摘要:
A radio communication method in which a mobile station receives signaling information transmitted by a base station via a shared control channel, detects a presence/absence of data addressed to the mobile station, demodulates a shared data channel when the data is present, and receives data transmitted by the base station. The method includes the steps of transmitting, from the base station to the mobile station, a synchronization request via the shared control channel and transmitting, at the mobile station, feedback information including channel quality information, as a response to the synchronization request, via a random access channel. The method also includes generating, at the base station, timing advance information when receiving the feedback information, and transmitting, from the base station to the mobile station, the timing advance information, and adjusting, at the mobile station, a transmission timing of uplink data based on the timing advance information.
摘要:
A radio base station eNB according to the present invention includes: a PRS transmission unit 12 configured to transmit PRS in subordinate cells #1 to #3; and a PDCCH signal transmission unit 10 configured to, when transmitting the PRS in the cells #1 to #3, generate and transmit a PDCCH signal by using PRS-RNTI.
摘要:
A user apparatus for use in a mobile communication system includes a reception unit configured to receive a signal transmitted from a base station and obtain a parameter for determining evaluation criteria on cell reselection; a counting unit configured to count a number of cell reselections; and a measurement unit configured to measure a Doppler frequency indicative of a mobility of the user apparatus. The evaluation criteria on cell reselection are that reception signal strength of a signal transmitted from a target base station has been higher than or equal to reception signal strength of a signal transmitted from a source base station by greater than or equal to a hysteresis threshold for longer than or equal to a time to trigger. It is determined whether the evaluation criteria on cell reselection are modified and used depending on whether both first and second conditions are satisfied. The first condition is that a number of cell reselections being performed within a predefined first period (TCRmax) is greater than or equal to a predefined first threshold (NCR or NCR2). The second condition is that the Doppler frequency has been higher than or equal to a predefined second threshold (FDthresh or FDthresh2) for a predefined second period (TFD). Modification of the evaluation criteria on cell reselection comprises at least modification of the time to trigger.
摘要:
A base station apparatus includes a classification unit configured to classify user apparatuses based on channel state of a radio link, a DRX (Discontinuous Reception) status memory configured to store information indicating which of multiple groups each of one or more of the user apparatuses conducting DRX belongs to, a determination unit configured to determine which of the groups the user apparatuses classified by the classification unit are to belong to with reference to the information stored in the DRX status memory, and an indication unit configured to indicate the determined groups to the user apparatuses. Each of the groups includes one or more of the user apparatuses activating simultaneously. The determination unit is configured to assign one of the user apparatuses having relatively poor channel state to one of the groups having a smaller number of simultaneously activating user apparatuses.
摘要:
A base station apparatus includes a unit configured to determine a discontinuous reception pattern for a user apparatus that is classified according to a channel state of a radio link; and a unit configured to report the discontinuous reception pattern to the user apparatus. The discontinuous reception pattern specifies at least a cycle of discontinuous reception.
摘要:
A base station includes a group determination unit grouping mobile stations residing within a cell and a radio channel condition reception unit receiving information indicative of a radio channel condition transmitted from a mobile station at a transmission timing of the radio channel condition corresponding to a group associated with the mobile station. Each mobile station includes a radio channel condition measurement unit evaluating a radio channel condition, a group determination unit determining a group associated with the mobile station, and a radio channel condition transmission unit transmitting information indicative of the evaluated radio channel condition at a transmission timing of the radio channel condition corresponding to the associated group.
摘要:
A mobile communication system is provided that performs bi-directional communications between a mobile station and a wireless access network device. The mobile station includes a connection set-up signal reception timing calculation unit for calculating a reception timing of a connection set-up signal when a connection request signal is transmitted, and a connection set-up signal reception determination unit that determines, according to the reception timing, whether the connection set-up signal is received, and performs a signal reception operation based on the determination. The wireless access network device includes a connection set-up signal scheduling unit that, after receiving a connection request signal from the mobile station, performs a connection set-up signal transmission assignment based on a reception timing of the connection request signal, a connection set-up signal generation unit that generates a connection set-up signal to be sent to the mobile station; and a connection set-up signal transmission unit that transmits the connection set-up signal based on the connection set-up signal transmission assignment.
摘要:
A base station includes a multicast group administration unit administering a multicast group to which a mobile station belongs, a timing determination unit determining an inter-frequency measurement timing when the mobile station measures a signal having a frequency different from a frequency for a residing cell of the mobile station, and a transmission unit transmitting data. The timing determination unit assigns an uniform inter-frequency measurement timing for at least two mobile stations belonging to the same multicast group. The transmission unit transmits data to a mobile station within the multicast so as to avoid the inter-frequency measurement timing.
摘要:
When a radio resource allocation channel transmitted from a radio base station (eNB) at a discontinuous reception timing satisfies a specific condition, a mobile station (UE) is configured not to start a continuous reception of a signal transmitted from the radio base station (eNB), but to continue the discontinuous reception of a signal transmitted from the radio base station (eNB), even though the mobile station (UE) is performing the discontinuous reception of a signal transmitted from the radio base station (eNB).
摘要:
A transmitter (10) is provided with an MAC-PDU generating section (12), which multiplexes an information element and generates an MAC-PDU; and a first data unit transmitting section (13), which transmits the generated MAC-PDU, in an MAC layer. The information element is of an MAC-SDU received from an RLC layer, an MAC control block or padding. The MAC-PDU generating section (12) adds to an MAC-PDU an MAC header including a C/T for identifying the type of the information element to be multiplexed into the MAC-PDU and an LI for indicating the size of the information element.