Patent ID: 7039092
Filing Date: 2006-05-02
Classification: H04J,H04W

Abstract:
1. A method of allocating a channelisation code in a code division multiple access system comprising for each user, selecting a node of a path in a code tree in dependence on the currently required spreading factor; and reserving all nodes on the code tree in an upward and downward direction from the selected node; wherein the selected node for any user must not coincide with a node reserved by any other user, characterised in that the path in the code tree is defined based on a required range of spreading factors, and wherein for each user the defined path is communicated to that user in the downlink during radio access bearer (RAB) establishment, and wherein the selected node for a user must not coincide with a node reserved by another user only if the user and the other user are operational at the same time.