SCHEDULING VOICE-OVER-IP USERS IN WIRELESS SYSTEMS USING CARRIER AGGREGATION
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Feb 3, 2015
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Feb 3, 2015
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Scheduling of delay-sensitive downlink traffic in a downlink carrier aggregation scenario is performed in such a way as to take advantage of the unambiguous HARQ feedback that is available when the downlink assignment is transmitted coincident with an uplink TDD subframe on the secondary carrier. An example method, in a wireless network node supporting downlink carrier aggregation of a primary carrier in Frequency Division Duplexing, FDD, mode and a secondary carrier in Time-Division Duplexing, TDD, mode, includes determining (710) that a first user device supported or to be supported with said downlink carrier aggregation has Bela sensitive downlink traffic. Subsequent scheduling of the first user device's delay-sensitive downlink traffic is prioritized (720) in transmission-time intervals, TTIs, in which the subframe of the secondary carrier is an uplink subframe. The delay-sensitive downlink traffic may be voice-over-Internet-Protocol, VoIP, traffic, for example.
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