Abstract:
A method and apparatus for adaptively biasing a channel quality indicator (CQI) used for setting a configuration of communication between a transmitter and a receiver in a wireless communication system. The receiver sends a CQI and positive acknowledgement (ACK)/negative acknowledgement (NACK) messages to the transmitter. The ACK/NACK messages indicate the absence or presence of error, respectively, in a transmitted data packet. The CQI is derived from the signal-to-interference ratio (SIR) and the ACK/NACK messages. The transmitter calculates the block error rate (BLER) of the transmitted data packets based upon the ACK/NACK messages sent from the receiver. The transmitter compares the BLER of the transmitted data packets to a target BLER and biases the CQI based on the comparison in order to achieve the target BLER.
Abstract:
A method and apparatus (10) for efficiently allocating and deallocating interleaved data stored in a memory stack. The apparatus includes a processor (22) and a memory (12) including at least one memory stack. The processor receives and interleaves a plurality of data blocks. Each data block is allocated for a particular transport channel (TrCH) and has a designated transmission timing interval (TTI). The processor stores the interleaved data blocks in the memory stack based on the TTI of each data block, such that a data block having a larger TTI is allocated to the memory stack earlier and deallocated from the stack later than a data block having a smaller TTI. In one embodiment, the memory includes a first memory stack for common/shared uplink channels, a second memory stack for dedicated uplink channels, a third memory stack for common/shared downlink channels, and a fourth memory stack for dedicated downlink channels.
Abstract:
A method and apparatus for optimization of a modem for high data rate applications comprise a plurality of hardware accelerators which are configured to perform data processing functions, wherein the hardware accelerators are parameterized, a processor is configured to selectively activate accelerators according to the desired function to conserve power requirements and a shared memory configured for communication between the plurality of hardware accelerators.
Abstract:
A method and apparatus for adjusting a channel quality indicator (CQI) feedback period to increase uplink capacity in a wireless communication system are disclosed. The uplink capacity is increased by reducing the uplink interference caused by CQI transmissions. A wireless transmit/receive unit (WTRU) monitors a status of downlink transmissions to the WTRU and sets the CQI feedback period based on the status of the downlink transmissions to the WTRU. A base station monitors uplink and downlink transmission needs. The base station determines the CQI feedback period of at least one WTRU based on the uplink and downlink transmission needs and sends a command to the WTRU to change the CQI feedback period of the WTRU.
Abstract:
Wireless communication method and apparatus for selecting a channel type for a call are disclosed. In a wireless communication system that supports both a basic low speed channel and a special high speed channel, when a call is received from a user, it is determined whether the high speed channel is suitable for the call and preferable for the user. If so, it is determined whether the high speed channel is available. If so, the call is admitted and assigned to the high speed channel. If these criteria are not met, the call is admitted and assigned a low speed channel if an available low speed channel can support the call; otherwise the call request is rejected. After admitting the call, it is continuously determined whether the high speed channel or the low speed channel is best, and the channel type is switched accordingly.
Abstract:
The present invention is related to a method and system for preventing high speed downlink packet access (HSDPA) transmission loss due to transmission gap in compressed mode in a wireless transmit/receive unit (WTRU). In accordance with one embodiment, a Node-B receives a compressed mode transmission gap schedule of a WTRU, identifies HSDPA transmission time intervals (TTIs) that are affected by the WTRU compressed mode transmission gap schedule and schedules the HSDPA transmissions not to overlap the WTRU compressed mode transmission gap schedule. In accordance with another embodiment, the Node-B may inform the HSDPA transmission schedule to a radio network controller (RNC) and the RNC coordinates the HSDPA transmission schedule and a compressed mode transmission gap schedule of the WTRU.
Abstract:
PROBLEM TO BE SOLVED: To conduct a data processing method different from a conventional UTRAN processing method. SOLUTION: The address mapping of bits in a physical channel buffer 84 is determined from the address of bits in a first interleaver buffer 82. Addresses of the physical channel buffer 84 are determined corresponding to addresses of the bits after rate matching, bit scrambling, second interleaving and physical channel mapping in a rate matching engine 88. The bits are directly read from the first interleaver buffer 82 and written to the physical channel buffer 84 using the determined addresses of the physical channel buffer 84. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To conduct a data processing method different from a conventional UTRAN processing method. SOLUTION: The address mapping of bits in a physical channel buffer 84 is determined from the address of bits in a first interleaver buffer 82. Addresses of the physical channel buffer 84 are determined corresponding to addresses of the bits after rate matching, bit scrambling, second interleaving and physical channel mapping in a rate matching engine 88. The bits are directly read from the first interleaver buffer 82 and written to the physical channel buffer 84 using the determined addresses of the physical channel buffer 84. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To conduct a data processing method different from a conventional UTRAN processing method. SOLUTION: The address mapping of bits in a physical channel buffer 84 is determined from the address of bits in a first interleaver buffer 82. Addresses of the physical channel buffer 84 are determined corresponding to addresses of the bits after rate matching, bit scrambling, second interleaving and physical channel mapping in a rate matching engine 88. The bits are directly read from the first interleaver buffer 82 and written to the physical channel buffer 84 using the determined addresses of the physical channel buffer 84. COPYRIGHT: (C)2006,JPO&NCIPI