摘要:
A slot allocation apparatus for allocating slots in communicating with plural mobile stations in accordance with FDD/TDD scheme includes (a) traffic property detecting means for detecting a property of input traffic; (b) slot allocation priority determining means for determining which of an uplink and a downlink should be given a higher priority for the slot allocation, based on a priority of the traffic derived from the detected property of the input traffic; and (c) slot allocating means for allocating the uplink and downlink slots for the mobile stations, based on the determination result.
摘要:
There are provided a channel estimation unit for achieving highly accurate channel estimation, a CDMA receiver and a CDMA transceiver with the channel estimation unit. Channel estimates of data symbols are obtained from pilot symbols in a combined symbol sequence which has a plurality of slots and includes the data symbols and the pilot symbols. First, the pilot symbols in the combined symbol sequence are located. Second, pilot blocks are generated by extracting the pilot symbols from two or more slots in the combined symbol sequence. Third, channel estimates of the data symbols are obtained by calculating a weighted sum of averages of the pilot symbols in the individual pilot blocks. The weighted sum is carried out using appropriate weighting factors for individual data symbols in each slot. This enables highly accurate channel estimation.
摘要:
A base station 100 includes: a parameter control unit 103 configured to select either a normal control parameter used during normal time or an emergency control parameter used during an emergency where the number of voice calls to be handled increases from the number during normal time; and a scheduling unit 105 configured to schedule a PDSCH for a mobile station 200A based on either the normal control parameter or the emergency control parameter selected by the parameter control unit 103. The normal and emergency control parameters allow the number of voice calls processable by the base station 100 to change, and the emergency control parameter increases the number of processable voice calls to a number larger than that of the normal control parameter.
摘要:
A radio base station eNB according to the present invention includes: a CQI reception unit 11 configured to receive CQI in PDSCH from a mobile station UE; a CQI adjustment unit 13 configured to adjust the received CQI based on a transmission acknowledgement result for a downlink data signal transmitted via the PDSCH; a selectable TF number calculation unit 22 configured to calculate a selectable maximum transport block size based on the number of mobile stations UE in each scheduling unit period; and an MCS selection unit 15 configured to select a modulation scheme and a coding rate, which are to be applied to each resource blocks in the PDSCH, based on the adjusted CQI and a transmission format corresponding to the calculated selectable maximum transport block size.
摘要:
A communication device includes a network side communication unit that receives emergency information from an information broadcasting node; a UE side communication unit that communicates a communication signal with user equipment through a radio base station; and a determination unit that determines whether to allow state transition, when the UE side communication unit receives a request signal requesting the state transition of an RRC protocol state from the user equipment, subsequent to broadcasting a Primary Notification signal providing notice of broadcasting of the emergency information. When the state transition is from a state in which receiving of the emergency information is enabled to a state in which receiving of the emergency information is disabled, the determination unit determines to disallow the state transition, and broadcasts a Secondary Notification signal including the emergency information.
摘要:
A base station that performs radio communication with a mobile station includes an index calculation unit that calculates an index representing interference in a frequency band, wherein the frequency band is to be utilized by a different base station; a frequency band selection unit that selects the frequency band based on the index calculated by the index calculation unit, wherein, in the frequency band, the interference is less than or equal to a predetermined threshold value; and a communication unit that performs the radio communication with the mobile station in the frequency band selected by the frequency band selection unit.
摘要:
A disclosed base station includes a transmission-rate determining unit for determining a transmission rate of a control channel for transmitting an upper-layer control signal, and a transmitter for allocating a predetermined bandwidth to the control channel for transmitting the upper-layer control signal according to the determined transmission rate, and transmitting the signal.
摘要:
An OFDM signal receiving apparatus (30) includes a receiver section (31) configured to perform receiving processing on a received OFDM signal, for each OFDM symbol duration period; a plurality of deinterleaving sections (341 . . . 34n) each configured to perform deinterleaving processing on data acquired through the receiving processing, in a unit of an interleaving block; and a plurality of decoder sections (361 . . . 36n) each configured to perform decoding processing on data outputted from a corresponding one of the plurality of deinterleaving sections (341 . . . 34n). The interleaving block is a part of a transmission time interval block including data to be transmitted in a transmission time interval.
摘要:
A radio communications apparatus having a retransmission function that has a determination portion configured to receive an error detection result obtained for a first packet transmitted to a destination apparatus and determine in a first sub-layer whether the error detection result is a positive acknowledgement; a transmission portion configured to transmit a second packet following the first packet to the destination apparatus; a timer portion configured to measure a predetermined period of time after the second packet is transmitted; and a report portion configured to report to a second sub-layer that is an upper sub-layer of the first sub-layer that the error detection result is the positive acknowledgement when no message is received from the destination apparatus during the predetermined period of time, the message indicating that the error detection result is falsely determined to be the positive acknowledgement.
摘要:
A radio base station according to the present invention includes: a downlink data resumption processing unit configured to transmit an RA preamble assignment signal to a mobile station, when a positioning trigger is detected in a state in which no synchronization is established in an uplink between the radio base station and the mobile station; and a propagation delay calculation unit configured to calculate propagation delay in the uplink, in response to reception of a RA preamble assigned by the RA preamble assignment signal.