摘要:
A method and apparatus for transmitting a control channel in a base station for a wireless communication system. The base station transmits information including a number of channel elements constituting control channels, to a terminal; establishes a set of control channels that the terminal can receive, within the number of channel elements using an identifier (ID) of the terminal; and transmits control information to the terminal through a selected control channel among the control channels. The terminal is restricted to monitor only a proper number of control channels established without the need to monitor all control channels, thereby reducing reception complexity and avoiding unnecessary battery consumption.
摘要:
A method is provided for transmitting a downlink shared control channel including a control signal necessary for restoring a transmission data signal in a mobile communication system that transmits a data signal using multiple antennas. It is determined whether the transmission data signal is coded with two or more codewords before being transmitted. One of a first element index of a sub-codebook configured only with a one codeword-dedicated precoding in a precoding codebook and a second element index of a sub-codebook configured only with a more-than-two codeword- dedicated precoding is selected, according to the determination result. A control channel is generated by including the selected element index in the precoding information. The generated control channel is mapped to a particular resource block and the mapped control channel is transmitted to a particular reception apparatus.
摘要:
A method and apparatus for allocating and signaling ACK/NACK resources in a wireless communication system are provided, in which a Node B determines to use ACK/NACK resources within a predetermined fixed-size first resource group for ACK/NACK transmission for non-persistently scheduled data channels, the ACK/NACK resources being implicitly mapped to SCCHs carrying scheduling information about the non-persistently scheduled data channels, and allocates ACK/NACK resources within a predetermined flexible-size second resource group for ACK/NACK transmission for persistently scheduled data channels and transmits resource indication information explicitly indicating the allocated ACK/NACK resources to at least one UE.
摘要:
Improvement of reception downlink common control channels in an Orthogonal Frequency Division Multiplexing (OFDM)-based cellular wireless communication system is provided by User Equipment (UE) using a downlink synchronization channel transmitted in an adjacent OFDM symbol as a pilot channel for channel estimation upon common control channel demodulation. When providing both unicast and multicast data services, OFDM symbol transmitting multicast data generally has a longer Cyclic Prefix (CP) than an OFDM symbol for unicast data than a signal frequency network. Therefore, length of CPs of OFDM symbols belonging to each subframe may change depending on whether multimedia data is transmitted. Although a UE does not recognize the length of a CP applied to a subframe in which a common control and a synchronization channel are transmitted, the UE can use a downlink synchronization channel as a channel estimation pilot to demodulate the common control channel.
摘要:
A method and an apparatus for transmitting uplink information items having various characteristics by using a single Fast Fourier Transform (FFT) block. The method includes determining whether uplink signaling information exists to be transmitted when uplink data exists to be transmitted; multiplexing the uplink data and control information for the uplink data and transmitting multiplexed data through a first frequency resource allocated for the uplink data, when no uplink signaling information exists; multiplexing the uplink data, control information for the uplink data, and the uplink signaling information, and transmitting multiplexed data through a first frequency resource allocated for the uplink data, when the uplink signaling information exists; and transmitting the uplink signaling information through a second frequency resource allocated for the uplink signaling information, when no uplink data is to be transmitted and the uplink signaling information exists to be transmitted.
摘要:
A system and method are provided for setting gain factors for dedicated physical channels in a mobile communication system supporting E-DCH service. If the E-DCH is established without the legacy DCH, the UE sets a gain factor for a DPCCH related to the DCH to a predetermined constant and calculates gain factors for dedicated physical channels related to the E-DCH using the gain factor of the DPCCH. In another embodiment of the present invention, if the E-DCH is established without the legacy DCH, the RNC sets a gain factor for a DPCCH related to a virtual DCH to a predetermined constant and sends channel configuration information including the gain factor to the UE.
摘要:
A scheduling method and apparatus are provided for soft handover in a user equipment (UE) in in a mobile communication system supporting an enhanced uplink packet data service. A receiver receives dedicated scheduling assignment information for dedicated scheduling assignment from a serving Node B, and receives at least one scheduling grant indicator for common scheduling assignment from at least one non-serving Node B. A first scheduling decider determines a combined scheduling grant indicator by combining at least one scheduling grant indicator received from the at least one non-serving Node B. A second scheduling decider determines whether to use the combined scheduling grant indicator according to a predetermined reference, and a maximum rate of an uplink according to the dedicated scheduling assignment information or the combined scheduling grant indicator. A transport format decider determines a transport format of an uplink within the maximum rate.
摘要:
A method and an apparatus for data transmission in a mobile telecommunication system supporting an enhanced uplink service are provided. A Transport Format Combination (TFC) selector determines TF information for data to be transmitted through a first data channel not supporting Hybrid Automatic Repeat reQuest (HARQ) and a second data channel supporting HARQ, and determines gain factors for the first and second data channel, and first and second control channel carrying control information for the first and second data channel. The gain factors are input to a physical channel transmission controller, and the physical channel transmission controller reduces the gain factor for the second channel if total transmit power required for transmission of the channels exceeds the predetermined maximum allowed power. A gain scaler adjusts transmit powers of the channels using the scaled gain factor and gain factors for the first data channel, the first control channel and the second control channel.
摘要:
A method and apparatus for changing a Transmit Time Interval (TTI) based on a Hybrid Automatic Repeat Request (HARQ) process in a code division multiple access (CDMA) communication system that supports a packet data service through an Enhanced Uplink Dedicated transport Channel (E-DCH). According to the method and apparatus, a data transmission/reception is performed in a manner that a TTI change signal is received, the actual time point of TTI change is calculated based on the TTI change signal and the HARQ process of the previous TTI, and the TTI is changed at the calculated time point of TTI change.
摘要:
A method for configuring gain factors in a WCDMA telecommunication system is provided in which the gain factor for defining power required for normal reception of uplink data in an environment supporting an uplink service over an E-DCH can be configured using minimal signaling information. First gain factors for first TFs corresponding to a part of a TF set including a plurality of TFs available for an uplink service are received. One of the first TFs is determined as a reference TF for a second TF other than the first TFs in the TF set. Then, a second gain factor for the second TF is calculated using the first gain factor for the determined reference TF. The second gain factor is used for transmitting or receiving uplink data.