Abstract:
PROBLEM TO BE SOLVED: To inhibit jamming in an opposite direction by determining a data rate that can be supplied to each base station in an evaluation set and selecting the data rate. SOLUTION: Relative signal intensity that a mobile station(MS) receives from a nearby base terminal station(BTS) is detected. The loss of a communication path is evaluated by monitoring and evaluating the influence of jamming in an opposite direction in the BTS. A BTS which does not exist in the active group of BTSs communicating with a specified MS is combined with the active group and an evaluation set, namely, the super set of the BTS, which is called as an e-set, is generated. A data rate that can be supplied is determined for each BTS in the e-set communicating with an MS. It is determined by selecting the lowest data rate that BTS in the e-set can supply with respect to the transmission of data between the BTS in the e-set and the MS. The transmission of an opposite direction link is of especially high power, and high data rate transmission is stopped or the reduction of power is instructed.
Abstract:
PROBLEM TO BE SOLVED: To provide an efficient allocation of radio system resources for user application requirements in the management of system resource parameters in a radio communication system. SOLUTION: The apparatus for managing multi-user resources optimizes transmission resources while satisfying a required QoS reference of a user application providing a service, operates to determine allocation of radio transmission resources for each user application to which a radio system provides a service, determines total allocated transmission resources after transmission resources are allocated to all user applications, and compares the total allocated transmission resources with the upper limit transmission resource level of the radio system. In proportion to an initial allocation provided to each user application, a user application providing a service utilizes a part of difference between the upper limit transmission resource level and a currently allocated level.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of adjusting the power of a probe signal so as to increase the possibility that the probe signal can be detected by system equipment by properly compensating phasing affecting the probe signal. SOLUTION: A Doppler shift of a received pilot signal is extracted, an adjustment parameter is calculated according to the Doppler shift, and an adjustment parameter is calculated according to the Doppler shift, the time interval of the transmission of the continuous probe signal, and a system constant. The adjustment parameters are adapted to a probe signal to be sent to compensate the influence of phasing on the probe signal.
Abstract:
PROBLEM TO BE SOLVED: To obtain a new method for increasing the performance of a wireless communication system by validly managing the assignment of burst transmission. SOLUTION: A mechanism for the early end of burst transmission is provided based on the set of an intelligent reference. A power overload state and an excessive frame error rate(FER) are checked (101 and 102) at the time of deciding the early burst end (104). Also, whether or not the transfer of data is operated beyond an already known time without any burst is checked (103). Thus, system through-put and a data rate can be increased, and a power capacity in a data channel can be maximized. Especially, transmission quality can be maintained, and any power overload and excessive interrupting problem can be solved. A system resource can be validly saved, and further efficiently used as the result.
Abstract:
A method and apparatus are provided for dynamically controlling a high speed wireless communication system to optimize utilization of system resources and thereby increase system throughput. The invention operates to determine an allocation of wireless transmission resources to each user application serve d by the wireless system in a manner to optimize transmission resources while meeting required QoS criteria for they served user application. After all user applications have been provided a transmission resource allocation in this manner, the total transmission resources so allocated are determined and compared with a ceili ng transmission resource level for the wireless system. A portion of the difference between the ceiling and currently allocated transmission resource levels is then made available, according to the invention, to the served user applications in proportion to the initial allocation provided each user application.
Abstract:
A method and apparatus for adaptively adjusting the power of a probe signal to be transmitted by user equipment based on a characteristic of received signals and system constants so as to increase the likelihood that the probe signal will be detected by system equipment of a communication system. The Doppler shift of a received pilot signal is derived and an adjustment parameter is calculated based on the Doppler shift , time interval between successive probe transmissions and system constants. The adjustment parameter is applied to the probe signal to be transmitted to compensate for the effects of fading to be experienced by the probe signal to be transmitted.
Abstract:
The invention provides a novel methodology that increases the performance of wireless communication systems by efficiently managing the assignment of burst transmissions. The invention provides a mechanism for premature termination of burst transmissions, depending on a set of intelligent criteria. The invention checks for power overload conditions and excessive frame error rates (FER) in determining a premature burst termination. Also checked is a known time period which no burst shall exceed in transferring data. The invention advantageously increases the system throughput and data rates and maximizes power capacity in the data channels. In particular, transmission quality is maintained, as power overloading and excessive interference problems are circumvented. Systems resources are efficiently conserved and better utilized as a result.
Abstract:
The invention provides a power control methodology that increases the performance and the throughput of wireless communication systems. In particular, the invention provides a reverse jamming prevention process that efficiently utilizes power resources in a communication system such as CDMA. The invention advantageously prevents reverse jamming due to link imbalance that results from differences in forward and reverse link coverage. According to the invention, an evaluation set (e-set), which is a super set of the active set of base transceiver stations serving specific users, is determined to prevent the negative effects of reverse jamming. Excessive interference problems in the reverse link, particularly in high-speed wireless systems, are thus avoided.
Abstract:
The invention provides a novel methodology that increases the performance of wireless communication systems by efficiently managing the assignment of burst transmissions. The invention provides a mechanism for premature termination of burst transmissions, depending on a set of intelligent criteria. The invention checks for power overload conditions and excessive frame error rates (FER) in determining a premature burst termination. Also checked is a known time period which no burst shall exceed in transferring data. The invention advantageously increases the system throughput and data rates and maximizes power capacity in the data channels. In particular, transmission quality is maintained, as power overloading and excessive interference problems are circumvented. Systems resources are efficiently conserved and better utilized as a result.
Abstract:
In an H-ARQ system, when the AN is receiving packet data traffic on the RL from an AT and is generating ACKs and NAKs according to the ability of the AN to properly decode such data, the AN gates-off a DRCLock bit within in a sub-packet duration in which an ACK is transmitted on the FL MAC channel. When it receives an ACK, the AT ignores the non-transmitted DRCLock bit in a current sub-packet duration, and assumes that the DRC channel is "good". When the AN sends a NAK to the AT, it also sends the DRCLock bit. When the AT receives a NAK in a sub-packet duration, it reads and processes whatever DRCLock bit is received during that sub-packet duration. When no data traffic is transmitted on the RL traffic channel, corresponding DRCLock bits are not gated-off by the AN and are transmitted to the AT. The AT then processes the received DRCLock bits. In an alternative embodiment, transmission of DRCLock is totally eliminated.