Downlink scheduling using parallel code trees

Details Downlink scheduling using parallel code trees Downlink scheduling using parallel code trees

2006-12-19

2006-12-19

Appiah, Charles N. (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S452100, C455S509000, C307S402000, C307S328000, C307S328000, C375S130000, C375S140000

Reexamination Certificate

active

07151936

ABSTRACT:
The present invention aims at avoiding code limitation in a CDMA cellular mobile communication network without decrease in data transmission quality. This object is achieved through a method of scheduling a transfer of data to at least one user in a cellular mobile communication network where the transfer of data is achieved via downlink channels using codes selected from a plurality of code trees. In a first step of the method a plurality of requests (*) to access downlink channels are received until the beginning of a scheduling time interval. In a second step permissions to access downlink channels ( ) are coordinated according to the assignment of downlink channels to the different code trees (A, B).

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