsh code fragmentation, it may be possible that Walsh codes not being used for voice and circuit-switched data connections cannot be used by the packet data channel. In order to make use of such codes, the Walsh code mask must be broadcast in the sector. Such a broadcast results in increased sector throughput due to the additional Walsh codes available to the forward packet data channel (F-PDCH) but it also requires forward link resources which reduces throughput. We determine the broadcast frequency that optimizes this tradeoff.