DPDCH

Abstract: Disclosed is a code division multiple access (CDMA) communication system having a downlink dedicated physical channel (DL_DPCH) having a downlink dedicated physical control channel (DL_DPCCH) and a downlink dedicated physical data channel (DL_DPDCH). The DL_DPCCH having a transport power control (TPC) field transmitting a TPC command for controlling uplink transport power, a transport format combination indicator (TFCI) field transmitting TFCI indicating a transport format combination of a currently transmitted channel, and a pilot field transmitting a pilot. The DL_DPDCH has first and second data fields transmitting downlink data. If data is normally received over an enhanced uplink dedicated channel (EUDCH), ACK information is generated, and if data is abnormally received over the EUDCH, NACK information is generated. Bits corresponding to the ACK or NACK information are punctured at a position randomly selected from the first and second data fields of the DL_DPDCH, and the ACK or NACK information is inserted into the punctured position before being transmitted.

Abstract: A method and apparatus for scheduling transmissions via an enhanced dedicated channel (E-DCH) are disclosed. A scheduled power is calculated for scheduled data flows. A remaining transmit power is calculated for the E-DCH transmission. A rate request message is generated, wherein the scheduled power, remaining transmit power and rate request message are used to select transport format combinations (TFCs) and multiplex data scheduled for the E-DCH transmission. The remaining transmit power is calculated by subtracting from a maximum allowed power the power of a dedicated physical data channel (DPDCH), a dedicated physical control channel (DPCCH), a high speed dedicated physical control channel (HS-DPCCH), an enhanced uplink dedicated physical control channel (E-DPCCH) and a power margin.

Abstract: Disclosed is a channel allocation method in a CDMA communication system. The method comprises receiving from a UTRAN one SF node CSF,k out of 2m-1 SF nodes (where m is an integer larger than 3) arranged in the form of a tree having a mother node and child nodes; searching a group including the received SF node CSF,k; spreading a signal on a dedicated physical data channel (DPDCH) with an OVSF code corresponding to a selected one of the received SF node and its child nodes in the searched group; and spreading a signal on a dedicated physical control channel (DPCCH) with an OVSF code corresponding to an SF node based on the received SF node.

Abstract: This invention deals with the problem of assigning the power offset between DPCCH and DPDCH. The problem arises from the usage of power control on the DPCCH whereas the quality that is under control (e.g. BER) is given on the DCH/ DPDCH. The power offset must be adjusted in such a way that the transmission power requirements of the DPCCH and the DPDCH are met without wasting to much of the power. An algorithm for assigning the power offsets is disclosed that consists of two main parts: Allocation of the specific G-values to every TFC by RRC in the RNC and signalling them to transmitting and receiving side (UE/ NodeB) via higher layer signalling. Autonomously adjusting of G in PHY regarding the current used TFC in the transmitter. The receiver determines the G-value from the TFC via TFCI signalling. This algorithm allows efficient setting of dynamically variable offset values without too much signalling overhead. It is compliant to the currently UMTS standard.