Base station apparatus and control method for controlling channel density
AssigneeHitachi Communication Technologies, Ltd.
InventorKenzaburo Fujishima
Life of this patent
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Abstract
A base station apparatus is provided for adaptively controlling a maximal accommodation channel number per unit area (for example, the coverage area of a cell or sector) in accordance with a traffic quantity without relying upon detachment of a mobile base station and installation of a repeater. Upon inputting of a plurality of baseband signals of a user channel-multiplexed channel group, linear coupling is performed by a weight which is different per area that outputs it, thereby enabling control of the channel density. Additionally, a per-group available channel number is constantly monitored to control the weight while using threshold judgment for the available channel number as a trigger, thus achieving situation-sensitive prompt handleability.
Claims14
A base station apparatus comprising a plurality of front end units for transmitting and receiving signals via antennas to and from a plurality of mobile stations and a signal processing unit coupled to said plurality of front end units and a network for performing processing of the signals being transmitted and received,
- wherein said signal processing unit comprises:
- a plurality of modulator units for modulating a signal received from said network and to be transmitted to a mobile station in each area to which the mobile station that is a destination of the transmission signal belongs;
- a weight combining unit for performing weight combining of outputs from at least a part of said plurality of modulator units and for outputting a result of the weight combining to said plurality of front end units;
- and
- wherein communication is performed while assigning a channel to each mobile station and wherein a weight matrix used for said weight combining is controlled based on an available channel number per said area.
A communication control method for use in a base station apparatus comprising a plurality of front end units for transmitting and receiving signals via antennas to and from a plurality of mobile stations and a signal processing unit connected to a network and said plurality of front end units for performing processing of the signals being transmitted and received, said method comprising the steps of:
- causing said signal processing unit to modulate a signal being received from said network and to be transmitted to a mobile station in each area to which the mobile station that is a destination of the transmission signal belongs;
- performing weight combining of outputs from at least a part of said plurality of modulator units and for outputting the result output to said plurality of front end units;
- and
- wherein communication is performed while assigning a channel to each mobile station and wherein a weight matrix used for said weight combining is controlled based on an available channel number for each of said areas.
Dependencies are inferred from the claim text.