ides when and how many UEs will be allowed to transmit. A request for transmission will contain data about the state of the transmission buffer and the queue at the UE and its available power margin. In addition to scheduled transmissions the standards also foresee a self-initiated transmission mode from the UEs in order to support shorter delays needed for VoIP types of services. Two basic scheduling methods are contemplated in the standard: Long term grants are issued to several terminals which can then send their data simultaneously. The grants are increased or decreased according to the current load of the cell and the requirements of the terminals. Short term grants would allow multiplexing terminals in the time domain instead of the code domain, as done for long term scheduling. In order to allow multiplexing uplink transmissions of several terminals in both the code and time domain the scrambling and channellisation codes will not be shared between different terminals. Because in the uplink the DPDCH and DPCCH are code-multiplexed and transmitted simultaneously in time, the ratio of their transmitted powers is important for the achievable payload bit rates. The greater part of the DPDCH and DPCCH are code-multiplexed and transmitted simultaneously. This would mean that the more power of the UE that is assigned to the DPDCH, to increase the bit rate achievable on that channel, the less power is left for DPCCH and the less reliable is the signalling in the link. In UMTS R99 the ratio between the power of the DPDCH and DPCCH was set to a constant. In HSUPA this ratio can be controlled by Node B. Further Evolution: Release 6 HSDPA, HSUPA and HSPA Table B.5 HSUPA UE categories HSUPA category Codes X spreading Transport block size Data rate (Mbps) 1 X SF4 2 X SF4 14484 2 X SF4 2 X SF4 14484 2 X SF2 20 000 2 X SF2 2 X SF2 20 000 2x SF2 + 2x SF4 20 000 2x SF2 + 2x SF4 11484 In HSUPA, unlike in HSDPA, soft and softer handovers will be allowed for packet transmissions. The control of the transmitted power of the UE 