摘要:
When detecting occurrence of an event for transmitting a measurement report of a radio condition of a cell at a frequency set for a base station apparatus, to the base station apparatus (3) communicating with a terminal apparatus (2), the terminal apparatus (2) in a wireless communication system (1) creates a measurement report including information indicating radio conditions of cells at a frequency at which the event occurred and at another different frequency. The base station apparatus (3) controls whether or not to perform handover of the terminal apparatus (2) to another cell, on the basis of the measurement report transmitted from the terminal apparatus (2). Thereby, there is provided a wireless communication system in which a base station apparatus and the terminal apparatus are communicable with each other using multiple frequencies, the wireless communication system being capable of shortening time required for handover.
摘要:
When detecting occurrence of an event for transmitting a measurement report of a radio condition of a cell at a frequency set for a base station apparatus, to the base station apparatus (3) communicating with a terminal apparatus (2), the terminal apparatus (2) in a wireless communication system (1) creates a measurement report including information indicating radio conditions of cells at a frequency at which the event occurred and at another different frequency. The base station apparatus (3) controls whether or not to perform handover of the terminal apparatus (2) to another cell, on the basis of the measurement report transmitted from the terminal apparatus (2). Thereby, there is provided a wireless communication system in which a base station apparatus and the terminal apparatus are communicable with each other using multiple frequencies, the wireless communication system being capable of shortening time required for handover.
摘要:
A communication terminal is capable of simultaneously communicating through a plurality of carriers by carrier aggregation, and the communication terminal comprises: a quality measurement unit for measuring the reception quality of a radio wave transmitted through a plurality of carriers from a base station of a connected cell to obtain a measured value; a primary carrier storage unit storing information specifying a primary carrier chosen from the plurality of carriers; a comparator for comparing a measured value of the primary carrier measured by the quality measurement unit to a threshold value; and a cell search unit for searching for another cell when the measured value of the primary carrier is less than or equal to the threshold value. Consequently, a search threshold value for carrier aggregation can be appropriately determined to perform a cell search and a quality measurement.
摘要:
A communication terminal is capable of simultaneously communicating through a plurality of carriers by carrier aggregation, and the communication terminal comprises: a quality measurement unit for measuring the reception quality of a radio wave transmitted through a plurality of carriers from a base station of a connected cell to obtain a measured value; a primary carrier storage unit storing information specifying a primary carrier chosen from the plurality of carriers; a comparator for comparing a measured value of the primary carrier measured by the quality measurement unit to a threshold value; and a cell search unit for searching for another cell when the measured value of the primary carrier is less than or equal to the threshold value. Consequently, a search threshold value for carrier aggregation can be appropriately determined to perform a cell search and a quality measurement.
摘要:
A wireless communication base station (10) comprises a system information generating unit (20) that generates system information including a several system information messages, a paging message generating unit (22) that generates a paging message including a modification flag that indicates whether or not the system information has been modified; and a transmitter (18) that transmits the system information and the paging message. The system information generating unit (20) generates system information including a system information message in which an emergency message is described, and the paging message generating unit (22) generates a paging message that further includes information indicating that the emergency message is present in the system information and an identifier that identifies a system information message in which the emergency message is described. Consequently, a wireless communication base station can be provided which is capable of urgently notifying system information to be broadcast at a schedule according to the urgency of the system information while suppressing modifications to the system information as much as possible.
摘要:
A base station 10 comprises a measurement report receiving unit 12 which receives a measurement report transmitted from a mobile terminal which is performing communication by using a plurality of bands through Band Aggregation; a handover determining unit 13 which determines whether or not handover is required, based on the measurement report; and a gap period setting unit 14 which, if it is determined that the handover is required, configures a gap period in which the communication is temporarily switched to a band different from a band in communication, in order to search for a band which is a destination of the handover. The gap period setting unit 14 also configures the gap period in the band in communication other than a band for which the measurement report is provided. Thereby, it is possible to provide the base station and the terminal in which effective configuration of the gap period is performed when the plurality of bands are used.
摘要:
Provided is a wireless communication apparatus that transfers information required for a terminal, which performs a carrier aggregation, to be handed over to another base station, while reducing the size of a measurement result report. When establishing wireless communication with the wireless communication base station by use of a plurality of cells of the wireless communication base station, a controller provided in a wireless communication apparatus determines whether to control the measurement result report preparation section so as to prepare the measurement result report by grouping measurement results of at least two cells of the plurality of cells or to control the measurement result report preparation section so as to prepare the measurement result report while including the measurement results of the plurality of respective cells.
摘要:
A wireless communication system comprises: a wireless base station that uses dedicated frequencies to communicate with only connected LTE-A terminals and uses shared frequencies to communicate with LTE terminals and LTE-A terminals; and an LTE-A terminal. The wireless base station comprises: a priority information creating section for setting a priority of each of the shared frequencies for idle LTE-A terminals, setting a priority of each of the plurality of frequencies for connected LTE-A terminals, and creating priority information indicative of the set priority; a system information creating section for creating system information that includes the priority information; and a transmission section for transmitting the system information. The LTE-A terminal receives system information transmitted from the wireless base station, and selects a frequency on which the LTE-A terminal camps and a frequency at which the LTE-A terminal transmits an RACH preamble based on the priority information included in the system information. In this way, the LTE-A terminal can be connected to an appropriate carrier.
摘要:
A wireless communication system comprises an MME (70) which generates a white list in which CSG cells being accessible by a UE (10) are enumerated, an HeNB gateway (50) which decides based on the white list whether or not access is possible, and a home base station (30) (80) of the CSG cell. The UE (10) comprises a manual selection executing unit which accepts manual selection of a CSG cell, and requests the Mobility Management Entity to add the CSG cell to the white list; and a measurement report message generating unit which generates the Measurement report message attached with information indicating that the white list is being updated, if the CSG cell which has been accepted by manual selection is comprised in CSG cells to be included in the Measurement report message, and the selected CSG cell is not included in the white list stored in a white list storing unit. Thereby, there is provided a wireless communication system which can perform handover in which a manual selection process is appropriately reflected.
摘要:
An ETWS according the invention comprises a macro base station, an HeNB, and a mobile terminal (1). The mobile terminal (1) comprises: a receiving section (11) for receiving paging and system information; a mobile control section (15) for controlling the receiving section (11) to receive paging from the macro base station even when the mobile terminal is in connection with the HeNB and in an idle state; a system information processing section (13) for processing system information transmitted from the macro base station to receive ETWS information when the received paging indicates that the ETWS information is present; and an ETWS information transmitting section (16) for transmitting the ETWS information to the HeNB. The HeNB transmits the ETWS information transmitted from the mobile terminal (1) to other mobile terminals (1). An ETWS and a mobile terminal that reduce a load of transmitting ETWS information to a number of home base stations are thereby provided.