摘要:
An apparatus for controlling call admission, comprising a call admission check unit which determines whether to admit a call in response to reception of the call based on a threshold that reflect history of base station transmission power.
摘要:
When a handover standby threshold falls below a received power of perch channel from a base station 150-1 of a communication partner, a mobile station 110 sends a handover standby operation request to a base station control apparatus 130, and notifies of history of movement of itself and receives powers of perch channels from base stations 150-2–150-4 surrounding the communication partner (mobile station information). The base station control apparatus 130 compares the mobile station information with history of mobile station information so that a handover destination candidate base station is selected and sent to the mobile station 110. The mobile station 110 switches the communication partner to the handover destination candidate base station when received power of the perch channel from the base station 150-1 falls below a handover threshold.
摘要:
A transmission power control apparatus for a wireless communication apparatus which reduces a power value of a signal input to a power amplifier to the maximum allowable input power value of the power amplifier or below is provided in which the transmission power control apparatus includes: a part for setting a transmission power upper limit value of a call according to a circuit type of the call; and a part for reducing transmission power for the call to the transmission power upper limit value or below.
摘要:
Priority is given to handover calls over new calls in a mobile communications system using the CDMA method. This is achieved by rejecting requests for new calls in any one of the cases in which: an uplink interference amount estimated if the requested call is accepted exceeds an interference threshold level; a downlink total transmission power estimated if the requested call is accepted exceeds a downlink transmission power threshold; and an amount of spread code resources estimated if the requested call is accepted is lower than a spread code threshold.
摘要:
In resource measurement device 32, a measured value x of resource use condition is acquired in respect of the wireless resource to be monitored. Furthermore, in comparators 34 and 35, the measured value x is compared with the call admission threshold value xA of service A or with the call admission threshold value xB of service B, respectively. Comparison result selector 36 then selects one or other of the comparison results of comparators 34 and 35 in accordance with the type or degree of priority of the service of the call requested, identified by service identifier 33, and call admission control device 31 restricts new call admission in accordance with the selected comparison result. Thus, the call admission control method, communication system and base station device wherein deterioration of communication quality is suitably suppressed by call admission control in accordance with the service that is being utilized are provided in communication in which access is performed with shared resources.
摘要翻译:在资源测量装置32中,针对要监视的无线资源获取资源使用条件的测量值x。 此外,在比较器34和35中,将测量值x与服务A的呼叫准入阈值x A A A或服务的呼叫准入阈值x B B进行比较 B。 比较结果选择器36然后根据由服务标识符33识别的所请求的呼叫的服务的类型或程度来选择比较器34和35的比较结果中的一个或另一个,并且呼叫许可控制设备31限制新呼叫 按照选定的比较结果进行入场。 因此,在通过共享资源进行访问的通信中,提供通过根据正在使用的服务的呼叫许可控制来适当地抑制通信质量的恶化的呼叫许可控制方法,通信系统和基站装置。
摘要:
Resource measurement device 32 acquires a measured value x of the resource use condition in transmitting/receiving section 20 in respect of the wireless resource that is the subject of monitoring. Also, correction value calculation device 33 calculates a correction value in accordance with the number of packet users at transmitting/receiving section 20 and adjustment device 34 adjusts the call acceptance threshold value xc using the correction value, so as to obtain a corrected threshold value xc′. Comparator 35 then compares the measured value of the resource use condition x and the corrected threshold value xc′ and outputs the comparison result to call acceptance control device 31. If x≧xc′, call acceptance control device 31 restricts acceptance of new calls. Thus, the call acceptance control method, mobile communication system and base station device whereby deterioration of communication quality is suppressed irrespective of the switching system are provided in mobile communication in which multiple access is performed with shared wireless resources.
摘要:
There is provided a handover control method that does not produce quality deterioration or other similar problems during handover in a mobile communication system in which a first channel shared by a plurality of mobile stations and second channels exclusively used by respective mobile are used in combination. A handover control method according to the present invention comprises: a step in which a data signal is transmitted from one base station 30A to a mobile station 10 by using a first channel; a step in which a control signal is transmitted from a plurality of base stations 30A, 30B including the base station 30A to the mobile station 10 by using a second channel; a step in which the mobile station 10 receives a plurality of control signals; a step in which, of the plurality of control signals received, information regarding reception quality of the control signal from the base station 30A that transmitted the data signal is transmitted from the mobile station 10 to the base station 30A; and a step in which information relating to reception quality is received by the base station 30A and transmission control is performed of the data signal transmitted by the base station 30A, in accordance with the received information relating to reception quality.
摘要:
A mobile station applied to a mobile communication system in which data transmission from base stations to mobile stations is performed by using a first channel shared by a plurality of mobile stations and second channels exclusively used by respective mobile stations, including a data signal reception section that receives a data signal transmitted from one of the base stations through the first channel, a control signal reception section that selects and receives a control signal from the base station that is the transmission source of the data signal received by the data signal reception section, of the plurality of control signals transmitted through the second channel, and a reception quality information transmission section for transmitting to the base station information regarding reception quality of the control signal received by the control signal reception section.
摘要:
A downlink user data signal destined for a specific mobile station (4-1) is always transmitted from a single base station while a plurality of base stations (3-1, 3-2, 3-3, . . . ) being switched from one to another. A first downlink signal destined for the mobile station (4-1) is transmitted from one or a plurality of base stations through a first downlink radio channel (downlink A-DPCR). The transmission power of a second downlink radio channel (PDSCH, HS-SCCH) for transmitting a second downlink signal from the base station (3-1) to the mobile station (4-1) is provided with an offset relative to the transmission power of the first downlink radio channel from the base station (3-1) to the mobile station (4-1), thereby linking the transmission power of the second downlink radio channel with the transmission power of the first downlink radio channel. If the number of diversity branches, i.e., the number of base stations (3-1, 3-2) simultaneously communicating with the mobile station (4-1) on the first downlink radio channel (downlink A-DPCH) is large, the offset for the transmission power of the second downlink radio channel (PDSCH, HS-SCCH) is increased. If the number of diversity branches is small, the offset for the transmission power of the second downlink radio channel is decreased. In this way, the offset is determined. As a result, in mobile packet communication that transmits user data for a plurality of mobile stations through a single radio channel by temporally multiplexing the data, the reception quality of the second downlink signal transmitted from the specific base station (3-1) on the second downlink radio channel (PDSCH, HS-SCCH) can always properly be maintained.
摘要:
A mobile station including a transmission power determining unit configured to determine a transmission power in an uplink shared channel, in accordance with a maximum transmission power value corresponding to power class of the mobile station, the number of resource blocks for the uplink shared channel, path loss between the mobile station and a radio base station which is a connection destination of the uplink shared channel, and transmission power control information received from the radio base station, where when receiving a maximum allowable transmission power value from the radio base station, the transmission power determining unit is configured to determine transmission power in the uplink shared channel, using the maximum allowable transmission power value instead of the maximum transmission power value corresponding to the power class of the mobile station.