摘要:
A system is provided in which capacity and satisfaction rate with a quality of service in packet communications performed through a radio link established between a transmitting station and a receiving station is improved by dynamically limiting transmission power of packets in the transmitting station and keeping an increase of an interference level in the receiving station, which belongs to another cell, within a TPC margin. The present invention includes a resource allocator configured to set transmission power of packets in a next step period, by use of transmission power of packets in a preceding step period (slot) and an interference level of the receiving station.
摘要:
A base station includes a channel quality detecting unit that detects channel quality between the base station and a mobile station, a buffered data amount monitoring unit, and a modulation and coding set determination unit. The modulation and coding set determination unit determines a modulation and coding set, as a downlink modulation scheme for packet communications, such that a prescribed communication condition corresponding to the channel quality is satisfied, and that padding added to the data buffered in a transmission buffer for subsequent transmission to the mobile station becomes the minimum.
摘要:
A time slot assigning method for assigning a time slot for transmission of a signal between a base station and a mobile station in each frame is provided. The method comprises assigning a first slot group used for transmission of a down signal from the base station to the mobile station; assigning a second slot group used for transmission of an up signal from the mobile station to the base station are assigned; and arranging a third slot group immediately after the first slot group, the third slot group being used giving a priority to transmission of another down signal from the base station to the mobile station.
摘要:
In a packet communications method of performing packet communications between a mobile station and a base station, the base station manages an amount of packets stored in a transmission buffer of the mobile station. The mobile station notifies a changed result of an amount of packets stored in the transmission buffer of the mobile station, when the amount of packets stored in the transmission buffer of the mobile station changes. The base station changes a managed amount in accordance with the changed result notified from the mobile station.
摘要:
In a radio communication system where, concerning the maximum allowable delay and the reception error rate as required values for QoS, a first mobile station group of which the maximum allowable delay is less than a reference value and the reception error rate is a reference value or more, and a second mobile station group of which the maximum allowable delay is a reference value or more and the reception error rate is less than a reference value coexist, the base station sets the transmission power margin for a mobile station of the first mobile station group to be higher than the transmission power margin for a mobile station of the second mobile station group, and a mobile station of the first mobile station group sets the transmission power margin to be higher than the transmission power margin of a mobile station of the second mobile station group.
摘要:
In a mobile communication system having a plurality of radio base stations and a mobile station, a radio base station selection method in which a radio base station to start communicating with a mobile station is selected from among adjacent radio base stations capable of communicating with the mobile station is provided. The method includes the steps of requiring, by a radio base station in service, a radio channel availability report from each of adjacent radio base stations indicated by the mobile station, in response to a signal for requesting connection to the mobile station; selecting a radio base station to be connected to the mobile station, based on the radio channel availability reports obtained from the adjacent radio base stations; and notifying the mobile station of information necessary for communicating with the selected radio base station.
摘要:
A base station includes: an acquisition unit for acquiring a quantity of stored packets from a mobile station, the quantity of stored packets being stored in a buffer for storing the packets transmitted by the mobile station; a radio resource controller for allocating priority radio resources preferentially usable by the mobile station to a radio channel for the mobile station, and for allocating usable radio resources allowed to be used by the mobile station from the priority radio resources to the mobile station by use of the quantity of stored packets acquired by the acquisition unit; and a result notification unit for reporting a result of the allocation by the radio resource controller to the mobile station.
摘要:
It is an object to control the traffic that flows in a radio link to ensure the stability of the network as well as to prevent the deterioration of the communication quality due to the transmission of packets exceeding the capacity, and to increase the communication capacity. A communication control system in a packet mobile communication transmits a downlink packet from a base station to a mobile station via a radio network. The base station includes a transmission determiner that determines whether or not to transmit the downlink packet to the radio network in accordance with the state of congestion of the radio network and the traffic type (DSCP) of the downlink packet.
摘要:
The present invention improves a system capacity and satisfaction rate with a quality of service in packet communications performed through a radio link established between a transmitting station and a receiving station by dynamically limiting transmission power of packets in the transmitting station and keeping an increase of an interference level in the receiving station, which belongs to another cell, within a TPC margin. The present invention includes a resource allocator 115 configured to set transmission power of packets in a next step period, by use of transmission power of packets in a preceding step period (slot) and an interference level of the receiving station.
摘要:
In packet communications between a mobile terminal and a base station, the mobile terminal checks a priority level of a traffic and judges a type of the traffic, and transmits a reservation signal for a transmission request to the base station when the type of the traffic is a high priority level or realtime type, and does not transmits it when the type of the traffic is a low priority level or non-realtime type, while the base station determines a resource amount to be reserved for packet transmission according to a resource utilization state and the reservation signal for the traffic of the high priority level or realtime type, or an average transmission interval or transmission rate for the traffic of the low priority level or non-realtime type according to margins in remaining resources, and notifies the resource amount or the average transmission interval or transmission rate to the mobile terminal.