摘要:
The present invention relates to a method for determining a radio zone and an uplink transmission power, wherein each of base stations transmits broadcast information indicating a perch channel transmission power level and an uplink interference level via a corresponding perch channel, and a mobile station receives the broadcast information from near base stations around the mobile station, detects respective reception levels of the perch channels for the near base stations, calculates respective path losses between the mobile station and respective near base stations on the basis of the respective reception levels and the respective perch channel transmission power levels within the broadcast information, calculates respective uplink transmission power levels between the mobile station and respective near base stations on the basis of the calculated respective path losses, the respective uplink interference levels within the broadcast information, and required signal-to-interference ratios involved in reception by the near base stations, selects a radio zone in which the necessary uplink transmission power level is minimum among the respective necessary uplink transmission power levels, the base station of the selected radio zone being ready for communication with the mobile station or being able to commence communication with the mobile station after handover, and controls an uplink transmission power in the selected radio zone based on the necessary uplink transmission power level of the selected radio zone.
摘要:
In the method of handover control according to the present invention, when the mobile station recognizes that it has moved to an overlapping area, the mobile station notifies this fact to the network side and in response the network side sets up only a communication channel between the handover target base station and the exchange station for controlling that handover target base station, without setting up a radio channel between the handover target base station and the mobile station, while continuing the communication by not releasing the communication channel between the currently located base station and the exchange station and the radio channel between the currently located base station and the mobile station, so that it becomes possible to reduce a transmission control load for transmission between the base station and the exchange station as well as a control load for controlling the exchange station itself.
摘要:
The present invention relates to a mobile communication system, wherein a plurality of channels can be established on a single carrier frequency by code division multiplex access, characterized in that the system comprises code-resource-assigning means for assigning at least a part of an assignable code resource to one of the channels in accordance with a transmission rate necessary for the corresponding channel, the part corresponding to a certain bandwidth corresponding to the transmission rate.
摘要:
A wire line data transmission scheme in a mobile communication system for reducing the wire line transmission const. Radio state qualities of a plurality of radio channels between the plurality of base stations and the mobile station are measured, and a validity and a redundancy in composition of each radio channel is judged according to the corresponding measured radio state quality. Then, a transmission in the wire line transmission paths is controlled by stopping a transmission of transmission signals for those radio channels which are judged as invalid or redundant according to the obtained judgement result. All of measuring, judging, and controlling can be carried out by each base station, or by the mobile station. Also, measuring and judging can be carried out by the mobile station while controlling is carried out by each base station, or measuring can be carried out by the mobile station while judging and controlling can be carried out by each base station.
摘要:
The present invention relates to a method for controlling a branch replacement wherein at least a current branch between a network and a mobile station are replaced with a plurality of branches necessary for communication using diversity handover when the branch replacement is necessary for the mobile station and when it is recognized that the mobile station can commence communicating using diversity handover if the branch replacement is carried out, thereby enabling the mobile station to commence diversity handover.
摘要:
A wire line data transmission scheme in a mobile communication system for reducing the wire line transmission const. Radio state qualities of a plurality of radio channels between the plurality of base stations and the mobile station are measured, and a validity and a redundancy in composition of each radio channel is judged according to the corresponding measured radio state quality. Then, a transmission in the wire line transmission paths is controlled by stopping a transmission of transmission signals for those radio channels which are judged as invalid or redundant according to the obtained judgement result. All of measuring, judging, and controlling can be carried out by each base station, or by the mobile station. Also, measuring and judging can be carried out by the mobile station while controlling is carried out by each base station, or measuring can be carried out by the mobile station while judging and controlling can be carried out by each base station.
摘要:
In the method of handover control according to the present invention, when the mobile station recognizes that it has moved to an overlapping area, the mobile station notifies this fact to the network side and in response the network side sets up only a communication channel between the handover target base station and the exchange station for controlling that handover target base station, without setting up a radio channel between the handover target base station and the mobile station, while continuing the communication by not releasing the communication channel between the currently located base station and the exchange station and the radio channel between the currently located base station and the mobile station, so that it becomes possible to reduce a transmission control load for transmission between the base station and the exchange station as well as a control load for controlling the exchange station itself.
摘要:
The present invention relates to a mobile station communicating with a network over the air, comprising decipherment-onset-time-setting-means for setting a time to start deciphering an enciphered reception signal dependently on a time to start enciphering a transmission signal in the network and independently of a time to start enciphering a transmission signal in the mobile station.
摘要:
The present invention relates to a mobile station communicating with a network over the air, comprising encipherment-procedure-notifying-means for notifying the network about encipherment-procedure-specifying-information specifying one or more possible encipherment procedures of the mobile station.
摘要:
The present invention relates to a method for mobile communication carried out among a plurality of mobile stations and a network, wherein personal identifiers are previously assigned to mobile stations. The method comprises the steps of assigning temporary identifiers to mobile stations in communication with the network, storing the personal identifiers and the temporary identifiers of the mobile stations by the network, storing the personal identifiers and the temporary identifiers of each mobile station by the mobile station, detecting, by the network, that one of the temporary identifiers stored in itself is different from that stored in the corresponding mobile station, and reassigning, by the network, another temporary identifier to the mobile station of which the former temporary identifier stored in the network is detected to be different from that stored in the corresponding mobile station.