摘要:
At noise component addition section 105, a noise equivalent value equivalent in size to noise component is calculated using a constant which is dependent on a difference of spreading factors between a common pilot channel and packet channels, and at correlation matrix and correlation vector calculation section 106, the noise equivalent value is added to diagonal elements of an autocorrelation matrix. At weight calculation section 107, an optimal weight is calculated using the autocorrelation matrix whose diagonal elements have been added the noise equivalent value, and at adaptive equalization section 108, equalization of reception signal is carried out. Thereby, noise enhancement produced in the packet channels after the equalization due to the difference between the spreading factor of the common pilot channel and the spreading factor of the packet channels can be reduced.
摘要:
A transmission rate determining method that enables assignment of transmission rate (modulation scheme and coding rate) to be optimized with high accuracy in the AMC technique. In the method, in abase station, Doppler frequency detector 117 detects the Doppler frequency (moving speed) of each mobile station. MCS assignment section 125 corrects a relational expression of MCS (coding rate and modulation scheme) and CIR based on the Doppler frequency (moving speed) obtained in Doppler frequency detector 117, for example, corrects a threshold in CIR, and determines MCS optimal for CIR report value. Results of assignment in MCS assignment section 125 are output to coding section 101 and modulation section 103.
摘要:
A communication terminal device of the present invention can prevent assignment of unnecessary wireless resources and can efficiently assign the wireless resources in a situation in which there is data that cannot be transmitted immediately. In the device, a MAC control element generation unit (115) generates a BSR MAC control element for reporting to a base station a transmittable data volume. The memory usage management unit (106), if a notification is received that resources have been exhausted from the memory usage management unit (111), or if the stored data volume of a pre-encryption data buffer (102) or a post-encryption data buffer (104) exceeds a threshold, performs a transmittable data volume notification, in which the stored data volumes of the pre-encryption data buffer (102) and the post-encryption data buffer (104) are set to “0,” to the BSR MAC control element generation unit (115).
摘要:
The CM controller 101 outputs times at which signals are sent to various communication terminal apparatuses in a compressed mode based on information on the compressed mode sent from a host station such as a control station apparatus to the scheduler 102, coder 105 and modulator 106. The scheduler 102 decides times (order) at which packet data is sent to the respective communication terminal apparatuses based on priority information such as channel conditions and times at which signals are sent in the compressed mode and outputs schedule information indicating the times for creating this packet data to the switch circuit 104. The switch circuit 104 outputs the packet data to be sent to the communication terminal apparatuses sequentially to the coder 105 according to the schedule created by the scheduler 102.
摘要:
At noise component addition section 105, a noise equivalent value equivalent in size to noise component is calculated using a constant which is dependent on a difference of spreading factors between a common pilot channel and packet channels, and at correlation matrix and correlation vector calculation section 106, the noise equivalent value is added to diagonal elements of an autocorrelation matrix. At weight calculation section 107, an optimal weight is calculated using the autocorrelation matrix whose diagonal elements have been added the noise equivalent value, and at adaptive equalization section 108, equalization of reception signal is carried out. Thereby, noise enhancement produced in the packet channels after the equalization due to the difference between the spreading factor of the common pilot channel and the spreading factor of the packet channels can be reduced.
摘要:
A UE/queue selected by a scheduler is input to an offset table (111) and a corresponding offset value is output to a CQI conversion section (112). Using this offset value, the CQI conversion section (112) converts a CQI output from a demodulation/decoding section and outputs the converted CQI to an adaptive modulation parameter determination section (113). Based on the converted CQI, the adaptive modulation parameter determination section (113) determines and outputs adaptive modulation parameters with reference to an adaptive modulation parameter table (114). Then, a transmission packet is adaptively modulated using these adaptive modulation parameters. This makes it possible to realize fast data transmission while satisfying QoS of the transmission packet.
摘要:
This invention relates to a base station apparatus (eNB) capable of reducing the data processing delay (U-plane latency) by more amount than an LTE system during a semi-persistent scheduling. In an eNB (100), which is operative to perform a semi-persistent scheduling for a UE, a scheduler (102) performs, in accordance with the service type of a service to be used by the UE, a scheduling of upstream data to be transmitted by the UE, and a radio processing unit (103) transmits, to the UE, scheduling information indicating a result of the scheduling performed by the scheduler (102). Here, when the UE is to use a service corresponding to a semi-persistent scheduling, the scheduler (102) is triggered, by the establishment of a radio bearer of the service corresponding to the semi-persistent scheduling between the eNB (100) and the UE, to perform the semi-persistent scheduling.
摘要:
Provided is a communication system that can set, in an RLC layer, an RLC STATUS PDU without depending on the resource allocation of each of a plurality of LCHs and with the latest data state and that can generate an RLC data PDU. In this system, an RLC unit (RLC layer) (120) receives, from a MAC unit (MAC layer) (110), a total radio resource size together with the allocated radio resource size of each logic channel (LCH). Further, the RLC unit (RLC layer) (120) refers to the allocated size of each LCH and sets transport data of each LCH within the range of the total radio resource size.
摘要:
A transmission rate determining method that enables assignment of transmission rate (modulation scheme and coding rate) to be optimized with high accuracy in the AMC technique. In the method, in a base station, Doppler frequency detector 117 detects the Doppler frequency (moving speed) of each mobile station. MCS assignment section 125 corrects a relational expression of MCS (coding rate and modulation scheme) and CIR based on the Doppler frequency (moving speed) obtained in Doppler frequency detector 117, for example, corrects a threshold in CIR, and determines MCS optimal for CIR report value. Results of assignment in MCS assignment section 125 are output to coding section 101 and modulation section 103.
摘要:
The PL signal of a PL portion is multiplied by gain factor βc in a multiplier(109) and the data of a data portion is multiplied by gain factor βd in a multiplier(110). These gain factors βc and βd are controlled in a weight controlling circuit (112). The PL signal and data thus multiplied by gain factors are added in an adder (111) and become an added PL signal. This added PL signal is output to a delay profile generation circuit (113). In the delay profile generation circuit (113), a delay profile is generated using the added PL signal. The delay profile is output to a path selection circuit (104) where path search is performed, and the information of selected reception timings are output to a RAKE combining circuit (105) and a channel estimation circuit (115). By this means, iterative path search and channel estimation can be performed with accuracy even when receiving signals where channels of different transmission power ratios are multiplexed.