HSDPA system with reduced inter-user interference

Details HSDPA system with reduced inter-user interference HSDPA system with reduced inter-user interference

2011-02-15

2011-02-15

Eng, George (Department: 2617)

Multiplex communications

Channel assignment techniques

Messages addressed to multiple destinations

C370S338000, C370S329000, C370S335000

Reexamination Certificate

active

07889755

ABSTRACT:
In a wireless network (100) with HSDPA-enabled user equipment devices (130), the base transceiver station (120) transmits to each HSDPA-enabled UE information regarding allocation of HSDPA codes and associated modulation techniques for other HSDPA-enabled UEs. Using this additional control information, each UE configures decision feedback filter of its equalizer to reduce inter-user interference. The additional control information may be transmitted in a packet (300) that includes a CRC portion (310) with the packet's CRC masked by a common ID, which is known to the HSDPA-enabled UEs. To reduce the number of bits needed to transmit the additional control information, the HSDPA codes used with a particular modulation technique are allocated consecutively. For each modulation technique, only the beginning code and the total number of codes need be known to the UEs. The number of codes used with each modulation technique may be allowed to change once in several TTIs.

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