Secondary station and method of operating the station
First Claim
1. A secondary station for use in a radio communication system comprising a plurality of primary stations, the secondary station having means for engaging in a soft handover process, in which the secondary station communicates simultaneously with at least two primary stations, and receiver means including signal resolution means for resolving transmitted signals from the at least two primary stations received as a plurality of multipath signals, wherein means are provided for determining whether to allocate each multipath signal to the signal resolution means based on its time of arrival.
4 Assignments
0 Petitions
Accused Products
Abstract
A secondary station has a receiver capable of resolving signals received as a plurality of multipath signals from a plurality of base stations during a soft handover process. This capability may, for example, be provided by a Rake receiver. In order to decode and act upon the received signals in a very short period of time, signals (402g,402h) arriving after a predetermined time are not processed by the receiver which is able instead to process weaker signals (402d,402e) which arrived before the time (t1).
Such a secondary station is particularly suitable for decoding and acting upon power control commands included in received signals in a UMTS system, for which a very limited period of time is provided by the UMTS specification. In this application the predetermined time (t1) is the time after which signals are received too late for use in determining the next power control change
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Citations
10 Claims
- 1. A secondary station for use in a radio communication system comprising a plurality of primary stations, the secondary station having means for engaging in a soft handover process, in which the secondary station communicates simultaneously with at least two primary stations, and receiver means including signal resolution means for resolving transmitted signals from the at least two primary stations received as a plurality of multipath signals, wherein means are provided for determining whether to allocate each multipath signal to the signal resolution means based on its time of arrival.
- 6. A method of operating a secondary station comprising engaging in a soft handover process, in which the secondary station communicates simultaneously with at least two primary stations, receiving transmitted signals from the at least two primary stations as a plurality of multipath signals, and processing the received multipath signals by a signal resolver to resolve the transmitted signals, the method further comprising determining whether to process each multipath signal based on its time of arrival.
Specification